LTC6258 LINER
Document overview
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Technical content
1For more information www.linear .com/L TC6258
APPLICATIONS
n Micropower Active Filters n Portable Instrumentation n Battery or Solar Powered Systems n Automotive Electronics n Gain Bandwidth Product: 1.3MHz n Low Quiescent Current: 20µA n C-Load™ Op Amp Drives all Capacitive Loads n Offset Voltage: 400µV Maximum n Rail-to-Rail Input and Output n Supply Voltage Range: 1.8V to 5.25V n EMI Rejection Ratio: 45dB at 1GHz n Input Bias Current: 75nA Maximum n CMRR/PSRR: 95dB/90dB n Shutdown Current: 7µA Maximum n Operating Temperature Range: –40°C to 125°C n Single in 6-Lead TSOT-23, 2mm × 2mm DFN Packages n Dual in 8-Lead MS8, MS10, TS0T-23, 2mm × 2mm DFN Packages n Quad in MS16 Package TYPICAL APPLICATION
DESCRIPTION
1.3MHz, 20µA Power Efficient Rail-to-Rail I/O Op Amps The LT C®6258/L TC6259/L TC6260 are single/dual/quad operational amplifiers with low noise, low power , low supply voltage, and rail-to-rail inputs and outputs. They are unity gain stable with or without capacitive loads. They feature 1.3MHz gain-bandwidth product, 0.24V/µs slew rate while consuming only 20µA of supply current per amplifier operating on supply voltages ranging from 1.8V to 5.25V . The combination of low supply current, low supply volt - age, high gain bandwidth product and low noise makes the LTC6258 family unique among rail-to-rail input/output op amps with similar supply current. These operational amplifiers are ideal for power efficient applications. For applications that require power -down, the L TC6258 in 2mm × 2mm DFN and L TC6259 MS10 packages respectively offer shutdown which reduces the current consumption to 7µA maximum. The L TC6258 family can be used as plug-in replacements for many commercially available op amps to reduce power and improve input/output range and performance. L, L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks and Over-The-Top and C-Load are trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. Low Noise Reference
FEATURES
Reference Buffer Noise Density V+ OUT L TC6258
6258960 TA01
22µF 22µF RIN1 2.7k 22µF IN OUT GND L T6656 * 2.7K + 22µF FIL TER OP AMP , 44µF CLOAD OP AMP FIL TERED REFERENCE REFERENCE OUTPUT INSTRUMENT ONL Y FREQUENCY (kHz) 0.01 0.1 100 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 NOISE DENSITY (nV/√Hz)
6258960 TA01a
6258960fa For more information www.linear .com/L TC6258 ABSOLUTE MAXIMUM RATINGS 0mA 20mA definite 0°C to 125°C (Note 1) DC PACKAGE 6-LEAD (2mm × 2mm × 0.8mm) PLASTIC DFN TOP VIEW OUT –IN SHDN V +IN V– 4 TJMAX = 150°C, qJA = 80°C/W (NOTE 6) EXPOSED PAD (PIN 7) IS V–, MUST BE SOLDERED TO PCB TOP VIEW OUTA –INA +INA OUTB –INB +INB DC PACKAGE 8-LEAD (2mm × 2mm × 0.8mm) PLASTIC DFN 3 6 TJMAX = 150°C, qJA = 80°C/W (NOTE 6) EXPOSED PAD (PIN 9) IS V–, MUST BE SOLDERED TO PCB TOP VIEW TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 OUTB –INB +INB OUTA –INA +INA V – + TJMAX = 150°C, qJA = 195°C/W (NOTE 6) OUTA –INA +INA V OUTB –INB +INB TOP VIEW MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, qJA = 163°C/W (NOTE 6) OUTA –INA +INA V SHDNA V OUTB –INB +INB SHDNB TOP VIEW MS PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 150°C, qJA = 160°C/W (NOTE 6) OUTA –INA +INA V +INB –INB OUTB NC OUTD –IND +IND V +INC –INC OUTC NC TOP VIEW MS PACKAGE 16-LEAD PLASTIC MSOP TJMAX = 150°C, qJA = 125°C/W (NOTE 6) TOP VIEW S6 PACKAGE 6-LEAD PLASTIC TSOT-23 SHDN –IN OUT +IN TJMAX = 150°C, qJA = 192°C/W (NOTE 6) PIN CONFIGURATION Specified Temperature Range (Note 5) 0°C 65°C to 150°C Lead Temperature (Soldering, 10 sec) 0°C
3For more information www.linear .com/L TC6258 ORDER INFORMATION 5V ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VSUPPL Y = 5V , VCM = VOUT = VSUPPL Y/2, CL = 10pF , VSHDN is unconnected. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOS Input Offset Voltage VCM = V– + 0.3V l –400 –1000 100 400 1000 µV µV VCM = V+ – 0.3V l –400 –1000 100 400 1000 µV µV ∆VOS/∆T Input Offset Voltage Drift VCM = V– + 0.3V , V+ – 0.3V 1.5 µV/°C IB Input Bias Current (Note 7) VCM = V– + 0.3V l –75 –5 75 nA VCM = V+ – 0.3V l –75 0 75 nA IOS Input Offset Current VCM = V– + 0.3V l –75 –1 75 nA VCM = V+ – 0.3V l –75 –1 75 nA en Input Voltage Noise Density f = 1kHz 38 nV/√Hz Input Noise Voltage f = 0.1Hz to 10Hz 2 µVP-P in Input Current Noise Density f = 1kHz, VCM = 0V to 4V f = 1kHz, VCM = 4V to 5V 500 500 fA/√Hz fA/√ Hz RIN Input Resistance Differential Common Mode MΩ MΩ TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE L TC6258IS6#TRMPBF L TC6258IS6#TRPBF L TGWD 6-Lead