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MAX5432：32-Tap, Nonvolatile, I²C, Linear, Digital Potentiometers

32-Tap, Nonvolatile, I²C, Linear-Taper, Digital Potentiometers Perform the Function of a Mechanical Potentiometer, but Replace the Mechanics with a Simple 2-Wire Serial Interface

The MAX5432–MAX5435 nonvolatile, linear-taper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 2-wire serial interface. Each device performs the same function as a discrete potentiometer or a variable resistor and has 32 tap points. The MAX5432–MAX5435 feature an internal, nonvolatile, electrically erasable programmable read-only memory (EEPROM) that returns the wiper to its previously stored position at power-up. The fast-mode I²C-compatible serial interface allows communication at data rates up to 400kbps, minimizing board space and reducing interconnection complexity. Each device is available with multiple factory-preset I²C addresses (see the Ordering Information/Selector Guide in the full data sheet). Use the MAX5432–MAX5435 in applications requiring digitally controlled resistors. Two resistance values are available (50kΩ and 100kΩ) in a voltage-divider or variable resistor configuration. The nominal resistor temperature coefficient is 35ppm/°C end-to-end, and only 5ppm/°C ratiometric, making the devices ideal for applications requiring a low-temperature-coefficient variable resistor such as low-drift, programmable-gain amplifier circuit configurations. The MAX5432/MAX5433 are available in a 3mm x 3mm 8-pin TDFN package and the MAX5434/MAX5435 are available in a 6-pin thin SOT23 package. The MAX5432–MAX5435 are specified over the extended (-40°C to +85°C) temperature range.

Key Features Tiny 3mm x 3mm 8-Pin TDFN and 6-Pin Thin SOT23 Packages Power-On Recall of Wiper Position from Nonvolatile Memory 35ppm/°C End-to-End Resistance Temperature Coefficient 5ppm/°C Ratiometric Temperature Coefficient 50kΩ/100kΩ Resistor Values Fast 400kbps I²C-Compatible Serial Interface 500nA (typ) Static Supply Current +2.7V to +5.25V Single-Supply Operation 32 Tap Positions ±0.15 LSB INL (typ), ±0.15 LSB DNL (typ)

MAX5432, MAX5433, MAX5434, MAX5435: Typical Operating Circuit Applications/Uses Liquid-Crystal Display (LCD) Screen Adjustment Low-Drift Programmable-Gain Amplifiers Mechanical Potentiometer Replacements Volume Control

DataSheet

Parametrics

Design kits & evaluation modules

• MAX5432EVKIT

Ordering Information