LT1493CS#TR

LT1492/LT1493 5MHz, 3V/µs, Low Power Single Supply, Dual and Quad Precision Op Amps U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTION Gain-Bandwidth Product: 5MHz Typ Slew Rate: 3V/µs Typ Low Supply Current per Amplifier: 0.55mA Max Input Offset Voltage: 180µV Max Input Offset Voltage Drift: 3µV/°C Max Input Offset Current: 20nA Max Input Bias Current: 100nA Max Open-Loop Gain: 1500V/mV Min (VS = ±15V) Low Input Noise Voltage: 16.5nV/√Hz Low Input Noise Current: 0.14pA/√Hz Large Output Drive Current: 20mA Min Single Supply Operation Input Voltage Range Includes Ground Output Swings to Ground While Sinking Current Wide Supply Voltage Range: 2.5V to 36V Specified on 3.3V, 5V and ±15V Dual in 8-Pin PDIP and SO Package Quad in a Narrow 16-Pin SO Package The LT ®1492/LT1493 are dual/quad, low power, single supply precision op amps with 5MHz gain-bandwidth product, 3V/µs slew rate and only 450µA of quiescent supply current per amplifier. With a maximum input offset voltage of only 180µV, the LT1492/LT1493 eliminate trims in most systems while providing high frequency performance not usually found in low power single supply amplifiers. The LT1492/LT1493 will operate on any supply greater than 2.5V and less than 36V total, and are specified on single 3.3V, single 5V and ±15V supplies. Even with their low quiescent supply current the minimum output drive is 20mA, ideal for driving low impedance loads. The inputs can be driven beyond the supplies without damage or phase reversal of the output. The low operating voltage and wide input and output range make the LT1492/ LT1493 amplifiers ideal for battery-powered applications. For applications requiring faster precision single supply amplifiers, see the 14MHz, 7V/µs LT1211/LT1212, the 28MHz, 12V/µs LT1213/LT1214 or the 23MHz, 50V/µs LT1215/LT1216. U APPLICATIONS ■ ■ ■ Battery-Powered Systems Portable Instrumentation Active Filters Photodiode Amplifiers DAC Current to Voltage Amplifiers , LTC and LT are registered trademarks of Linear Technology Corporation. U ■ Distribution of Offset Voltage Drift with Temperature TYPICAL APPLICATION 50 Precision AC to DC Converter (Full Wave Rectifier and Filter) 4.99k + 5V 10k VIN – 1/2 LT1492 15k – + VOUT DC 10µF 10k 1/2 LT1492 + 10k 6.49k VS = 5V, 0V < 1% ERROR FROM 100mV TO 1V, f = 1kHz 10% ERROR AT 10mV, f = 1kHz 1% ERROR AT 5kHz, VIN = 100mVRMS 10% ERROR AT 30kHz, VIN = 100mVRMS 1492/93 TA01 PERCENT OF UNITS (%) 40 VS = 5V, 0V LT1492 N8, S8 PACKAGES LT1493 S16 PACKAGE 30 20 10 0 – 2.5 – 2 –1.5 –1 – 0.5 0 0.5 1 1.5 2 2.5 OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C) 1492/93 G02 1 LT1492/LT1493 W W U W ABSOLUTE MAXIMUM RATINGS Total Supply Voltage (V + to V –) .............................. 36V Input Current ...................................................... ±15mA Output Short-Circuit Duration (Note 1) ......... Continuous Operating Temperature Range ................ – 40°C to 85°C Specified Temperature Range (Note 2) .....– 40°C to 85°C Junction Temperature ........................................... 150°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C W U U PACKAGE/ORDER INFORMATION ORDER PART NUMBER TOP VIEW OUT A –IN A 2 +IN A 3 V – 8 V+ 1 LT1492CN8 LT1492CS8 7 OUT B A B 6 –IN B 5 +IN B 4 N8 PACKAGE 8-LEAD PDIP S8 PACKAGE 8-LEAD PLASTIC SO S8 PART MARKING TJMAX = 150°C, θJA = 130°C/ W (N8) TJMAX = 150°C, θJA = 190°C/ W (S8) 1492 ORDER PART NUMBER TOP VIEW 16 OUT D OUT A 1 –IN A 2 +IN A 3 V+ 4 +IN B 5 –IN B 6 OUT B 7 10 OUT C NC 8 9 A D 15 –IN D LT1493CS 14 +IN D 13 V – B 12 +IN C C 11 –IN C NC S PACKAGE 16-LEAD PLASTIC SO TJMAX = 150°C, θJA = 150°C/ W Consult factory for Industrial and Military grade parts. 