Plastic TSOT-23 –40°C to 85°C L TC6258HS6#TRMPBF L TC6258HS6#TRPBF L TGWD 6-Lead Plastic TSOT-23 –40°C to 125°C L TC6258IDC#TRMPBF L TC6258IDC#TRPBF LGZS 6-Lead Plastic DFN (2mm × 2mm × 0.8mm) –40°C to 85°C L TC6258HDC#TRMPBF L TC6258HDC#TRPBF LGZS 6-Lead Plastic DFN (2mm × 2mm × 0.8mm) –40°C to 125°C L TC6259ITS8#TRMPBF L TC6259ITS8#TRPBF L TGWX 8-Lead Plastic TSOT-23 –40°C to 85°C L TC6259HTS8#TRMPBF L TC6259HTS8#TRPBF L TGWX 8-Lead Plastic TSOT-23 –40°C to 125°C L TC6259IDC#TRMPBF L TC6259IDC#TRPBF LGWT 8-Lead (2mm × 2mm × 0.8mm) Plastic DFN –40°C to 85°C L TC6259HDC#TRMPBF L TC6259HDC#TRPBF LGWT 8-Lead (2mm × 2mm × 0.8mm) Plastic DFN –40°C to 125°C TUBE L TC6259IMS8#PBF L TC6259IMS8#TRPBF L TGWW 8-Lead Plastic MSOP –40°C to 85°C L TC6259HMS8#PBF L TC6259HMS8#TRPBF L TGWW 8-Lead Plastic MSOP –40°C to 125°C L TC6259IMS#PBF L TC6259IMS8#TRPBF L TGWY 10-Lead Plastic MSOP –40°C to 85°C L TC6259HMS#PBF L TC6259HMS8#TRPBF L TGWY 10-Lead Plastic MSOP –40°C to 125°C L TC6260IMS#PBF L TC6260IMS#TRPBF 6260 16-Lead Plastic MSOP –40°C to 85°C L TC6260HMS#PBF L TC6260HMS#TRPBF 6260 16-Lead Plastic MSOP –40°C to 125°C Consult L TC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container . Parts ending with PBF are RoHS and WEEE Compliant. For more information on lead free part marking, go to: http://www .linear .com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear .com/tapeandreel/. http://www.linear .com/product/L TC6258#orderinfo
6258960fa For more information www.linear .com/L TC6258 5V ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VSUPPL Y = 5V , VCM = VOUT = VSUPPL Y/2, CL = 10pF , VSHDN is unconnected. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS CIN Input Capacitance Differential Common Mode 0.65 1.2 pF pF CMRR Common Mode Rejection Ratio V CM = 0.3V to 3.5V VCM = –0.1V to 5.1V l l dB dB IVR Input V oltage Range l –0.1 5.1 V PSRR Power Supply Rejection Ratio VCM = 0.4V , VS = 1.8V to 5.25V l 90 dB dB Supply Voltage Range l 1.8 5.25 V AV Large Signal Gain VOUT = 0.5V to 4.5V , RLOAD = 100k l 2.8
40 V/mV
VOUT = 0.5V to 4.5V , RLOAD = 10k l 3.5 0.5
10 V/mV
V /mV VOL Output Swing Low (Input Overdrive 30mV). Measured from V No Load l 12 40 mV mV I SINK = 100µA l 80 105 120 mV mV I SINK = 1mA l 145 180 250 mV mV V OH Output Swing High (Input Overdrive 30mV). Measured from V No Load l 25 40 mV mV I SOURCE = 100µA l 35 55 100 mV mV I SOURCE = 1mA l 100 140 350 mV mV I SC Output Short-Circuit Current l 10 mA mA I S Supply Current per Amplifier l 20 23 µA µA Supply Current in Shutdown l 4 5 µA µA I SHDN Shutdown Pin Current VSHDN = 0.6V VSHDN = 1.5V l l 200 nA nA VIL SHDN Input Low Voltage Disable l 0.6 V VIH SHDN Input High Voltage Enable l 1.5 V tON Turn-On Time SHDN Toggle from 0V to 5V 152 µs tOFF Turn-Off Time SHDN Toggle from 5V to 0V 7 µs GBW Gain-Bandwidth Product f = 10kHz l 1.0 0.4
1.3 MHz
t S Settling Time, 0.5V to 4.5V , Unity Gain 0.1% 0.01% µs µs SR Slew Rate A V = –1, VOUT = 0.5V to 4.5V , CLOAD = 10pF , RF = RG = 10kΩ l 0.2 0.1
0.24 V/µs
V /µs FPBW Full Power Bandwidth (Note 8) 4VP-P 20 kHz THD+N Total Harmonic Distortion and Noise f = 500Hz, AV = 2, RL = 4kΩ, VOUTP-P = 1V VIN = 2.25V to 2.75V 0.025 dB ILEAK Output Leakage Current in Shutdown V SHDN = 0V , VOUT = 0V VSHDN = 0V , VOUT = 5V l l 100 100 nA nA %MP Large Signal Overshoot V IN = 0.5V to 4.5V , AV = 1, CL = 100nF 2.7 % EMIRR Electromagnetic Interference Rejection Ratio Input Power –10dB to Input Pins at 1GHz 45 dB
5For more information www.linear .com/L TC6258 1.8V ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VSUPPL Y = 1.8V , VCM = VOUT = 0.4V , CL = 10pF , VSHDN is unconnected. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOS Input Offset Voltage VCM = V– + 0.3V l –400 –1000 100 400 1000 µV µV VCM = V+ – 0.3V l –400 –1000 100 400 1000 µV µV ∆VOS/∆T Input Offset Voltage Drift VCM = V– + 0.3V , V+ – 0.3V 1.5 µV/°C IB Input Bias Current (Note 7) VCM = V– + 0.3V l –75 2 75 nA VCM = V+ – 0.3V l –75 5 75 nA IOS Input Offset Current VCM = V– + 0.3V l –75 2 75 nA VCM = V+ – 0.3V l –75 2 75 nA en Input Voltage Noise Density f = 1kHz, VCM = 0.4V 38 nV/√Hz Input Noise Voltage f = 0.1Hz to 10Hz 2 µVP-P in Input Current Noise Density f = 1kHz, VCM = 0V to 0.8V f = 1kHz, VCM = 1V to 1.8V 500 500 fA/√Hz fA/√ Hz RIN Input Resistance Differential Common Mode MΩ MΩ C IN Input Capacitance Differential Common Mode 0.65 1.2 pF pF CMRR Common Mode Rejection Ratio V CM = 0.2V to 1.6V l 90 dB dB IVR Input V oltage Range l –0.1 1.9 V PSRR Power Supply Rejection Ratio VCM = 0.4V , VS = 1.8V to 5.25V l 90 dB dB A V Large Signal Gain VOUT = 0.5V to 1.3V , RLOAD = 100k l 1.6
