MAX5451EUD+T

Overview

The MAX5451EUD+T is a dual digital potentiometer IC featuring two independent 3-terminal variable resistors. Each channel provides 256 digitally controlled wiper positions with an end-to-end resistance of 10kΩ and ±25% tolerance. The device operates on a single supply voltage ranging from +2.7V to +5.5V, drawing an ultra-low supply current of 0.1µA at 2.7V. It utilizes an up/down interface for glitchless switching between taps and includes a power-on reset function that initializes the wipers to midscale (position 127). The component is housed in a 14-pin TSSOP package and is rated for operation within the extended industrial temperature range of -40°C to +85°C.

Feature Summary

• Dual 3-terminal potentiometers with 256 tap positions each
• Ultra-low supply current of 0.1µA at VDD = 2.7V
• Glitchless switching via up/down control interface
• Power-on reset sets wipers to midscale position

Applications

• Low-drift programmable-gain amplifiers
• Mechanical potentiometer replacement
• Adjustable linear regulators
• Volume control circuits
• Impedance matching networks

Procurement Notes

Verify the 'E' suffix indicates the extended industrial temperature range (-40°C to +85°C) and the '+T' suffix denotes tape-and-reel packaging. Confirm the specific resistance value matches the design requirements, as this part number corresponds to the 10kΩ variant within the MAX545x family. Ensure compatibility with the 14-pin TSSOP footprint during PCB layout.

Selection Notes

Select the MAX5451EUD+T when a dual-channel digital potentiometer with 3-terminal configuration is required. This model is suitable for applications needing low-temperature drift, characterized by a 35ppm/°C end-to-end coefficient. Choose this over the MAX5450 or MAX5452 variants if independent high and low terminals are necessary rather than internally connected variable resistor configurations.

Part Context

This component belongs to the MAX5450–MAX5455 family of dual digital potentiometers manufactured by Analog Devices / Maxim Integrated. The MAX5451 specifically designates the 10kΩ resistance value with a 14-pin TSSOP package and 3-terminal architecture. Other family members include the MAX5453 (50kΩ) and MAX5455 (100kΩ), which share identical pinouts and electrical characteristics aside from resistance values.

Replacement Considerations

Direct functional replacements within the same package and specification include the MAX5453EUD+T (50kΩ) and MAX5455EUD+T (100kΩ). For lower resistance options, the MAX5450EUB+T offers a 10kΩ value but uses a 10-pin µMAX package and 2-terminal configuration.