Features and Benefits
- 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
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.
The MAX5402 serves 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 35ppm/°C makes this part suitable for use as a variable resistor in applications such as low-tempco adjustable gain and other circuit configurations. This 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
MAX5402 Reliability Data1/12/2023
Voltage Standing Wave Ratio Definition and Formula11/15/2012
Calibrating a Power Supply with a Digital Potentiometer4/20/2012
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface3/8/2011
DACs vs. Digital Potentiometers: Which Is Right for My Application?4/11/2007
How to Increase the Bandwidth of Digital Potentiometers 10x to 100x3/29/2004
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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