MAX5430AEKA+T

Overview

The MAX5430AEKA+T is a digitally programmable high-precision resistor array designed for programmable-gain amplifier (PGA) applications. It operates from single +12V to +15V or dual ±12V to ±15V supplies, consuming only 35µA of supply current. The device provides four noninverting gain configurations (1, 2, 4, and 8) with a divider ratio accuracy of 0.025%. It features a CMOS/TTL logic compatible 2-wire parallel interface and is housed in an 8-pin SOT23 package, specified over the extended temperature range of -40°C to +85°C.

Feature Summary

• Four precision noninverting PGA gain configurations: AV = 1, 2, 4, and 8
• High precision 0.025% divider ratio accuracy
• Low 35µA supply current consumption
• CMOS/TTL logic compatible 2-wire parallel digital interface

Applications

• General-purpose programmable noninverting amplifier
• Programmable instrumentation amplifier

Procurement Notes

Verify that the suffix 'T' indicates tape-and-reel packaging as per standard manufacturer conventions, though specific reel quantities are not detailed in the provided datasheet. Confirm the component meets RoHS compliance requirements before procurement integration.

Selection Notes

Select the MAX5430AEKA+T when a 0.025% ratio accuracy is required for PGA circuits. Ensure the design utilizes a single +15V or dual ±15V supply. For op amp input bias-current compensation, consider the MAX5431 variant which includes an on-chip matching resistor, whereas this part requires external low-bias op amps.

Part Context

This component belongs to the MAX5430/MAX5431 family of digitally programmable precision voltage dividers. The 'A' designation specifies the 0.025% accuracy grade, while 'EKA' denotes the 8-pin SOT23 package. The 'MAX5430' model lacks the internal matching resistor found in the 'MAX5431' counterpart.

Replacement Considerations

The MAX5430BEKA+T offers 0.09% accuracy, and the MAX5430CEKA+T offers 0.5% accuracy in the same package. The MAX5431AEKA+T is not available; the MAX5431 series uses the µMAX package (e.g., MAX5431AEUB).

FAQ

Does the MAX5430AEKA+T include an on-chip matching resistor?

No, the MAX5430 does not include a matching resistor. This feature is exclusive to the MAX5431 variant.

What is the end-to-end resistance between pins H and L?

The resistance between the High (H) and Low (L) terminals is typically 57kΩ.

How is the gain setting programmed?

Gain is set via a 2-bit parallel digital interface using inputs D1 and D0, corresponding to gains of 1, 2, 4, or 8.