LT1784 LINER
Document overview
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Technical content
n Operates with Inputs Above V+ n Rail-to-Rail Input and Output n Low Profile (1mm) ThinSOT TM Package n Gain Bandwidth Product: 2.5MHz n Slew Rate: 2.1V/ms n Low Input Offset Voltage: 3.5mV Max n High Voltage Gain: 1000V/mV n Single Supply Input Range: 0V to 18V n Specified on 3V, 5V and –5V Supplies n Reverse Battery Protection to 18V n Low Power: 750mA Supply Current Max n Output Shutdown on 6-Lead Version n High Output Current: 15mA Min n Operating Temperature Range: – 40°C to 85°C The LT 1784 is a 2.5MHz op amp available in the small SOT-23 package that operates on all single and split supplies with a total voltage of 2.5V to 18V. The amplifier draws less than 750 mA of quiescent current and has reverse battery protection, drawing negligible current for reverse supply voltages up to 18V. The input range of the LT1784 includes ground, and a unique feature of this device is its Over-The-Top TM opera- tion capabilitity with either or both of its inputs above the positive rail. The inputs handle 18V both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs from occurring even when the inputs are 9V below the negative supply. The LT1784 can drive loads up to 15mA and still maintain rail-to-rail capability. A shutdown feature on the 6-lead version can disable the part, making the output high impedance and reducing quiescent current to 5 mA. The LT1784 op amp is available in the 5- and 6-lead SOT-23 packages. For applications requiring lower power, refer to the LT1782 and LT1783 data sheets. n Portable Instrumentation n Battery-Powered Systems n Sensor Conditioning n Supply Current Sensing n MUX Amplifiers n 4mA to 20mA Transmitters 2.5MHz, Over-The-Top Low Power, Rail-to-Rail Input and Output Op Amp in SOT-23 , LTC and LT are registered trademarks of Linear Technology Corporation. Over-The-Top and ThinSOT are trademarks of Linear Technology Corporation. LT1782 VCCSHDN IN OUT
1784 TA01
9.09k 10k LT1784 VCC VCC AV = 2AV = 20 SHDN VEE ()AV = 1+ R1 + R2 ()OR 1+ R1 R2 + R3 Programmable Gain, AV = 2, AV = 20, 100kHz Amplifier FREQUENCY (Hz) GAIN (dB) –10 –15 –20 1k 100k 1M 10M
1784 TA01a
AV = 20 AV = 2 Programmable Gain Amplifier Frequency Response
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOS Input Offset Voltage T A = 25°C 1.5 3.5 mV 0°C £ TA £ 70°C l 4.2 mV –40 °C £ TA £ 85°C l 4.5 mV DVOS/DT Input Offset Voltage Drift (Note 7) –40 °C £ TA £ 85°C l 51 5 mV/°C IOS Input Offset Current l 25 50 nA VCM = 18V (Note 3) l 50 mA IB Input Bias Current l 250 500 nA VCM = 18V (Note 3) l 225 400 mA SHDN or VS = 0V, VCM = 0V to 18V 0.1 nA DIB/DT Input Bias Current Drift –40 °C £ TA £ 85°C l 0.4 nA/ °C Input Noise Voltage 0.1Hz to 10Hz 1.5 mVP-P en Input Noise Voltage Density f = 10kHz 25 nV/ ÖHz in Input Noise Current Density f = 10kHz 0.3 pA/ ÖHz RIN Input Resistance Differential 100 200 k W Common Mode, VCM = 0V to (VCC – 1.2V) 150 M W Common Mode, VCM = 0V to 18V 45 80 k W CIN Input Capacitance 5p F VCM Input Voltage Range l 01 8 V LT1784CS5 LT1784IS5 TJMAX = 150°C, qJA = 250°C/ W ORDER PART NUMBER (Note 1)ABSOLUTE MAXIMUM RATINGSW WW U PACKAGE/ORDER INFORMATIONW UU
