MAX5420AEUA+T

Overview

The MAX5420AEUA+T is a digitally programmable precision voltage divider optimized for programmable gain amplifier (PGA) configurations. It operates from a single +5V or dual ±5V supply with a typical supply current of 3µA. The device provides four noninverting gain ratios: 1, 2, 4, and 8. It features a resistor ratio accuracy of 0.025% guaranteed over the -40°C to +85°C temperature range. The end-to-end resistance between terminals H and L is 15kΩ. Control is managed via a CMOS/TTL compatible 2-wire parallel interface using D1 and D0 inputs.

Feature Summary

• Four precision divider ratios providing noninverting gains of 1, 2, 4, and 8
• 0.025% divider ratio accuracy guaranteed over -40°C to +85°C
• Low power consumption with 3µA supply current
• CMOS/TTL logic compatible 2-wire parallel digital interface

Applications

• General-purpose programmable noninverting amplifiers
• Programmable instrumentation amplifiers

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for lead-free packaging specifications. Ensure the ordering suffix matches the required package type and temperature grade. Validate that the specific lot meets quality standards for precision analog applications.

Selection Notes

Select this component when high-precision gain control is required for PGA circuits. The 0.025% accuracy rating suits applications demanding tight tolerance. Use the MAX5421 variant if on-chip matching resistors are needed for op amp bias-current compensation. Ensure the design supports the specified 15kΩ end-to-end resistance and 2-wire digital control interface.

Part Context

This part belongs to the MAX5420/MAX5421 family of digitally programmable precision voltage dividers. The 'A' suffix denotes the highest accuracy grade of 0.025%. The 'EUA' indicates an 8-pin µMAX package. Other variants include the MAX5420B (0.09% accuracy) and MAX5420C (0.5% accuracy).

Replacement Considerations

Compatible substitutes within the same family include MAX5420BEUA+T and MAX5420CEUA+T, which offer lower accuracy grades of 0.09% and 0.5% respectively. These share identical pinouts and functionality but differ in ratio accuracy specifications.