LT6274IS5#TRMPBF

LT6274/LT6275 90MHz, 2200V/µs 30V Low Power Op Amps FEATURES DESCRIPTION 2200V/μs Slew Rate nn 90MHz –3dB Bandwidth (A = +1) V nn 40MHz Gain-Bandwidth Product nn 1.6mA Supply Current per Amplifier nn C-Load™ Op Amp Drives All Capacitive Loads nn ±4.5V to ±16V Operating Supply Range nn Unity-Gain Stable nn 10nV/√Hz Input Noise Voltage nn 400µV Maximum Input Offset Voltage nn 500nA Maximum Input Bias Current nn 30nA Maximum Input Offset Current nn ±13.25V Minimum Output Swing into 1k (±15V Supply) nn ±3.5V Minimum Output Swing into 500Ω (±5V Supply) nn 74dB Minimum Open-Loop Gain, R = 1k L nn 40ns Settling Time to 1%, 10V Step nn Specified at ±5V and ±15V nn Single in 5-Lead TSOT-23 Package nn Dual in 8-Lead MSOP Package 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 impedance 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 systems. 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 making them useful in buffer or cable driving applications. nn 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. All registered trademarks and trademarks are the property of their respective owners. All other trademarks are the property of their respective owners. Wideband Large Signal Amplification Cable Drivers nn Buffers nn Automated Test Equipment nn Data Acquisition Systems nn High Fidelity Video and Audio Amplification nn nn TYPICAL APPLICATION Undistorted Output Swing vs Frequency 30 Wideband Large Signal Amplification + 10V VIN –10V 1k 10V LT6274 VOUT – –10V –15V 1k AV = –1 FPBW = 3MHz 6275 TA01 OUTPUT VOLTAGE (VP-P) 25 15V AV = –1 20 15 10 AV = –10 AV = +1 5 VS = ±15V RL = 1k 1% MAX DISTORTION 0 100k 1M 10M FREQUENCY (Hz) 100M 6275 G31 6275fa For more information www.linear.com/LT6275 1 LT6274/LT6275 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ – V–)....................................................................34V Differential Input Voltage (Transient Only) (Note 2)......................................... ±10V Input Voltage....................................................... V– to V+ Input Current (+IN, –IN) (Note 3)................................................ ±10mA Output Current (Note 12)................................115mARMS Output Short-Circuit Current Duration (Note 4)...........................................Thermally Limited Operating Temperature Range (Note 5) LT6274I/LT6275I...................................–40°C to 85°C LT6274H/LT6275H.............................. –40°C to 125°C Specified Temperature Range (Note 6) LT6274I/LT6275I...................................–40°C to 85°C LT6274H/LT6275H.............................. –40°C to 125°C Maximum Junction Temperature........................... 150°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10 sec).................... 300°C PIN CONFIGURATION TOP VIEW – + OUTA –INA +INA V– +IN 3 4 –IN – + 8 7 6 5 V+ OUTB –INB +INB MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, qJA = 163°C/W S5 PACKAGE 5-LEAD PLASTIC TSOT-23 θJA = 215°C/W ORDER INFORMATION 1 2 3 4 + – V– 2 TOP VIEW 5 V+ OUT 1 http://www.linear.com/product/LT6275#orderinfo TUBE TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT6274IS5#PBF LT6274IS5 #TRPBF LTHCY 5-Lead Plastic TSOT-23 –40°C to 85°C LT6274HS5#PBF LT6274HS5 #TRPBF LTHCY 5-Lead Plastic TSOT-23 –40°C to 125°C LT6275IMS8#PBF LT6275IMS8 #TRPBF LTFYV 8-Lead Plastic MSOP –40°C to 85°C LT6275HMS8#PBF LT6275HMS8 #TRPBF LTFYV 8-Lead Plastic MSOP –40°C to 125°C *The temperature grade is identified by a label on the shipping container. Consult LTC 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. 