5V ELECTRICAL CHARACTERISTICS VS = 5V, 0V; VCM = 0.5V, VOUT = 0.5V, TA = 25°C, unless otherwise noted. SYMBOL PARAMETER TYP MAX UNITS VOS Input Offset Voltage CONDITIONS MIN 100 180 µV ∆VOS ∆Time Long-Term Input Offset Voltage Stability 0.6 IOS Input Offset Current 5 20 nA IB Input Bias Current 50 100 nA µV/Mo Input Noise Voltage 0.1Hz to 10Hz 330 nVP-P en Input Noise Voltage Density fO = 10Hz fO = 1000Hz 17.3 16.5 nV/√Hz nV/√Hz in Input Noise Current Density fO = 10Hz fO = 1000Hz 0.78 0.14 pA/√Hz pA/√Hz Input Resistance (Note 3) Differential Mode Common Mode 10 40 800 MΩ MΩ Input Capacitance f = 1MHz 10 pF 3.4 0 3.60 –0.25 V V Input Voltage Range CMRR Common Mode Rejection Ratio VCM = 0V to 3.4V 86 102 dB PSRR Power Supply Rejection Ratio VS = 2.5V to 12.5V 90 110 dB 2 LT1492/LT1493 5V ELECTRICAL CHARACTERISTICS VS = 5V, 0V; VCM = 0.5V, VOUT = 0.5V, TA = 25°C, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP AVOL Large-Signal Voltage Gain VO = 0.05V to 3.7V, RL = 2k 175 350 V/mV Maximum Output Voltage Swing (Note 4) Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA 4.2 4.1 3.0 4.35 4.25 3.15 V V V Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA 0.003 0.062 0.362 ±20 MAX 0.006 0.075 0.500 ±60 UNITS V V V IO Maximum Output Current (Note 8) SR Slew Rate AV = – 2 1.8 V/µs GBW Gain-Bandwidth Product f = 100kHz 4.5 MHz IS Supply Current per Amplifier Minimum Supply Voltage mA 425 550 2.1 2.5 µA V Full Power Bandwidth AV = 1, VO = 2.5VP-P 150 kHz t r, t f Rise Time, Fall Time AV = 1, 10% to 90%, VO = 100mV 100 ns OS Overshoot AV = 1, VO = 100mV 20 % t PD Propagation Delay AV = 1, VO = 100mV 100 ns tS Settling Time 0.01%, AV = 1, ∆VO = 2V 2.6 µs Open-Loop Output Resistance IO = 0mA, f = 2MHz Total Harmonic Distortion AV = 1, VO = 1VRMS, f = 20Hz to 20kHz THD 130 Ω 0.005 % VS = 5V, 0V; VCM = 0.5V, VOUT = 0.5V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. SYMBOL PARAMETER VOS Input Offset Voltage VOS ∆T CONDITIONS MIN TYP MAX UNITS ● 120 280 µV Input Offset Voltage Drift (Note 3) ● 1 3 µV/°C IOS Input Offset Current ● 5 25 nA IB Input Bias Current ● 55 110 nA Input Voltage Range ● ● 3.4 0 3.55 – 0.15 V V CMRR Common Mode Rejection Ratio VCM = 0V to 3.4V ● 84 102 dB PSRR Power Supply Rejection Ratio VS = 2.5V to 12.5V ● 90 110 dB AVOL Large-Signal Voltage Gain VO = 0.05V to 3.7V, RL = 2k ● 140 250 V/mV Maximum Output Voltage Swing (Note 4) Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA ● ● ● 4.1 4.0 2.9 4.25 4.15 3.05 V V V Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA ● ● ● 0.004 0.070 0.390 0.007 0.085 0.525 V V V ● 470 650 µA IS Supply Current per Amplifier 3 LT1492/LT1493 5V ELECTRICAL CHARACTERISTICS VS = 5V, 0V; VCM = 0.5V, VOUT = 0.5V, – 40°C ≤ TA ≤ 85°C, unless otherwise noted. (Note 2) SYMBOL PARAMETER TYP MAX UNITS VOS Input Offset Voltage ● 150 325 µV VOS ∆T Input Offset Voltage Drift (Note 3) ● 1 3 µV/°C IOS Input Offset Current ● 5 40 nA IB Input Bias Current ● 55 130 nA Input Voltage Range ● ● 3.4 0 3.5 – 0.1 V V 80 90 dB CMRR CONDITIONS MIN Common Mode Rejection Ratio VCM = 0V to 3.4V ● PSRR Power Supply Rejection Ratio VS = 2.5V to 12.5V ● 90 110 dB AVOL Large-Signal Voltage Gain VO = 0.05V to 3.7V, RL = 2k ● 140 220 V/mV Maximum Output Voltage Swing (Note 4) Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA ● ● ● 3.95 3.85 2.75 4.15 4.05 