General Description

The MAX5400/MAX5401 digital potentiometers offer 256-tap SOT-PoT? digitally controlled variable resistors in tiny 8-pin SOT23 packages. Each device functions as a mechanical potentiometer, consisting of a fixed resistor string with a digitally controlled wiper contact. They operate from +2.7V to +5.5V single-supply voltages and use an ultra-low supply current of 0.1μA. These devices also provide glitchless switching between resistor taps, as well as a convenient power on reset 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.

特性 Features

? Miniature 8-Pin SOT23 (3mm x 3mm)

? 256 Tap Positions

? Ultra-Low 0.1μA Supply Current

? Single-Supply Operation: +2.7V to +5.5V

? Low Ratiometric Temperature Coefficient: 5ppm/°C

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

? Glitchless Switching Between the Resistor Taps

? 3-Wire SPI?-Interface Compatible

? 50k?/100k? Resistor Values

Applications

? Mechanical Potentiometer Replacement

? Low-Drift PGAs

? Adjustable Voltage References

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