MAX5419LETA+T

Overview

The MAX5419LETA+T is a single-channel, nonvolatile digital potentiometer featuring a 200kΩ end-to-end resistance and 256 tap positions. It utilizes a fast-mode I²C-compatible serial interface for wiper control and retains position data via internal EEPROM upon power-up. The device operates on a single supply voltage ranging from +2.7V to +5.25V with a typical standby current of 500nA. Key electrical characteristics include a 35ppm/°C end-to-end temperature coefficient and ±0.5 LSB DNL/INL in voltage-divider mode. It is housed in an 8-pin TDFN package with an exposed pad and is specified over the -40°C to +85°C extended temperature range.

Feature Summary

• Nonvolatile memory stores wiper position for automatic recall at power-up
• Fast-mode I²C-compatible serial interface supporting up to 400kbps
• Single-supply operation from +2.7V to +5.25V with 500nA typical standby current
• 200kΩ nominal resistance with 256 linear-tap positions

Applications

• Low-drift programmable-gain amplifier circuits
• Liquid-crystal display (LCD) contrast control
• Mechanical potentiometer replacement in space-constrained designs

Procurement Notes

Verify the specific factory-preset I²C address associated with the 'LETA' suffix against the Ordering Information table before integration. Confirm that the system bus pullup resistors are appropriate for the 400kbps clock frequency and total bus capacitance limits. Ensure the A0 pin is hardwired to GND or VDD to match the expected slave address configuration.

Selection Notes

Select this component when a 200kΩ variable resistor is required within a 2.7V to 5.25V supply environment. The 256-tap resolution provides approximately 0.39% step size per tap. Consider the 35ppm/°C end-to-end temperature coefficient for gain stability requirements. Verify that the maximum continuous current into the H, L, and W terminals does not exceed ±0.3mA for this specific resistance value.

Part Context

This part belongs to the MAX5417/MAX5418/MAX5419 family of 256-tap nonvolatile digital potentiometers. The MAX5419 variant is distinguished by its 200kΩ nominal end-to-end resistance, whereas the MAX5417 offers 50kΩ and the MAX5418 offers 100kΩ. All variants share identical pinouts, interfaces, and nonvolatile memory architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.