General Description

The MAX5402 µPoT™ digital potentiometer is a 256-tap variable resistor with 10kΩ total resistance in a tiny 8-pin µMAX package. This device functions as a mechanical potentiometer, consisting of a fixed resistor string with a digitally controlled wiper contact. It operates from +2.7V to +5.5V single-supply voltages and uses an ultra-low 0.1µA supply current. This device also provides glitchless switching between resistor taps, as well as a convenient power-on reset (POR) that sets the wiper to the midscale position at power-up. A low 5ppm/°C ratiometric temperature coefficient makes it ideal for applications requiring low drift.

Features

♦ Small Footprint, 8-Pin µMAX Package

♦ Ultra-Low 100nA Supply Current

♦ +2.7V to +5.5V Single-Supply Operation

♦ 256 Tap Positions

♦ Low Ratiometric Temperature Coefficient 5ppm/°C

♦ Low End-to-End Resistor Temperature Coefficient 35ppm/°C

♦ Power-On Reset: Wiper Goes to Midscale (Position 128)

♦ Glitchless Switching Between the Resistor Taps

♦ 3-Wire SPI™-Interface Compatible

♦ 10kΩ Resistor Value