74HS14

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6275faFor more information www.linear.com/LT6275 TYPICAL APPLICATION FEATURES DESCRIPTION 90MHz, 2200V/µs 30V Low Power Op Amps The LT®6274/LT6275 are single/dual low power , high speed, very high slew rate operational amplifiers with outstanding AC and DC performance. The circuit topology is a voltage feedback amplifier with matched high imped- ance inputs plus the enhanced slewing performance of a current feedback amplifier . The high slew rate and single stage design provide excellent settling characteristics that make the circuit an ideal choice for data acquisition sys- tems. Each output drives a 1k load to ±13.25V with ±15V supplies and a 500Ω load to ±3.5V on ±5V supplies. The LT6274/LT6275 are stable with any capacitive load mak- ing them useful in buffer or cable driving applications. The LT6274 single op amp is available in a 5-lead TSOT -23 package, and the LT6275 dual op amp is available in an 8-lead MSOP package. They operate with guaranteed specifications over the –40°C to 85°C and –40°C to 125°C temperature ranges.

APPLICATIONS

n 2200V/μs Slew Rate n 90MHz –3dB Bandwidth (AV = +1) n 40MHz Gain-Bandwidth Product n 1.6mA Supply Current per Amplifier n C-Load™ Op Amp Drives All Capacitive Loads n ±4.5V to ±16V Operating Supply Range n Unity-Gain Stable n 10nV/√Hz Input Noise Voltage n 400µV Maximum Input Offset Voltage n 500nA Maximum Input Bias Current n 30nA Maximum Input Offset Current n ±13.25V Minimum Output Swing into 1k (±15V Supply) n ±3.5V Minimum Output Swing into 500Ω (±5V Supply) n 74dB Minimum Open-Loop Gain, RL = 1k n 40ns Settling Time to 1%, 10V Step n Specified at ±5V and ±15V n Single in 5-Lead TSOT-23 Package n Dual in 8-Lead MSOP Package n Wideband Large Signal Amplification n Cable Drivers n Buffers n Automated Test Equipment n Data Acquisition Systems n High Fidelity Video and Audio Amplification All registered trademarks and trademarks are the property of their respective owners. All other trademarks are the property of their respective owners.

6275 TA01

–15V VOUT VIN AV = –1 FPBW = 3MHz LT627410V –10V 10V –10V Undistorted Output Swing vs Frequency Wideband Large Signal Amplification V S = ±15V R L = 1k 1% MAX DISTORTION A V = +1 A V = –1 A V = –10 FREQUENCY (Hz) 100k 10M 100M OUTPUT VOL TAGE (V P-P

6275 G31

6275fa For more information www.linear.com/LT6275 PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS Total Supply Voltage Differential Input Voltage (Transient Only) (Note 2) Input Voltage Input Current (+IN, –IN) (Note 3) Output Current (Note 12) 5mARMS Output Short-Circuit Current Duration Note 4) (Note 1) ORDER INFORMATION TUBE TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT6274IS5#PBF LT6274IS5 #TRPBF L THCY 5-Lead Plastic TSOT-23 –40°C to 85°C LT6274HS5#PBF LT6274HS5 #TRPBF L THCY 5-Lead Plastic TSOT-23 –40°C to 125°C LT6275IMS8#PBF LT6275IMS8 #TRPBF LT FYV 8-Lead Plastic MSOP –40°C to 85°C LT6275HMS8#PBF LT6275HMS8 #TRPBF LT FYV 8-Lead Plastic MSOP –40°C to 125°C *The temperature grade is identified by a label on the shipping container . Consult L TC Marketing for parts specified with wider operating temperature ranges. 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/. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix. http://www.linear .com/product/LT6275#orderinfo OUT 1 V– 2 TOP VIEW S5 PACKAGE 5-LEAD PLASTIC TSOT-23 +IN 3 5 V+ 4 –IN + – θJA = 215°C/W OUTA –INA +INA V OUTB –INB +INB TOP VIEW MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 163°C/W Operating Temperature Range (Note 5) L T6274I/LT6275I L T6274H/LT6275H Specified Temperature Range (Note 6) L T6274I/LT6275I L T6274H/LT6275H Maximum Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10 sec)

