MCP45HV31-503E/ST

Digital Potentiometers Overview

The MCP45HV31-503E/ST is a single-channel, high-voltage digital potentiometer from Microchip Technology. It features a 7-bit resolution with 128 taps and a nominal resistance of 50 kΩ. The device supports an I²C serial interface and utilizes volatile memory for wiper settings. It operates with separate analog (V+/V-) and digital (VL/DGND) power rails, allowing terminal voltages up to +36V relative to V-. Key electrical parameters include a typical wiper resistance of 75 Ω, a maximum wiper current of 6.5 mA, and an operating temperature range of -40°C to +125°C.

Digital Potentiometers Feature Summary

• High-Voltage Analog Support: Terminal voltage range up to +36V (DGND = V-) or ±18V (DGND = V- + 18V).
• I²C Serial Interface: Supports standard modes including 100 kHz, 400 kHz, 1.7 MHz, and 3.4 MHz.
• 7-Bit Resolution: Provides 128 tap positions with linear taper characteristics.
• Dual Power Rails: Separate analog supply (10V to 36V) and digital supply (1.8V to 5.5V).

Digital Potentiometers Applications

• Industrial control systems requiring high-voltage signal adjustment.
• Power management circuits involving variable gain or reference adjustments.
• Test and measurement equipment needing precise resistance tuning.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'E/ST' corresponds to the TSSOP-14 package and RoHS compliance as indicated in the datasheet. Confirm that the system design accommodates the separate analog and digital ground references required for the HV operation. Ensure the I²C bus speed does not exceed the specified limits for the chosen logic voltage level.

Digital Potentiometers Selection Notes

Select this model for applications requiring a single channel with 50 kΩ resistance and high-voltage tolerance. The 7-bit resolution offers 128 steps, suitable for moderate precision requirements. Consider the MCP45HV51 series if 8-bit (256 tap) resolution is necessary. Verify that the wiper current limit of 6.5 mA meets the load requirements at the selected resistance value.

Digital Potentiometers Part Context

This component belongs to the MCP45HVX1 family, which includes variants with different resolutions (7-bit and 8-bit) and resistance values (5k, 10k, 50k, 100k). The '31' designation indicates the 7-bit version, while '503' specifies the 50 kΩ resistance value. The family shares common features such as the I²C interface and high-voltage analog support.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include MCP45HV31-103E/ST (10 kΩ), MCP45HV31-502E/ST (5 kΩ), and MCP45HV31-104E/ST (100 kΩ). For higher resolution, consider the MCP45HV51 series. Ensure pin compatibility and voltage ratings match the application requirements when substituting.