MAX5430BEKA+T

Overview

The MAX5430BEKA+T is a digitally programmable precision resistor array designed for programmable-gain amplifier (PGA) applications. It provides four noninverting gain configurations of 1, 2, 4, and 8 with a divider ratio accuracy of 0.09%. The device operates from a single +15V supply or dual ±15V supplies, consuming only 35µA of supply current. It features a CMOS/TTL logic compatible 2-wire parallel interface for gain selection. The end-to-end resistance between the H and L terminals is 57kΩ, while the impedance seen at the W wiper terminal is typically 14kΩ for gains of 2, 4, and 8. The component is housed in an 8-pin SOT-23 package and is specified over an extended temperature range of -40°C to +85°C.

Feature Summary

• Four Noninverting PGA Gain Configurations: AV = 1, 2, 4, and 8
• Precision 0.09% Divider Ratio Accuracy
• Low 35µA Supply Current
• CMOS/TTL Logic Compatible 2-Wire Parallel Interface

Applications

• General-Purpose Programmable Noninverting Amplifier
• Programmable Instrumentation Amplifier

Procurement Notes

Verify the ordering suffix '+T' indicates tape-and-reel packaging when sourcing this component. Confirm that the 'E' designation corresponds to the extended temperature range (-40°C to +85°C). Ensure the 'B' suffix matches the required 0.09% gain accuracy specification for the target application.

Selection Notes

Select the MAX5430BEKA+T when a 0.09% ratio accuracy is sufficient for the PGA design. Choose this part over the 'A' variant if cost optimization is required without sacrificing significant precision. Use the MAX5431 version if on-chip matching resistors are needed for op amp bias-current compensation, as the MAX5430 lacks this feature.

Part Context

This component belongs to the MAX5430/MAX5431 family of digitally programmable high-precision resistor arrays. The MAX5430 variant specifically excludes the internal matching resistor found in the MAX5431, making it suitable for use with ultra-low input bias current operational amplifiers where external compensation is unnecessary.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.