2 6275fa For more information www.linear.com/LT6275 LT6274/LT6275 ELECTRICAL CHARACTERISTICS 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 VOS CONDITIONS MIN Input Offset Voltage (Note 7) TYP MAX UNITS ±0.15 ±0.4 ±1.2 mV mV ±4 ±10 µV/°C ±100 ±500 ±1000 nA nA ±3 ±30 ±50 nA nA l ∆VOS/∆T Input Offset Voltage Drift (Note 8) IB Input Bias Current l l IOS Input Offset Current l en Input Voltage Noise Density Low Frequency Integrated Voltage Noise 1/f 1/f Noise Corner Frequency f = 1kHz 10 nV/√Hz 0.1Hz to 10Hz 1 µVP-P Voltage Noise Current Noise 30 70 Hz Hz in Input Current Noise Density f = 1kHz RIN Input Resistance Common Mode, VCM = ±12V, VS = ±15V Differential Mode CIN Input Capacitance Common Mode Differential Mode VINCM Input Voltage Range + (Note 9) VS = ±15V VS = ±5V l l Input Voltage Range – (Note 9) VS = ±15V VS = ±5V l l CMRR Common Mode Rejection Ratio VS = ±15V, VCM = ±12V VS = ±5V, VCM = ±2.5V l l 90 80 110 102 PSRR Power Supply Rejection Ratio VS = ±4.5V to ±16V l 90 115 VS Supply Voltage Range (Note 10) l 9 l 100 12 2.5 0.5 pA/√Hz 700 20 MΩ MΩ 3 0.4 pF pF 13.4 3.4 V V –13.2 –3.2 –12 –2.5 V V dB dB dB 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 74 68 90 84 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 ±35 ±30 mA mA ISC Output Short-Circuit Current VS = ±15V, VOUT = 0V, VIN = ±3V VS = ±5V, VOUT = 0V, VIN = ±3V l l ±35 ±30 ±90 ±80 mA mA IS Supply Current Per Amplifier, VS = ±15V 1.6 l SR Slew Rate (Note 11) VS = ±15V, AV = 1 VS = ±15V, AV = –1 VS = ±15V, AV = –2 VS = ±5V, AV = –2 FPBW Full Power Bandwidth VS = ±15V, 10V Peak, AV = –1, 1 gain configurations slows down the response, but increases the excursion. The resulting maximum slew rate remains the same. Figure 2 shows the output response to varying input step amplitudes. Note that none of the exponential responses is limited by the initial slew rate (which increases with increasing amplitude). The LT6274/LT6275 feature ample slew rate capability with low power consumption. Because the input stage architecture allows high slew rate with low input stage quiescent currents, the overall power consumption when amplifying pulses is very low; additional power is only drawn from the supplies during the highest slew rate moments of the exponential response. Since GBW of the LT6274/LT6275 is 40MHz, Equation (3) suggests that the maximum slew rate in a step response whose output swings 25V (implying VINPUTSTEP = 25/11 = 2.27V) is 571V/µs. The LT6274/LT6275 high slew 14 As a particular example, with AV = +11V/V, 15V output excursion, and 40 MHz GBW, Equation (3) predicts a maximum slew rate of 343V/μs. Measurement on the corresponding curve in Figure 2 shows 390V/μs, which is in good agreement with the prediction. As another example, with an 18.5V output excursion, the predicted maximum slew rate is 423V/μs; measurement shows 460V/μs. As the peak to peak voltage of the input step changes, the maximum initial slew rate changes. The 63% rise time of the closed loop response, however, does not change (as seen in Figure 2), because the closed loop bandwidth stays constant for all input amplitudes. 6275fa For more information www.linear.com/LT6275 LT6274/LT6275 TYPICAL APPLICATIONS Using the LT6274/LT6275 to Create a Composite Amplifier with High Gain, High Bandwidth and Large Output Signal Capability While the LT6274/LT6275 provide ample slew rate and large output swing capability, the GBW is not so large as to achieve high gain, high bandwidth, and high amplitude at the same time. The circuit of Figure 3 harnesses the high slew rate capability of the LT6275 by placing it under control of the LTC6252, an op amp with greater than 700MHz GBW. The LTC6252 offers high bandwidth at low supply current, but with limited slew rate and limited output swing (since it is a 5V op amp). By creating a composite amplifier adding the LT6275 as a high-voltage, high-slew secondary op amp, this composite amplifier enables large output swing at high frequencies with relatively low power dissipation. Circuit Description R4 and R1 realize inverting gain of –11V/V from VIN to VOUT. The LT6275 op amp drives the output based on whatever is commanded by the middle node, VMID. The