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