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