LTC6252 is very fast relative to the LT6275. As a consequence, the LTC6252 controlling first stage can force the LT6275 output to move quickly by providing sufficient differential input voltage to the LT6275. With the inverting input of the LT6275 tied to a DC bias voltage, the LTC6252 needs merely to drive the noninverting input. Unlike the LTC6252, the LT6275 slew rate increases linearly with its differential input voltage. Hence, the LTC6252 benefits from using the LT6275 as a slew enhancer. reduces the LTC6252 phase shift, but it also adds to the gain burden of the LT6275. R2 was selected to take a gain of 2V/V in the LTC6252, implying a gain of 5.5V/V being taken in the LT6275. The 5.5V/V gain is required to translate the 5V maximum output swing of the LTC6252 to the 27.5V maximum output swing of the LT6275 (when operated at ±15V supplies). It may be possible to achieve even higher bandwidth in the composite amplifier if a high speed ±5V (rather than 5V, 0V) op amp replaces the LTC6252 as the first stage, with the resulting increased first-stage output swing lowering the gain that has to be taken in the LT6275. Capacitor C7 in Figure 3 is adjusted to create a favorable looking transient response. Figure 4 shows the transient response at the output of the LT6275 as C7 varies. C7 = 3pF was chosen. DC Biasing In the circuit of Figure 3, LTC6252 supplies were chosen to be 5V and 0V, which are more practical than split ±2.5V supplies. R5 and R6 form a resistive divider to bias the noninverting input of LTC6252 and the inverting input of LT6275 at the middle of this rail, 2.5V. Note that this approach results in the output of LT6275 having a DC offset of 2.5V, which reduces the potential peak to peak output excursion of the composite amplifier since LT6275 is powered up from split ±15V supplies. C1 1µ VIN R1 1k R4 C7 Optimizing the Loop Larger R2 increases the local gain taken by the LTC6252. Since the total gain is fixed by the global feedback around the composite amplifier (AV = –R4/R1 = –11V/V), raising the gain in the LTC6252 lowers the gain requirement of the LT6275, increasing the overall bandwidth of the composite amplifier. Care must be taken to not take too much gain in the LTC6252, as the reduction in the LTC6252 bandwidth and the resulting additional phase shift seen at the output of the LTC6252 can lower the stability margins of the composite amplifier. Conversely, smaller R2 R2 2k 11k 3p +15V 5V 5V LTC6252 1/2 LT6275 VMID –15V C2 1µ VOUT R3 10k R5 10k R6 10k 6275 TA08 C5 1µ Figure 3. Composite Amplifier Using LTC6252 and LT6275 (AV = –11V/V) 6275fa For more information www.linear.com/LT6275 15 LT6274/LT6275 TYPICAL APPLICATIONS Pulse Response 15 Sine Waves 9 OUTPUT VOLTAGE (V) 6 3 0 –3 –6 –9 –12 –15 200ns/DIV 6275 TA12 Figure 5. Composite Amplifier Step Response at Various Output Step Amplitudes (AV = –11V/V) 25 225 20 180 15 135 10 90 5 45 0 0 –5 –45 –10 –90 PHASE (DEG) The composite amplifier of Figure 3 was also tested with sine waves. Figure 6 shows the small signal closed-loop gain and phase response. Distortion was also evaluated for this circuit: for a 20VP-P output signal at 1MHz, HD2/ HD3 were measured to be –55dBc/–47dBc, respectively. These numbers are more impressive when considering the very low power dissipation of the composite amplifier, as illustrated in Figure 7. For example, for the 20VP-P/1MHz output condition mentioned above, the 5V rail supply current is 3.75mA, for 1/2 LT6275 the ±15V rails supply current is 2.2mA, resulting in a total power dissipation of 85mW. 12 GAIN (dB) Figure 5 shows the output step response of the composite amplifier (measured at the output of the LT6275) at many different amplitudes. At 15V output excursion, the initial slope is measured to be 725V/μs. This slope is faster than the 390V/μs measured with a 15V output excursion using the simple noninverting amplifier