ELECTRICAL CHARACTERISTICS
The l denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. Operating Temperature Range (Note 10) – 40°C to 85°C Specified Temperature Range (Note 11) – 40 °C to 85°C ORDER PART NUMBER TJMAX = 150°C, qJA = 230°C/ W S5 PART MARKING S6 PART MARKING
1 OUT
+IN –IN TOP VIEW S5 PACKAGE 5-LEAD PLASTIC SOT-23 2 + – TOP VIEW S6 PACKAGE 6-LEAD PLASTIC SOT-23 OUT +IN SHDN –IN + – LTJD LTSN LT1784CS6 LT1784IS6 LTIW LTIX Consult LTC marketing for parts specified with wider operating temperature ranges.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS The l denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. CMRR Common Mode Rejection Ratio V CM = 0V to VCC – 1.2V l 84 95 dB (Note 3) V CM = 0V to 18V (Note 6) l 60 70 dB PSRR Power Supply Rejection Ratio V S = 3V to 12.5V, VCM = VO = 1V l 90 100 dB AVOL Large-Signal Voltage Gain V S = 3V, VO = 500mV to 2.5V, RL = 10k 133 1000 V/mV VS = 3V, 0°C £ TA £ 70°C l 90 V/mV VS = 3V, –40 °C £ TA £ 85°C l 60 V/mV VS = 5V, VO = 500mV to 4.5V, RL = 10k 266 1000 V/mV VS = 5V, 0°C £ TA £ 70°C l 180 V/mV VS = 5V, –40 °C £ TA £ 85°C l 120 V/mV VOL Output Voltage Swing LOW No Load l 41 0 m V ISINK = 5mA l 200 400 mV VS = 5V, ISINK = 10mA l 350 600 mV VOH Output Voltage Swing HIGH V S = 3V, No Load l 2.885 2.93 V VS = 3V, ISOURCE = 3mA l 2.600 2.8 V VS = 5V, No Load l 4.885 4.93 V VS = 5V, ISOURCE = 10mA l 4.400 4.7 V ISC Short-Circuit Current (Note 2) V S = 3V, Short to GND 4 7.5 mA VS = 3V, Short to VCC 15 30 mA VS = 5V, Short to GND 12.5 22 mA VS = 5V, Short to VCC 20.0 40 mA Minimum Supply Voltage l 2.5 2.7 V Reverse Supply Voltage I S = –100mA l 18 V IS Supply Current 500 750 mA (Note 4) l 900 mA Supply Current, Shutdown V PIN5 = 2V, No Load (Note 8) l 71 8 mA ISHDN SHDN Pin Current V PIN5 = 0.3V (On), No load (Note 8) l 0.5 nA VPIN5 = 2V (Shutdown), No Load (Note 8) l 2.0 8 mA VPIN5 = 5V (Shutdown), No Load (Note 8) 5.0 mA Output Leakage Current, Shutdown V PIN5 = 2V, No Load (Note 8) l 0.05 1 mA Maximum SHDN Pin Current V PIN5 = 18V, No Load (Note 8) l 10 30 mA VIL SHDN Pin Input Low Voltage (Note 8) l 0.3 V VIH SHDN Pin Input High Voltage (Note 8) l 2V tON Turn-On Time V PIN5 = 5V to 0V, RL = 10k (Note 8) 18 ms tOFF Turn-Off Time V PIN5 = 0V to 5V, RL = 10k (Note 8) 2.2 ms GBW Gain Bandwidth Product f = 5kHz 1.5 2.5 MHz (Note 4) 0 °C £ TA £ 70°C l 1.2 MHz –40 °C £ TA £ 85°C l 1.1 MHz SR Slew Rate A V = –1, RL = ¥ 1.2 2.1 V/ ms (Note 5) 0 °C £ TA £ 70°C l 1.1 V/ ms –40 °C £ TA £ 85°C l 1.0 V/ ms FPBW Full-Power Bandwidth (Note 9) V OUT = 2VP-P 350 kHz tS Settling Time V S = 5V, DVOUT = 2V to 0.1%, AV = –1 3.7 ms THD Distortion V S = 3V, VO = 1.8VP-P, AV = 1, RL = 10k, f = 1kHz 0.001 %
