LT1097 Low Cost, Low Power Precision Op Amp FEATURES DESCRIPTION n Offset Voltage 50m V Max LT 1097 achieves a new standard in combining low price n Offset Voltage Drift 1m V/ C Max and outstanding precision performance. n Bias Current 250pA Max On all operational amplifier data sheets, the specifications n Offset Current 250pA Max listed on the front page are for highly selected, expensive n Bias and Offset Current Drift 4pA/ C Max grades, while the specs for the low cost grades are buried n Supply Current 560m A Max deep in the data sheet. n 0.1Hz to 10Hz Noise 0.5m Vp-p, 2.2pAp-p n The LT1097 does not have any selected grades, the CMRR 115dB Min n outstanding specifications shown in the Features section Voltage Gain 117dB Min n are for its only grade. PSRR 114dB Min n Guaranteed Operation on Two NiCad Batteries The design effort of the LT1097 concentrated on optimiz- ing the performance of all precision specsat only 350m A U of supply current. Typical values are 10m V offset voltage, APPLICATIONS 40pA bias and offset currents, 0.2m V/ C and 0.4pA/ C n Replaces OP-07/OP-77/OP-97/OP-177/AD707/ drift. Common mode and power supply rejections, voltage LT1001 with Improved Price/Performance gain are typically in excess of 128dB. n High Impedance Difference Amplifiers All parameters that are important for precision, low power n Logarithmic Amplifiers (Wide Dynamic Range) op amps have been optimized. Consequently, using the n Thermocouple Amplifiers LT1097 error budget calculations in most applications is n Precision Instrumentation unnecessary. n Active Filters (with Small Capacitors) , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION Saturated Standard Cell Amplifier Input Offset Voltage Distribution 9V 50 6,500 UNITS IN SO PACKAGE 2N3609 6,680 UNITS IN 7 PLASTIC 3 40 + DIP V = 15V S 6 13,180 UNITS T = 25C A OUT = 1.1V TO 8.0V LT1097 TESTED AS 1.8k R2 135k 2 30 + 4 1.018235V 20 SATURATED STANDARD CELL 101 10 EPPLEY LABS R2 R1 NEWPORT, R. I. 20k THE TYPICAL 40pA BIAS CURRENT OF THE LT1097 0 WILL DEGRADE THE STANDARD CELL BY ONLY 50 40 30 20 10 0 10 20 30 40 50 1ppm/YEAR. NOISE IS A FRACTION OF A ppm. INPUT OFFSET VOLTAGE (m V) UNPROTECTED GATE MOSFET ISOLATES STANDARD CELL ON POWER DOWN. LT1097 G01 LT1097TA01 1 PERCENT OF UNITS U ULT1097 ABSOLUTE MAXIMUM RATINGS Supply Voltage ...................................................... 20V Operating Temperature Range .................40 C to 85 C Differential Input Current (Note 1) ...................... 10mA Storage Temperature Range ..................65 C to 150 C Input Voltage ......................................................... 20V Lead Temperature (Soldering, 10 sec).................. 300 C Output Short Circuit Duration .......................... Indefinite PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW ORDER ORDER V TRIM 1 8 V TRIM PART NUMBER V TRIM 1 8 V TRIM PART NUMBER OS OS OS OS + + IN 2 V 7 IN 2 7 V LT1097CN8 LT1097S8 +IN 3 6 OUT +IN 3 6 OUT V 4 5 OVER COMP V 4 5 OVER COMP N8 PACKAGE S8 PACKAGE 8-LEAD PLASTIC DIP 8-LEAD PLASTIC SO V = 15V, V = 0V, T = 25 C, unless otherwise noted. ELECTRICAL CHARACTERISTICS S CM A LT1097CN8 LT1097S8 SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS V Input Offset Voltage 10 50 10 60 m V OS D V Long Term Input Offset 0.3 0.3 m V/Mo OS D TIME Voltage Stability I Input Offset Current 40 250 60 350 pA OS I Input Bias Current 40 250 50 350 pA B e Input Noise Voltage 0.1Hz to 10Hz 0.5 0.5 m Vp-p n Input Noise Voltage Density f = 10Hz 16 16 nV/ Hz O f = 1000Hz 14 14 nV/ Hz O i Input Noise Current 0.1Hz to 10Hz 2.2 2.4 pAp-p n Input Noise Current Density f = 10Hz 0.03 0.035 pA/ Hz O f = 1000Hz 0.008 0.008 pA/ Hz O Input Resistance (Note 2) Differential Mode 30 80 25 70 MW 12 11 Common Mode 10 810 W Input Voltage Range 13.5 14.3 13.5 14.3 V CMRR Common Mode Rejection Ratio V = 13.5V 115 130 115 130 dB CM PSRR Power Supply Rejection Ratio V = 1.2V to 20V 114 130 114 130 dB S A Large Signal Voltage Gain V = 12V, R = 10k 700 2500 700 2500 V/mV VOL O L V = 10V, R = 2k 250 1000 250 1000 V/mV O L V Output Voltage Swing R = 10k 13 13.8 13 13.8 V OUT L R = 2k 11.5 13 11.5 13 V L SR Slew Rate 0.1 0.2 0.1 0.2 V/m s GBW Gain Bandwidth Product 700 700 kHz I Supply Current 350 560 350 560 m A S + Offset Adjustment Range R = 10k, Wiper to V 600 600 m V POT Minimum Supply Voltage (Note 3) 1.2 1.2 V 2 U W U W U WW