MCP41HV51T-503E/ST

Digital Potentiometers Overview

The MCP41HV51T-503E/ST is a single-channel digital potentiometer featuring an SPI serial interface and volatile memory. It supports high-voltage analog operation with a terminal voltage range of +36V (DGND = V-) or ±18V relative to DGND. The device provides 256 taps (8-bit resolution) with a nominal resistance of 50 kΩ. Key specifications include a typical wiper resistance of 75 Ω, a maximum wiper current of 6.5 mA for the 50 kΩ variant, and a -3 dB bandwidth of 48 kHz. It operates on a digital supply of 1.8V to 5.5V and an analog supply of 10V to 36V.

Digital Potentiometers Feature Summary

• High-Voltage Analog Support: Handles up to +36V terminal voltage or ±18V dual-rail configurations.
• 8-Bit Resolution: Provides 256 discrete taps for precise resistance adjustment.
• SPI Interface: Compatible with standard SPI modes (0,0 and 1,1) at speeds up to 10 MHz.
• Write Latch (WLAT): Allows control over volatile wiper register updates for synchronized operations.

Digital Potentiometers Applications

• High-voltage sensor biasing and signal conditioning
• Programmable gain amplifiers in industrial instrumentation
• Voltage reference trimming in power supplies
• Audio volume control in professional equipment requiring high common-mode rejection

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging when ordering. Confirm the '503' code corresponds to the 50 kΩ resistance value. Ensure the 'E' suffix meets RoHS compliance requirements. Check the '/ST' designation for the TSSOP-14 package type against PCB footprint constraints.

Digital Potentiometers Selection Notes

Select this component for applications requiring high common-mode voltages exceeding standard logic levels. The 50 kΩ resistance offers a balance between current handling (6.5 mA max) and noise immunity. Consider the 75 Ω typical wiper resistance for low-loss signal paths. Verify that the system's digital ground potential remains within the specified limits relative to the analog rails.

Digital Potentiometers Part Context

This part belongs to the MCP41HVX1 family, which includes variants with different resolutions (7-bit/8-bit) and interfaces (I2C). The MCP41HV51 specifically denotes the 8-bit SPI version. The 'T' suffix distinguishes it from tube-packaged versions like the MCP41HV51-503E/ST.

Digital Potentiometers Replacement Considerations

Direct substitutes within the same family include MCP41HV31T-503E/ST (7-bit resolution) or MCP41HV51-503E/ST (tube package). Cross-family replacements require verifying SPI compatibility and ensuring the replacement supports the required +36V analog terminal voltage range.