The l denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = –5V, VCM = 0V,VOUT = 0V, for the 6-lead part VPIN5 = V–, pulse power tested unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOS Input Offset Voltage T A = 25°C 1.6 3.75 mV 0°C £ TA £ 70°C l 4.50 mV –40 °C £ TA £ 85°C l 4.80 mV DVOS/DT Input Offset Voltage Drift (Note 7) –40 °C £ TA £ 85°C l 51 5 mV/°C IOS Input Offset Current l 25 50 nA IB Input Bias Current l 250 500 nA DIB/DT Input Bias Current Drift 0 °C £ TA £ 70°C l 0.4 nA/ °C Input Noise Voltage 0.1Hz to 10Hz 1.5 mVP-P en Input Noise Voltage Density f = 1kHz 25 nV/ ÖHz in Input Noise Current Density f = 1kHz 0.3 pA/ ÖHz RIN Input Resistance Differential l 100 200 k W Common Mode, VCM = –5V to 13V l 45 80 k W CIN Input Capacitance 5p F VCM Input Voltage Range l –5 13 V CMRR Common Mode Rejection Ratio V CM = –5V to 13V l 60 70 dB AVOL Large-Signal Voltage Gain V O = –4V, RL= 10k 50 100 V/mV 0°C £ TA £ 70°C l 35 V/mV VOL Output Voltage Swing LOW No Load l –4.996 – 4.99 V ISINK = 5mA l –4.800 – 4.60 V ISINK = 10mA l –4.650 – 4.40 V VOH Output Voltage Swing HIGH No Load l 4.885 4.92 V ISOURCE = 5mA l 4.550 4.75 V ISOURCE = 10mA l 4.400 4.65 V ISC Short-Circuit Current (Note 2) Short to GND 15 27 mA 0°C £ TA £ 70°C l 10 mA PSRR Power Supply Rejection Ratio V S = –1.5V to –9V l 90 100 dB IS Supply Current 540 800 mA l 975 mA Supply Current, Shutdown V PIN5 = –3V, VS = –5V, No Load (Note 8) l 82 0 mA ISHDN SHDN Pin Current V PIN5 = –4.7V (On), VS = –5V, No load (Note 8) l 0.5 nA VPIN5 = –3V (Shutdown), VS = –5V, No Load (Note 8) l 2.0 8 mA Maximum SHDN Pin Current V PIN5 = 9V, VS = –9V (Note 8) l 10 30 mA Output Leakage Current, Shutdown V PIN5 = –7V, VS = –9V, No Load (Note 8) l 0.05 1 mA VIL SHDN Pin Input Low Voltage V S = –5V (Note 8) l – 4.7 V VIH SHDN Pin Input High Voltage V S = –5V (Note 8) l –3 V tON Turn-On Time V PIN5 = 0V to –5V, RL = 10k (Note 8) l 18 ms tOFF Turn-Off Time V PIN5 = –5V to 0V, RL = 10k (Note 8) l 2.2 ms GBW Gain Bandwidth Product f = 5kHz 1.55 2.6 MHz 0°C £ TA £ 70°C l 1.30 MHz –40°C £ TA £ 85°C l 1.20 MHz
SUPPLY VOLTAGE (V) 24 8 1 2 1 6 SUPPLY CURRENT (µA)
1784 G01
TA = 125°C TA = 25°C TA = –55°C SR Slew Rate A V = –1, RL = ¥ , VO = –4V, Measured at VO = –2V 1.3 2.2 V/ ms 0°C £ TA £ 70°C l 1.2 V/ ms –40°C £ TA £ 85°C l 1.1 V/ ms FPBW Full-Power Bandwidth (Note 9) V OUT = 8VP-P 94 kHz tS Settling Time V S = 5V, DVOUT = 4V to 0.1%, AV = 1 3.4 ms The l denotes specifications which apply over the specified temperature range, otherwise specifications are TA = 25°C. VS = –5V, VCM = 0V,VOUT = 0V, for the 6-lead part VPIN5 = V–, pulse power tested unless otherwise specified. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: A heat sink may be required to keep the junction temperature below absolute maximum. Note 3: VS = 5V limits are guaranteed by correlation to VS = 3V and VS = – 5V or VS = –9V tests. Note 4: VS = 3V limits are guaranteed by correlation to VS = 5V and VS = – 5V or VS = –9V tests. Note 5: Guaranteed by correlation to slew rate at VS = –5V, and GBW at VS = 5V and VS = –5V tests. Note 6: This specification implies a typical input offset voltage of 5.7mV at VCM = 18V and a maximum input offset voltage of 18mV at VCM = 18V. Note 7: This parameter is not 100% tested. Note 8: Specifications apply to 6-lead SOT-23 with shutdown. Note 9: Full-power bandwidth is calculated from the slew rate. FPBW = SR/2pVP. Note 10: The LT1784C is guaranteed functional over the operating temperature range –40 °C to 85°C. Note 11: The LT1784C is guaranteed to meet specified performance from 0°C to 70°C. The LT1784C is designed, characterized and expected to meet specified performance from –40 °C to 85°C but is not tested or QA sampled at these temperatures. LT1784I is guaranteed to meet specified performance from –40 °C to 85°C. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supply Current vs Supply Voltage Minimum Supply Voltage Output Voltage vs Large Input Voltage TYPICAL PERFOR A CE CHARACTERISTICS UW TOTAL SUPPLY VOLTAGE (V) INPUT OFFSET VOLTAGE CHANGE (µV)
