Sunnyvale, Calif. These 32-tap, nonvolatile, linear digital potentiometers (MAX5432-MAX5435) from Maxim Integrated Products offer integrated E2PROM (electrically erasable PROM), allowing the devices to function as mechanical pots, thus saving board space.
This on-chip memory stores the wiper position prior to power-down, thus enabling the devices to operate like mechanical potentiometers. This capability results in a significant size reduction compared to mechanical pots. The MAX5432-MAX5435 also offers ratiometric and end-to-end temperature coefficients as low as 5 ppm/°C and 35 ppm/°C, respectively.
These new digital potentiometers save power by requiring less than 1 μA in standby and operating from a 2.7-V to 5.25-V single supply. End-to-end resistances of 50 kΩ
and 100 kΩ are available. The MAX5432-MAX5435 are available in two wiper configurations: voltage divider or variable resistor. An I²C-compatible, 2-wire serial interface adjusts the wiper position up and down the resistor ring. Four addressing options per device allow multiple devices to share the same I²C bus.
Pricing start at 63 cents (1000-up, FOB USA).
Purchase of I²C components from Maxim Integrated Products, Inc., or one of its sublicensed associated companies, conveys a license under the Philips I²C patent rights to use these components in an I²C system, provided that the system conforms to the I²C standard specification as defined by Philips.