6275faFor more information www.linear.com/LT6275

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOS Input Offset Voltage (Note 7) l ±0.15 ±0.4 ±1.2 mV mV VOS/∆T Input Offset Voltage Drift (Note 8) l ±4 ±10 µV/°C IB Input Bias Current l ±100 ±500 ±1000 nA nA IOS Input Offset Current l ±3 ±30 ±50 nA nA en Input Voltage Noise Density f = 1kHz 10 nV/√Hz Low Frequency Integrated Voltage Noise 0.1Hz to 10Hz 1 µVP-P 1/f 1/f Noise Corner Frequency Voltage Noise Current Noise Hz Hz in Input Current Noise Density f = 1kHz 0.5 pA/√Hz RIN Input Resistance Common Mode, VCM = ±12V, VS = ±15V Differential Mode l 100 700 MΩ MΩ CIN Input Capacitance Common Mode Differential Mode 0.4 pF pF VINCM Input Voltage Range + (Note 9) VS = ±15V VS = ±5V l l 2.5 13.4 3.4 V V Input V oltage Range – (Note 9) VS = ±15V VS = ±5V l l –13.2 –3.2 –2.5 V V CMRR Common Mode Rejection Ratio VS = ±15V, VCM = ±12V VS = ±5V, VCM = ±2.5V l l 110 102 dB dB PSRR Power Supply Rejection Ratio VS = ±4.5V to ±16V l 90 115 dB VS Supply Voltage Range (Note 10) l 9 32 V Channel Separation VS = ±15V, VOUT = ±1V, AV = 1, RL = 1kΩ l 100 126 dB AVOL Open-Loop Voltage Gain VS = ±15V, VOUT = ±12V, RL = 1kΩ VS = ±5V, VOUT = ±2.5V, RL = 500Ω l l dB dB VOUT Maximum Output Voltage Swing ±40mV Input Overdrive VS = ±15V, RL = 1kΩ VS = ±5V, RL = 500Ω l l ±13.25 ±3.5 ±13.5 ±3.8 V V IOUT Output Current VS = ±15V, VOUT = ±12V, VIN = ±40mV VS = ±5V, VOUT = ±2.5V, VIN = ±40mV l l ±15 ±12 ±30 mA mA ISC Output Short-Circuit Current VS = ±15V, VOUT = 0V, VIN = ±3V VS = ±5V, VOUT = 0V, VIN = ±3V l l ±35 ±30 ±80 mA mA IS Supply Current Per Amplifier , VS = ±15V l 1.6 1.7 2.3 mA mA SR Slew Rate (Note 11) VS = ±15V, AV = 1 VS = ±15V, AV = –1 VS = ±15V, AV = –2 VS = ±5V, AV = –2 l l 900 270 2200 1600 1250 400 V /µs V/µs V/µs V/µs FPBW Full Power Bandwidth V S = ±15V, 10V Peak, AV = –1, <1% THD VS = ±5V, 1V Peak, AV = –1, <1% THD MHz MHz GBW Gain-Bandwidth Product fTEST = 200kHz VS = ±15V VS = ±5V l l MHz MHz f –3dB Unity Gain –3dB Bandwidth VOUT = 100mVP-P, VS = ±15V 90 MHz The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless noted otherwise, VCM = 0V, and specifications apply at both VS = (V+ – V–) = ±5V and ±15V.

