MAX5421

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Digitally Programmable Precision Voltage Divider for PGAs

Data Sheet (Rev. 2) Product Selection Table
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Overview

  • 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

    • 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).

    Applications

    • General-Purpose Programmable Noninverting Amplifiers
    • Programmable Instrumentation Amplifiers
    MAX5421
    Digitally Programmable Precision Voltage Divider for PGAs
    MAX5420, MAX5421: Functional Diagram
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    Documentation

    Data Sheet 1

    Design Note 1

    Technical Articles 3

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