LT1024 Dual, Matched Picoampere, Microvolt Input, Low Noise Op Amp FEATURES DESCRIPTIO Guaranteed Offset Voltage: 50V Max The LT 1024 dual, matched internally compensated Guaranteed Bias Current: universal precision operational amplifier can be used in 25C: 120pA Max practically all precision applications requiring multiple op 55C to 125C: 700pA Max amps. The LT1024 combines picoampere bias currents Guaranteed Drift: 1.5V/C Max (which are maintained over the full 55C to 125C Low Noise, 0.1Hz to 10Hz: 0.5V temperature range), microvolt offset voltage (and low drift P-P Guaranteed Supply Current: 600A Max with time and temperature), low voltage and current Guaranteed CMRR: 112dB Min noise and low power dissipation. Extremely high Guaranteed PSRR: 112dB Min common mode and power supply rejection ratios, Guaranteed Voltage Gain with 5mA Load Current practically immeasurable warm-up drift, and the ability to Guaranteed Matching Characteristics deliver 5mA load current with a voltage gain of a million, round out the LT1024s superb precision specifications. U Tight matching is guaranteed on offset voltage, APPLICATIO S noninverting bias currents and common mode and power Strain Gauge Signal Conditioner supply rejections. Dual Limit Precision Threshold Detection The all-around excellence of the LT1024 eliminates the Charge Integrators necessity of the time-consuming error analysis procedure Wide Dynamic Range Logarithmic Amplifiers of precision system design in many dual applications the Light Meters LT1024 can be stocked as the universal dual op amp in the Low Frequency Active Filters 14-pin DIP configuration. Standard Cell Buffers For a single op amp with similar specifications, see the Thermocouple Amplifiers LT1012 data sheet for a single supply dual precision op , LTC and LT are registered trademarks of Linear Technology Corporation. amp in the 8-pin configuration, see the LT1013 data sheet. TYPICAL APPLICATIO Input Bias Current vs Temperature Two Op Amp Instrumentation Amplifier 100 R5 R4 2.2k 100k R1* R2 50 100k 10k UNDERCANCELLED UNIT 0 3 R3 OVERCANCELLED UNIT 10k 13 10 1/2 LT1024 50 4 6 + 1/2 LT1024 OUTPUT 11 INPUTS + 100 + TYPICAL PERFORMANCE: 150 OFFSET VOLTAGE = 20V R4 1 R2 R3 R2 + R3 50 25 0 25 50 75 100 125 GAIN = 1 + ()++ ~ 100 ~ BIAS CURRENT = 30pA R3 2 R1 R4 R5 TEMPERATURE (C) OFFSET CURRENT = 30pA LTC1024 TA02 * TRIM FOR COMMON-MODE REJECTION TRIM FOR GAIN LT1024 TA01 1024fa 1 INPUT BIAS CURRENT (pA) U ULT1024 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW ORDER Supply Voltage ...................................................... 20V + NULL (A) 1 14 V (A) PART NUMBER Differential Input Current (Note 2) ...................... 10mA NULL (A) 2 13 OUT (A) Input Voltage ......................................................... 20V LT1024ACN IN (A) 3 12 V (A) A Output Short Circuit Duration .......................... Indefinite +IN (A) 4 11 +IN (B) LT1024CN B Operating Temperature Range V (B) 5 10 IN (B) LT1024AM/LT1024M (OBSOLETE).....55C to 125C OUT (B) 6 9 NULL (B) LT1024AC/LT1024C ................................ 0C to 70C + V (B) 7 8 NULL (B) Storage Temperature Range ................. 65C to 150C N PACKAGE Lead Temperature (Soldering, 10 sec).................. 300C 14-PIN PDIP T = 100C, = 100C/W, = 60C/W (N) JMAX JA JC NOTE: DEVICE MAY BE OPERATED EVEN IF INSERTION IS REVERSED THIS IS DUE TO INHERENT SYMMETRY OF PIN LOCATIONS OF AMPLIFIERS A AND B (NOTE 3) D PACKAGE ORDER 14-PIN SIDE BRAZED (HERMETIC) PART NUMBER T = 150C, = 100C/W, = 60C/W (D) JMAX JA JC LT1024AMD LT1024MD OBSOLETE PACKAGE Consider the N14 Package as an Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS Individual Amplifiers. V = 15V, V = 0V, T = 25C unless otherwise noted. S CM A LT1O24AM/LT1O24AC LT1024M/LT1O24C SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS V Input Offset Voltage 15 50 20 100 V OS Long Term Input Offset Voltage Stability 0.3 0.3 V/month I Input Offset Current 20 100 25 180 pA OS I Input Bias Current 25 120 30 200 pA B e Input Noise Voltage 0.1Hz to 10Hz 0.5 0.5 V n P-P e Input Noise Voltage Density f = 10Hz (Note 4) 17 33 17 33 nV/Hz n O f = 1000Hz (Note 4) 14 24 14 24 nV/Hz O i Input Noise Current Density f = 10Hz 20 20 fA/Hz n O A Large-Signal Voltage Gain V = 12V, R 10k 250 2000 180 2000 V/mV VOL OUT L V = 10V, R 2k 150 1000 100 1000 V/mV OUT L CMRR Common Mode Rejection Ratio V = 13.5V 112 132 108 132 dB CM PSRR Power Supply Rejection Ratio V = 2V to 20V 112 132 108 132 dB S Input Voltage Range 13.5 14.0 13.5 14.0 V V Output Voltage Swing R = 10k 13 14 13 14 V OUT L Slew Rate 0.1 0.2 0.1 0.2 V/s I Supply Current per Amplifier 380 600 380 700 A S 1024fa 2 + + U WWW