MAX5489ETE-T

Overview

The MAX5489ETE-T is a dual-channel, nonvolatile digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated. It features two independent wipers with 256 tap positions and a resistance value of 100 kOhms. The device utilizes a 3-wire SPI serial interface for control and retains settings via internal EEPROM. Operating voltage ranges from 2.7 V to 5.25 V, with a typical temperature coefficient of 35 ppm/°C and a tolerance of ±25%. It is housed in a 16-pin TQFN package (3mm x 3mm) with an exposed pad, designed for surface-mount applications within a -40°C to +85°C operating temperature range.

Feature Summary

• Dual-channel architecture with 256 discrete tap positions per channel
• Nonvolatile memory (EEPROM) preserves wiper settings during power-off
• 3-wire SPI compatible serial control interface
• Compact 16-pin TQFN-EP (3x3 mm) surface-mount package

Applications

• Programmable gain amplifiers requiring precise resistance adjustment
• Voltage reference trimming in precision measurement systems
• Audio volume control circuits with persistent setting retention
• Calibration of sensor bias voltages in industrial instrumentation

Procurement Notes

Verify the specific suffix 'T' against official documentation to confirm tape-and-reel packaging status, as datasheets may list 'MAX5489ETE+' for tube packaging. Confirm RoHS compliance status through the manufacturer's current certification documents. Ensure the source provides valid traceability for the Analog Devices/Maxim Integrated brand.

Selection Notes

Select this component when dual-channel nonvolatile adjustment is required in space-constrained designs. The 100 kOhm resistance value suits high-impedance signal paths. Verify that the 3-wire SPI interface aligns with the host microcontroller's available pins. Consider the ±25% tolerance if tight resistance matching is not critical for the application.

Part Context

The MAX5489 belongs to the MAX548x family of small-size digital potentiometers, which also includes the MAX5487 (10 kOhm) and MAX5488 (50 kOhm). These devices share the same 16-pin TQFN footprint and functional architecture, differing primarily in resistance values and tap counts. This family is designed to replace mechanical potentiometers in applications requiring programmable resistance without physical adjustment.

Replacement Considerations

Direct replacements include MAX5487ETE+ and MAX5488ETE+ if lower resistance values are acceptable. For single-channel applications, the MAX5481 or MAX5482 series may be considered. Verify pinout compatibility and ensure the substitute supports the required nonvolatile memory feature.