1784 G02
–100 –200 –300 –400 TA = 125°C TA = 25°C TA = –55°C VIN (V) –10 VOUT (V) –2 6 10
1784 G03
–6 2 14 18 VS = 5V, 0V VIN
Input Bias Current vs Common Mode Voltage Output Saturation Voltage vs Load Current (Output High) Output Saturation Voltage vs Load Current (Output Low) Output Saturation Voltage vs Input Overdrive Output Short-Circuit Current vs Temperature 0.1Hz to 10Hz Noise Voltage Noise Voltage Density vs Frequency Input Noise Current vs Frequency Gain and Phase Shift vs Frequency TYPICAL PERFOR A CE CHARACTERISTICS UW SOURCING LOAD CURRENT (µA)
0.01 OUTPUT SATURATION VOLTAGE (V)
0.1 100 10000
1784 G05
TA = 125°C TA = 25°C TA = –55°C VS = –2.5V VOD = 30mV SINKING LOAD CURRENT (µA) OUTPUT SATURATION VOLTAGE (V) 1 100 1000 10000
1784 G06
0.1 0.01 0.001 TA = 125°C TA = –55°C TA = 25°C VS = –2.5V VOD = 30mV INPUT OVERDRIVE (mV) OUTPUT SATURATION VOLTAGE (mV) 100 10 20 30 40 50 60
1784 G07
VS = –2.5V NO LOAD OUTPUT HIGH OUTPUT LOW TEMPERATURE (°C) –50 OUTPUT CURRENT (mA) 0 50 100 DC194 G02 –25 25 12575 SINKING SOURCING VS = –5V TIME (sec) 01 3 5 7 9 NOISE VOLTAGE (400nV/DIV) 2468
1784 G09
VS = –2.5V FREQUENCY (Hz) INPUT NOISE VOLTAGE DENSITY (nV/ÖHz) 100 1 100 1k 100k
1784 G10
VS = –2.5V FREQUENCY (Hz) INPUT NOISE CURRENT DENSITY (pA/ÖHz) 1 100 1k 100k
1784 G11
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 VS = –2.5V FREQUENCY (Hz) GAIN (dB) PHASE (DEG) –10 –20 –30 120 100 –20 –40 –60 –80
1784 G12
VS = – 2.5V PHASE GAIN COMMON MODE VOLTAGE (V) 3.5 INPUT BIAS CURRENT (nA) 300,000 250,000 200,000 150,000 100,000 800 600 400 200 –200 –400 4 4.5 5 5.5
1784 G04
TA = 125°C VS = 5V, 0V TA = 25°C TA = –55°C
Temperature Slew Rate vs Temperature Gain Bandwidth Product and Phase Margin vs Supply Voltage Gain Bandwidth and Phase Margin vs Load Resistance Output Impedance vs Frequency Disabled Output Impedance vs Frequency Settling Time to 0.1% vs Output Step TYPICAL PERFOR A CE CHARACTERISTICS UW TEMPERATURE (°C) –50 GAIN BANDWIDTH PRODUCT (MHz) 2.8 2.7 2.6 2.5 2.4 2.3 2.2 25 75
1784 G13
–25 0 50 100 125 VS = – 2.5V f = 5kHz TEMPERATURE (°C) –50 SLEW RATE (V/µs) 3.0 2.5 2.0 1.5 25 75
1784 G14
–25 0 50 100 125 RISING FALLING VS = –5V TOTAL SUPPLY VOLTAGE (V) GAIN BANDWIDTH PRODUCT (MHz) 4 8 10 18
1784 G15
2.7 2.6 2.5 2.4 PHASE MARGIN (DEG) AV = –1 RF = RG = 10k f = 5kHz PHASE MARGIN GAIN BANDWIDTH PRODUCT LOAD RESISTANCE (Ω ) GAIN BANDWIDTHPRODUCT (MHz) PHASE MARGIN (DEG) 2.6 2.4 2.2 2.0 10k 100k
1784 G16
VS = –2.5V AV = –1 RF = RG = 10k f = 5kHz PHASE MARGIN GAIN BANDWIDTH PRODUCT FREQUENCY (Hz) POWER SUPPLY REJECTION RATIO (dB) –10 10k 100k 1M
1784 G17
VS = – 2.5V FREQUENCY (Hz) 10k COMMON MODE REJECTION RATIO (dB) 120 110 100 100k 1M
1784 G18
VS = – 2.5V FREQUENCY (Hz) OUTPUT IMPEDANCE (Ω ) 10k 100k 100 10k 100k
1784 G20