6275fa For more information www.linear.com/LT6275 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: Differential inputs of ±10V are appropriate for transient operation only, such as during slewing. Large, sustained differential inputs will cause excessive power dissipation and may damage the part. See Input Considerations in the Applications Information section of this data sheet for more details. Note 3: The inputs are protected by ESD protection diodes to each power supply. The Input current should be limited to less than 10mA. Note 4: A heat sink may be required to keep the junction temperature below the absolute maximum rating when the output is shorted indefinitely. Note 5: The LT6274I/LT6275I are guaranteed functional over the operating temperature range of –40°C to 85°C. The LT6274H/LT6275H are guaranteed functional over the operating temperature range of –40°C to 125°C. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless noted otherwise, VCM = 0V, and specifications apply at both VS = (V+ – V–) = ±5V and ±15V. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS tR, tF Small Signal Rise/Fall Time AV = 1, 10% – 90%, 100mV Input Step 4 ns tPD Propagation Delay 50% VIN to 50% VOUT, 100mV Input Step 4 ns ts Settling Time 1% of 10V Step, AV = 1, VS = ±15V 0.1% of 10V Step, AV = 1, VS = ±15V 1% of 5V Step, AV = 1, VS = ±5V 185 ns ns ns Note 6 : The LT6274I/LT6275I are guaranteed to meet specified performance from –40°C to 85°C. The LT6274H/LT6275H are guaranteed to meet specified performance from –40°C to 125°C. Note 7: Input offset voltage is pulse tested and is exclusive of warm-up drift. Note 8: This parameter is not 100% tested. Note 9: Input voltage range is guaranteed by common mode rejection ratio test. Note 10: Supply voltage range is guaranteed by power supply rejection ratio test. Note 11: Slew rate is measured between 20% and 80% of output step with ±6V input (at A V = –2) and ±10V input (at AV = ±1) for ±15V supplies, and between 35% and 65% of output step with ±1.75V input (at AV = –2) for ±5V supplies. Note 12: Current density limitations within the IC require the continuous RMS current supplied by the output (sourcing or sinking) over the operating lifetime of the part be limited to under 115mA (Absolute Maximum). Proper heat sinking may be required to keep the junction temperature below the absolute maximum rating.

6275faFor more information www.linear.com/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Input Common Mode Voltage Input Bias Current vs Temperature Open-Loop Gain vs Temperature Open-Loop Gain vs Temperature Open-Loop Gain vs Resistive Load Output Voltage Swing vs Resistive Load Supply Current vs Supply Voltage and Temperature (per Amplifier) Input Offset Voltage vs Input Common Mode Voltage Typical Distribution of Input Offset Voltage Drift 25°C 125°C –40°C TOTAL SUPPL Y VOL TAGE (V) 0.5 1.0 1.5 2.0 2.5 3.0 SUPPL Y CURRENT (mA)

6275 G01

25°C 125°C –40°C V S = ±15V INPUT COMMON MODE VOL TAGE (V) –15 –10 –500 –400 –300 –200 –100 100 200 INPUT BIAS CURRENT (nA)

6275 G04

V S = ±15V TEMPERATURE (°C) –50 –25 100 125 –400 –300 –200 –100 100 200 300 400 INPUT BIAS CURRENT (nA)

6275 G05

V S = ±15V V OUT = ±12V R L = 1k TEMPERATURE (°C) –50 –25 100 125 OPEN-LOOP GAIN (dB)

6275 G06

V S = ±5V V OUT = ±2.5V R L = 500Ω TEMPERATURE (°C) –50 –25 100 125 OPEN-LOOP GAIN (dB)

6275 G07

V S = ±5V V S = ±15V T A = 25°C V OUT = ±100mV LOAD RESISTANCE (Ω) 100 10k 100k 100 OPEN-LOOP GAIN (dB)

6275 G08

V S = ±15V V IN = ±20mV T A = 25°C LOAD RESISTANCE (Ω) 100 10k 100k OUTPUT VOL TAGE SWING (±V)

6275 G09

25°C 125°C –40°C V S = ±15V INPUT COMMON MODE VOL TAGE (V) –15 –10 –500 –400 –300 –200 –100 100 200 INPUT OFFSET VOL TAGE (µV)

6275 G02

V S = ±15V

36 UNITS

INPUT OFFSET VOL TAGE DRIFT (µV/°C) PERCENTAGE OF UNITS (%)

6275 G03

6275fa For more information www.linear.com/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS Settling Time vs Output Step Output Short-Circuit Current vs Temperature Output Short-Circuit Current vs Temperature Input Noise Spectral Density 0.1Hz to 10Hz Input Voltage Noise Output Voltage Swing vs Resistive Load Output Voltage Swing vs Supply Voltage Output Voltage Swing vs Load Current Output Voltage Swing vs Load Current V S = ±5V V IN = ±20mV T A = 25°C LOAD RESISTANCE (Ω) 100 10k 100k 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 OUTPUT VOL TAGE SWING (±V)

