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