MAX5455EUD+

Overview

The MAX5455EUD+ is a dual digital potentiometer IC from the MAX5450–MAX5455 family, manufactured by Analog Devices (Maxim Integrated). It features two independent 3-terminal potentiometers, each with 256 digitally controlled wiper taps. The device operates on a single supply voltage ranging from +2.7V to +5.5V and consumes an ultra-low supply current of 0.1µA. Each potentiometer has an end-to-end resistance of 100kΩ with a temperature coefficient of 35ppm/°C. Control is managed via an up/down interface using Chip Select (CS), Up/Down (U/D), and Increment (INC) inputs. A power-on reset circuit initializes the wipers to the midscale position (127) upon startup.

Feature Summary

• Dual 3-terminal potentiometers with 256 tap positions
• Up/Down digital interface for glitchless switching
• Ultra-low supply current of 0.1µA at VDD = 2.7V
• Power-on reset sets wipers to midscale (position 127)
• 100kΩ resistance value with 35ppm/°C temperature coefficient

Applications

• Mechanical potentiometer replacement
• Low-drift programmable-gain amplifiers (PGA)
• Volume control circuits
• LCD screen adjustment
• Adjustable voltage references

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as indicated in official documentation. Ensure the TSSOP-14 package variant matches design requirements. Check for any specific ordering suffixes that may affect performance or packaging if sourcing alternative versions within the MAX5455 series.

Selection Notes

Select the MAX5455EUD+ when dual independent 3-terminal variable resistors are required. Choose this part over 2-terminal variants (MAX5454) if separate high terminals are needed for each potentiometer. Verify that the 100kΩ resistance value fits the application's impedance constraints. Ensure the operating voltage range of 2.7V to 5.5V aligns with the system power supply.

Part Context

The MAX5455EUD+ belongs to the MAX5450–MAX5455 family of dual digital potentiometers. It shares the same core architecture and interface as other members but is distinguished by its 3-terminal configuration and 100kΩ resistance value. It is packaged in a 14-pin TSSOP format, distinguishing it from the 10-pin µMAX versions like the MAX5454EUB.

Replacement Considerations

The MAX5453EUD+ serves as a functional substitute with identical pinout and interface but offers a 50kΩ resistance value. The MAX5451EUD+ is another compatible alternative providing the same 3-terminal structure with a 10kΩ resistance value. All three share the same 14-pin TSSOP package and up/down control logic.