6275 G10

R L = 1k R L = 1k R L = 500Ω R L = 500Ω V IN = ±20mV TOTAL SUPPL Y VOL TAGE (V) V V OUTPUT VOL TAGE SWING (V)

6275 G11

TA = ±25°C V S = ±15V V IN = ±20mV 125°C 125°C –40°C –40°C 25°C 25°C OUTPUT CURRENT (mA) –50 –40 –30 –20 –10 V V OUTPUT VOL TAGE SWING (V)

6275 G12

V S = ±5V V IN = ±20mV 125°C 125°C –40°C –40°C 25°C 25°C OUTPUT CURRENT (mA) –50 –40 –30 –20 –10 V V OUTPUT VOL TAGE SWING (V)

6275 G13

V S = ±15V V IN = ±3V SOURCE SINK TEMPERATURE (°C) –50 –25 100 125 100 110 OUTPUT SHORT-CIRCUIT CURRENT (mA)

6275 G14

V S = ±5V V IN = ±3V SOURCE SINK TEMPERATURE (°C) –50 –25 100 125 100 OUTPUT SHORT-CIRCUIT CURRENT (mA)

6275 G15

e n i n FREQUENCY (Hz) 100 10k 100k 100 0.1 100 INPUT VOL TAGE NOISE (nV/√ Hz INPUT CURRENT NOISE (pA/√ Hz

6275 G16

V S = ±15V V S = ±15V TIME (1s/DIV) INPUT VOL TAGE NOISE (200nV/DIV)

6275 G17

V S = ±15V A V = 1 R L = 2k 0.1% OUTPUT STEP (V) 100 150 200 250 SETTLING TIME (ns)

6275 G18

6275faFor more information www.linear.com/LT6275 Closed-Loop Output Impedance vs Frequency Gain/Phase vs Frequency Gain-Bandwidth Product and Phase Margin vs Temperature Gain-Bandwidth Product and Phase Margin vs Supply Voltage TYPICAL PERFORMANCE CHARACTERISTICS Power Supply Rejection Ratio vs Frequency Closed-Loop Frequency Response vs Load Capacitance Closed-Loop Frequency Response vs Load Capacitance Crosstalk vs Frequency V S = ±15V T A = 25°C A V = 1 A V = 10 A V = 100 FREQUENCY (Hz) 100 10k 100k 10M 100M 0.01 0.1 100 OUTPUT IMPEDANCE (Ω)

6275 G20

V S = ±5V V S = ±15V T A = 25°C FREQUENCY (Hz) 10k 100k 10M 100M –20 –10 –210 –180 –150 –120 –90 –60 GAIN (dB) PHASE (DEG)

6275 G21

V S = ±5V PHASE MARGIN V S = ±15V GAIN-BANDWIDTH PRODUCT V S = ±15V GAIN-BANDWIDTH PRODUCT V S = ±5V TEMPERATURE (°C) –50 –25 100 125 GAIN-BANDWIDTH PRODUCT (MHz) PHASE MARGIN (DEG)

6275 G22

T A = 25°C TOTAL SUPPL Y VOL TAGE (V) GAIN-BANDWIDTH PRODUCT (MHz) PHASE MARGIN (DEG)

6275 G23

V S = ±15V T A = 25°C A V = 1 C = 0 C = 50pF C = 100pF C = 500pF C = 10nF C = 5nF C = 1nF FREQUENCY (Hz) 100k 10M 100M –20 –10 GAIN MAGNITUDE (dB)

6275 G24

V S = ±5V T A = 25°C A V = 1 C = 0 C = 50pF C = 100pF C = 500pF C = 10nF C = 5nF C = 1nF FREQUENCY (Hz) 100k 10M 100M –20 –10 GAIN MAGNITUDE (dB)

6275 G25

T A = 25°C A V = 1 V IN = 2V P–P V S = ±15V R L = 1k V S = ±5V R L = 500Ω FREQUENCY (Hz) 10k 100k 10M 100M –130 –120 –110 –100 –90 –80 –70 –60 –50 CROSSTALK (dB)

