256-tap, Nonvolatile, Spi-interface, Digital Potentiometers

The MAX5422 MAX5423 MAX5424 nonvolatile, linear- taper, Digital Potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 3-wire SPI-compatible digital Interface Each device performs the same function as a Discrete potentiometer or variable resistor and has 256 tap points. The devices feature an internal, nonvolatile EEPROM used to store the wiper position for initialization during power-up. The 3-wire SPI-compatible serial Interface allows Communication at data rates up to 5MHz, mini- mizing board space and reducing interconnection com- plexity in many applications. The MAX5422 MAX5423 MAX5424 provide three nomi- nal resistance values: 50k MAX5422 , 100k MAX5423 , or 200k MAX5424 . The nominal resistor temperature coefficient is 35ppm/C end-to-end and only 5ppm/C ratiometric. This makes the devices ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-drift, programmable gain- Amplifier circuit configurations. The MAX5422 MAX5423 MAX5424 are available in a 3mm x 3mm 8-pin TDFN package, and are specified over the extended -40C to +85C temperature range. By Maxim Integrated Products