MAX5431CEUB+T

Overview

The MAX5431CEUB+T is a digitally programmable precision resistor array designed for programmable-gain amplifier (PGA) applications. It operates from single +15V or dual ±15V supplies with a typical supply current of 35µA. The device provides four noninverting gain configurations (1, 2, 4, and 8) with a ratio accuracy of 0.5%. It features a CMOS/TTL compatible 2-wire parallel interface and includes an on-chip matching resistor for op amp input bias-current compensation. The component is housed in a 10-pin µMAX package and is specified over the extended temperature range of -40°C to +85°C.

Feature Summary

• Four Noninverting PGA Gain Configurations: AV = 1, 2, 4, and 8
• Precision 0.5% Ratio Accuracy (C Grade)
• On-Chip Matching Resistor for Op Amp Bias-Current Compensation
• Single-Supply +12V to +15V, or Dual-Supply ±12V to ±15V Operation

Applications

• General-Purpose Programmable Noninverting Amplifier
• Programmable Instrumentation Amplifier

Procurement Notes

Verify the specific suffix 'CEUB' corresponds to the C-grade accuracy (0.5%) and the 10-pin µMAX package configuration. Confirm that the '+T' designation indicates tape-and-reel packaging if required by the assembly process. Ensure the ordering information matches the manufacturer's current datasheet revision to avoid discrepancies in pinout or electrical specifications.

Selection Notes

Select the MAX5431CEUB+T when a 0.5% divider ratio accuracy is sufficient for the application. Choose this part over the A or B grades if cost optimization is prioritized over higher precision. Ensure the design accommodates the 10-pin µMAX package dimensions and the requirement for a matching resistor network for bias current compensation in the operational amplifier circuit.

Part Context

This component belongs to the MAX5430/MAX5431 family of digitally programmable high-precision resistor arrays. The MAX5431 variant specifically integrates a matching resistor, distinguishing it from the MAX5430 which lacks this feature. The 'C' suffix denotes the 0.5% accuracy grade, while 'EUB' specifies the 10-pin µMAX package type.

Replacement Considerations

The MAX5430CEUB+T is a functional substitute if the on-chip matching resistor is not required and the system utilizes an ultra-low input bias current op amp. Other accuracy grades within the same package (MAX5431AEUB+T, MAX5431BEUB+T) offer higher precision but may differ in cost.