MAX5528GTA+T

Overview

The MAX5528GTA+T is a single-channel, linear-taper digital potentiometer with an end-to-end resistance of 50kΩ and 64 wiper tap positions. It operates on a single +2.7V to +5.5V supply with a maximum static current of 1.5µA. The device features a simple 2-wire up/down interface for sequential adjustment. It includes one-time programmable (OTP) memory that allows the power-on reset position to be set and locked via an 11V programming voltage. The component is housed in an 8-pin TDFN package with an exposed paddle and is rated for operation from -40°C to +105°C.

Feature Summary

• One-Time Programmable Memory: Sets and locks the power-on wiper position using a 6-step sequence with an 11V PV pin.
• Linear-Taper Digital Potentiometer: Provides 64 discrete tap positions along a 50kΩ resistor array.
• Low Power Consumption: Ultra-low standby supply current of 1.5µA maximum.
• Simple Interface: Controlled by a 2-wire serial interface (CS and U/D pins).
• Temperature Stability: 35ppm/°C end-to-end temperature coefficient and 5ppm/°C ratiometric temperature coefficient.

Applications

• LCD contrast control via adjustable voltage biasing.
• Programmable filters with adjustable gain or cutoff frequency.
• Adjustable voltage references using feedback resistor networks.

Procurement Notes

Verify the specific ordering suffix 'GTA' corresponds to the 8-pin TDFN-EP package with lead-free/RoHS compliance as indicated in the datasheet's ordering information table. Confirm the device status and availability through authorized distributors, as lifecycle status may vary.

Selection Notes

Select the MAX5528GTA+T when a 50kΩ end-to-end resistance is required. Choose this part over the MAX5527 (100kΩ) or MAX5529 (10kΩ) based on circuit impedance needs. Ensure the application requires the 8-pin TDFN package; use the GUA suffix variant if the µMAX package is preferred.

Part Context

This component belongs to the MAX5527/MAX5528/MAX5529 family of one-time programmable, linear-taper digital potentiometers. These devices replace mechanical potentiometers in applications requiring digitally controlled resistance adjustments while offering the benefit of fixed, non-volatile settings after OTP programming.

Replacement Considerations

Direct replacements within the same family include the MAX5527GTA+T (100kΩ) and MAX5529GTA+T (10kΩ), provided the resistance value matches the design requirements. For package variations, the MAX5528GUA+T offers the same electrical characteristics in an 8-pin µMAX package.