MCP4151-502E/SN

Digital Potentiometers Overview

The MCP4151-502E/SN is a single-channel digital potentiometer IC from Microchip Technology, housed in an 8-pin SOIC package. It features an 8-bit resistor network providing 256 taps (257 steps) with a nominal resistance of 5 kΩ and ±20% tolerance. The device operates on a supply voltage range of 1.8V to 5.5V and utilizes a standard SPI serial interface for control. It employs volatile RAM memory, resetting the wiper to mid-scale upon power-up or brown-out events. Key electrical characteristics include a typical wiper resistance of 75Ω, a bandwidth of 2 MHz at 5kΩ, and high-voltage tolerant digital inputs up to 12.5V.

Digital Potentiometers Feature Summary

• 8-bit resolution with 256 taps and 5 kΩ nominal resistance
• SPI serial interface supporting modes 0,0 and 1,1 with frequencies up to 10 MHz
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V
• Brown-out reset protection with typical threshold of 1.5V

Digital Potentiometers Applications

• Gain control in audio and instrumentation circuits
• Voltage reference adjustment
• Programmable filter frequency setting
• Load balancing in power distribution systems

Digital Potentiometers Procurement Notes

Verify the specific suffix 'SN' corresponds to the 8-lead Small Outline Integrated Circuit (SOIC) package with a width of 3.90mm. Confirm that the '-502' code indicates the 5 kΩ resistance value. Ensure the environment supports the extended temperature range of -40°C to +125°C as specified for this device variant.

Digital Potentiometers Selection Notes

Select this component when a single-channel, 8-bit digital potentiometer with 5 kΩ resistance is required. The volatile memory type necessitates re-initialization after power cycles if a specific resistance state must be maintained. Ensure the system SPI clock speed does not exceed 10 MHz for VDD ≥ 2.7V or 1 MHz for VDD between 1.8V and 2.7V.

Digital Potentiometers Part Context

This part belongs to the MCP41XX family of single-resistor network digital potentiometers. It shares the same pinout and interface protocol with other variants in the MCP413X, MCP414X, and MCP416X series, differing primarily in resolution (7-bit vs. 8-bit), memory type (RAM vs. EEPROM), and operating voltage ranges.

Digital Potentiometers Replacement Considerations

Direct functional substitutes within the same package and specification include the MCP4151-502E/P (PDIP) or MCP4151-502E/MS (MSOP). For non-volatile requirements, the MCP4161-502E/SN offers identical electrical performance with EEPROM storage.