32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23

The MAX5471/MAX5472/MAX5474/MAX5475 linear-taper digital potentiometers function as mechanical potentiometers, but replace the mechanics with a simple 3-wire up/down digital interface. These digital potentiometers feature nonvolatile memory (EEPROM) to return the wiper to its previously stored position upon power-up.

The MAX5471/MAX5472 are 2-terminal, variable resistors in 6-pin SOT23 packages. The MAX5474/MAX5475 are 3-terminal potentiometers in 8-pin SOT23 packages.

The MAX5471/MAX5474 have an end-to-end resistance of 50kΩ, and the MAX5472/MAX5475 have an end-to-end resistance of 100kΩ. All of these devices have 32 wiper positions, a low ratiometric temperature coefficient (5ppm/°C), and all operate from a single +2.7V to +5.25V supply. Each device is guaranteed over the extended -40°C to +85°C temperature range.

Applications

* Audio Volume Control * Liquid-Crystal Display (LCD) Screen Adjustment * Mechanical Potentiometer Replacements * Programmable Filters

* Wiper Position Stored in Nonvolatile Memory and Recalled Upon Power-Up

* Tiny SOT23 Package

* 35ppm/°C End-to-End Resistance Temperature Coefficient

* 5ppm/°C Ratiometric Temperature Coefficient

* 32 Tap Positions

* Voltage-Divider or Variable-Resistor Potentiometer Configuration

* 50kΩ and 100kΩ End-to-End Resistance Values

* 1µA (max) Static Supply Current

* 2.7V to 5.25V Single-Supply Operation

* 200,000 Wiper Store Cycles

* 50-Year Wiper Data Retention