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MAX5420 - Digitally Programmable Precision Voltage Divider

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.

Features

  • o Four Precision Divider Ratios For Noninverting Gains of 1, 2, 4, and 8 in PGAs o 0.025%, 0.09%, or 0.5% Ratio Accuracy Guaranteed Over -40°C to +85°C o On-Chip Matching Resistor for Op Amp BiasCurrent Compensation (MAX5421) o 5V Single or ±5V Dual Supply Operation o Low 3µA Supply Current o CMOS/TTL Logic Compatible 2-Wire Parallel Interface o Small 8-Pin and 10-Pin µMAX Packages MAX5420/MAX5421.

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Full PDF Text Transcription

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www.DataSheet.co.kr 19-2229; Rev 1; 7/03 Digitally Programmable Precision Voltage Divider for PGAs 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.
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