6275 G26

V S = ±15V T A = 25°C –PSRR +PSRR FREQUENCY (Hz) 100 10k 100k 10M 100M –20 100 120 POWER SUPPL Y REJECTION RATIO (dB)

6275 G27

Common Mode Rejection Ratio vs Frequency V S = ±15V T A = 25°C FREQUENCY (Hz) 100 10k 100k 10M 100M 100 120 COMMON MODE REJECTION RATIO (dB)

6275 G28

6275fa For more information www.linear.com/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS Slew Rate vs Capacitive Load Step Response Overshoot vs Capacitive Load Slew Rate vs Input Level Slew Rate vs Temperature 2nd and 3rd Harmonic Distortion vs Frequency (A V = 1) 2nd and 3rd Harmonic Distortion vs Frequency (A V = –1) Undistorted Output Swing vs Frequency Undistorted Output Swing vs Frequency V S = ±15V V IN = 10V P–P R L = 1k 2ND HARMONIC 3RD HARMONIC FREQUENCY (Hz) 100 10k 100k 10M –140 –130 –120 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 HARMONIC DISTORTION (dBc)

6275 G29

V S = ±15V V IN = 10V P–P R G = R F = 1k 2ND HARMONIC 3RD HARMONIC FREQUENCY (Hz) 100 10k 100k 10M –140 –130 –120 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 HARMONIC DISTORTION (dBc)

6275 G30

V S = ±15V R L = 1k 1% MAX DISTORTION A V = +1 A V = –1 A V = –10 FREQUENCY (Hz) 100k 10M 100M OUTPUT VOL TAGE (V P-P V S = ±5V R L = 1k 1% MAX DISTORTION A V = +1 A V = –10 A V = –1 FREQUENCY (Hz) 100k 10M 100M OUTPUT VOL TAGE (V P-P

6275 G32

V S = ±15V OUTPUT RISING V S = ±15V T A = 25°C A V = –1 R G = R F = 2k 20% to 80% OF STEP V S = ±5V INPUT LEVEL (V P-P 500 1000 1500 2000 2500 SLEW RATE (V/µs)

6275 G33

V S = ±15V ±12V OUTPUT STEP OUTPUT RISING V S = ±15V ±12V OUTPUT STEP A V = –2 R G = 2k, R F = 4k 20% to 80% OF STEP V S = ±5V ±3.5V OUTPUT STEP TEMPERATURE (°C) –50 –25 100 125 500 1000 1500 2000 2500 SLEW RATE (V/µs)

6275 G34

V S = ±15V A V = –1 R G = R F = 2k 20% to 80% of ±10V STEP LOAD CAPACITANCE (F) 10p 100p 10n 100n 0.1 100 1000 10000 SLEW RATE (V/µs)

6275 G35

A V = –1 R G = R F = 2k A V = 1 V S = ±15V 100mV STEP LOAD CAPACITANCE (F) 10p 100p 10n 100n OVERSHOOT (%)

6275 G36

6275faFor more information www.linear.com/LT6275 Small-Signal Step Response (AV = 1) Small-Signal Step Response V = –1) Small-Signal Step Response V = 1, CL = 10nF) TYPICAL PERFORMANCE CHARACTERISTICS Large-Signal Step Response V = 1) Large-Signal Step Response V = –1) Large-Signal Step Response V = 1, CL = 10nF) V S = ±15V 20ns/DIV 20mV/DIV

6275 G37

V S = ±15V R G = R F = 2k 20ns/DIV 20mV/DIV

6275 G38

V S = ±15V 500ns/DIV 20mV/DIV

6275 G39

V S = ±15V 50ns/DIV 5V/DIV

6275 G40

V S = ±15V R G = R F =2k 50ns/DIV 5V/DIV

6275 G41

V S = ±15V 5µs/DIV 5V/DIV

6275 G42

6275fa For more information www.linear.com/LT6275 SIMPLIFIED SCHEMATIC (ONE AMPLIFIER SHOWN)

6275 SS01

+IN –IN CC RC C

6275faFor more information www.linear.com/LT6275 PIN FUNCTIONS –IN: Inverting Input of Amplifier . +IN: Noninverting Input of Amplifier . V+: Positive Supply Voltage. Total supply voltage (V+ – V–) ranges from 9V to 32V. V–: Negative Supply Voltage. Total supply voltage (V+ – V–) ranges from 9V to 32V. OUT: Amplifier Output.

