MAX5421CEUB+T

Overview

The MAX5421CEUB+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 gains (1, 2, 4, and 8) via a 2-wire parallel interface. It features a resistor ratio accuracy of 0.5% (MAX542_C grade) over the -40°C to +85°C temperature range. The MAX5421 includes an on-chip matching resistor for op amp bias-current compensation and is housed in a 10-pin µMAX package.

Feature Summary

• Four precision divider ratios providing noninverting gains of 1, 2, 4, and 8
• 0.5% divider ratio accuracy guaranteed over -40°C to +85°C
• On-chip matching resistor for op amp bias-current compensation
• Low 3µA supply current with CMOS/TTL compatible 2-wire parallel interface

Applications

• General-purpose programmable noninverting amplifiers
• Programmable instrumentation amplifiers

Procurement Notes

Verify the component designation against official Analog Devices documentation to confirm the specific accuracy grade and package type. Ensure that the ordering suffix corresponds to the required tape-and-reel packaging format if applicable for automated assembly processes.

Selection Notes

Select this component when precise voltage division is required for PGA circuits with low power consumption constraints. The MAX5421 variant is preferred over the MAX5420 when op amp bias-current compensation is necessary to minimize offset voltage errors in high-impedance applications.

Part Context

This part belongs to the MAX5420/MAX5421 family of digitally programmable precision voltage dividers. The 'C' suffix indicates a 0.5% ratio accuracy grade, while the 'B' and 'A' suffixes denote higher precision levels of 0.09% and 0.025%, respectively. All variants share identical pinouts and functional characteristics.

Replacement Considerations

The MAX5420CEUB+T serves as a direct substitute if op amp bias-current compensation is not required. Higher precision alternatives include the MAX5421BEUB+T (0.09% accuracy) and MAX5421AEUB+T (0.025% accuracy).