MAX5529GUA+T

Overview

The MAX5529GUA+T is a linear-taper digital potentiometer with a 10kΩ end-to-end resistance and 64 wiper tap positions. It operates on a single +2.7V to +5.5V supply, featuring an ultra-low static supply current of 1.5µA maximum. The device utilizes a simple 2-wire up/down interface for sequential wiper adjustment. It includes a one-time programmable feature that allows setting and locking the power-on reset position via an 11V programming voltage. The component is housed in an 8-pin µMAX package and is guaranteed to operate within the -40°C to +105°C temperature range.

Feature Summary

• 64 Tap Positions: Provides precise digital control over resistance settings across the resistor array.
• One-Time Programmable Memory: Allows permanent storage of the power-on wiper position and optional lockout of the serial interface.
• Low Temperature Coefficient: Features a 35ppm/°C end-to-end temperature coefficient and a 5ppm/°C ratiometric temperature coefficient.
• Ultra-Low Power Consumption: Draws a maximum of 1.5µA in standby mode, suitable for battery-operated applications.

Applications

• Mechanical Potentiometer Replacements
• LCD Contrast Control
• Programmable Filters

Procurement Notes

Verify the specific ordering suffix 'T' against official documentation to confirm tape-and-reel packaging status. Confirm RoHS compliance and lead-free status as indicated by the '+' suffix. Ensure the source material explicitly supports the requested quantity and delivery terms before finalizing procurement plans.

Selection Notes

Select the MAX5529GUA+T when a 10kΩ end-to-end resistance is required. Choose this model over the MAX5527 (100kΩ) or MAX5528 (50kΩ) based on circuit impedance needs. The µMAX package is selected for surface-mount assembly requirements. Verify that the 64-tap resolution meets the application's precision requirements.

Part Context

The MAX5529 is part of the MAX5527/MAX5528/MAX5529 family of one-time programmable, linear-taper digital potentiometers. These devices replace mechanical potentiometers using a 2-wire digital interface. The family shares identical pinouts and functional characteristics, differing primarily in their end-to-end resistance values of 100kΩ, 50kΩ, and 10kΩ respectively.

Replacement Considerations

The MAX5527GUA+ and MAX5528GUA+ are pin-compatible members of the same family but offer different resistance values (100kΩ and 50kΩ). Direct substitution requires verifying that the alternative resistance value aligns with the circuit design specifications.

FAQ

How is the wiper position locked after programming?

The wiper position is locked by pulsing the CS pin high seven times during the one-time programming sequence. This disables the up/down interface, preventing further adjustments.

What is the function of the PV pin?

The PV pin is used for one-time programming. An external voltage source of +11V to +11.55V must be applied to this pin to program the power-on reset position and optionally lock the wiper.

What is the typical standby supply current?

The typical standby supply current is 0.25µA, with a maximum specified limit of 1.5µA when CS and U/D are grounded or tied to VDD.