DESCRIPTION
The LT ®2178 is a micropower dual op amp in a surface mount standard 8-pin configuration, the LT2179 is a micropower quad op amp offered in a surface mount 14-pin package. Both devices are optimized for single supply operation at 5V. Specifications are also provided at ±15V supply.
The extremely low supply current is combined with true precision specifications: offset voltage is 30µV and offset current is 50pA. Both offset parameters have low drift with temperature. The 1.5pAP-P current noise and picoampere offset current permit the use the megohm level source resistors without introducing serious errors. Voltage noise, at 0.9µVP-P, is remarkably low considering the low supply current.
The LT2178/LT2179 can be operated from a single supply (as low as one lithium-cell or two NiCd batteries). The input range goes below ground. The all-NPN output stage swings to within a few millivolts of ground while sinking current. No power consuming pull down resistors are needed.

FEATURES
■ SO Package with Standard Pinout
■ Supply Current per Amplifier: 17µA Max
■ Offset Voltage: 70µV Max
■ Offset Current: 250pA Max
■ Input Bias Current: 5nA Max
■ Voltage Noise: 0.9µVP-P, 0.1Hz to 10Hz
■ Current Noise: 1.5pAP-P, 0.1Hz to 10Hz
■ Offset Voltage Drift: 0.5µV/°C
■ Gain Bandwidth Product: 85kHz
■ Slew Rate: 0.04V/µs
■ Single Supply Operation
   Input Voltage Range Includes Ground
   Output Swings to Ground while Sinking Current
   No Pull-Down Resistors Needed
■ Output Sources and Sinks 5mA Load Current

APPLICATIONS
■ Battery- or Solar-Powered Systems
   Portable Instrumentation
   Remote Sensor Amplifier
   Satellite Circuitry
■ Micropower Sample-and-Hold
■ Thermocouple Amplifier
■ Micropower Filters