6275fa For more information www.linear.com/LT6275 Circuit Operation The LT6274/ LT6275 circuit topology is a true voltage feedback amplifier that has the slewing behavior of a cur- rent feedback amplifier . The operation of the circuit can be understood by referring to the simplified schematic. The inputs are buffered by complementary NPN and PNP emitter followers that drive a 1k resistor. The input voltage appears across the resistor generating currents that are mirrored into the high impedance node. Complementary followers form an output stage that buffers the gain node from the load. The bandwidth is set by the internal input resistor and the capacitance on the high impedance node. The slew rate is determined by the current available to charge the gain node capacitance. This current is the dif- ferential input voltage divided by R1, so the slew rate is proportional to the input. This important characteristic gives the LT6274/ LT6275 superior slew performance compared to conventional voltage feedback amplifiers in which the slew rate is constrained by a fixed current (bias- ing the input transistors) available to charge the gain node capacitance (independent of the magnitude of the differen- tial input voltage). Therefore, in the LT6274/LT6275, high- est slew rates are seen in the lowest gain configurations. For example, a 10V output step in a gain of 10 has only a 1V input step, whereas the same output step in unity gain has a 10 times greater input step. The curve of Slew Rate vs Input Level illustrates this relationship. The LT6274/ LT6275 are tested in production for slew rate in a gain of –2 so higher slew rates can be expected in gains of 1 and –1, with lower slew rates in higher gain configurations. Special compensation across the output buffer allows the LT6274/LT6275 to be stable with any capacitive load. The RC network across the output stage is bootstrapped when the amplifier is driving a light or moderate load and has no effect under normal operation. When driving a capaci- tive load (or a low value resistive load) the network is incompletely bootstrapped and adds to the compensa- tion at the high impedance node. The added capacitance slows down the amplifier by lowering the dominant pole frequency, improving the phase margin. The zero created by the RC combination adds phase to ensure that even for very large load capacitances, the total phase lag does not exceed 180° (zero phase margin), and the amplifier remains stable. APPLICATIONS INFORMATION Comparison to Current Feedback Amplifiers The LT6274/LT6275 enjoy the high slew rates of Current Feedback Amplifiers (CFAs) while maintaining the char - acteristics of a true voltage feedback amplifier . The pri- mary differences are that the LT6274/LT6275 have two high impedance inputs, and the closed loop bandwidth decreases as the gain increases. CFAs have a low imped- ance inverting input and maintain relatively constant bandwidth with increasing gain. The LT6274/LT6275 can be used in all traditional op amp configurations including integrators and applications such as photodiode ampli - fiers and I-to-V converters where there may be significant capacitance on the inverting input. The frequency com - pensation is internal and does not depend on the value of the external feedback resistor . For CFAs, by contrast, the feedback resistance is fixed for a given bandwidth, and capacitance on the inverting input can cause peaking or oscillations. The slew rate of the LT6274/ LT6275 in noninverting gain configurations is also superior to that of CFAs in most cases. Input Considerations Each of the LT6274/LT6275 inputs is the base of an NPN and a PNP transistor whose base currents are of opposite polarity and provide first-order input bias current cancel- lation. Because of differences between NPN and PNP beta, the polarity of the input bias current can be positive or negative. The offset current does not depend on NPN/PNP beta matching and is well controlled. The use of balanced source resistance at each input is therefore recommended for applications where DC accuracy must be maximized. The inputs can withstand transient differential input volt- ages up to ±10V without damage and need no clamping or source resistance for protection. Differential inputs, however , generate large supply currents (tens of mA) as required for high slew rates. If the device is used with sustained differential inputs, the average supply current will increase, excessive power dissipation will result, and the part may be damaged. The part should not be used as a comparator , peak detector or in other open-loop applications with large, sustained differential inputs. Under normal, closed-loop operation, an increase of power dissipation is only noticeable in applications with

