MAX5433META+T

Overview

The MAX5433META+T is a single-channel, nonvolatile, linear-taper digital potentiometer featuring 32 tap positions and a nominal end-to-end resistance of 100kΩ. It operates on a single supply voltage ranging from +2.7V to +5.25V with a typical standby current of 0.5µA. The device utilizes a fast-mode I²C-compatible serial interface supporting data rates up to 400kbps. Key electrical characteristics include a temperature coefficient of 35ppm/°C end-to-end and 5ppm/°C ratiometric. Integral Nonlinearity (INL) and Differential Nonlinearity (DNL) are typically ±0.15 LSB. The component is housed in an 8-pin TDFN package with dimensions of 3mm x 3mm.

Feature Summary

• Nonvolatile EEPROM retains wiper position for 50 years at +85°C or 200,000 store cycles at +25°C.
• I²C-compatible serial interface allows communication at speeds up to 400kbps.
• Low power consumption with typical standby current of 0.5µA.
• Factory-preset I²C address selectable via the A0 pin logic state.

Applications

• Mechanical potentiometer replacement
• Low-drift programmable-gain amplifier circuit configurations
• Liquid-Crystal Display (LCD) screen adjustment

Procurement Notes

Verify the specific ordering suffix 'META' corresponds to the required I²C address configuration and tape-and-reel packaging format. Confirm that the 100kΩ resistance value aligns with the target circuit requirements. Ensure the design accommodates the 3mm x 3mm TDFN-EP package footprint and exposed pad thermal management specifications.

Selection Notes

Select this model over the MAX5432 variant when a higher resistance value of 100kΩ is required instead of 50kΩ. The MAX5433 provides access to High, Low, and Wiper terminals for voltage-divider configurations. Verify that the system's I²C bus can support the necessary pull-up resistors and that the A0 pin is correctly tied to VDD or GND to establish the unique slave address.

Part Context

This component belongs to the MAX5432–MAX5435 family of 32-tap, nonvolatile, linear digital potentiometers. While the MAX5432/MAX5434 offer 50kΩ resistance in a 6-pin SOT23 package, the MAX5433/MAX5435 provide 100kΩ resistance in an 8-pin TDFN package. All devices share identical control logic and memory architecture but differ in resistance values and physical form factors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the device handle wiper position upon power-up?

Upon power-up, the internal nonvolatile EEPROM automatically loads the previously stored wiper position into the volatile register, restoring the resistance setting without external intervention.

What is the maximum data rate supported by the serial interface?

The MAX5433META+T supports fast-mode I²C communication with a clock frequency (fSCL) up to 400kHz.

How is the I²C slave address determined for this specific part?

The first four bits are factory-set to 0101. Bits A2 and A1 are factory-programmed. For the MAX5433, the final bit A0 is an input pin; connecting it to VDD or GND selects one of two possible device addresses on the bus.