VS = – 2.5V VPIN 5 = 2.5V PSRR vs Frequency CMRR vs Frequency FREQUENCY (Hz) OUTPUT IMPEDANCE (Ω ) 100 10k 100k 1M
1784 G19
0.1 0.01 AV = 100 AV = 10 AV = 1 VS = –2.5V SETTLING TIME (µs) OUTPUT STEP (V) 2 4 5
1784 G21
VS = –5V AV = –1 AV = –1 AV = 1 AV = 1
Overshoot vs Capacitive Load Undistorted Output Swing vs Frequency Total Harmonic Distortion + Noise vs Frequency Total Harmonic Distortion + Noise vs Load Resistance Total Harmonic Distortion + Noise vs Output Voltage Amplitude Open-Loop Gain Supply Current vs SHDN Pin Voltage Large Signal Response Small Signal Response TYPICAL PERFOR A CE CHARACTERISTICS UW FREQUENCY (Hz) THD + NOISE (%) 10 1k 10k 100k
1784 G24
0.1 0.01 0.001 0.0001 RL = 10k VS = 3V, 0V VOUT = 1.8VP-P VCM = 1V AV = –1 AV = 1 OUTPUT VOLTAGE (V) INPUT OFFSET VOLTAGE CHANGE (50µV/DIV)
1784 G27
RL = 2k RL = 10k RL = 50k VS = –5V SHUTDOWN PIN VOLTAGE (V) SUPPLY CURRENT (µA) 0.5 1 2.5
1784 G28
1.5 2 600 550 500 450 400 350 300 250 200 150 100 TA = 125°C TA = –55°C TA = 25°C VS = 5V, 0V VS = –5V AV = 1 CL = 15pF 2V/DIV 5µs/DIV VS = –5V AV = 1 CL = 15pF 20mV/DIV 2µs/DIV FREQUENCY (Hz) OUTPUT SWING (VP-P) 10k 100k 1M
1784 G23
DISTORTION ≤ 1% AV = 1VS = – 5V VS = –2.5V CAPACITIVE LOAD (pF) OVERSHOOT (%) 100 1000
1784 G22
VS = 5V, 0V VCM = 2.5V AV = 1 AV = 5 AV = 10 LOAD RESISTANCE TO GROUND (Ω ) 0.001THD + NOISE (%) 0.01 0.1 100 10k 100k
1784 G25
0.0001 VS = –1.5V VIN = –1V AV = 1 VS = 3V TOTAL VIN = 2VP-P AT 1kHz VS = 3V, 0V VIN = 0.1V TO 2.1V OUTPUT VOLTAGE AMPLITUDE (VP-P) 0.01THD + NOISE (%) 0.1 02 3 0.001
1784 G26
FREQUENCY = 1kHz VCM = HALF SUPPLY AV = –1 VS = 3V, 0V RF = RG = 10k AV = 1 VS = 3V, 0V AV = 1 VS = –1.5V AV = –1 VS = –1.5V RF = RG = 10k
APPLICATIO S I FOR ATIOWU UU Supply Voltage The positive supply pin of the LT1784 should be bypassed with a small capacitor (typically 0.1mF) within an inch of the pin. When driving heavy loads, and additional 4.7 mF electrolytic capacitor should be used. When using split supplies the same is true for the negative supply pin. The LT1784 is protected against reverse battery voltages up to 18V. In the event a reverse battery condition occurs the supply current is less than 1nA. Inputs The LT1784 has two input stages, NPN and PNP (see the Simplified Schematic), resulting in three distinct operating regions as shown in the “Input Bias Current vs Common Mode” Typical Performance Characteristic Curve. For input voltages about 1V or more below V +, the PNP input stage is active and the input bias current is typically –250nA. When the input common mode voltage is within 0.6V of the positive rail, the NPN stage is operating and the input bias current is typically 500nA. Increases in tem- perature will cause the voltage at which operation switches from the PNP input stage to the NPN input stage to move towards V +. The input offset voltage of the NPN stage is untrimmed and is typically 3mV. A Schottky diode in the collector of the input transistors, along with special geometries for these NPN transistors, allow the LT1784 to operate with either or both of its inputs above V +. At about 0.3V above V+, the NPN input transis- tors is fully saturated and the input bias current is typically 200mA