MCP4011-503E/MS

Overview

The MCP4011-503E/MS is a volatile, 6-bit digital potentiometer manufactured by Microchip Technology in an 8-pin MSOP package. It provides a resistance value of 50 kΩ with 64 taps (63 resistors) and linear taper. The device operates on a supply voltage range of 1.8V to 5.5V for logic and 2.7V to 5.5V for resistor characteristics. It features a simple Up/Down serial interface with high-voltage tolerant inputs up to 12.5V. Key electrical parameters include a typical wiper resistance of 75 Ω, a maximum static current of 1 µA, and an operating temperature range from -40°C to +125°C.

Feature Summary

• 6-bit resolution providing 64 discrete tap positions with linear taper.
• High-voltage tolerant digital inputs (CS and U/D) supporting levels up to 12.5V.
• Low-power operation with a maximum static current of 1 µA when the serial interface is inactive.
• Configurable as either a potentiometer or rheostat via terminal connection.

Applications

• Volume control and gain adjustment in audio circuits.
• Programmable voltage references and biasing networks.
• Digital trimming of analog signal paths.
• Adjustable threshold detection circuits.

Procurement Notes

Verify that the specific order suffix 'MS' corresponds to the MSOP-8 package variant required for the design. Confirm the '-E' designation meets the extended industrial temperature range specifications (-40°C to +125°C). Ensure the volatile memory type aligns with system power-loss handling requirements, as settings are not retained without power.

Selection Notes

Select this component when a low-cost, single-channel digital potentiometer with high-voltage interface tolerance is needed. The 50 kΩ resistance value suits moderate impedance applications. Consider the 64-step resolution sufficient for the required adjustment granularity. Note that the device lacks non-volatile memory; use alternative models if power-off retention is mandatory.

Part Context

This part belongs to the MCP4011/2/3/4 family of low-cost digital potentiometers. The MCP4011 specifically denotes the potentiometer configuration, whereas other family members may offer rheostat configurations or different pinouts. All variants share the same core 6-bit architecture and Up/Down control protocol.

Replacement Considerations

Direct replacements within the same package and function include the MCP4011-503E/SN (SOIC-8) or MCP4011-503E/MC (DFN-8). Cross-family substitutes like the MCP4531 series offer I2C interfaces and non-volatile memory but require interface redesign.

FAQ

What is the default wiper setting upon power-up?

The device defaults to a mid-scale setting (Code 1Fh) upon power-on recall.

Can the CS and U/D pins handle voltages higher than VDD?

Yes, the digital inputs are high-voltage tolerant and can withstand up to 12.5V regardless of the VDD supply level.

Is the wiper resistance constant across all settings?

No, the wiper resistance varies significantly with voltage and temperature, typically ranging from 70 Ω to 125 Ω depending on conditions.