of Figure 1. According to Equation (3), this improvement has been made possible because the effective bandwidth of the composite amplifier is higher (and thus has a lower τo), as intended. –135 –15 –20 –25 0.1 GAIN PHASE –180 –225 100 1 10 FREQUENCY (MHz) 6275 TA14 Figure 6. Composite Amplifier Closed-Loop Gain/Phase vs Frequency 10 150 5 8 USING 1/2 LT6275 2 0 –2 SUPPLY CURRENT (mA) 8pF 5pF 3pF 1pF NO CAP 4 –4 –6 250ns/DIV 6275 TA09 Figure 4. Composite Amplifier Step Response vs LTC6252 Feedback Capacitance (AV = –11V/V) 16 120 3 90 2 60 5V SUPPLY CURRENT ±15V SUPPLY CURRENT TOTAL POWER 1 –8 –10 4 0 30 OUTPUT = 20VP–P 0 0.5 1 1.5 FREQUENCY (MHz) POWER (mW) OUTPUT VOLTAGE (V) 6 2 0 6275 TA15 Figure 7. Composite Amplifier Supply Current and Total Power Dissipation 6275fa For more information www.linear.com/LT6275 LT6274/LT6275 PACKAGE DESCRIPTION Please refer to http://www.linear.com/product/LT6274#packaging for the most recent package drawings. S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) 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 1.90 BSC S5 TSOT-23 0302 6275fa For more information www.linear.com/LT6275 17 LT6274/LT6275 PACKAGE DESCRIPTION Please refer to http://www.linear.com/product/LT6275#packaging for the most recent package drawings. MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev G) 0.889 ±0.127 (.035 ±.005) 5.10 (.201) MIN 3.20 – 3.45 (.126 – .136) 3.00 ±0.102 (.118 ±.004) (NOTE 3) 0.65 (.0256) BSC 0.42 ± 0.038 (.0165 ±.0015) TYP 8 7 6 5 0.52 (.0205) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 ±0.102 (.118 ±.004) (NOTE 4) 4.90 ±0.152 (.193 ±.006) DETAIL “A” 0° – 6° TYP GAUGE PLANE 0.53 ±0.152 (.021 ±.006) DETAIL “A” 1 2 3 4 1.10 (.043) MAX 0.86 (.034) REF 0.18 (.007) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) BSC 0.1016 ±0.0508 (.004 ±.002) MSOP (MS8) 0213 REV G 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 18 6275fa For more information www.linear.com/LT6275 LT6274/LT6275 REVISION HISTORY REV DATE DESCRIPTION A 12/17 Added LT6274 Updated Power Dissipation section PAGE NUMBER All 13 6275fa 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. For more information www.linear.com/LT6275 19 LT6274/LT6275 TYPICAL APPLICATION Composite Amplifier Provides 18-Bit Precision and Fast Settling 15V 12V IN LTC6655-5 + OUT LT1012 0.1µF 10µF – –15V 1 14 10k 23 10k 17 25 4 19 20 21 22 VDD ROFS 5 3 RIN RCOM 100pF 2 REF RFB LDAC IOUT1 27, 28 VOUT 1k 26 LTC2756 CLR 10k VOSADJ M-SPAN S0 – 1µF LTC2054HV S2 9 SDI SCK 10 11 SRO 15V + + 10Ω –5V CCOMP 1/2 LT6275 – –5V 5pF 1µF 6275 TA13 12 SPI BUS 1k 5V LTC6240HV + IOUT2 7 6, 8, 13, 15, 16, 24 GND S1 CS/LD 5V 10k GEADJ – –15V 4.02k DAC with Composite Amplifier Output Response (Varying Compensation Capacitance) 1k 14 12 OUTPUT RESPONSE (V) 10 8 6 4 CCOMP 2 100pF 68pF 30pF 22pF 15pF 10pF 0 –2 –4 –6 –8 –10 –2 –1 0 1 2 3 4 TIME (µs) 5 6 7 6275 TA14 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1351/LT1352/LT1353 Single/Dual/Quad 3MHz, 200V/µs, C-Load Amplifiers 250µA Supply Current, 600µV Max VOS, 5V to 30V Supply Operation LT1354/LT1355/LT1356 Single/Dual/Quad 12MHz, 400V/μs, C-Load Amplifiers 1mA Supply Current, 800µV Max VOS, 5V to 30V Supply Operation LT1357/LT1358/LT1359 Single/Dual/Quad 25MHz, 600V/μs, C-Load Amplifiers 2mA Supply Current, 600µV Max VOS, 5V to 30V Supply Operation LT1360/LT1361/LT1362 Single/Dual/Quad 50MHz, 800V/μs, C-Load Amplifiers 4mA Supply Current, 1mV Max VOS, 5V to 30V Supply Operation LT1363/LT1364/LT1365 Single/Dual/Quad 70MHz, 1000V/μs, C-Load Amplifiers 6.3mA Supply Current, 1.5mV Max VOS, 5V to 30V Supply Operation LT1812/LT1813/LT1814 Single/Dual/Quad 100MHz, 750V/μs Op Amps 3mA Supply Current, 1.5mV Max VOS, 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 20 6275fa LT 1217 REV A • PRINTED IN USA For more information www.linear.com/LT6275 www.linear.com/LT6275  ANALOG DEVICES, INC. 2017