MAX5424 Datasheet | Maxim Integrated

.Data Sheet.co.kr 19-3371; Rev 0; 7/04 256-Tap, Nonvolatile, SPI-Interface, Digital Potentiometers General Description The MAX5422/MAX5423/MAX5424 nonvolatile, lineartaper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 3-wire SPI™-patible 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-patible serial interface allows munication at data rates up to 5MHz, minimizing board space and reducing interconnection plexity in many applications. The MAX5422/MAX5423/MAX5424 provide three nominal resistance values: 50k Ω (MAX5422), 100k Ω (MAX5423), or 200kΩ (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 gainamplifier circuit configurations. The MAX5422/MAX5423/MAX5424 are available in a 3mm x 3mm 8-pin TDFN package, and are specified over the extended -40°C to +85°C temperature range. Features o Wiper Position Stored in Nonvolatile Memory (EEPROM) and Recalled Upon Power-Up or Interface mand o 3mm x 3mm x 0.8mm TDFN Package o 35ppm/°C End-to-End Resistance Temperature Coefficient o 5ppm/°C Ratiometric Temperature Coefficient o 50kΩ, 100kΩ, and 200kΩ Resistor Values o 5MHz SPI-patible Serial Interface o 500n A (typ) Static Supply Current o Single-Supply Operation: +2.7V to +5.25V o 256 Tap Positions o ±0.5 LSB DNL in Voltage-Divider Mode o ±0.5 LSB INL in Voltage-Divider Mode SPI is a trademark of Motorola, Inc. MAX5422/MAX5423/MAX5424 Applications Mechanical Potentiometer Replacement Low-Drift Programmable Gain Amplifiers Audio Volume Control Liquid-Crystal Display (LCD)...