MCP41HV31-503E/MQ

Digital Potentiometers Overview

The MCP41HV31-503E/MQ is a single-channel digital potentiometer from the MCP41HVX1 family, manufactured by Microchip Technology. It features a 50 kΩ resistor network with 7-bit resolution, providing 128 taps. The device supports high-voltage analog operation with a terminal voltage range of +36V (referenced to V-) or ±18V relative to digital ground. It utilizes an SPI serial interface for control and contains volatile memory for wiper settings. The component operates within an extended temperature range of -40°C to +125°C and is housed in a VQFN-20 package.

Digital Potentiometers Feature Summary

• High-Voltage Analog Support: Handles up to +36V terminal voltage or ±18V dual-rail operation.
• SPI Interface: Compatible with standard SPI modes (0,0 and 1,1) at speeds up to 10 MHz.
• Volatile Memory: Retains wiper position only while powered; resets to mid-scale upon power-on.
• Shutdown Capability: Includes a dedicated SHDN pin and TCON register for disconnecting the resistor network.

Digital Potentiometers Applications

• High-voltage sensor signal conditioning
• Industrial process control loop tuning
• Programmable gain amplifier offset adjustment

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'MQ' corresponds to the VQFN-20 package type as defined in the official datasheet. Confirm that the application design accommodates the volatile nature of the wiper memory, requiring state restoration after power cycles. Ensure supply voltages adhere to the specified limits for both analog and digital rails.

Digital Potentiometers Selection Notes

Select this model for applications requiring a single potentiometer channel with high voltage tolerance. The 50 kΩ resistance value suits moderate current applications, supporting up to 6.5 mA continuous current. Consider the 7-bit resolution if higher precision is not required, and ensure the PCB layout supports the VQFN-20 package thermal dissipation requirements.

Digital Potentiometers Part Context

This part belongs to the MCP41HVX1 family, which includes variants with different resolutions (7-bit and 8-bit) and interfaces (SPI and I2C). The '31' designation indicates the 7-bit SPI version. Other family members include the MCP41HV51 (8-bit SPI) and MCP45HV31 (7-bit I2C), offering flexibility for systems needing different resolution or communication protocols.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include the MCP41HV51-503E/MQ for 8-bit resolution or the MCP45HV31-503E/MQ for I2C interface compatibility. Cross-family replacement with standard low-voltage digital potentiometers requires careful evaluation of voltage ratings and current handling capabilities.