AD5222BRZ10

Digital Potentiometers Overview

The AD5222BRZ10 is a dual-channel, 7-bit (128-position) digitally controlled variable resistor with a nominal end-to-end resistance of 10 kΩ. It operates on a single supply from 2.7 V to 5.5 V or a dual supply of ±2.3 V to ±2.7 V. The device features an increment/decrement interface using CS, CLK, and U/D inputs, eliminating the need for microcontrollers in push-button applications. Key electrical parameters include a maximum supply current of 40 µA, a wiper resistance of 45 Ω to 100 Ω, and a temperature coefficient of –35 ppm/°C. It is housed in a 14-lead SOIC package.

Digital Potentiometers Feature Summary

• Dual-channel architecture with independent or common-mode control via MODE and DACSEL pins.
• Increment/Decrement digital interface compatible with mechanical switches or logic circuits.
• Low power consumption with a maximum supply current of 40 µA.
• Internal power-on reset centers the wiper position at approximately mid-scale.

Digital Potentiometers Applications

• Stereo channel audio level control
• Mechanical potentiometer replacement in instrumentation
• Remote incremental adjustment systems
• Programmable voltage-to-current conversion

Digital Potentiometers Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the SOIC-14 package and lead-free status as defined in the manufacturer's ordering guide. Confirm that the '10' designation matches the required 10 kΩ resistance value. Ensure compatibility with the -40°C to +85°C industrial temperature range specified for this variant.

Digital Potentiometers Selection Notes

Select this component when a dual-channel digital potentiometer with simple up/down control is required instead of SPI interfaces. The 10 kΩ resistance offers a balance between bandwidth (1 MHz typical) and power dissipation. Consider the volatile memory nature, which requires re-initialization upon power loss, unlike non-volatile variants.

Digital Potentiometers Part Context

The AD5222 series includes variants with 10 kΩ, 50 kΩ, 100 kΩ, and 1 MΩ resistances. The BRZ suffix indicates a RoHS-compliant SOIC-14 package, while BRU denotes a TSSOP-14 option. All variants share the same 128-position resolution and digital interface functionality.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include AD5222BRZ50 (50 kΩ), AD5222BRZ100 (100 kΩ), and AD5222BRZ1M (1 MΩ). For different packages, AD5222BRU10 provides the same electrical characteristics in a TSSOP-14 footprint.

Digital Potentiometers FAQ

How does the AD5222 handle wiper position during power-up?

Upon power-up, the internal power-on reset (POR) circuitry automatically sets both wipers to a centered position, providing nearly equal resistance values to terminals A and B.

What is the difference between Common Mode and Independent Mode?

In Common Mode (MODE = 0), both wipers increment or decrement together, preserving their relative distance. In Independent Mode (MODE = 1), only the wiper selected by the DACSEL pin changes position.

Can the AD5222 be controlled directly by mechanical switches?

Yes, the increment/decrement interface is designed for direct connection to mechanical or push-button switches, though external debounce circuitry is recommended to ensure clean clock signals.