Update: 30 September, 2023
The MAX5477/MAX5478/MAX5479 are nonvolatile, dual, linear-taper, digital potentiometers that perform the function of a mechanical potentiometer, but replace the mechanics with a simple 2-wire digital interface. Each device performs the same function as a discrete potenti- tiometer 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. A write-protect feature prevents accidental overwrites of the EEPROM. The fast-mode I2C-compati- ble serial interface allows communication at data rates up to 400kbps, minimizing board space and reducing interconnection complexity in many applications. Three address inputs allow a total of eight unique address combinations. The MAX5477/MAX5478/MAX5479 provide three nomi- nal resistance values: 10kΩ (MAX5477), 50kΩ (MAX5478), or 100kΩ (MAX5479). The nominal resistor temperature coefficient is 70ppm/°C end-to-end and 10ppm/°C ratiometric. The low temperature coefficient makes the devices ideal for applications requiring a low- temperature-coefficient variable resistor, such as low- drift, programmable gain-amplifier circuit configurations. The MAX5477/MAX5478/MAX5479 are available in 16- pin 3mm x 3mm x 0.8mm thin QFN and 14-pin 4.4mm x 5mm TSSOP packages. These devices operate over the extended -40°C to +85°C temperature range. Applications include Mechanical Potentiometer Replacement Low-Drift Programmable-Gain Amplifiers Volume Contro
File format: PDF
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MD5 Checksum: 63238E2B64CAD529FA2B9C9D7C333231
Publication date: 12 April, 2012
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PDF Link: MAXIM MAX5477/MAX5478/MAX5479 handbook PDF