2.95 V V V Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA ● ● ● 0.005 0.073 0.400 0.008 0.095 0.575 V V V ● 480 700 µA IS Supply Current per Amplifier ±15V ELECTRICAL CHARACTERISTICS VS = ±15V, VCM = 0V, VOUT = 0V, TA = 25°C, unless otherwise noted. SYMBOL PARAMETER TYP MAX UNITS VOS Input Offset Voltage CONDITIONS 120 450 µV IOS Input Offset Current 5 20 nA IB Input Bias Current 45 100 nA Input Voltage Range MIN 13.4 – 15.0 13.6 – 15.2 V V CMRR Common Mode Rejection Ratio VCM = –15V to 13.4V 86 102 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±16V 90 113 dB AVOL Large-Signal Voltage Gain VO = ±10V, RL = 5k 1500 6500 V/mV Maximum Output Voltage Swing Output High, ISOURCE = 15mA Output Low, ISINK = 15mA 12.9 – 14.4 13.15 – 14.6 IO Maximum Output Current (Note 8) ±20 SR Slew Rate AV = – 2, (Note 5) 2 3 V/µs GBW Gain-Bandwidth Product f = 100kHz 3 5 MHz IS Supply Current per Amplifier Channel Separation tS 4 ±55 500 VO = ±10V, RL = 5k 128 mA 800 140 ±1.4 Minimum Supply Voltage V V µA dB ±2 V Full Power Bandwidth AV = 1, VO = 20VP-P 30 kHz Settling Time 0.01%, AV = 1, ∆VO = 10V 5.8 µs LT1492/LT1493 ±15V ELECTRICAL CHARACTERISTICS VS = ±15V, VCM = 0V, VOUT = 0V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. SYMBOL PARAMETER VOS Input Offset Voltage VOS ∆T CONDITIONS MIN TYP MAX UNITS ● 160 550 µV Input Offset Voltage Drift (Note 3) ● 1 3 µV/°C IOS Input Offset Current ● 10 30 nA IB Input Bias Current ● 55 120 nA Input Voltage Range ● ● 13.4 – 15.0 13.5 – 15.1 V V CMRR Common Mode Rejection Ratio VCM = – 15V to 13.4V ● 84 101 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±16V ● 90 108 dB AVOL Large-Signal Voltage Gain VO = ±10V, RL = 5k ● 1200 4000 V/mV Maximum Output Voltage Swing Output High, ISOURCE = 15mA Output Low, ISINK = 15mA ● ● 12.7 – 14.2 13.0 – 14.6 IS Supply Current per Amplifier ● V V 600 930 µA TYP MAX UNITS µV VS = ±15V, VCM = 0V, VOUT = 0V, – 40°C ≤ TA ≤ 85°C, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage ● 180 650 VOS ∆T Input Offset Voltage Drift (Note 3) ● 1 3 µV/°C IOS Input Offset Current ● 10 50 nA IB Input Bias Current ● 55 150 nA Input Voltage Range ● ● 13.4 – 15.0 13.45 – 15.05 V V CMRR Common Mode Rejection Ratio VCM = – 15V to 13.4V ● 82 101 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±16V ● 90 108 dB AVOL Large-Signal Voltage Gain VO = ±10V, RL = 5k ● 1000 3500 V/mV Maximum Output Voltage Swing Output High, ISOURCE = 15mA Output Low, ISINK = 15mA ● ● 12.5 –14.1 12.9 –14.6 V V IS Supply Current per Amplifier ● 620 1000 µA 5 LT1492/LT1493 3.3V ELECTRICAL CHARACTERISTICS VS = 3.3V, 0V; VCM = 0.5V, VOUT = 0.5V, TA = 25°C, unless otherwise noted. (Note 6) SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS MIN Input Voltage Range (Note 7) Maximum Output Voltage Swing Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA MAX UNITS 100 180 µV 1.7 0 1.9 – 0.2 V V 2.50 2.40 1.30 2.65 2.55 1.45 V V V Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA IO TYP 0.003 0.062 0.362 Maximum Output Current 0.006 0.075 0.500 V V V ±20 ±50 MIN TYP MAX UNITS 120 280 µV mA VS = 3.3V, 0V; VCM = 0.5V, VOUT = 0.5V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. (Note 6) SYMBOL PARAMETER VOS Input Offset Voltage ● Input Voltage Range (Note 7) ● ● 1.7 0 1.8 – 0.1 V V Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA ● ● ● 2.4 2.3 1.2 2.55 2.45 1.35 V V V Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA ● ● ● Maximum Output Voltage Swing CONDITIONS 0.004 0.070 0.390 0.007 0.085 0.525 V V V TYP MAX