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MAX5420：Digitally Programmable Precision Voltage Divider for PGAs

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).

Key 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

MAX5420, MAX5421: Functional Diagram Applications/Uses General-Purpose Programmable Noninverting Amplifiers Programmable Instrumentation Amplifiers

DataSheet

Parametrics

Quality and Environmental Data

• MAX5420.pdf

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