MAX5494

10位，双路，非易失，线性变化数字电位器 10-Bit, Dual, Nonvolatile, Linear-Taper Digital Potentiometers

Description

The –MAX5499 10-bit 1024-tap, dual, nonvolatile, linear-taper, programmable voltage-dividers and variable resistors perform the function of a mechanical potentiometer, but replace the mechanics with a 3-wire SPI™-compatible serial interface. The MAX5494/MAX5495 are dual, 3-terminal, programmable voltage-dividers; the MAX5496/MAX5497 are dual, 2-terminal variable resistors; and the MAX5498/MAX5499 include one 2-terminal variable resistor and one 3-terminal programmable voltage-divider.

The MAX5494–MAX5499 feature an internal, nonvolatile, electrically erasable programmable read-only memory EEPROM that stores the wiper position for initialization during power-up. The 3-wire SPI-compatible serial interface allows communication at data rates up to 7MHz.

The MAX5494–MAX5499 are ideal for applications requiring digitally controlled potentiometers. End-to-end resistance values of 10kΩ and 50kΩ are available with a 35ppm/°C end-to-end temperature coefficient. The ratiometric temperature coefficient is 5ppm/°C for each channel, making these devices ideal for applications requiring low-temperature-coefficient programmable voltage-dividers such as low-drift, programmable-gain amplifiers.

The MAX5494–MAX5499 operate with either a single power supply +2.7V to +5.25V or dual power supplies ±2.5V. The devices consume 400µA max of supply current when writing data to the nonvolatile memory and 1.5µA max of standby supply current. The devices are available in space-saving 5mm x 5mm x 0.8mm, 16-pin TQFN package and are specified over the extended -40°C to +85°C temperature range.