UNITS 150 325 µV VS = 3.3V, 0V; VCM = 0.5V, VOUT = 0.5V, – 40°C ≤ TA ≤ 85°C, unless otherwise noted. (Notes 2, 6) SYMBOL PARAMETER VOS Input Offset Voltage ● Input Voltage Range (Note 7) ● ● 1.7 0 1.75 – 0.05 V V Output High, No Load Output High, ISOURCE = 1mA Output High, ISOURCE = 15mA ● ● ● 2.25 2.15 1.05 2.45 2.35 1.25 V V V Output Low, No Load Output Low, ISINK = 1mA Output Low, ISINK = 15mA ● ● ● Maximum Output Voltage Swing CONDITIONS The ● denotes specifications that apply over the full operating temperature range. Note 1: A heat sink may be required to keep the junction temperature below absolute maximum when the output is shorted indefinitely. Note 2: The LT1492/LT1493 are designed, characterized and expected to meet these extended temperature limits, but are not tested at – 40°C and 85°C. Guaranteed I grade parts are available. Consult factory. Note 3: This parameter is not 100% tested. Note 4: Guaranteed by correlation to VS = 3.3V and VS = ±15V tests. 6 MIN 0.005 0.073 0.400 0.008 0.095 0.575 Note 5: Slew rate is measured between ±5V on an output swing of ±10V on ±15V supplies. Note 6: Most LT1492/LT1493 electrical characteristics change very little with supply voltage. See the 5V tables for characteristics not listed in the 3.3V table. Note 7: Guaranteed by correlation to VS = 5V and VS = ±15V tests. Note 8: Guaranteed by correlation to VS = 3.3V tests. V V V LT1492/LT1493 U W TYPICAL PERFORMANCE CHARACTERISTICS Distribution of Offset Voltage Drift with Temperature Distribution of Input Offset Voltage 50 VS = 5V, 0V LT1492 N8, S8 PACKAGES LT1493 S16 PACKAGE VS = 5V, 0V LT1492 N8, S8 PACKAGES LT1493 S16 PACKAGE 40 30 PERCENT OF UNITS (%) PERCENT OF UNITS (%) 35 25 20 15 10 Distribution of Input Offset Voltage 40 30 20 10 5 25 20 15 10 1492/93 G02 80 VS = ±15V 60 40 40 GAIN 30 VS = 5V 20 20 0 10 – 20 0 – 40 VS = ±2.5V –10 VS = ±15V –20 1k 10k PHASE SHIFT (DEG) 50 100k 1M FREQUENCY (Hz) – 60 – 80 10M 4 TA = – 55°C 5.0 4.5 TA = 125°C 4.0 3.5 70 TA = 125°C 60 50 TA = – 55°C TA = 25°C 40 5 10 20 TOTAL SUPPLY VOLTAGE (V) 1 – 50 – 25 30 40 TA = 125°C AV = –1 OUTPUT SWING (VP-P) OVERSHOOT (%) TA = – 55°C 50 40 AV = 1 AV = 5 20 AV = 10 10 8 12 16 20 24 28 32 TOTAL SUPPLY VOLTAGE (V) 36 1492/93 G07 3 2 1 VS = ± 2.5V RL = 100k DISTORTION ≤ 1% 0 0 1 AV = 1 4 30 10 125 5 VS = ± 2.5V 60 TA = 25°C 100 Undistorted Output Swing vs Frequency, VS = ±2.5V 70 3 50 25 75 0 TEMPERATURE (°C) 1492/93 G06 Capacitive Load Handling 80 4 2 1492/93 G05 AV = –2 RL = 10k 0 VS = ±15V 30 1 Slew Rate vs Supply Voltage 2 3 VS = 5V 20 1492/93 G04 4 AV = – 2 RL = 10k TA = 25°C SLEW RATE (V/µs) 60 Slew Rate vs Temperature 5.5 PHASE MARGIN (DEG) 100 PHASE GAIN-BANDWIDTH PRODUCT (MHz) 120 70 1492/93 G03 Gain-Bandwidth Product, Phase Margin vs Supply Voltage Voltage Gain, Phase vs Frequency 80 0 – 400 –300 –200 –100 0 100 200 300 400 INPUT OFFSET VOLTAGE (µV) 0 – 2.5 – 2 –1.5 –1 – 0.5 0 0.5 1 1.5 2 2.5 OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C) 1492/93 G01 VOLTAGE GAIN (dB) 30 5 0 50 100 150 200 –200 –150 –100 – 50 0 INPUT OFFSET VOLTAGE (µV) SLEW RATE (V/µs) VS = ±15V LT1492 N8, S8 PACKAGES LT1493 S16 PACKAGE 35 PERCENT OF UNITS (%) 40 100 1000 CAPACITIVE LOAD (pF) 10000 1492/93 G08 1k 10k 100k FREQUENCY (Hz) 1M 1492/93 G09 7 LT1492/LT1493 U W TYPICAL PERFORMANCE CHARACTERISTICS Undistorted Output Swing vs Frequency, VS = ±15V AV = –1 20 15 10 5 0 VS = ±15V RL = 100k DISTORTION ≤ 1% 10k FREQUENCY (Hz) 1k 1 5000 VS = 5V, 0V VOUT = 3VP-P RL = 2k OPEN-LOOP VOLTAGE GAIN (V/mV) OUTPUT SWING (VP-P) 25 TOTAL HARMONIC DISTORTION AND NOISE (%) 30 AV = 1 Open-Loop Voltage Gain vs Supply Voltage Total Harmonic Distortion and Noise vs Frequency 0.1 0.01 AV = 10 AV = 1 0.001 100 10 1k 10k FREQUENCY (Hz) TA = 125°C 1000 0 0 4 8 12 16 20 24 28 32 36 40 TOTAL SUPPLY VOLTAGE (V) 1492/93 G12 5 1492/93 G13 2.5 Voltage Gain vs Load Resistance 100000 VS = 5V, 0V OPEN-LOOP VOLTAGE GAIN (V/mV) 4 POSITIVE OUTPUT SATURATION, V + – VOUT (V) INPUT, 5µV/DIV RL = 2k 2 3 OUTPUT (V) 2000 Positive Output Saturation Voltage vs Load Current RL = 5k 1 TA = 25°C 1492/93 G11 Open-Loop Gain, VS = 5V 0 3000 100k 1492/93 G10 TA = – 55°C 4000 0.0001 100k RL = 2k 2.0 1.5 1.0 T = –55°C A 0.5 TA = 125°C 0 – 0.001 – 0.01 TA = 25°C –1 – 10 – 0.1 LOAD CURRENT (mA) TA = 25°C 10000 VS = ±15V 1000 VS = 5V, 0V 100 10 – 100 0 2 4 6 8 LOAD RESISTANCE (kΩ) 1492/93 G15 1492/93 G14 Negative Output Saturation Voltage vs Load Current Open-Loop Gain, VS = ±15V RL = 5k – 10 0 OUTPUT (V) 10 1492/93 G16 Channel Separation vs Frequency 130 VS = 5V, 0V 100 10 TA = 125°C 110 100 90 80 70 TA = 25°C, – 55°C 1 0.001 60 0.01 0.1 1 10 LOAD CURRENT (mA) 100 1492/93 G17 8 VS = ±15V 120 CHANNEL SEPARATION (dB) RL = 2k NEGATIVE OUTPUT SATURATION (mV) INPUT, 5µV/DIV 1000 10 1k 10k 100k 1M FREQUENCY (Hz) 10M 1492/93 G18 LT1492/LT1493 U W TYPICAL PERFORMANCE CHARACTERISTICS Output Short-Circuit Current vs Temperature Output Impedance vs Frequency 1000 70 OUTPUT IMPEDANCE (Ω) VS = ± 2.5V SINKING 60 VS = ±15V SOURCING OR SINKING 50 40 5V Small-Signal Response VS = ± 2.5V 100 20mV/DIV VS = ± 2.5V SOURCING AV = 100 10 AV = 10 1 30 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 0.1 10k 100k 1M FREQUENCY (Hz) 1492/93 G19 10M 1492/93 G20 5V Large-Signal Response ±15V Small-Signal Response 2µs/DIV 1492/93 G22 20mV/DIV 500mV/DIV 5V Large-Signal Response 500mV/DIV VS = 5V AV = 1 1492/93 G21 500ns/DIV VS = 5V AV = 1 AV = 1 VS = 5V AV = – 1 RF = RG = 2k ±15V Large-Signal Response VS = ±15V AV = 1 1492/93 G23 2µs/DIV 1492/93 G24 500ns/DIV Settling Time to 1mV vs Output Step ±15V Large-Signal Response 10 VS = ±15V 8 5V/DIV OUTPUT STEP (V) 6 5V/DIV OUTPUT SHORT-CIRCUIT CURRENT (mA) 80 VS = ±15V AV = 1 5µs/DIV 1492/93 G25 VS = ±15V AV = – 1 RF = RG = 2k INVERTING 4 NONINVERTING 2 0 –2 –4 –6 5µs/DIV 1492/93 G26 NONINVERTING –8 INVERTING –10 0 1 3 4 2 SETTLING TIME (µs) 5 6 1492/93 G27 9 LT1492/LT1493 U W TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Temperature Supply Current vs Supply Voltage VS = ±15V 0.45 VS = 5V, 0V 0.35 0.25 – 50 – 25 0 50 75 25 TEMPERATURE (°C) 100 10 0.8 0.6 TA = 125°C 0.4 TA = 25°C TA = – 55°C 0.2 0 1 2 3 4 SUPPLY VOLTAGE (V) 1492/93 G28 4 2 VS = ± 2.5V 0 VS = ±15V –2 –4 –6 –10 5 10 20 30 40 50 60 70 80 90 100 TIME (SEC) 0 1492/93 G30 Input Bias Current vs Common Mode Voltage Common Mode Range vs Temperature V+ 20 VS = 5V, 0V VS = 5V, 0V 0 60 55 50 IOS 45 + IB – IB – 40 TA = – 55°C – 60 – 80 TA = 125°C –100 –120 –140 –160 V+ – 1 V+ – 2 V– + 2 V– TA = 25°C –180 35 COMMON MODE RANGE (V) INPUT BIAS CURRENT (nA) – 20 40 6 1492/93 G29 Input Bias Current vs Temperature 65 N8 PACKAGE RL = ∞ 8 –8 0 125 CHANGE IN OFFSET VOLTAGE (µV) 0.55 INPUT BIAS CURRENT (nA) Warm-Up Drift vs Time 1.0 SUPPLY CURRENT PER AMPLIFIER (mA) SUPPLY CURRENT PER AMPLIFIER (mA) 0.65 – 200 30 – 50 – 25 50 25 75 0 TEMPERATURE (°C) 100 – 220 125 0 2 3 1 COMMON MODE VOLTAGE (V) –1 2.0 1.8 1.6 VOLTAGE NOISE 14 1.4 12 1.2 10 1.0 8 0.8 6 0.6 4 0.4 CURRENT NOISE 2 0.2 0 10 100 1k FREQUENCY (Hz) 0 10k 1492/93 G34 10 