MCP4161-502E/MF

Digital Potentiometers Overview

The MCP4161-502E/MF is a single-channel, non-volatile digital potentiometer from Microchip Technology. It features an 8-bit resolution with 257 taps and a nominal resistance (R_AB) of 5 kΩ. The device operates on a supply voltage range of 2.7V to 5.5V for specified characteristics, supporting operation down to 1.8V for the serial interface only. It utilizes an SPI serial interface compatible with modes 0,0 and 1,1 at frequencies up to 10 MHz. Key features include WiperLock™ technology for automatic recall of saved wiper settings upon power-up, high-voltage tolerant digital inputs up to 12.5V, and a typical wiper resistance of 75 Ω. The component is housed in an 8-lead MSOP package.

Digital Potentiometers Feature Summary

• Non-volatile memory with WiperLock™ technology for automatic wiper setting recall
• SPI serial interface supporting 10 MHz clock speeds (modes 0,0 & 1,1)
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V
• Single resistor network with 8-bit resolution (257 steps) and 5 kΩ nominal resistance

Digital Potentiometers Applications

• Remote calibration of sensor zero points and ranges
• Adjustable gain control in instrumentation amplifiers
• Voltage reference trimming in data acquisition systems
• Programmable biasing in analog signal conditioning circuits

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix 'MF' corresponds to the MSOP-8 package variant when sourcing. Confirm that the application environment remains within the specified operating temperature range of -40°C to +125°C. Ensure the system power supply voltage meets the minimum requirement of 2.7V for full electrical specification compliance, noting that 1.8V support is limited to serial interface operations only.

Digital Potentiometers Selection Notes

Select this model for applications requiring persistent resistance settings without external battery backup. The 5 kΩ resistance value is suitable for moderate current loads, while the 8-bit resolution provides precise step adjustments. Consider the high-voltage tolerant inputs if interfacing directly with higher voltage logic levels without level shifting. The MSOP package is appropriate for space-constrained surface-mount designs.

Digital Potentiometers Part Context

This component belongs to the MCP414X/416X/424X/426X family of SPI digital potentiometers. The '41' designation indicates a single-potentiometer configuration, while '61' specifies 8-bit resolution with non-volatile EEPROM memory. The '-502' suffix denotes the 5 kΩ resistance value. This series integrates WiperLock™ technology to secure calibration data in Data EEPROM, distinguishing it from volatile RAM-based counterparts like the MCP4131.

Digital Potentiometers Replacement Considerations

For direct pin-compatible replacements with identical functionality, consider the MCP4161-502E/SN (SOIC-8) or MCP4161-502E/P (PDIP-8). If non-volatile memory is not required, the MCP4151-502E series offers similar electrical performance with volatile RAM storage. For dual-channel requirements, the MCP4261 series provides two independent potentiometers in larger packages.