General Description

The MAX5420 and MAX5421 are digitally programmable precision voltage dividers optimized for use in digitally programmable gain amplifier configurations. The MAX5420/MAX5421 operate from a single +5V supply or dual ±5V supply, and consume only 3µA supply current. These devices consist of a digitally selectable resistor array that provides four precision noninverting gains of 1, 2, 4, and 8 for PGAs. The MAX5420 and MAX5421 achieve a resistor ratio accuracy of 0.025 (MAX542_A), 0.09 (MAX542_B), and 0.5 (MAX542_C). The MAX5421 includes an on-chip matching resistor for op amp bias-current compensation.

The MAX5420 and MAX5421 are available in 8-pin and 10-pin µMAX packages. The devices are specified over the extended temperature range (-40°C to +85°C).

Features

♦ Four Precision Divider Ratios For Noninverting

   Gains of 1, 2, 4, and 8 in PGAs

♦ 0.025, 0.09, or 0.5 Ratio Accuracy

   Guaranteed Over -40°C to +85°C

♦ On-Chip Matching Resistor for Op Amp Bias

   Current Compensation (MAX5421)

♦ 5V Single or ±5V Dual Supply Operation

♦ Low 3µA Supply Current

♦ CMOS/TTL Logic Compatible 2-Wire Parallel Interface

♦ Small 8-Pin and 10-Pin µMAX Packages

Applications

   General-Purpose Programmable Noninverting Amplifiers

   Programmable Instrumentation Amplifiers