100 COMMON MODE REJECTION RATIO (dB) INPUT NOISE VOLTAGE DENSITY (nV/√Hz) VS = ±15V TA = 25°C Common Mode Rejection Ratio vs Frequency INPUT NOISE CURRENT DENSITY (pA/√Hz) 16 25 50 75 0 TEMPERATURE (°C) 125 Input Referred Power Supply Rejection Ratio vs Frequency 120 VS = ± 2.5V 80 60 40 20 0 10k 100 1492/93 G33 POWER SUPPLY REJECTION RATIO (dB) Input Noise Current, Noise Voltage Density vs Frequency 20 – 25 1492/93 G32 1492/93 G31 18 V– – 1 – 50 4 VS = ±15V AV = 100 100 80 60 POSITIVE SUPPLY 40 NEGATIVE SUPPLY 20 100k 1M FREQUENCY (Hz) 10M 1492/93 G35 1k 10k 100k 1M FREQUENCY (Hz) 10M 1492/93 G26 LT1492/LT1493 U W U U APPLICATIONS INFORMATION Supply Voltage The LT1492/LT1493 op amps are fully functional and all internal bias circuits are in regulation with 2.1V of supply. The amplifiers will continue to function with as little as 1.6V, although the input common mode range and the phase margin are about gone. The minimum operating supply voltage is guaranteed by the PSRR tests that are done with the input common mode equal to 500mV and a minimum supply voltage of 2.5V. The positive supply pin of the LT1492/LT1493 should be bypassed with a small capacitor (about 0.01µF) within an inch of the pin. When driving heavy loads and for good settling time, an additional 4.7µF capacitor should be used. When using split supplies, the same is true for the negative supply pin. Power Dissipation The LT1492/LT1493 combine high speed and large output drive in small packages. Because of the wide supply voltage range, it is possible to exceed the maximum junction temperature under certain conditions. Maximum junction temperature (TJ) is calculated from the ambient temperature (TA) and power dissipation (PD) as follows: LT1492CN8: TJ = TA + (PD • 130°C/W) LT1492CS8: TJ = TA + (PD • 190°C/W) LT1493CS: TJ = TA + (PD • 150°C/W) Worst-case power dissipation occurs at the maximum supply current and when the output voltage is at 1/2 of either supply voltage (or the maximum swing if less than 1/2 supply voltage). For each amplifier PDMAX is: PDMAX = (V + – V –)(I + 2 SMAX) + (V /2) /RL Example: LT1493 at 70°C, VS = ±15V, RL = 1k PDMAX = (30V)(930µA) + (7.5V)2/1kΩ = 84.2mW TJMAX = 70°C + (4 • 84.2mW)(150°C/W) = 121°C Inputs Typically, at room temperature, the inputs of the LT1492/ LT1493 can common mode 400mV below ground (V –) and to within 1.2V of the positive supply with the amplifier still functional. However, the input bias current will shift as shown in the characteristic curves. For full precision performance, the common mode range should be limited between ground (V –) and 1.5V below the positive supply. When either of the inputs is taken below ground (V –) by more than about 700mV, that input current will increase dramatically. The current is limited by internal 100Ω resistors between the input pins and diodes to each supply. The output will remain low (no phase reversal) for inputs 1.3V below ground (V –). If the output does not have to sink current, such as in a single supply system with a 1k load to ground, there is no phase reversal for inputs up to 8V below ground. There are no clamps across the inputs of the LT1492/ LT1493 and therefore each input can be forced to any voltage between the supplies. The input current will remain constant at about 50nA over most of this range. When an input gets closer than 1.5V to the positive supply, that input current will gradually decrease to zero until the input goes above the supply, then will increase due to the previously mentioned