MAX5457EEE+

Overview

The MAX5457EEE+ is a dual logarithmic taper digital potentiometer featuring a pushbutton interface for audio volume and balance control. It operates on a single +2.7V to +5.5V or dual ±2.7V supply with an active current of 100µA and standby current of 0.5µA. Each channel provides 32 tap positions with a nominal 10kΩ end-to-end resistance (7kΩ to 13kΩ range). The device includes SmartWiper acceleration, internal debounce circuitry, and click/pop suppression. It is housed in a 16-pin QSOP package and specified over the -40°C to +85°C temperature range.

Feature Summary

• SmartWiper Control: Accelerates wiper motion at 4Hz after 1s hold and 16Hz after 4s hold.
• Pushbutton Interface: Includes internal 50kΩ pullup resistors and debounce circuitry.
• Audio Optimization: Logarithmic taper with 2dB steps, 0.01% THD+N, and click/pop suppression.
• Mute Function: Forces wipers to maximum attenuation (-90dB typical) via MUTE input.

Applications

• Stereo Volume Control
• Fading and Balancing Stereo Signals
• Stereo Blending and Mixing

Procurement Notes

Verify the datasheet revision history and ordering information for the specific MAX5457EEE+ part number. Confirm that the QSOP-16 package outline matches the design footprint requirements. Ensure the logic supply voltage (VLOGIC) aligns with the system's digital interface levels within the 2.7V to 5.5V operating range.

Selection Notes

Select the MAX5457EEE+ when a MODE input is required to toggle between volume and balance control modes using only three buttons. Choose this component over the MAX5456 if independent four-button inputs are not available or desired. Verify that the 10kΩ resistance value and logarithmic taper suit the audio application's attenuation curve requirements.

Part Context

The MAX5457EEE+ belongs to the MAX5456/MAX5457 family of stereo audio taper potentiometers. It serves as the three-button variant of the MAX5456, which utilizes a four-button interface. Both devices share identical electrical characteristics, pinouts for the potentiometer terminals, and package options, differing primarily in the digital control interface configuration.

Replacement Considerations

The MAX5456EEE+ is a direct functional substitute with a different button interface. For SPI-controlled alternatives, refer to the MAX5408–MAX5411 series data sheet.

FAQ

How does the SmartWiper feature function?

Holding a control input low for more than 1 second advances the wiper at 4Hz for 4 seconds, and then at 16Hz per second thereafter, eliminating the need for microcomputer intervention.

What is the purpose of the MODE_IND pin?

MODE_IND is an open-drain output that indicates the current control mode. When connected to an LED, it illuminates during balance-control mode and remains off during volume-control mode.

How is click/pop noise suppressed?

The device minimizes audible noise by allowing wiper position changes only when the voltage at the L_ terminal equals the voltage at the corresponding H_ terminal, or after a 32ms timeout.