MCP4161T-104E/SN

Digital Potentiometers Overview

The MCP4161T-104E/SN 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 100 kΩ. The device operates on a supply voltage range of 2.7V to 5.5V for full analog specifications, while the serial interface supports operation down to 1.8V. It utilizes an SPI interface compatible with modes 0,0 and 1,1, supporting clock frequencies up to 10 MHz at V_DD ≥ 2.7V. Key electrical characteristics include a typical wiper resistance of 75 Ω, a temperature coefficient of 150 ppm/°C over the extended range (-40°C to +125°C), and WiperLock™ technology for automatic recall of saved settings.

Digital Potentiometers Feature Summary

• Non-volatile memory with WiperLock™ technology for automatic wiper setting recall upon power-up.
• SPI serial interface supporting high-speed read/write operations at frequencies up to 10 MHz.
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V.
• Hardware and software write protect features via WP pin and configuration bits.

Digital Potentiometers Applications

• Industrial process control systems requiring precise resistance adjustment.
• Audio equipment for volume or tone control applications.
• Calibration circuits in instrumentation where stable reference values are needed.
• Programmable gain amplifiers and variable attenuators.

Digital Potentiometers Procurement Notes

Verify that the ordering suffix 'SN' corresponds to the SOIC-8 package and 'T' indicates tape and reel packaging. Confirm the '-104' code matches the required 100 kΩ resistance value. Ensure the 'E' suffix denotes compliance with RoHS standards and halogen-free requirements as specified by the manufacturer.

Digital Potentiometers Selection Notes

Select this component when a single-channel, non-volatile digital potentiometer with 100 kΩ resistance is required. The 8-bit resolution provides 256 steps for fine adjustment. Consider the 100 kΩ value against load requirements; higher resistance may limit bandwidth and increase noise sensitivity compared to lower resistance options like 5 kΩ or 10 kΩ within the same family.

Digital Potentiometers Part Context

This part belongs to the MCP41XX series of single resistor network digital potentiometers. The '6' in the model number indicates 8-bit resolution with non-volatile memory, distinguishing it from the 7-bit volatile MCP413X or RAM-only MCP415X variants. The '1' denotes a single channel, while '2' would indicate a dual channel device.

Digital Potentiometers Replacement Considerations

Direct replacements within the same package and functionality include other MCP4161 variants with different resistance codes (e.g., MCP4161-502E/SN for 5 kΩ). For pin-compatible alternatives with similar features, consider the MCP4261 series if dual channels are acceptable, though pinouts differ slightly for dual devices.