50 V/mV
VOUT = 0.5V to 1.3V , RLOAD = 10k l 0.4 VOL Output Swing Low (Input Overdrive 30mV), Measured from V No Load l 15 30 mV mV I SINK = 100µA l 80 110 130 mV mV I SINK = 1mA l 150 200 230 mV mV
6258960fa For more information www.linear .com/L TC6258 Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The inputs are protected by back-to-back diodes as well as ESD protection diodes to each power supply. If the differential input voltage exceeds 1.4V or the input extends more than 500mV beyond the power supply, the input current should be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum rating when the output is shorted indefinitely. Note 4: LTC6258I/LTC6259I/LTC6260I and LTC6258H/LTC6259H/ LTC6260H are guaranteed functional over the temperature range of –40°C to 125°C. 1.8V ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VSUPPL Y = 1.8V , VCM = VOUT = 0.4V , CL = 10pF , VSHDN is unconnected. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOH Output Swing High (Input Overdrive 30mV), Measured from V+ No Load l 25 40 mV mV I SOURCE = 100µA l 35 60 100 mV mV I SOURCE = 1mA l 95 140 300 mV mV I SC Output Short-Circuit Current l 10 mA mA I S Supply Current per Amplifier l 20 21 µA µA Supply Current in Shutdown l 1.0 1.5 µA µA I SHDN Shutdown Pin Current VSHDN = 0.5V VSHDN = 1.5V l l nA nA V IL SHDN Input Low Voltage Disable l 0.5 V VIH SHDN Input High Voltage Enable l 1.5 V tON Turn-On Time SHDN Toggle From 0V to 1.8V 47 µs tOFF Turn-Off Time SHDN Toggle From 1.8V to 0V 17 µs GBW Gain-Bandwidth Product f = 10kHz l 1.0 0.4 T S Settling Time, 0.3V to 1.5V , Unity Gain 0.1% 0.01% µs µs SR Slew Rate A V = –1, VOUT = 0.3V to 1.5V , CLOAD = 10pF RF = RG = 10kΩ l 0.16 0.1
0.22 V/µs
V /µs FPBW Full Power Bandwidth (Note 8) 1.2VP-P 58 kHz THD+N Total Harmonic Distortion and Noise f = 500Hz, AV = 2, RL = 4kΩ, VOUTP-P = 1V VIN = 0.65V to 0.15V 0.04 dB No te 5: The LTC6258I/LTC6259I/LTC6260I are guaranteed to meet specified performance from –40°C to 85°C. The LTC6258H/LTC6259H/ LTC6260H are guaranteed to meet specified performance from –40°C to 125°C. Note 6: Thermal resistance varies with the amount of PC board metal connected to the package. The specified values are for short traces connected to the leads. Note 7: The input bias current is the average of the currents into the positive and negative input pins. Note 8: Full power bandwidth is calculated from the slew rate FPBW = SR/π • V P-P.
7For more information www.linear .com/L TC6258 TYPICAL PERFORMANCE CHARACTERISTICS Input Offset Drift Distribution VOS vs Supply Voltage (25°C) VOS vs Common Mode Voltage VOS vs IOUT Input Bias Current vs Common Mode Voltage Input Bias Current vs Common Mode Voltage Input V OS Histogram Input VOS Histogram VOS vs Temperature V S = ±2.5V V CM = 0V V OS (µV) –350 –250 –150 –50 150 250 350 100 NUMBER OF PARTS
6258 G01
V S = ±2.5V V CM = 2.2V V OS (µV) –350 –250 –150 –50 150 250 350 100 NUMBER OF PARTS
6258 G02
V S = ±2.5V V CM = 0V TEMPERATURE (°C) –40 –25 –10 110 125 –500 –400 –300 –200 –100 100 200 300 400 500 V OS (µV)
6258 G03
V S = ±2.5V V CM =0V HGRADE IND DISTRIBUTION (µV/°C) NUMBER OF UNITS
6258 G04
V CM = 0.4V SUPPL Y VOL TAGE (V) 1.8 2.4 3.0 3.6 4.2 4.8 5.4 –200 –160 –120 –80 –40 120 160 200 V OS (µV)
6258 G05
V S = 5V V CM (V) –0.5 0.5 1.5 2.5 3.5 4.5 5.5 –500 –400 –300 –200 –100 100 200 300 400 500 V OS (µV)
6258 G06
V S = ±2.5V V CM = 0V –40°C 25°C 125°C I OUT (mA) –0.8 –0.6 –0.4 –0.2 0.2 0.4 0.6 0.8 1.0 VOS (mV)
6258 G07
V S = 5V +IN –IN V CM (V) 0.5 1.5 2.5 3.5 4.5 –20 –16 –12 INPUT BIAS CURRENT (nA)
6258 G08
V S = 1.8V +IN –IN V CM (V) 0.3 0.6 0.9 1.2 1.5 1.8 –20 –16 –12 INPUT BIAS CURRENT (nA)
6258 G09
6258960fa For more information www.linear .com/L TC6258 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Temperature Per Channel Output Saturation Voltage vs Load Current Output Saturation Voltage vs Load Current Output Short-Circuit Current vs Supply Voltage (Sourcing) Output Short-Circuit Current vs Supply Voltage (Sinking) 0.1Hz to 10Hz Output Voltage Noise Input Bias Current vs Supply Voltage Input Bias Current vs Temperature Supply Current vs Supply Voltage per Channel V CM = 0.4V +IB (nA) –IB (nA) SUPPL Y VOL TAGE (V) 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 –10 INPUT BIAS CURRENT (nA)
6258 G10
V S = ±2.5V +IB, V CM = 2V –IB, V CM = 2V +IB, V CM = –2V –IB, V CM = –2V TEMPERATURE (°C) –40 –25 –10 110 125 –20 –15 –10 INPUT BIAS CURRENT (nA)
6262 G11
V S = 5V V CM = 0.4V 25°C –40°C 125°C SUPPL Y VOL TAGE (V) 0.5 1.5 2.5 3.5 4.5 SUPPL Y CURRENT (uA)
6258 G12
V CM = 0.4V VS = 5V VS = 1.8V TEMPERATURE (°C) –50 –20 100 130 SUPPL Y CURRENT (µA)
