MAX5477ETE

Overview

The MAX5477ETE+ is a dual-channel digital potentiometer IC from the MAX5477 series, manufactured by Analog Devices Inc. (Maxim Integrated). It features two independent wipers, each with 256 taps and nonvolatile memory to retain settings during power loss. The device utilizes a linear resistance taper and operates on a 10 kOhm nominal resistance with a 25% tolerance. It communicates via a serial 2-wire interface compatible with I2C protocols. Electrical specifications include a supply voltage range of 2.7 V to 5.25 V and a maximum operating current of 1 uA. The component is housed in a TQFN-16 package and supports an industrial temperature range from -40°C to +85°C.

Feature Summary

• Dual channel configuration with 256-tap resolution per potentiometer
• Nonvolatile brush memory retains wiper position after power cycle
• Serial 2-Wire interface supporting I2C communication protocols
• Low power consumption with 1 uA operating current

Applications

• Programmable gain amplifiers requiring precise resistance adjustment
• Voltage reference trimming for calibration applications
• Digital control of analog signal paths in instrumentation systems

Procurement Notes

Verify the specific suffix designation when ordering, as packaging formats vary between tube and reel configurations within the same electrical family. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected variant matches the required PCB footprint, specifically the TQFN-16 package dimensions for the ETE suffix.

Selection Notes

Select this component when dual-channel nonvolatile adjustment is required with low power constraints. The 10 kOhm resistance value suits moderate impedance circuits. Verify that the system logic levels are compatible with the 2-Wire serial interface. Consider the TQFN-16 thermal performance if high ambient temperatures are expected within the specified -40°C to +85°C range.

Part Context

This part belongs to the MAX5477 family of dual digital potentiometers. Variants such as MAX5477EUD+ offer the same electrical characteristics in a TSSOP-14 package. Other family members like the MAX5478 differ primarily in nominal resistance values, such as 50 kOhm options. The ETE suffix specifically denotes the TQFN-16 surface-mount package type.

Replacement Considerations

Direct pin-compatible alternatives within the same series include the MAX5477EUD+ for TSSOP-14 mounting requirements. For different resistance values, the MAX5478 series provides similar functionality with 50 kOhm pots. Verify package compatibility and interface signaling before substituting.