Datasheet LT1097 (Analog Devices)

LT1097 Low Cost, Low Power Precision Op Amp
U FEATURES DESCRIPTION
■ Offset Voltage 50µV Max LT®1097 achieves a new standard in combining low price ■ Offset Voltage Drift 1µV/°C Max and outstanding precision performance. ■ Bias Current 250pA Max On all operational amplifier data sheets, the specifications ■ Offset Current 250pA Max listed on the front page are for highly selected, expensive ■ Bias and Offset Current Drift 4pA/°C Max grades, while the specs for the low cost grades are buried ■ Supply Current 560µA Max deep in the data sheet. ■ 0.1Hz to 10Hz Noise 0.5µVp-p, 2.2pAp-p ■ CMRR 115dB Min The LT1097 does not have any selected grades, the ■ Voltage Gain 117dB Min outstanding specifications shown in the Features section ■ PSRR 114dB Min are for its only grade. ■ Guaranteed Operation on Two NiCad Batteries The design effort of the LT1097 concentrated on optimiz-
U
ing the performance of all precision specs—at only 350µA
APPLICATIONS
of supply current. Typical values are 10µV offset voltage, 40pA bias and offset currents, 0.2µV/°C and 0.4pA/°C ■ 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. ■ High Impedance Difference Amplifiers All parameters that are important for precision, low power ■ Logarithmic Amplifiers (Wide Dynamic Range) op amps have been optimized. Consequently, using the ■ Thermocouple Amplifiers LT1097 error budget calculations in most applications is ■ Precision Instrumentation unnecessary. ■ Active Filters (with Small Capacitors) , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATION Saturated Standard Cell Amplifier Input Offset Voltage Distribution
9V 50 6,500 UNITS IN SO PACKAGE 2N3609 6,680 UNITS IN 3 7 + PLASTIC 40 DIP VS = ±15V 6 13,180 UNITS T LT1097 OUT = 1.1V TO 8.0V A = 25°C 2 AS 1.8k ≤ R2 ≤ 135k TESTED 30 + – 4 1.018235V SATURATED 20 STANDARD PERCENT OF UNITS CELL #101 EPPLEY LABS 10 R1 R2 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. UNPROTECTED GATE MOSFET ISOLATES INPUT OFFSET VOLTAGE (µV) STANDARD CELL ON POWER DOWN. LT1097 • G01 LT1097•TA01 1