6258 G13
–40°C/5V 25°C/5V 85°C/5V 125°C/5V –40°C/1.8V 25°C/1.8V 85°C/1.8V 125°C/1.8V LOAD CURRENT (mA) 0.5 1.5 –350 –300 –250 –200 –150 –100 –50 SATURATION VOL TAGE FROM TOP RAIL (mV)
6258 G14
–40°C/5V 25°C/5V 85°C/5V 125°C/5V –40°C/1.8V 25°C/1.8V 85°C/1.8V 125°C/1.8V LOAD CURRENT (mA) 0.5 1.5 100 150 200 250 300 350 SATURATION VOL TAGE FROM BOTTOM RAIL (mV)
6258 G15
V CM = 0.4V 25°C 125°C –40°C SUPPL Y VOL TAGE (V) 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 MAXIMUM SOURCING CURRENT (mA)
6258 G16
V CM = 0.4V SUPPL Y VOL TAGE (V) 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 MAXIMUM SINKING CURRENT (mA)
6259 G17
25°C 125°C –40°C V S = ±2.5V V CM = 0.4V A V = 1 TIME (s) NOISE VOL TAGE (µV)
6258 G18
9For more information www.linear .com/L TC6258 TYPICAL PERFORMANCE CHARACTERISTICS Total Harmonic Distortion and Noise Total Harmonic Distortion and Noise Gain and Phase vs Frequency Noise Voltage Density vs Frequency Input Referred Current Noise vs Frequency Slew Rate vs Supply Voltage Common Mode Rejection Ratio vs Frequency Power Supply Rejection Ratio vs Frequency V S = ±2.5V V CM = 0V FREQUENCY (Hz) 100 10k 100k 100 150 200 250 300 350 400 450 500 INPUT REFERRED VOL TAGE NOISE (nV/√Hz)
6258 G19
V S = 2.5V V CM = 0V FREQUENCY (MHz) 0.1 0.01 0.1 INPUT REFERRED CURRENT NOISE (pA/√Hz)
6258 G20
V S = ±0.9V V CM = 0V A V = 2 RG = RF = 10kΩ 1kHz 500Hz V OUTP–P (V) 0.01 0.1 0.01 0.1 THD+N (%)
6259 G21
V S = ±2.5V V CM = 0V A V = 2 RG = RF = 10kΩ 1kHz 500Hz V OUTP-P (V) 0.01 0.1 0.01 0.1 THD+N (%)
6258 G23
VS = ±2.5V V CM = 0V GAIN PHASE FREQUENCY (Hz) 10k 100k 10M –50 –40 –30 –20 –10 GAIN (dB) PHASE V STEP = V S – 1V A V = –1 R G F = 10kΩ RISING FALLING SUPPL Y VOL TAGE (V) 1.8 2.6 3.4 4.2 0.1 0.2 0.3 0.4 0.5 SLEW RATE (V/µs)
6258 G24
VS = 5V VCM = ±2.5V V CM = 0V FREQUENCY (Hz) 10k 100k 10M 100 CMRR (dB)
6258 G25
V S = 5V V CM = 0.4V FREQUENCY (Hz) 100 10k 100k 10M 100 PSRR (dB)
6258 G26
V S = ±2.5V V CM = 0V A V = 1 V IN = ±2V CAPACITIVE LOAD (nF) 0.01 0.1 100 OVERSHOOT (%)
6258 G27
Overshoot vs Capacitive Load
6258960fa For more information www.linear .com/L TC6258 TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Response Small-Signal Response Electromagnetic Interference Rejection Ratio Large-Signal Response Supply Current vs SHDN Pin Voltage Supply Current vs SHDN Pin Voltage Large-Signal Response Output Impedance vs Frequency V S = ±2.5V A V = 1 R LOAD = 100kΩ 10pF 100pF 1nF 10nF 100nF TIME (µs) 200 400 600 800 1000 –2.5 –2.0 –1.5 –1.0 –0.5 0.5 1.0 1.5 2.0 2.5 VOL TAGE (V)
6258 G28
V S = ±2.5V A V = 1 R LOAD = 100kΩ CLOAD = 10pF CLOAD = 100pF CLOAD = 1nF CLOAD = 10nF CLOAD = 100nF TIME (µs) 200 400 600 800 1000 –50 –40 –30 –20 –10 VOL TAGE (mV)
6259 G30
V S = ±0.9V A V = 1 R LOAD = 100kΩ CLOAD = 10pF CLOAD = 100pF CLOAD = 1nF CLOAD = 10nF CLOAD = 100nF TIME (µs) 200 400 600 800 1000 –1.0 –0.8 –0.6 –0.4 –0.2 0.0 0.2 0.4 0.6 0.8 1.0 VOL TAGE (V)
6258 G30
V S = ±0.9V A V = 1 R LOAD = 100kΩ CLOAD = 10pF CLOAD = 100pF CLOAD = 1nF CLOAD = 10nF CLOAD = 100nF TIME (µs) 200 400 600 800 1000 –50 –40 –30 –20 –10 VOL TAGE (mV)
6258 G31
V S = ±2.5V V CM = 0V AV = 10 AV = 1 FREQUENCY (kHz) 0.01 0.1 0.1 100 10k OUTPUT IMPEDANCE (Ω)
6258 G32
V S = 5V V CM = 0.4V TA = 125°C TA = 25°C TA = –40°C V SHDN (V) 0.4 0.8 1.2 1.6 SUPPL Y CURRENT (µA)
6258 G33
V S = 1.8V V CM = 0.4V TA = 125°C TA = 25°C TA = –40°C V SHDN (V) 0.4 0.8 1.2 1.6 SUPPL Y CURRENT (µA)
6258 G34
V S = 2.5V V CM = 0V INPUT POWER = –10dBm +IN –IN FREQUENCY (MHz) 100 1000 10000 100 EMI REJECTION RATIO (dB)
6258 G35
11For more information www.linear .com/L TC6258 PIN FUNCTIONS –IN: Inverting Input of the Amplifier . Voltage range of this pin can go from V– – 0.1V to V+ + 0.1V . +IN: Noninverting Input of Amplifier . This pin has the same voltage range as –IN. V +: Positive Power Supply. Typically the voltage is from 1.8V to 5.25V . Split supplies are possible as long as the voltage between V+ and V– is between 1.8V and 5.25V . A bypass capacitor of 0.1µF as close to the part as possible should be used between power supply pins or between supply pins and ground. V –: Negative Power Supply. It is normally tied to ground. It can also be tied to a voltage other than ground as long as the voltage between V + and V– is from 1.8V to 5.25V . If it is not connected to ground, bypass it with a capacitor of 0.1µF as close to the part as possible. SHDN: Active Low Shutdown. Shutdown threshold is 0.6V above negative rail. If left unconnected, the amplifier will be on. OUT: Amplifier Output. Rail-to rail amplifier output capable of delivering 4mA.
