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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