at room temperature. The input offset voltage is typically 3mV when operating above V +. The LT1784 will operate with inputs 18V above V– regardless of V+. The inputs are protected against excursions as much as 10V below V– by an internal 1k resistor in series with each input and a diode from the input to the negative supply. The input stage of the LT1784 incorporates phase reversal protection to prevent the output from phase reversing for inputs up to 9V below V –. There are no clamping diodes between the inputs and the maximum differential input voltage is 18V. Output The output of the LT1784 can swing to within 80mV of the positive rail and within 4mV of the negative rail with no load. When monitoring input voltages within 80mV of the positive rail or within 4mV of the negative rail, gain should be taken to keep the output from clipping. The LT1784 can typically sink and source over 25mA at –5V supplies, sourcing current is reduced to 7.5mA at 3V total supplies as noted in the electrical characteristics. The LT1784 is internally compensated to drive at least 400pF of capacitance under any output loading condi- tions. A 0.22mF capacitor in series with a 150 W resistor between the output and ground will compensate these amplifiers for larger capacitive loads, up to 10,000pF at all output currents. Distortion There are two main contributors to distortion in op amps: output crossover distortion as the output transitions from sourcing to sinking current, and distortion caused by nonlinear common mode rejection. If the op amp is operating inverting, there is no common mode induced distortion. If the op amp is operating in the PNP input stage (input not within 1V of V +), the CMRR is very good, typically 95dB. When the LT1784 switches between input stages, there is significant nonlinearity in the CMRR. Lower load resistance increases the output crossover distortion but has no effect on the input stage transition distortion. For lowest distortion, the LT1784 should be operated single supply, with the output always sourcing current and with the input voltage swing between ground and (V + –1V). See Typical Performance Characteristics Curve, “Total Harmonic Distortion + Noise vs Output Voltage Amplitude.” Gain The open-loop gain is almost independent of load when the output is sourcing current. This optimizes perfor- mance in single supply applications where the load is returned to ground. The Typical Performance Characteric Curve “Open-Loop Gain” for various loads shows the details.
The 6-lead part includes a shutdown feature that disables the part, reducing quiescent current and making the output high impedance. The part can be shut down by bringing the SHDN pin 1.2V or more above V–. When shut down, the supply current is less than 1mA (V– £ VOUT £ V+). In normal operation, the SHDN pin can be tied to V– or left floating. See Typical Performance Characteristics Curve, “Supply Current vs SHDN pin Voltage.” APPLICATIO S I FOR ATIOWU UU SI PLIFIED SCHE ATICWW Negative Rectifier Adjustable Clamp Q10 1.5k 1.5k 0.75k 0.75k –IN +IN Q11 Q12 Q13 Q14 Q15 Q19 Q16 Q18 Q22 Q17 Q20 Q21 OUT 1784 SS SHDN 20mA Q23 Q24Q25 Q26 LT1784 VIN OUT LT1784 LT1784 VIN VCLAMP VCLAMP - ~80mV VOUT