Figure 1. L TC6258/L TC6259/L TC6260 Simplified Schematic
6258960 F01
13For more information www.linear .com/L TC6258 OPERATION The L TC6258 family input signal range extends beyond the negative and positive power supplies. Figure 1 depicts a Simplified Schematic of the amplifier . The input stage is comprised of two differential amplifiers, a PNP stage Q1/ Q2 and NPN stage Q3/Q4 that are active over different ranges of common mode input voltage. The PNP stage is active between the negative power supply to approxi - mately 1V below the positive supply. As the input voltage approaches the positive supply, transistor Q5 will steer the tail current I 1 to the current mirror Q6/Q7, activating the NPN differential pair and the PNP pair becomes inactive for the remaining input common mode range. Also for the input stage, devices Q17, Q18 and Q19 act to cancel the bias current of the PNP input pair . When Q1/Q2 is active, the current in Q16 is controlled to be the same as the current Q1/Q2. Thus, the base current of Q16 is normally equal to the base current of the input devices of Q1/Q2. Similar circuitry (not shown) is used to cancel the base current of Q3/Q4. The buffer and output bias stage uses a special compensation technique to take full advantage of the process technology to drive high capacitive loads. The common emitter topology of Q14/Q15 enables the output to swing from rail to rail.
6258960fa For more information www.linear .com/L TC6258 APPLICATIONS INFORMATION Low Supply Voltage and Low Power Consumption The L TC6258 family of operational amplifiers can oper - ate with power supply voltages from 1.8V to 5.25V . Each amplifier draws 20µA. The low supply voltage capability and low supply current are ideal for portable applications. High Capacitive Load Driving Capability and Wide Bandwidth The L TC6258 family is optimized for wide bandwidth low power applications. They have a high gain-bandwidth to power ratio and are unity gain stable. When the load capacitance increases, the increased capacitance at the output pushes the non-dominant pole to lower frequency in the open loop frequency response, worsening the phase and gain margin. The L TC6258 family are designed to directly drive up to 100nF of capacitive load in unity gain configuration (see Typical Performance Characteristics, Capacitive Load Handling). Low Input Referred Noise The L TC6258 family provides a low input referred noise of 38nV/√Hz at 1kHz. The average noise voltage density over a 100kHz bandwidth is less than 80nV/√Hz. The L TC6258 family is ideal for low noise and low power signal process- ing applications. Low Input Offset Voltage The L TC6258 family has a low offset voltage of 400μV , which is essential for precision applications. The offset voltage is trimmed with a proprietary trim algorithm to ensure low offset voltage over the entire common mode voltage range. Low Input Bias Current The L TC6258 family uses a bias current cancellation circuit to compensate for the base current of the input transistors. When the input common mode voltage is within 200mV of either rail, the bias cancellation circuit is no longer active. For common mode voltages ranging from 0.2V above the negative supply to 0.2V below the positive supply, the low input bias current allows the amplifiers to be used in applications with high resistance sources. Ground Sensing and Rail to Rail Output The L TC6258 family delivers over 4mA of output drive current. The output stage is a rail-to-rail topology that is capable of swinging to within 300mV of either rail. If output swing to the negative rail is required, an external pull down resistor to a negative supply can be added. For 5V/0V op amp supplies, a pull down resistor of 10k to –2V will allow a ‘true zero’ output swing. In this case, the output can swing all the way to the bottom rail while maintaining 45dB of open loop gain. Since the inputs can go 100mV beyond either rail, the op amp can easily perform ‘true ground’ sensing. The maximum output current is a function of total supply voltage. As the supply voltage to the amplifier increases, the maximum output current also increases. Attention must be paid to keep the junction temperature of the IC below 150°C when the output is in continuous short-circuit. The output of the amplifier has reverse-biased diodes con - nected to each supply. The output should not be forced more than 0.5V beyond either supply, other wise current will flow through these diodes. EMI Rejection Electromagnetic interference (EMI) rejection is built into the L TC6258 op amp family. Rejection is measured by injecting 200mV P-P (–10dBm) RF signal into the pins and measuring the offset change (delta_VOS). The rejection ratio is calculated as 20log (100mV/delta_VOS). Input Protection and Output Overdrive To prevent breakdown of the input transistors, the input stages are protected against a large differential input voltage by two pairs of back-to-back diodes, D5 to D8. If the differential input voltage exceeds 1.4V , the current in these diodes must be limited to less than 10mA. These amplifiers are not intended for open loop applications such as comparators. When the output stage is overdriven, internal limiting circuitry is activated to improve overdrive recovery. In some applications, this circuitry may draw as much as 1mA supply current.
15For more information www.linear .com/L TC6258 ESD The L TC6258 family has reverse-biased ESD protection diodes on all inputs and output as shown in Figure 1. Supply Voltage Ramping Fast ramping of the supply voltage can cause a current glitch in the internal ESD protection circuits. Depending on the supply inductance, this could result in a supply volt- age transient that exceeds the maximum rating. A supply voltage ramp time of greater than 1ms is recommended. Feedback Components Care must be taken to ensure that the pole formed by the feedback resistors and the parasitic capacitance at the inverting input does not degrade stability. For example, in a gain of +2 configuration with gain and feedback resis - tors of 100k, a poorly designed circuit board layout with parasitic capacitance of 5pF (part +PC board) at the ampli- fier’s inverting input will cause the amplifier to oscillate due to a pole formed at 640kHz. An additional capacitor of 4.7pF across the feedback resistor as shown in Figure 2 will eliminate any ringing or oscillation. Shutdown The single and dual versions have package options with SHDN pins that can shut down the amplifier to less than 7µA supply current. The SHDN pin voltage needs to be within 0.6V of V – for the amplifier to shut down. During shutdown, the output is in a high output impedance state. When left floating, the SHDN pin is internally pulled up to the positive supply and the amplifier remains enabled. 100k 100k 4.7pF CPAR VOUT VIN 6258960 F02 L TC6258 Figure 2. Figure 3a. 10kHz Bandpass Filter Figure 3b. Frequency Response of 10kHz Bandpass Filter of Figure 3a APPLICATIONS INFORMATION 4.7nF 4.7nF 21k 4.7nF 562/uni03A9 RA1 499k
6258 F03a
1µF 10k 10kIN OUT CD2 0.1µF L T6259 5dB/DIV 5dB –45dB
6258 F03b
The bandpass filter Figure 3a is AC-coupled to an input. As a result, L TC6259 input does not place a burden on the previous stage to develop an absolute common mode voltage. A simple resistor divider with RA1 and RA2 provides biasing for the L TC6259 inputs. Pegging the op amp inputs to a fixed voltage helps to reduce distortion that might arise with moving common mode. This filter is centered at 10kHz. The exact resistance and capacitance values can be tweaked upwards or downwards, depending on whether lowest resistor noise or lowest total supply current is more important.
