General Description
The MAX478 and MAX479 are dual and quad micro power, precision op amps available in 8-pin and 14-pin DIP and small-outline packages, respectively. Both devices feature an extremely low, 17 µA max supply current per op amp, 70µV max offset voltage, 2.2µV/°C max offset voltage drift (0.5µV/°C typ), and 250pA max input offset current.
The MAX478 and MAX479 operate from a single supply. The input voltage range includes ground, and the output swings to within a few millivolts of ground, which eliminates pull-down resistors and saves power.
Both devices are optimized for single 3V and 5V supply operation, with guaranteed specifications at each supply voltage. Specifications for ±15V operation are also provided.

Features
♦ 17µA Max Supply Current (MAX478A/MAX479A)
♦ 70µV Max Offset Voltage (MAX478A)
♦ Single-Supply Operation:
   Input Voltage Range Includes Ground
   Output Swings to Ground While Sinking Current
   No Pull-Down Resistors Required
♦ Dual Op Amp in 8-Pin DIP/SO Package (MAX478)
   Quad Op Amp in 14-Pin DIP/SO Package (MAX479)
♦ 250pA Max Input Offset Current (MAX478A/MAX479A)
♦ 0.5µV/°C Offset-Voltage Drift
♦ 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
  Single Lithium Cell Powered Systems