Dual, 256-Tap, Nonvolatile, SPI-Interface, Linear-Taper Digital Potentiometers

The MAX5487/MAX5488/MAX5489 dual, linear-taper, digital potentiometers function as mechanical potentiometers with a simple 3-wire SPI™-compatible digital interface that programs the wipers to any one of 256 tap positions. These digital potentiometers feature a nonvolatile memory (EEPROM) to return the wipers to their previously stored positions upon power-up.

The MAX5487 has an end-to-end resistance of 10kΩ, while the MAX5488 and MAX5489 have resistances of 50kΩ and 100kΩ, respectively. These devices have a low 35ppm/°C end-to-end temperature coefficient, and operate from a single +2.7V to +5.25V supply.

The MAX5487/MAX5488/MAX5489 are available in 16-pin 3mm x 3mm x 0.8mm thin QFN or 14-pin TSSOP packages. Each device is guaranteed over the extended -40°C to +85°C temperature range.

Applications

* Audio Volume Control * LCD Screen Adjustment * Low-Drift Programmable Filters * Low-Drift Programmable-Gain Amplifiers * Mechanical Potentiometer Replacement

* Wiper Position Stored in Nonvolatile Memory (EEPROM) and Recalled Upon Power-Up or Recalled by an Interface Command

* 3mm x 3mm x 0.8mm, 16-Pin Thin QFN or 14-Pin TSSOP Packages

* ±1 LSB INL, ±0.5 LSB DNL (Voltage-Divider Mode)

* 256 Tap Positions

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

* 5ppm/°C Ratiometric Temperature Coefficient

* 10kΩ, 50kΩ, and 100kΩ End-to-End Resistance Values

* SPI-Compatible Serial Interface

* Reliability

* 200,000 Wiper Store Cycles

* 50-Year Wiper Data Retention

* +2.7V to +5.25V Single-Supply Operation