6258960fa For more information www.linear .com/L TC6258 Figure 4b. Low Power Sine Generator Figure 4c. FFT Figure 4a. Low Power Squarewave - Sinewave Oscillator APPLICATIONS INFORMATION Low Power Sine Wave Generator A low power sine wave generator can be derived by driving a square wave into the bandpass filter . A complete schematic is shown in Figure 4a. The L TC6992-1 easily configures as a 50% duty cycle 10kHz square wave, and can drive the relatively benign loading seen in the bandpass filter . Figures 4b and 4c show the L TC6992-1 output and bandpass filter output. THD of the sine wave is –30.5 dBc. Note, even harmonics that appear in the distortion products of the filtered output already appear in the source square wave. Low Noise Reference The L T6656 is a 1µA precision series voltage reference. Yet with low power comes low drive current capability and higher noise. The L TC6259 can be used as a buf - fer that follows a filter to enhance the utilization of the LT6656 in low power applications. Figure 5a shows such a configuration. First a very low cutoff frequency follows the L T6656 output (RIN1 and CIN1, lower than 5Hz cutoff). Choice of filter resistor RIN1 is such that the bias current in the L TC6259, multiplied by the resistance value, is lower than the nominal offset voltage of the op amp. C IN1 can be larger or smaller , with more or less filtering accord - ingly. The voltage withstanding requirement of CIN1 is low, resulting in large capacitance in a small volume. 4.7nF 4.7nF 21k 4.7nF 154k 182k 976k 0.1µF154k 562/uni03A9 499k
6258 F04a
499k1µF 10k 10k MOD L TC6992-1 GND SET OUT DIV OUT 0.1µF L T6258 +V+ 50µs/Div 1.0 2.0 3.0 4.0 5.0 L TC6992–1 OUTPUT (V)
6258 F04b
FREQUENCY (kHz) 100 –120 –100 –80 –60 –40 –20 AMPLITUDE (dB)
6258 F04c
17For more information www.linear .com/L TC6258 APPLICATIONS INFORMATION V+ OUT L TC6258
6258960 F05a
22µF 22µF RIN1 2.7k 22µF IN OUT GND L T6656 Figure 5a. Low Noise Reference Use L T6656 for a Low Current Starting Reference Figure 5b. Noise Density, Reference Buffer Figure 5c. Reference Buffer T ransient Response * 2.7k + 22µF FIL TER OP AMP , 44µF CLOAD OP AMP FIL TERED REFERENCE REFERENCE OUTPUT INSTRUMENT ONL Y FREQUENCY (kHz) 0.01 0.1 100 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 NOISE DENSITY (nVrms/rt(Hz))
6258 F05b
This circuit takes advantage of the ability of the L TC6259 to drive large capacitive loads. Use of a large output capacitor attached to the L T6659 enables significant bypassing of follow-on circuits that use the reference voltage. In total, the combination of L T6656 and L TC6259, in this configuration, develops a reference voltage, with low noise, at low power , and with appreciably large available bypass capacitance. Voltage spectral noise densities are shown in Figure 5b. Larger noise from the reference below 10kHz noticeably drops down once a filter (R IN1 and CIN1) follow the refer- ence. The op amp, configured in unity gain, with a large 44µF load, remains stable and contributes only a small amount of low frequency noise. Figure 5c shows the tran- sient response of the combination of R IN1-CIN1 filter and op amp circuit, with and without the 44µF output capacitor . Figure 5c shows the time domain response of the refer - ence buffer . The total measured supply current consumption is 21µA. Analog LED Control Figure 6a shows a voltage controlled LED drive cir cuit. When VIN is at 0V , the op amp supply current is nominally 20μA. The offset, for example, could be 450µV , appears across R1, inducing a 0.45mA current in the LED. Some applications want a guaranteed zero LED current at V IN = 0, and this is the purpose of R5. R5 forces 2.5μA current through R7, creating a negative 0.6mV sense offset. This offset guarantees a zero LED current. INPUT NO 44µF OUTPUT CAP ADD 44µF OUTPUT CAP 200ms/Div 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VOL TS (V)
6258 F05c
6258960fa For more information www.linear .com/L TC6258 APPLICATIONS INFORMATION Figure 6a. Lower Power LED Driver with Voltage Command Figure 6b. LED Current D 2N7002 1/uni03A9 100k 237/uni03A9 51/uni03A9 L TC6258 2.2k 97.6k V IN 100nF
6258 F06a
V G Indeed, the circuit works nicely. Once the input voltage is near 0, the LED current output is 0 and the total supply current is 20µA. Gain from the input voltage to LED cur- rent is 0.022A/V , as can be taken from the R2/R3 voltage divider and the sense resistor value. LED Current= VIN R1 R3 R2+R3 Self-Oscillating LED Driver Taking the cir cuit of the above application a step further , the circuit of Figure 7a combines edge detection with use of the shutdown pin of the L TC6259. R2 and R3 bring in a divided down copy of the supply voltage as a reference into the positive terminal. The op amp forces this voltage on the sense resistor R SENSE in “LED ON” operation. In that sense this circuit is similar to the one above. 20 µA SUPPL Y WHEN LED OFF MEASURED CALCULATED INPUT VOL TAGE (V) 100 LED CURRENT (mA)
6258 F06b
However , whereas the previous circuit assumes an always-on operation mode, this new circuit hijacks the shutdown pin. C2 can AC couple fast action signals into the signal V C. Hence when the gate voltage VG increases when “LED ON” begins, VC will suddenly rise. VC connects to the shutdown pin; a rising edge on the shutdown pin enables the L TC6259, which is already active, to stay on. However , M3 is also on while M1 is on, and as a result will work with R9 to charge C2 slowly until V C falls below the shutdown threshold. At that moment, the active low shutdown kicks in, and the L TC6259 turns off. A negative falling V G voltage again feeds through C2, and a falling VC and hence a falling shutdown pin voltage keeps the circuit in an “LED OFF” state for some time. M3 turns off, and C2 discharges until V C is high enough to reactivate the L TC6259. It may seem a bit odd to develop such a circuit when a microprocessor or a L TC6992 can provide on-off capabil- ity in combination with a single MOSFET and resistor . The problem with those circuits, however , is the lack of control over the LED current. In the circuit of this application, a voltage is controlled across a sense resistor . There is no dependence on the LED voltage in how much current drives the LED. And generation of the on-off, or blinking, comes with the addition of only a handful of low cost components.