diodes. If the inverting input is held more positive than the noninverting input by 200mV or more, while at the same time the noninverting input is within 300mV to ground (V –), then the supply current will increase by 1mA and the noninverting input current will increase to about 10µA. This should be kept in mind in comparator applications where the inverting input stays above ground (V –) and the noninverting input is at or near ground (V –). Output The output of the LT1492/LT1493 will swing to within 0.65V of the positive supply and to within 3mV of the negative supply with no load. Under loaded conditions see the Typical Performance curves for the output saturation voltage characteristics. The output of the LT1492/LT1493 has reverse-biased diodes to each supply. If the output is forced beyond either supply, unlimited currents will flow. If the current is transient and limited to several hundred milliamps, no damage will occur. 11 LT1492/LT1493 U W U U APPLICATIONS INFORMATION Feedback Components Comparator Applications Because the input currents of the LT1492/LT1493 are less than 100nA, it is possible to use high value feedback resistors to set the gain. However, care must be taken to insure that the pole that is formed by the feedback resistors and the input capacitance does not degrade the stability of the amplifier. For example, if a single supply, noninverting gain of 2 is set with two 62k resistors, the LT1492/LT1493 will probably oscillate. This is because the amplifier goes open-loop at 1MHz (6dB of gain) and has 50° of phase margin. The feedback resistors and the 10pF input capacitance generate a pole at 500kHz that introduces 63° of phase shift at 1MHz! The solution is simple, lower the values of the resistors or add a feedback capacitor of 10pF or more. Sometimes it is desirable to use an op amp as a comparator. When operating the LT1492/LT1493 on a single 3.3V or 5V supply, the output interfaces directly with most TTL and CMOS logic. The response time of the LT1492/LT1493 is a strong function of the amount of input overdrive as shown in the following photos. These amplifiers are unity-gain stable op amps and not fast comparators, therefore, the logic being driven may oscillate due to the long transition time. The output can be speeded up by adding 20mV or more of hysteresis (positive feedback), but the offset is then a function of the input direction. Comparator Response (+) 20mV, 10mV, 5mV, 2mV Overdrives Capacitive Loading Maximum Capacitive Load vs Load Current OUTPUT (V) 2 0 100 0 VS = 5V RL = ∞ SOURCING SINKING VS = ± 2.5V 1492/93 AI02 VS = ±15V 4 VS = ± 2.5V 100 VS = ±15V 10 1 10 LOAD CURRENT (mA) 1492/93 AI01 2 0 100 INPUT (mV) 0.1 100 0 VS = 5V RL = ∞ 12 20µs/DIV Comparator Response (–) 20mV, 10mV, 5mV, 2mV Overdrives 1000 OUTPUT (V) MAXIMUM CAPACITIVE LOAD (pF) 10000 4 INPUT (mV) The LT1492/LT1493 are optimized for low voltage, single supply operation. The Maximum Capacitive Load vs Load Current typical performance curve shows the circuit performance without any load resistance. When the output is sinking current or driving heavy loads with high supplies, capacitive load handling is degraded. 