MAX5420BEUA+T

Overview

The MAX5420BEUA+T is a digitally programmable precision voltage divider in an 8-pin µMAX package. It provides four noninverting gain ratios (1, 2, 4, and 8) for programmable-gain amplifier applications. The device operates from a single +5V or dual ±5V supply with a typical supply current of 3µA. It features a 15kΩ end-to-end resistance and achieves a divider ratio accuracy of ±0.09%. The component utilizes a CMOS/TTL compatible 2-bit parallel interface for control.

Feature Summary

• Four precision noninverting gain ratios: 1, 2, 4, and 8
• ±0.09% divider ratio accuracy guaranteed over -40°C to +85°C
• Low power consumption with 3µA typical supply current
• CMOS/TTL logic compatible 2-wire parallel digital interface

Applications

• General-purpose programmable noninverting amplifiers
• Programmable instrumentation amplifiers

Procurement Notes

Verify the BEUA suffix indicates the B-grade accuracy variant (±0.09%) and the T suffix denotes tape-and-reel packaging. Confirm the component meets RoHS standards as indicated by the '+' designation. Ensure the specific lot matches the required temperature range specifications.

Selection Notes

Select this part when a ±0.09% resistor ratio accuracy is sufficient for PGA designs. Choose the MAX5420BEUA+T over the A-grade version if cost optimization is required without sacrificing significant precision. Use the MAX5421 variant only if on-chip bias-current compensation matching resistors are necessary.

Part Context

This component belongs to the MAX5420/MAX5421 family of digitally programmable precision voltage dividers. The MAX5420 variant lacks the internal matching resistor found in the MAX5421, making it suitable for use with ultra-low input bias current operational amplifiers.

Replacement Considerations

The MAX5420AEUA+T offers higher accuracy at ±0.025%, while the MAX5420CEUA+T provides lower accuracy at ±0.5%. For designs requiring bias-current compensation, the MAX5421BEUB+T is the functional equivalent with an additional matching resistor.