MCP4018T-103E/LTVAO

Overview

The MCP4018T-103E/LTVAO is a single-channel digital potentiometer IC manufactured by Microchip Technology. It features an I2C serial interface and volatile memory, providing 128 adjustable resistance steps (7-bit resolution). The device offers a nominal end-to-end resistance of 10 kΩ with a typical wiper resistance of 100 Ω. It operates within a supply voltage range of 1.8 V to 5.5 V and supports standard and fast-mode I2C communication. The component is housed in a compact SC70-6 surface-mount package and is rated for extended industrial operating temperatures from -40°C to +125°C.

Feature Summary

• I2C Serial Interface: Supports Standard Mode (up to 100 kHz) and Fast Mode (up to 400 kHz) communication protocols.
• Volatile Memory: Retains the last wiper setting only while power is applied; resets to mid-scale upon power-up or brown-out events.
• Potentiometer Configuration: Provides 128 taps with linear taper, allowing zero-scale to full-scale wiper operation.
• Low Power Consumption: Draws approximately 2.5 µA in standby mode and up to 80 µA during active serial interface operations.

Applications

• Audio volume control and tone adjustment circuits
• Programmable gain amplifier biasing
• Voltage reference trimming
• Sensor calibration and offset adjustment

Procurement Notes

Verify the specific ordering suffix 'LTVAO' against official Microchip documentation to confirm tape-and-reel packaging specifications and any unique marking codes. Ensure compatibility with existing PCB footprints for the SC70-6 package. Confirm that the volatile memory behavior aligns with system requirements regarding power-loss state retention.

Selection Notes

Select this model when a single-channel, 10 kΩ digital potentiometer with I2C control is required. The 10 kΩ resistance value suits moderate current applications compared to higher resistance variants. The volatile memory type necessitates external non-volatile storage if wiper position persistence across power cycles is critical. The SC70-6 package is suitable for space-constrained designs requiring surface-mount assembly.

Part Context

This component belongs to the MCP4017/18/19 family of 7-bit digital potentiometers. The MCP4018 variant specifically designates a potentiometer configuration, distinguishing it from the rheostat configurations found in the MCP4017 and MCP4019 models. All members of this family share similar electrical characteristics and pinouts, differing primarily in terminal connectivity and internal configuration.

Replacement Considerations

Direct replacements include other MCP4018 series devices with different resistance values (e.g., MCP4018T-503E/LTVAO for 50 kΩ or MCP4018T-104E/LTVAO for 100 kΩ), provided the resistance tolerance and temperature coefficients meet circuit requirements. Cross-family alternatives like the MCP4542 offer non-volatile memory but require different control interfaces or packages.