MAX5393MAUD 256-Tap Linear Taper SPI Digital Potentiometer TSSOP-14 Integrated Circuit Chip

The MAX5393MAUD is a dual-channel, 256-tap, volatile linear taper digital potentiometer in a 14-Pin TSSOP package. Wiper positions are set over an SPI-compatible bus, so the divider ratio between each end terminal and its wiper is trimmed in 256 discrete steps with no mechanical contact.

Operation is from a single +1.7 V to +5.5 V supply, with 12 microamp typical of quiescent current, which suits battery-backed and always-on trim circuits. A 35 ppm per degree C end-to-end temperature coefficient keeps the setting stable, and power-on logic places both wipers at midscale so the circuit starts from a known state.

End-to-end resistance for this part number is 50 kilohm, so one board layout can be matched to several divider ratios by changing only the suffix. Because the wiper setting is volatile, the value is reloaded by the host at each power-up, which is the preferred behaviour where firmware recalculates the setting at boot.

Replacing a mechanical trimmer with the MAX5393MAUD removes wiper wear, contact bounce and manual adjustment from production. Calibration is executed by test software in milliseconds and repeats identically on every unit shipped.

The MAX5393MAUD is specified from -40 to +125 degree C, is RoHS compliant and lead free, and ships with full traceability. Samples and volume pricing are available on request.

• Dual 256-tap linear taper digital potentiometers
• End-to-end resistance 50 kilohm
• Volatile wiper setting with power-on midscale default
• SPI-compatible interface
• Single +1.7 V to +5.5 V supply operation
• Quiescent supply current 12 microamp typical
• Low 35 ppm per degree C end-to-end temperature coefficient
• -40 to +125 degree C operating temperature range
• 14-Pin TSSOP surface mount package
• RoHS compliant and lead free

• Adjustable voltage references and linear regulator trimming
• Low-voltage battery powered instruments
• Mechanical potentiometer replacement
• Offset and gain calibration
• Portable consumer electronics

Typical use is digitally controlled resistance and divider trimming in surface mount assemblies.

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