AD5222BRZ1M

Digital Potentiometers Overview

The AD5222BRZ1M is a dual-channel, 128-position digital potentiometer from Analog Devices. It features two independent variable resistors with nominal end-to-end resistance of 1 MΩ and a linear taper. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V or a dual supply configuration. Control is managed via an Increment/Decrement interface using Chip Select (CS), Clock (CLK), and Up/Down (U/D) inputs. Key electrical specifications include a nominal resistor tolerance of ±30%, a temperature coefficient of –35 ppm/°C, and a maximum power dissipation of 400 mW at 5 V. The unit is housed in a 14-lead SOIC package.

Digital Potentiometers Feature Summary

• Dual-channel architecture with 128 tap positions per channel
• Increment/Decrement control interface compatible with push-button switches
• Nominal resistance of 1 MΩ with –35 ppm/°C temperature coefficient
• Operates on single supply (2.7 V to 5.5 V) or dual supply (±2.7 V)

Digital Potentiometers Applications

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

Digital Potentiometers Procurement Notes

Verify the specific resistance value suffix in the part number, as the AD5222 series includes variants for 10 kΩ, 50 kΩ, 100 kΩ, and 1 MΩ. Confirm the package type matches the design requirements, as the BRZ suffix indicates the SOIC-14 package, while other suffixes may denote TSSOP-14. Ensure that the ordering documentation explicitly lists the 1 MΩ variant to avoid confusion with lower resistance models in the same family.

Digital Potentiometers Selection Notes

Select this component when a digitally controlled variable resistor is required without microcontroller overhead. The Increment/Decrement interface allows direct connection to mechanical switches or simple logic circuits. Consider the 1 MΩ resistance value for low-power applications, noting that bandwidth decreases significantly at higher resistance values compared to the 10 kΩ variant. Verify that the system voltage falls within the 2.7 V to 5.5 V range for proper operation.

Digital Potentiometers Part Context

The AD5222 belongs to the AD522x family of dual digital potentiometers. It serves as an electronic alternative to mechanical pots in test equipment and instrument front panels. Unlike SPI-compatible models such as the AD5203, this device uses a simpler up/down counter interface. The 'BRZ' designation specifically identifies the industrial temperature grade (-40°C to +85°C) and the SOIC-14 surface-mount package.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same package are limited due to the specific Increment/Decrement interface. For SPI-based systems, consider the AD5203 or AD5206. For I2C interfaces, the AD5241 or AD5242 series offers similar functionality but requires different control logic. Ensure any substitute supports the required 1 MΩ resistance and dual-channel configuration.