20µs/DIV 1492/93 AI02 LT1492/LT1493 W W SI PLIFIED SCHE ATIC V+ I1 I4 I3 I2 I6 I5 Q13 BIAS CM Q14 Q4 Q3 –IN Q15 +IN Q1 Q11 Q2 OUT RF Q12 Q7 CF Q10 Q8 Q5 Q9 Q6 Q16 CO I7 I8 CI V– 1492/93 SS U TYPICAL APPLICATIONS 1A Voltage-Controlled Current Source 1A Voltage-Controlled Current Sink V+ V+ 1Ω 1k V+ RL 1k 1k 200pF – VIN VIN 100Ω 1/2 LT1492 1k 1/2 LT1492 Si9430DY P-CHANNEL + – IOUT V IOUT = IN 1Ω tr < 1µs IOUT + 100Ω Si9410DY N-CHANNEL 100pF 1k RL V IOUT = IN 1Ω tr < 1µs 1492/93 TA05 1Ω 1492/93 TA06 Ground Current Sense Amplifier V+ 5V 0.1µF LOAD + 1/2 LT1492 IIN VO = 1V/A – 0.05Ω 1910Ω 100Ω OFFSET ≤ 3.6mA BANDWIDTH = 250kHz t r = 1µs 100pF 1492/93 TA07 13 LT1492/LT1493 U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. N8 Package 8-Lead PDIP (Narrow 0.300) (LTC DWG # 05-08-1510) 0.400* (10.160) MAX 8 7 6 5 1 2 3 4 0.255 ± 0.015* (6.477 ± 0.381) 0.300 – 0.325 (7.620 – 8.255) 0.065 (1.651) TYP 0.009 – 0.015 (0.229 – 0.381) ( +0.635 –0.381 0.125 (3.175) MIN 0.005 (0.127) MIN +0.025 0.325 –0.015 8.255 0.130 ± 0.005 (3.302 ± 0.127) 0.045 – 0.065 (1.143 – 1.651) ) 0.018 ± 0.003 (0.457 ± 0.076) 0.100 ± 0.010 (2.540 ± 0.254) 0.015 (0.380) MIN N8 0695 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 8 7 6 5 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) 1 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 0.016 – 0.050 0.406 – 1.270 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 14 0.014 – 0.019 (0.355 – 0.483) 2 3 4 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) TYP SO8 0996 LT1492/LT1493 U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. S Package 16-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.386 – 0.394* (9.804 – 10.008) 16 15 14 13 12 11 10 9 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) 1 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 2 3 4 5 6 0.053 – 0.069 (1.346 – 1.752) 0.014 – 0.019 (0.355 – 0.483) 8 0.004 – 0.010 (0.101 – 0.254) 0° – 8° TYP 0.016 – 0.050 0.406 – 1.270 7 0.050 (1.270) TYP S16 0695 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 15 LT1492/LT1493 U TYPICAL APPLICATION Single Supply 100kHz 4th Order Butterworth Filter Frequency Response 10 100pF 11.3k 6.81k VIN 330pF 0 5.23k – 5.23k 10.2k –10 –20 – 1/2 LT1492 + V+ 47pF 1/2 LT1492 1000pF VOUT + V +/2 1492/93 TA03 GAIN (dB) 6.81k –30 –40 –50 –60 –70 –80 –90 100 1k 10k 100k FREQUENCY (Hz) 1M 10M 1492/93 TA04 RELATED PARTS PART NUMBER ® DESCRIPTION COMMENTS High DC Accuracy, 10 µV VOS(MAX) , 100nV/ °C Drift, 1MHz GBW, 1V/ µs Slew Rate, Max Supply Current 2.2mA LTC 1152 Rail-to-Rail Input and Output, Zero-Drift Op Amp LT1211/LT1212 Dual/Quad 14MHz, 7V/ µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 275 µV VOS(MAX) , 6µV/°C Max Drift, Max Supply Current 1.8mA per Amplifier LT1213/LT1214 Dual/Quad 28MHz, 12V/ µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 275 µV VOS(MAX) , 6µV/°C Max Drift, Max Supply Current 3.5mA per Amplifier LT1215/LT1216 Dual/Quad 23MHz, 50V/ µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 450 Max Supply Current 6.6mA per Amplifier LT1366/LT1367 Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps 475 µV VOS(MAX) , 400kHz GBW, 0.13V/ µs Slew Rate, Max Supply Current 520 µA per Amplifier LT1490/LT1491 Dual/Quad Micropower, Rail-to-Rail Input and Output Op Amps Max Supply Current 50 µA per Amplifier, 200kHz GBW, 0.07V/ µs Slew Rate, Operates with Inputs 44V Above V – Independent of V + LT1498/LT1499 Dual/Quad Rail-to-Rail Input and Output Precision C-Load Op Amps TM µV VOS(MAX) , 475µV VOS(MAX) , 10MHz GBW, 6V/ µs Slew Rate, Max Supply Current 2.2mA per Amplifier C-Load is a trademark of Linear Technology Corporation. 16 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 ● (408) 432-1900 FAX: (408) 434-0507 ● TELEX: 499-3977 ● www.linear-tech.com 14923f LT/TP 1097 4K • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1997