Features and Benefits
- 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
- 50kΩ/100kΩ Resistor Values
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.
The MAX5400/MAX5401 serve well in applications requiring digitally controlled resistors, including adjustable voltage references and programmable gain amplifiers (PGAs). A nominal end-to-end resistor temperature coefficient of 50ppm/°C allows these parts to be used as variable resistors in applications such as low-tempco adjustable gain and other circuit configurations.
Two resistance values are available: 50kΩ (MAX5400) and 100kΩ (MAX5401). Each device is guaranteed over the extended industrial temperature range (-40°C to +85°C).
- Adjustable Voltage Reference
- Low-Drift Programmable-Gain Amplifiers
- Mechanical Potentiometer Replacements
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Reduce the Chances of Human Error: Part 1, Power and Ground3/8/2011
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface3/8/2011
Well Grounded, Digital Is Analog12/19/2008
Logging the Linear Digital Potentiometer3/8/2007
Digital Adjustment of DC-DC Converter Output Voltage in Portable Applications8/6/2002
EPOT Applications: Gain Adjustment in Op-Amp Circuits11/28/2001
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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