AD5233BRUZ100

Digital Potentiometers Overview

The AD5233BRUZ100 is a quad-channel, nonvolatile digitally controlled potentiometer (RDAC) featuring 64-position resolution and 100 kΩ terminal resistance. It operates on a single 2.7 V to 5.5 V supply or ±2.5 V dual supply. The device integrates four independent RDACs with persistent EEMEM storage for wiper settings and 11 bytes of user-defined data. Control is managed via an SPI-compatible serial interface supporting readback, increment/decrement, and logarithmic adjustment modes. It is housed in a 24-lead TSSOP package and functions within an industrial temperature range of −40°C to +85°C.

Digital Potentiometers Feature Summary

• Quad-channel architecture with 64-step digital resolution
• Nonvolatile EEMEM stores wiper positions and 11 bytes of user data
• SPI-compatible serial interface with readback capability
• Permanent memory write protection via WP pin

Digital Potentiometers Applications

• Mechanical potentiometer replacement
• Instrumentation gain and offset adjustment
• Programmable voltage-to-current conversion
• Sensor calibration

Digital Potentiometers Procurement Notes

Verify the specific suffix '100' corresponds to the 100 kΩ resistor tolerance variant when sourcing. Confirm the package type matches the required 24-lead TSSOP footprint. Ensure the design supports the necessary serial clock speeds and voltage levels for the SPI interface.

Digital Potentiometers Selection Notes

Select this component when four independent variable resistors are required in a single package. The 100 kΩ version suits applications requiring higher impedance nodes. Consider the 100-year data retention and 100,000 cycle endurance if frequent nonvolatile updates are planned.

Digital Potentiometers Part Context

This part belongs to the AD5233 family of quad-channel digital potentiometers. Variants differ primarily by terminal resistance values (10 kΩ, 50 kΩ, and 100 kΩ). All variants share identical pinouts, control logic, and nonvolatile memory structures.

Digital Potentiometers Replacement Considerations

Direct substitutes include other AD5233 variants with different resistance values (AD5233BRUZ10, AD5233BRUZ50) if the circuit impedance allows. Cross-family replacements require verifying SPI compatibility and pinout alignment.

Digital Potentiometers FAQ

How is the wiper position restored after power loss?

The wiper position is automatically refreshed from the internal EEMEM register upon power-up. The restore time is typically 140 μs.

What is the function of the PR pin?

The PR (Preset) pin is an optional hardware override that refreshes the scratchpad register with the current contents of the EEMEM register when strobed high.

Can the device operate with bipolar supplies?

Yes, the AD5233 can operate from a dual supply of ±2.5 V, allowing for ground-referenced bipolar signal adjustment.