1784 TA07
- ~80mV TYPICAL APPLICATIO SU
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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 5-Lead Plastic SOT-23 (Reference LTC DWG # 05-08-1633) (Reference LTC DWG # 05-08-1635) 6-Lead Plastic SOT-23 (Reference LTC DWG # 05-08-1634) (Reference LTC DWG # 05-08-1636) 1.50 – 1.75 (.059 – .069) (NOTE 3) 2.60 – 3.00 (.102 – .118) .25 – .50 (.010 – .020) (5PLCS, NOTE 2) L DATUM ‘A’ .09 – .20 (.004 – .008) (NOTE 2) S5 SOT-23 0401 PIN ONE 2.80 – 3.10 (.110 – .118) (NOTE 3) .95 (.037) REF A A2 1.90 (.074) REF .20 (.008) .90 – 1.45 (.035 – .057) SOT-23 (Original) .00 – .15 (.00 – .006) .90 – 1.30 (.035 – .051) .35 – .55 (.014 – .021)
1.00 MAX
(.039 MAX) SOT-23 (ThinSOT) A L .01 – .10 (.0004 – .004) .80 – .90 (.031 – .035) .30 – .50 REF (.012 – .019 REF) MILLIMETERS (INCHES) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE 4. DIMENSIONS ARE INCLUSIVE OF PLATING 5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 6. MOLD FLASH SHALL NOT EXCEED .254mm 7. PACKAGE EIAJ REFERENCE IS: SC-74A (EIAJ) FOR ORIGINAL JEDEC MO-193 FOR THIN 1.50 – 1.75 (.059 – .069) (NOTE 3) 2.60 – 3.00 (.102 – .118) .25 – .50 (.010 – .020) (6PLCS, NOTE 2) L DATUM ‘A’ .09 – .20 (.004 – .008) (NOTE 2) S6 SOT-23 0401 2.80 – 3.10 (.110 – .118) (NOTE 3) .95 (.037) REF A A2 1.90 (.074) REF .20 (.008) .90 – 1.45 (.035 – .057) .00 – 0.15 (.00 – .006) .90 – 1.30 (.035 – .051) .35 – .55 (.014 – .021) (.039 MAX)A L .01 – .10 (.0004 – .004) .80 – .90 (.031 – .035) .30 – .50 REF (.012 – .019 REF) PIN ONE ID MILLIMETERS (INCHES) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE 4. DIMENSIONS ARE INCLUSIVE OF PLATING 5. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 6. MOLD FLASH SHALL NOT EXCEED .254mm 7. PACKAGE EIAJ REFERENCE IS: SC-74A (EIAJ) FOR ORIGINAL JEDEC MO-193 FOR THIN SOT-23 (Original) SOT-23 (ThinSOT)
PART NUMBER DESCRIPTION COMMENTS LT1782 Micropower Over-The-Top Rail-to-Rail In/Out Op Amp in SOT-23 55 mA Max Supply Current, 800mV Max Offset Voltage LT1783 1.25MHz Over-The-Top Rail-to-Rail In/Out Op Amp in SOT-23 300 mA Max Supply Current, 800mV Max Offset Voltage LT1797 10MHz Rail-to-Rail In/Out Op Amp in SOT-23 Unity-Gain Stable, 2.25 mV/ms Slew Rate LT1637 1.1MHz Over-The-Top Rail-to-Rail In/Out Op Amp Micropower, 0.4V/ ms Slew Rate LT1638/LT1639 Dual/Quad 1.2MHz Over-The-Top Rail-to-Rail In/Out Op Amp Micropower 230 mA Max, 0.4V/ms Slew Rate LT1880 SOT-23 Pico Amp Input, Precision, Rail-to-Rail Output Op Amp 150 mV Offset, 900pA Bias Current 1784f LT/TP 0601 2K • PRINTED IN USA ª LINEAR TECHNOLOGY CORPORATION 2000 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 l FAX: (408) 434-0507 l www.linear.com RELATED PARTS TYPICAL APPLICATIO SU Protected Fault Conditions LT1784 LT1784 + – LT1784 LT1784 REVERSE BATTERY INPUT DIFFERENTIAL VOLTAGE INPUTS BELOW GROUNDINPUT OVERVOLTAGE –18V 5V 5V 5V 24V 10V 18V V+ V+
1784 TA02
Simple Peak Detector Single Supply Full Wave Rectifier ACCURACY 98% 90% 3dB BANDWIDTH 3kHz TO 5.7kHz 116Hz TO 47kHz 34Hz TO 96kHz–
1784 TA04
1µF 100k VIN = 3VP-P, VCM = 2.5V LT1784 IN 5V BAT54 OUT WORKS WELL TO 15kHz
1785 TA05
100µs/DIVVS = –5V VIN = 3VP-P AT 5kHz