Low-Power Digital Potentiometers

The MAX5160/MAX5161 linear-taper digital potentiometers perform the same function as a mechanical potentiometer or a variable resistor. They consist of a fixed resistor and a wiper contact with 32 tap points that are digitally controlled by three lines for the 8-pin MAX5160 or by two lines for the 6-pin MAX5161.

These parts are ideal for applications requiring digitally controlled resistors. Three resistance values are available for each part type: 50kΩ,100kΩ, and 200kΩ. A nominal resistor temperature coefficient of 50ppm/°C end-to-end and only 5ppm/°C ratiometric makes the MAX5160 ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-tempco, adjustable-gain circuit configurations.

The MAX5160 is available in an 8-pin µMAX package, and the MAX5161 is available in a 6-pin SOT23 package. Both devices are guaranteed over the extended-industrial temperature range (-40°C to +85°C).

Applications

* LCD Screen Adjustment * Mechanical Potentiometer Replacements * Volume Control

* 32 Tap Positions

* 50kΩ, 100kΩ, and 200kΩ Resistance Values

* 400Ω Wiper Resistance

* ±25% Resistance Tolerance

* 3-Wire Serial Data Input

* ±1LSB DNL

* ±0.5LSB INL

* 100nA Supply Current

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

* Power-On Reset: Wiper Goes to Midscale (position 16)

* ±2kV ESD Protection

* Small-Footprint Packages

* 6-Pin SOT23 (MAX5161)

* 8-Pin µMAX (MAX5160)

* Glitchless Switching Between the Resistor Taps