AD5222BRU100-REEL7

Digital Potentiometers Overview

The AD5222BRU100-REEL7 is a dual-channel, 128-position digital potentiometer from Analog Devices. It features two variable resistors with a nominal end-to-end resistance of 100 kΩ and a temperature coefficient of -35 ppm/°C. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V or a dual supply of ±2.7 V. It utilizes an Increment/Decrement interface controlled by Chip Select (CS), Clock (CLK), and Up/Down (U/D) inputs. The component is housed in a TSSOP-14 package and is designed for industrial temperatures between -40°C and +85°C.

Digital Potentiometers Feature Summary

• Dual-channel architecture with 128 tap positions per channel
• Nominal resistance options including 100 kΩ with -35 ppm/°C temperature coefficient
• Increment/Decrement control interface compatible with push-button switches
• Low power consumption with maximum supply current of 40 µA

Digital Potentiometers Applications

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

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and resistance value. The 'RU' designation indicates a TSSOP-14 package, while 'R' typically denotes SOIC-14. Confirm availability status as distribution channels may list varying stock levels or end-of-life statuses that differ from official manufacturing records.

Digital Potentiometers Selection Notes

Select this model when a dual-channel digital solution with an Increment/Decrement interface is required instead of SPI or I2C. Ensure the system design accommodates the 100 kΩ nominal resistance and the specified 2.7 V to 5.5 V operating voltage range. Verify that the application does not require non-volatile memory storage, as this device retains settings only during power.

Digital Potentiometers Part Context

This component belongs to the AD5222 family of dual digital potentiometers. It serves as an electronic alternative to mechanical pots, optimized for instrument and test equipment push-button interfaces. The BRU100 variant specifically denotes the 100 kΩ resistance value within the TSSOP-14 surface-mount package configuration.

Digital Potentiometers Replacement Considerations

For SPI-compatible interfaces, consider the AD5203, AD5206, AD7376, or AD8400 series. For different resistance values within the same Increment/Decrement family, check AD5222BR10 (10 kΩ), AD5222BR50 (50 kΩ), or AD5222BR1M (1 MΩ).

Digital Potentiometers FAQ

How is the wiper position controlled?

The wiper position is set by pulsing the CLK pin while CS is active low. The direction is determined by the U/D input: logic high increments toward Terminal A, and logic low decrements toward Terminal B.

What is the default wiper position at power-on?

Upon power-up, the AD5222 initializes with the wiper in a centered position, exhibiting nearly equal resistances from the wiper to both Terminal A and Terminal B.

Can the two channels be adjusted independently?

Yes. In Independent Mode (MODE = Logic 1), the DACSEL pin selects which channel (RDAC1 or RDAC2) responds to clock pulses. In Common Mode (MODE = Logic 0), both wipers increment together.