MAX5387LAUD+

Overview

The MAX5387LAUD+ is a dual, volatile, low-voltage linear taper digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated. It features two independent potentiometers with 256 tap positions and an end-to-end resistance of 10kΩ. The device operates from a single +2.6V to +5.5V supply and includes an I2C-compatible interface for control. Key electrical characteristics include a low quiescent supply current of less than 1μA, a temperature coefficient of 35ppm/ºC, and a power-on wiper reset to midscale. It is housed in a 14-pin TSSOP package and specified over an operating temperature range of -40ºC to +125ºC.

Feature Summary

• Dual 256-tap linear taper digital potentiometers with 10kΩ end-to-end resistance
• I2C-compatible serial interface supporting up to eight devices on one bus via address inputs A0-A2
• Low voltage operation from +2.6V to +5.5V with standby current under 1μA
• Power-on wiper initialization to midscale (D=80H) and automotive temperature range (-40ºC to +125ºC)

Applications

• Low-voltage battery applications and portable electronics
• Mechanical potentiometer replacement in consumer devices
• Offset and gain control in amplifier circuits
• Adjustable voltage references and linear regulators

Procurement Notes

Verify the specific suffix 'LAUD+' corresponds to the 10kΩ resistance variant in the 14-pin TSSOP package. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the I2C bus configuration supports the required number of slave addresses using pins A0, A1, and A2. Check for availability constraints or lead times through authorized distributors.

Selection Notes

Select the MAX5387LAUD+ when a 10kΩ resistance value is required; use MAX5387MAUD+ for 50kΩ or MAX5387NAUD+ for 100kΩ. Consider the volatile memory nature, which resets wipers to midscale upon power-up. Ensure the application environment stays within the -40ºC to +125ºC temperature range. Verify that the I2C clock frequency does not exceed 400 kHz.

Part Context

The MAX5387 series belongs to a family of dual digital potentiometers offering 10kΩ, 50kΩ, and 100kΩ options. All variants share identical pinouts, interfaces, and electrical specifications except for the end-to-end resistance value. The LAUD+ suffix specifically denotes the 10kΩ version in a lead-free, RoHS-compliant TSSOP-14 package.

Replacement Considerations

Direct functional substitutes within the same family include MAX5387MAUD+ (50kΩ) and MAX5387NAUD+ (100kΩ), provided the resistance difference is acceptable for the circuit design. Other digital potentiometers with I2C interfaces may require verification of pin compatibility, voltage ranges, and memory volatility.