19For more information www.linear .com/L TC6258 APPLICATIONS INFORMATION It is interesting to note that the LED current depends on the supply in this implementation in as much as the supply feeds through R2 and R3 to create a reference. The supply also figures into the time of the on and off cycle since the supply powers the edge detection and relaxation part of the circuitry. When the supply falls, the LED current drops and the cycle time increases. This change of behavior can help in battery powered LED blinking applications to predict end of life. The figure shows the sense resistor voltage (red) and the shutdown pin voltage (blue). The shutdown voltage is tied to V C; the gate drive couples through C2 as already described. Components RF and CF may apparently slow edges down greatly. Adding this much delay is not essential, but it can help to smooth out any hiccups that occur when the part goes through a startup sequence after the shutdown pin goes inactive. 47µs as a time constant is insignificant in the time scale of the blinking (10’s or 100’s of ms). The 47µs is much smaller than any time constant associated with C2 and its resistors. VG VG VC VC 51/uni03A9 2N7002 LED D RSENSE 10/uni03A9 275k 15k 1nF 1µF RGATE 10k 2N7002
6258 F07a
Figure 7a. LED Driver with Self-Oscillation Figure 7b. LED Blinker Circuit 50ms/Div –60.0 60.0 120.0 180.0 240.0 300.0 –2.0 –1.0 1.0 2.0 3.0 4.0 SENSE RESISTOR VOL TAGE (mV) SHUTDOWN PIN VOL TAGE (V)
6258 F07b
6258960fa For more information www.linear .com/L TC6258 PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/L TCL TC6258#packaging for the most recent package drawings. 1.50 – 1.75 (NOTE 4)2.80 BSC 0.30 – 0.45
6 PLCS (NOTE 3)
DATUM ‘A’ 0.09 – 0.20 (NOTE 3) S6 TSOT-23 0302
2.90 BSC
(NOTE 4)
0.95 BSC
1.90 BSC
0.80 – 0.90
1.00 MAX
0.01 – 0.100.20 BSC 0.30 – 0.50 REF PIN ONE ID NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193
3.85 MAX
0.62 MAX 0.95 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 1.4 MIN2.62 REF
1.22 REF
(Reference LTC DWG # 05-08-1636)
21For more information www.linear .com/L TC6258 PACKAGE DESCRIPTION 1.50 – 1.75 (NOTE 4)2.80 BSC 0.22 – 0.36
8 PLCS (NOTE 3)
DATUM ‘A’ 0.09 – 0.20 (NOTE 3) TS8 TSOT-23 0710 REV A (NOTE 4)
0.65 BSC
1.95 BSC
0.80 – 0.90 0.01 – 0.100.20 BSC 0.30 – 0.50 REF PIN ONE ID NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 0.40 MAX 0.65 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 1.4 MIN2.62 REF (Reference L TC DWG # 05-08-1637 Rev A) Please refer to http://www.linear .com/product/L TC6259#packaging for the most recent package drawings.
6258960fa For more information www.linear .com/L TC6258 PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/L TC6259#packaging for the most recent package drawings. MSOP (MS8) 0213 REV G 0.53 ±0.152 (.021 ±.006) SEATING PLANE NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.18 (.007) 0.254 (.010) 1.10 (.043) MAX 0.22 – 0.38 (.009 – .015) TYP 0.1016 ±0.0508 (.004 ±.002) 0.86 (.034) REF 0.65 (.0256) BSC 0° – 6° TYP DETAIL “A” DETAIL “A” GAUGE PLANE 1 2 3 4 4.90 ±0.152 (.193 ±.006) 8 7 6 5 3.00 ±0.102 (.118 ±.004) (NOTE 3) 3.00 ±0.102 (.118 ±.004) (NOTE 4) 0.52 (.0205) REF 5.10 (.201) MIN 3.20 – 3.45 (.126 – .136) 0.889 ±0.127 (.035 ±.005) RECOMMENDED SOLDER PAD LAYOUT 0.42 ± 0.038 (.0165 ±.0015) TYP 0.65 (.0256) BSC 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev G)
23For more information www.linear .com/L TC6258 PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/L TC6259#packaging for the most recent package drawings. MSOP (MS) 0213 REV F 0.53 ±0.152 (.021 ±.006) SEATING PLANE 0.18 (.007) 1.10 (.043) MAX 0.17 –/uni00A00.27 (.007 – .011) TYP 0.86 (.034) REF 0.50 (.0197) BSC 1 2 3 4 5 4.90 ±0.152 (.193 ±.006) 0.497 ±0.076 (.0196 ±.003) REF8 9 107 6 3.00 ±0.102 (.118 ±.004) (NOTE 3) 3.00 ±0.102 (.118 ±.004) (NOTE 4) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.254 (.010) 0° – 6° TYP DETAIL “A” DETAIL “A” GAUGE PLANE 5.10 (.201) MIN 3.20 – 3.45 (.126 – .136) 0.889 ±0.127 (.035 ±.005) RECOMMENDED SOLDER PAD LAYOUT 0.305 ±0.038 (.0120 ±.0015) TYP 0.50 (.0197) BSC 0.1016 ±0.0508 (.004 ±.002) 10-Lead Plastic MSOP (Reference LTC DWG # 05-08-1661 Rev F)
6258960fa For more information www.linear .com/L TC6258 PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/L TC6260#packaging for the most recent package drawings. MSOP (MS16) 0213 REV A 0.53 ±0.152 (.021 ±.006) SEATING PLANE 0.18 (.007) 1.10 (.043) MAX 0.17 –/uni00A00.27 (.007 – .011) TYP 0.86 (.034) REF 0.50 (.0197) BSC 16151413121110 1 2 3 4 5 6 7 8 NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.254 (.010) 0° – 6° TYP DETAIL “A” DETAIL “A” GAUGE PLANE 5.10 (.201) MIN 3.20 – 3.45 (.126 – .136) 0.889 ±0.127 (.035 ±.005) RECOMMENDED SOLDER PAD LAYOUT 0.305 ±0.038 (.0120 ±.0015) TYP 0.50 (.0197) BSC 4.039 ±0.102 (.159 ±.004) (NOTE 3) 0.1016 ±0.0508 (.004 ±.002) 3.00 ±0.102 (.118 ±.004) (NOTE 4) 0.280 ±0.076 (.011 ±.003) REF 4.90 ±0.152 (.193 ±.006) 16-Lead Plastic MSOP (Reference L TC DWG # 05-08-1669 Rev A)
