AD5220BR50-REEL7

Overview

The AD5220BR50-REEL7 is a single-channel digital potentiometer IC from Analog Devices, featuring a nominal resistance of 50 kΩ and 128 tap positions. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical supply current of 15 µA. The device utilizes an Up/Down serial interface controlled by CLK, CS, and U/D pins. Key electrical characteristics include a resistor tolerance of ±30%, a temperature coefficient of 800 ppm/°C, and a wiper resistance of 40 Ω to 100 Ω. It is housed in an 8-lead SOIC package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Single-channel variable resistor with 128 programmable tap positions
• Up/Down serial control interface requiring only three pins (CLK, CS, U/D)
• Nominal resistance options including 50 kΩ with ±30% tolerance
• Low power consumption with 15 µA typical supply current at 5 V

Applications

• Mechanical potentiometer replacement in compact designs
• Programmable gain amplifiers and offset adjustment circuits
• Voltage-to-current conversion systems
• Programmable filters and time constant adjustments

Procurement Notes

Verify the specific suffix REEL7 indicates reel packaging when sourcing. Confirm RoHS compliance status for the BR variant against current manufacturing standards. Ensure the 50 kΩ resistance value matches the circuit requirements, as other variants like 10 kΩ or 100 kΩ exist within the same family. Check for automotive qualified versions if environmental stress testing is required.

Selection Notes

Select this component for applications requiring simple incremental/decremental control without complex SPI protocols. The 50 kΩ value offers a balance between bandwidth and power dissipation compared to lower or higher resistance options. Consider the volatile memory nature, which resets to mid-scale upon power-up, ensuring initial circuit states are managed appropriately in the design phase.

Part Context

This part belongs to the AD5220 family of digital potentiometers, which provides a direct replacement for mechanical pots in various analog signal conditioning roles. The 'BR' designation typically refers to the commercial grade temperature range and SOIC package type, while '50' specifies the 50 kΩ end-to-end resistance. The family shares common architecture but varies in resistance values and package styles.

Replacement Considerations

Direct pin-compatible replacements within the same series include AD5220BR10 (10 kΩ) and AD5220BR100 (100 kΩ). For automotive applications, consider the AD5220WBRZ50 variant. Verify that the interface timing requirements for the Up/Down clock are met by the controlling microcontroller.