MCP4161T-104E/MF

Digital Potentiometers Overview

The MCP4161T-104E/MF is a single-channel, non-volatile digital potentiometer from Microchip Technology. It features an 8-bit resolution with 257 tap positions and a nominal resistance (R_AB) of 100 kΩ. The device operates within a supply voltage range of 2.7V to 5.5V and supports SPI serial interfaces at frequencies up to 10 MHz. Key specifications include a typical wiper resistance of 75 Ω, a temperature coefficient of 150 ppm/°C across the extended operating range (-40°C to +125°C), and WiperLock™ technology for secure storage of calibration settings in Data EEPROM.

Digital Potentiometers Feature Summary

• Non-volatile memory with WiperLock™ technology for automatic recall of saved wiper settings upon power-up.
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V on control pins.
• SPI interface supporting modes 0,0 and 1,1 with high-speed read/write capabilities.
• Resistor terminal disconnect feature via Shutdown pin or Terminal Control register.

Digital Potentiometers Applications

• Industrial process control systems requiring precise analog signal adjustment.
• Audio equipment for volume control and tone shaping.
• Calibration circuits in measurement instruments needing stable, non-volatile gain settings.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'MF' corresponds to the DFN-8-EP package when sourcing. Confirm that the 'T' prefix indicates tape-and-reel packaging if bulk quantities are required. Ensure compatibility with the 2.7V to 5.5V supply voltage range for the specific application environment.

Digital Potentiometers Selection Notes

Select this model for applications requiring a single rheostat or potentiometer configuration with 100 kΩ total resistance. The 8-bit resolution provides 256 steps for fine adjustment. Consider the 150 ppm/°C tempco for wide temperature variations. Verify that the SPI interface timing requirements align with the host microcontroller's capabilities.

Digital Potentiometers Part Context

This component belongs to the MCP41XX series of 7/8-bit SPI digital potentiometers with non-volatile memory. It shares functional similarities with the MCP414X series but offers higher 8-bit resolution compared to the 7-bit MCP413X variants. The device is part of a broader family including dual-potentiometer options like the MCP4261.

Digital Potentiometers Replacement Considerations

Direct replacements include other MCP4161 variants with different packages such as MCP4161-104E/SN (SOIC) or MCP4161-104E/P (PDIP). For lower resolution needs, the MCP4141-104E series may be considered, though it lacks some advanced features. Ensure any substitute matches the 100 kΩ resistance and non-volatile memory requirement.