6275faFor more information www.linear.com/LT6275 large slewing outputs, and the increased power is propor- tional to the magnitude of the differential input voltage and the percent of the time that the inputs are apart. Measure the average supply current for the application in order to calculate the power dissipation. Capacitive Loading The LT6274/LT6275 are stable with any capacitive load. As previously stated in the Circuit Operation section of this data sheet, this is accomplished by dynamically sensing the load-induced output pole and adjusting the compensa- tion at the amplifier’s internal gain node. As the capacitive load increases, the bandwidth will decrease. The phase margin may increase or decrease with different capaci - tive loads, and so there may be peaking in the frequency domain and overshoot in the transient response for some capacitive loads as shown in the Typical Performance curves. The Small-Signal Step Response curve with 10nF load shows 30% overshoot. For large load capacitance, the slew rate of the LT6274/ LT6275 can be limited by the output current available to charge the load capacitor according to: SR= ISC CL The Large-Signal Step Response with 10nF load shows the output slew rate being limited to 9V/µs by the output short-circuit current. Coaxial cable can be driven directly, but for best pulse fidelity the cable should be properly terminated by placing a resistor of value equal to the char- acteristic impedance of the cable (e.g. 50Ω) in series with the output. The other end of the cable should be termi - nated with the same value resistor to ground. Layout and Passive Components The LT6274 /LT6275 are easy to use and tolerant of less than ideal layouts. For maximum performance use a ground plane, short lead lengths, and RF-quality ceramic bypass capacitors (0.01µF to 0.1µF). For high drive cur - rent applications use low ESR bypass capacitors (1µF to 10µF ceramic or tantalum). The resistance of the parallel combination of the feedback resistor and gain setting resistor on the inverting input combines with the total capacitance on that node, CIN, to form a pole which can cause peaking or oscillations. If feedback resistors greater than 5k are used, a parallel capacitor of value CF > RG × CIN/RF should be used to cancel the input pole and optimize dynamic performance. For unity-gain applications where a large feedback resistor is used, C F should be greater than or equal to CIN. Power Dissipation The LT6274/LT6275 combine high speed and large out - put drive in a small package. Because of the wide sup - ply voltage range, it is possible to exceed the maximum junction temperature under certain conditions. Maximum junction temperature (TJ) is calculated from the ambient temperature (T A), the device’ s power dissipation (P D), and the thermal resistance of the device (θJA) as follows: TJ = TA + (PD × θJA) Worst case power dissipation occurs at the maximum supply current and when the output voltage is at 1/2 of either V+ or V – (on split rails), or at the maximum out - put swing (if less than 1/2 of the rail voltage). Therefore P DMAX (per amplifier) is: PDMAX = (V+ – V–)(ISMAX) + (V+/2)2/RL Example: For an LT6274 with thermal resistance of 215°C/W , operating on ±15V supplies and driving a 1kΩ load to 7.5V, the maximum power dissipation is calculated to be: PDMAX = (30V)(2.3mA) + (7.5V)2/1kΩ = 125mW This leads to a die temperature rise above ambient of: TRISE = (125mW)(215°C/W) = 27°C This implies that the maximum ambient temperature at which the LT6274 should operate under the above condi- tions is: TA = 150°C – 27°C = 123°C APPLICATIONS INFORMATION

moments of the exponential response. rate limited despite the very high excursion. slew rate is 423V/μs; measurement shows 460V/μs. stays constant for all input amplitudes.

6275 TA06

6275 TA07

Figure 1. LT6275 Configured in a Noninverting Gain of AV = +11V/V Figure 2. Noninverting Amplifier Step Response (AV = +11V/V)

tively low power dissipation. needs merely to drive the noninverting input. benefits from using the L T6275 as a slew enhancer . Larger R2 increases the local gain taken by the LTC6252.

6275 TA08

the gain that has to be taken in the L T6275. is powered up from split ±15V supplies. Figure 3. Composite Amplifier Using

amplifier is higher (and thus has a lower τo), as intended. HD3 were measured to be –55dBc/–47dBc, respectively.

