MCP41HV51T-104E/MQ

Digital Potentiometers Overview

The MCP41HV51T-104E/MQ is a single-channel, high-voltage digital potentiometer featuring an SPI serial interface and volatile memory. It provides 256 taps (8-bit resolution) with a nominal resistance of 100 kΩ. The device supports dual power rails, allowing analog terminal voltages up to +36V relative to V-, while the digital supply operates between 1.8V and 5.5V. Key electrical characteristics include a typical wiper resistance of 75 Ω, a maximum wiper current of 6.5 mA for the 100 kΩ variant, and an extended operating temperature range from -40°C to +125°C. It is housed in a 5x5 mm VQFN-20 package.

Digital Potentiometers Feature Summary

• High-Voltage Analog Support: Handles terminal voltage ranges up to +36V or ±18V relative to digital ground.
• Dual Power Rails: Separate analog (V+/V-) and digital (VL/DGND) supplies allow flexible system implementation.
• SPI Interface: Compatible with standard SPI modes (0,0 and 1,1) with a clock frequency up to 10 MHz.
• Write Latch (WLAT): Pin-controlled update mechanism allows synchronization of wiper changes, such as at zero crossings.

Digital Potentiometers Applications

• High-voltage sensor signal conditioning
• Programmable gain amplifiers in industrial instrumentation
• Voltage reference trimming in test equipment
• Audio volume control in professional audio systems

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging when ordering. Confirm the 'MQ' suffix corresponds to the VQFN-20 package. Ensure the design accounts for the volatile nature of the wiper position, which resets upon power loss. Check that the analog supply voltage meets the minimum requirements for specified performance levels.

Digital Potentiometers Selection Notes

Select this component for applications requiring high common-mode voltage handling on the resistor network. The 100 kΩ value limits the maximum continuous wiper current to 6.5 mA; ensure load currents do not exceed this limit. For lower resistance values like 5 kΩ, higher current capabilities are available. Verify that the digital logic level matches the VL supply voltage range.

Digital Potentiometers Part Context

This part belongs to the MCP41HVX1 family, which includes variants with different resolutions (7-bit/8-bit), interfaces (SPI/I2C), and resistance values. The MCP41HV51 specifically denotes the 8-bit SPI version. Other family members include the MCP41HV31 (7-bit) and MCP45HV51 (I2C interface).

Digital Potentiometers Replacement Considerations

Direct replacements within the same package and pinout include other MCP41HV51 variants with different resistance codes (e.g., -502 for 5 kΩ). Cross-family replacement with MCP45HV51 requires interface adaptation from SPI to I2C.