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General Description

The MAX5450–MAX5455 are a family of dual digital potentiometers that perform the same function as a mechanical potentiometer or variable resistor. The MAX5451/MAX5453/MAX5455 have two 3-terminal potentiometers and the MAX5450/MAX5452/MAX5454 have two 2-terminal variable resistors. The MAX5450–MAX5455 operate from a +2.7V to +5.5V single-supply voltage and use an ultra-low supply current of 0.1μA. These devices consist of two fixed resistors each

with 256 digitally-controlled wiper contacts. The convenient power-on reset (POR) sets the wiper to midscale position at power-up and the easy-to-use up/down interface allows glitchless switching between resistor taps. Six inputs control the 14-pin MAX5451/MAX5453/MAX5455 potentiometers. Four inputs control the 10-pin MAX5450/MAX5452/MAX5454 variable resistors.

Features

?Small-Footprint Packages

? 10-Pin μMAX (MAX5450/MAX5452/MAX5454)

? 14-Pin TSSOP (MAX5451/MAX5453/MAX5455)

?256-Tap Positions

?Independent Up/Down Potentiometer Controls(MAX5451/MAX5453/MAX5455)

?Ultra-Low 0.1μA Supply Current

?+2.7V to +5.5V Single-Supply Operation

?Low 35ppm/°C End-to-End Temperature Coefficient

?Power-On Reset Sets Wiper to Midscale(Position 127)

?Glitchless Switching Between the Resistor Taps

?10k?, 50k?, 100k?Resistance Values

Applications

Mechanical Potentiometer Replacement

Low-Drift Programmable-Gain Amplifier (PGA)

Volume Control

LCD Screen Adjustment

Adjustable Voltage References

Adjustable Linear Regulators

Programmable Filters, Delays, Time Constants

Impedance Matching