25For more information www.linear .com/L TC6258 PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/L TC6258#packaging for the most recent package drawings. 2.00 ±0.10 (4 SIDES) NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WCCD-2) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.40 ±0.10 BOTTOM VIEW—EXPOSED PAD 0.60 ±0.10 (2 SIDES) 0.75 ±0.05 R = 0.125 TYP R = 0.05 TYP 1.37 ±0.10 (2 SIDES) 6 4 PIN 1 BAR TOP MARK (SEE NOTE 6)
0.200 REF
0.00 – 0.05 (DC6) DFN REV C 0915 0.25 ±0.05
0.50 BSC
0.25 ±0.05 1.37 ±0.10 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 0.60 ±0.10 (2 SIDES)1.15 ±0.05 0.70 ±0.05 2.55 ±0.05 PACKAGE OUTLINE R = 0.20 OR 0.25 × 45° CHAMFER 6-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1703 Rev C)
6258960fa For more information www.linear .com/L TC6258 PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/L TC6259#packaging for the most recent package drawings. 2.00 ±0.10 (4 SIDES) NOTE: 1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.40 ±0.10 BOTTOM VIEW—EXPOSED PAD 0.64 ±0.10 (2 SIDES) 0.75 ±0.05 R = 0.115 TYP R = 0.05 TYP 1.37 ±0.10 (2 SIDES) PIN 1 BAR TOP MARK (SEE NOTE 6) 0.00 – 0.05 (DC8) DFN 0409 REVA 0.23 ±0.05
0.45 BSC
0.25 ±0.05 1.37 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED 0.64 ±0.05 (2 SIDES)1.15 ±0.05 0.70 ±0.05 2.55 ±0.05 PACKAGE OUTLINE R = 0.20 OR 0.25 × 45° CHAMFER 8-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1719 Rev A)
27For more information www.linear .com/L TC6258 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However , no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER A 04/17 Added SOT-23 package. 1, 2, 3, 20
6258960fa For more information www.linear .com/L TC6258 LINEAR TECHNOLOGY CORPORATION 2017 LT 0417 REV A • PRINTED IN USA www.linear.com/LTC6258 TYPICAL APPLICATION RELATED PARTS PART NUMBER DESCRIPTION COMMENTS L TC6255/L TC6256/ L TC6257 6.5MHz, 65µA Power Efficient RR Op Amp 6.5MHz, 65µA, RR IN/OUT , 1.8V to 5.25V L TC6261/L TC6262/ L TC6263 30MHz, 240µA Power Efficient RR Op Amp 30MHz, 240µA, RR IN/OUT , 1.8V to 5.25V L TC6246/L TC6247/ L TC6248 180MHz, 1mA, Power Efficient Rail-to-Rail Op Amps 180MHz GBW , 1mA, 500μV V OS, RR In/Out, 2.5V to 5.25V , 90V/µs Slew Rate LT1498/L T1499 10MHz, 6V/µs, Dual/Quad,Rail-to-Rail Input and Output, Precision C-Load Op Amps 10MHz GBW , 1.7mA, 475μV V OS, RR In/Out, 2.2V to ±15V , 10nF CLOAD L TC6081/L TC6082 Precision Dual/Quad CMOS Rail-to-Rail Input/Output Amplifiers 3.6MHz GBW , 330μA, 70μV V OS, RR In/Out, 2.7V to 5.5V , 100dB CMRR L TC2050/L TC2051/ L TC2052 Zero-Drift Operational Amplifiers in SOT-23 3MHz GBW , 800μA, 3μV V OS, V– to V+ – 1V In, RR Out, 2.7V to 6V , 130dB CMRR/PSRR L TC1050/L TC1051/ L TC1052 Precision Zero-Drift, Operational Amplifierwith Internal Capacitors 2.5MHz GBW , 1mA, 5μV V OS, V– to V+ – 2.3V In, RR Out, 4.75V to 16V , 120dB CMRR, 125dB PSRR L TC6084/L TC6085 Dual/Quad 1.5MHz, Rail-to-Rail, CMOS Amplifiers 1.5MHz GBW , 110μA, 750μV V OS, RR In/Out, 2.5V to 5.5V L T1783 1.25MHz, Over-The-Top® Micropower , Rail-to-Rail Input and Output Op Amp in SOT-23 1.25MHz GBW , 300μA, 800μV VOS, RR In/Out, 2.5V to 18V L T1637/L T1638/ L T1639 1.1MHz, 0.4V/μs Over-The-Top Micropower , Rail-to-Rail Input and Output Op Amps 1.1MHz GBW , 250μA, 350μV V OS, RR In/Out, 2.7V to 44V , 110dB CMRR L TC2054/L TC2055 Single/Dual Micropower Zero-Drift Operational Amplifiers 500kHz GBW , 150μA, 3μV V OS, V– to V+ – 0.5V In, RR Out, 2.7V to 6V L T6010/L T6011/ L T6012 135μA, 14nV/√Hz, Rail-to-Rail Output Precision Op Amp with Shutdown 330kHz GBW , 135μA, 35μV V OS, V– + 1.0V to V+ – 1.2V In, RR Out, 2.7V to 36V LT1782 Micropower , Over-The-Top, SOT-23, Rail-to-Rail Input and Output Op Amp 200kHz GBW , 55μA, 800μV VOS, RR In/Out, 2.5V to 18V L T1636 Over-The-Top, Micropower Rail-to-Rail, Input and Output Op Amp 200kHz GBW , 50μA, 225μV V OS, RR In/Out, 2.7V to 44V , –40°C to 125°C L T1490A/L T1491A Dual/Quad Over-The-Top, Micropower Rail-to-Rail Input and Output Op Amps 200kHz GBW , 50μA, 500μV V OS, RR In/Out, 2V to 44V L T2178/L T2179 17μA Max, Dual and Quad, Single Supply, Precision Op Amps 85kHz GBW, 17μA, 70μV V OS, RR In/Out, 5V to 44V L T6000/L T6001/ L T6002 Single, Dual and Quad, 1.8V , 13μA Precision Rail-to-Rail Op Amps 50kHz GBW , 16μA , 600μV V OS(MAX), RR In/Out, 1.8V to 18V VG VG VC VC 51/uni03A9 2N7002 LED D RSENSE 10/uni03A9 275k 15k 1nF 1µF RGATE 10k 2N7002
6258 TA03
–60.0 60.0 120.0 180.0 240.0 300.0 –2.0 –1.0 1.0 2.0 3.0 4.0 SENSE RESISTOR VOL TAGE (mV) SHUTDOWN PIN VOL TAGE (V)
6258 TA04
LED Driver with Self Oscillation LED Blinker Current