LT1884/LT1885 Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps UFEATURESDESCRIPTIO ■ Offset Voltage: 50 µ V Max (LT1884A) The LT®1884/LT1885 op amps bring high accuracy input ■ Input Bias Current: 400pA Max (LT1884A) performance to amplifiers with rail-to-rail output swing ■ Offset Voltage Drift: 0.8 µ V/ ° C Max while providing faster response than other precision am- ■ Rail-to-Rail Output Swing plifiers. Input offset voltage is trimmed to less than 50µV ■ Operates with Single or Split Supplies and the low drift maintains this accuracy over the operat- ■ Open-Loop Voltage Gain: 1 Million Min ing temperature range. Input bias currents are an ultralow ■ 1mA Maximum Supply Current Per Amplifier 400pA maximum. ■ Slew Rate: 1V/µs The amplifiers work on any total power supply voltage ■ Standard Pinouts between 2.7V and 36V (fully specified from 5V to ±15V). Output voltage swings to within 40mV of the negative U supply and 220mV of the positive supply make these APPLICATIO S amplifiers good choices for low voltage single supply ■ Thermocouple Amplifiers operation. ■ Bridge Transducer Conditioners ■ Slew rates of 1V/µs with a supply current of less than 1mA Instrumentation Amplifiers ■ per amplifier give superior response and settling time Battery-Powered Systems ■ performance in a low power precision amplifier. Photo Current Amplifiers ■ Precision Integrators The dual LT1884 is available with standard pinouts in ■ Precision Current Sources 8-pin SO and PDIP packages. The quad LT1885 is also in the standard pinout 14-pin SO package. , LTC and LT are registered trademarks of Linear Technology Corporation. UTYPICAL APPLICATIOInput Fault Protected Instrumentation Amplifier 1M 3 –IN + 10k 10k 10pF 1/4 LT1885 – R 10k G/2 – + 1/4 LT1885 OUT 1/4 LT1885 R GUARD G/2 + 10k – 2•10k GAIN = – RG 10k 9.76k 1/4 LT1885 1M 5 500Ω +IN + TRIM FIRST FOR DC CMRR 22pF TRIM FOR AC CMRR 1884 TA01 1
