Datasheet LT1112, LT1114 (Analog Devices)

LT1112/LT1114 Dual/Quad Low Power Precision, Picoamp Input Op Amps
U FEATURES DESCRIPTIO
■ Offset Voltage – Prime Grade: 60µV Max The LT®1112 dual and LT1114 quad op amps achieve a ■ Offset Voltage – Low Cost Grade new standard in combining low cost and outstanding (Including Surface Mount Dual/Quad): 75µV Max precision specifications. ■ Offset Voltage Drift: 0.5µV/°C Max The performance of the selected prime grades matches or ■ Input Bias Current: 250pA Max exceeds competitive devices. In the design of the LT1112/ ■ 0.1Hz to 10Hz Noise: 0.3µVP-P, 2.2pAP-P LT1114 however, particular emphasis has been placed on ■ Supply Current per Amplifier: 400µA Max optimizing performance in the low cost plastic and SO ■ CMRR: 120dB Min packages. For example, the 75µV maximum offset voltage ■ Voltage Gain: 1 Million Min in these low cost packages is the lowest on any dual or ■ Guaranteed Specs with ±1.0V Supplies quad non-chopper op amp. ■ Guaranteed Matching Specifications ■ SO-8 Package – Standard Pinout The LT1112/LT1114 also provide a full set of matching ■ specifications, facilitating their use in such matching LT1114 in Narrow Surface Mount Package dependent applications as two and three op amp instru-
U APPLICATIO S
mentation amplifiers. Another set of specifications is furnished at ■ ±1V supplies. Picoampere/Microvolt Instrumentation This, combined with the low 320 ■ µA supply current per Two and Three Op Amp Instrumentation Amplifers amplifier, allows the LT1112/LT1114 to be powered by ■ Thermocouple and Bridge Amplifiers two nearly discharged AA cells. ■ Low Frequency Active Filters ■ Photo Current Amplifiers , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Protected by U.S. Patents 4,575,685; 4,775,884 and 4,837,496 ■ Battery-Powered Systems
U TYPICAL APPLICATIO Distribution of Input Offset Voltage Dual Output, Buffered Reference (On Single 3V Supply) (In All Packages)
30 3V TOTAL SUPPLY CURRENT = 700µA VS = ±15V 2V REFERENCE: SOURCES 1.7mA, SINKS 5mA T R A = 25°C 15k X OPTIONAL RX = 300Ω INCREASES SOURCE 25 CURRENT TO 5mA 0.765V REFERENCE: SOURCES 5mA, 20 SINKS 0.5mA 2 – 8 TEMPERATURE COEFFICIENT LIMITED 1 BY REFERENCE = 20ppm/°C 15 1/2 LT1112 2.000V 3 + MINIMUM SUPPLY = 2.7V 75k PERCENT OF UNITS 10 LT1004-1.2 0.1% 5 6 – 0 7 1/2 LT1112 0.765V –70 –50 –30 –10 10 30 50 70 5 + INPUT OFFSET VOLTAGE (µV) 4 LT1112/14 • TA02 46.4k 0.1% LT1112/14 • TA01 111214fb 1