6275 TA09

Figure 4. Composite Amplifier Step Response Figure 5. Composite Amplifier Step Response at

6275 TA12

6275 TA14

6275 TA15

Figure 6. Composite Amplifier Closed-Loop Figure 7. Composite Amplifier Supply

6275faFor more information www.linear.com/LT6275 PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/LT6274#packaging for the most recent package drawings. 1.50 – 1.75 (NOTE 4)2.80 BSC 0.30 – 0.45 TYP

5 PLCS (NOTE 3)

DATUM ‘A’ 0.09 – 0.20 (NOTE 3) S5 TSOT-23 0302 PIN ONE

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 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 # 05-08-1635)

6275fa For more information www.linear.com/LT6275 PACKAGE DESCRIPTION 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) Please refer to http://www.linear .com/product/LT6275#packaging for the most recent package drawings.

6275faFor more information www.linear.com/LT6275

REVISION HISTORY

REV DATE DESCRIPTION PAGE NUMBER A 12/17 Added LT6274 Updated Power Dissipation section All Information furnished by Analog Devices is believed to be accurate and reliable. However , no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

6275fa  ANALOG DEVICES, INC. 2017 LT 1217 REV A • PRINTED IN USA www.linear.com/LT6275 For more information www.linear.com/LT6275 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1351/LT1352/LT1353 Single/Dual/Quad 3MHz, 200V/µs, C-Load Amplifiers 250µA Supply Current, 600µV Max V OS, 5V to 30V Supply Operation LT1354/LT1355/LT1356 Single/Dual/Quad 12MHz, 400V/μs, C-Load Amplifiers 1mA Supply Current, 800µV Max V OS, 5V to 30V Supply Operation LT1357/LT1358/LT1359 Single/Dual/Quad 25MHz, 600V/μs, C-Load Amplifiers 2mA Supply Current, 600µV Max V OS, 5V to 30V Supply Operation LT1360/LT1361/LT1362 Single/Dual/Quad 50MHz, 800V/μs, C-Load Amplifiers 4mA Supply Current, 1mV Max V OS, 5V to 30V Supply Operation LT1363/LT1364/LT1365 Single/Dual/Quad 70MHz, 1000V/μs, C-Load Amplifiers 6.3mA Supply Current, 1.5mV Max V OS, 5V to 30V Supply Operation LT1812/LT1813/LT1814 Single/Dual/Quad 100MHz, 750V/μs Op Amps 3mA Supply Current, 1.5mV Max V OS, 4V to 11V Supply Operation LTC6261/LTC6262/LTC6263 Single/Dual/Quad 30MHz, 7V/µs Op Amps 240µA Supply Current, 400µV Max VOS, 1.8V to 5.25V Supply Operation LTC6246/LTC6247/LTC6248 Single/Dual/Quad 180MHz, 90V/µs Op Amps 0.95mA Supply Current, 500µV Max VOS, 2.5V to 5.25V Supply Operation LTC6252/LTC6253/LTC6254 Single/Dual/Quad 720MHz, 280V/µs Op Amps 3.3mA Supply Current, 350µV Max VOS, 2.5V to 5.25V Supply Operation TYPICAL APPLICATION 100pF 10µF OUTIN + LT1012 LTC2054HV LTC2756 RCOMRINROFS REF RFB IOUT1 VOUT IOUT2 GND VDD LDAC CLR VOSADJ GEADJ M-SPAN 10k 1µF 15V –15V

6275 TA13

0.1µF 12V LTC6655-5 10k 10k CS/LD SDI SCK SRO 12 11 10 9 SPI BUS 27, 28 2351 6, 8, 13, 15, 16, 24 10k –5V LTC6240HV –5V – 1/2 LT6275 15V –15V 10Ω CCOMP 5pF 4.02k 1µF Composite Amplifier Provides 18-Bit Precision and Fast Settling DAC with Composite Amplifier Output Response (Varying Compensation Capacitance) C COMP 100pF 68pF 30pF 22pF 15pF 10pF TIME (µs) –10 OUTPUT RESPONSE (V)