MCP41HV51-103E/ST

Digital Potentiometers Overview

The MCP41HV51-103E/ST is an 8-bit single-channel digital potentiometer featuring SPI serial interface and volatile memory. It supports high-voltage analog operation with a terminal voltage range of +36V (DGND = V-) or ±18V (DGND = V- + 18V). The device provides 256 taps for the 10 kΩ resistance network, with a typical wiper resistance of 75 Ω. Digital supply voltage ranges from 1.8V to 5.5V, while analog supply operates between 10V and 36V. It includes features such as Write Latch control, terminal disconnect via SHDN pin, and extended temperature range from -40°C to +125°C.

Digital Potentiometers Feature Summary

• High-Voltage Analog Support: +36V terminal voltage range or ±18V dual-rail configuration.
• 8-Bit Resolution: 256 taps with linear taper and 10 kΩ nominal resistance.
• SPI Interface: Supports 10 MHz clock speeds in Modes 0,0 and 1,1.
• Write Latch Control: WLAT pin allows synchronized updates of volatile wiper register.

Digital Potentiometers Applications

• High-voltage signal attenuation and gain control
• Programmable biasing in industrial instrumentation
• Analog circuit tuning in automotive systems

Digital Potentiometers Procurement Notes

Verify the package type corresponds to TSSOP-14 for the /ST suffix. Confirm the resistance value '103' indicates 10 kΩ. Ensure the operating environment stays within the specified -40°C to +125°C temperature range. Check that the analog supply voltage does not exceed 36V relative to V-. Validate SPI timing parameters against the host controller capabilities.

Digital Potentiometers Selection Notes

Select this component when high-voltage analog signals up to 36V need digital control. The 8-bit resolution offers 256 steps suitable for precise adjustments. Use the volatile memory version if power-down state retention is not required. Ensure the digital logic level matches the VL supply voltage range of 1.8V to 5.5V.

Digital Potentiometers Part Context

This part belongs to the MCP41HVX1 family, which includes variants with different resolutions (7-bit/8-bit) and interfaces (SPI/I2C). The '51' designation specifically indicates the 8-bit SPI variant. Other family members include MCP41HV31 (7-bit SPI), MCP45HV51 (8-bit I2C), and MCP45HV31 (7-bit I2C). All share similar high-voltage analog support characteristics.

Digital Potentiometers Replacement Considerations

MCP41HV31-103E/ST (7-bit resolution)

Digital Potentiometers FAQ

What is the maximum analog terminal voltage?

The maximum analog terminal voltage is +36V when DGND equals V-, or ±18V when DGND is offset by 18V from V-.

How many taps does the 8-bit model provide?

The 8-bit model provides 256 taps (255 resistors).

Is the wiper setting retained after power loss?

No, the MCP41HV51 uses volatile memory. The wiper resets to 7Fh upon power-on reset.