AD5220BRZ100

Overview

The AD5220BRZ100 is a single-channel, 7-bit digital potentiometer IC manufactured by Analog Devices Inc. It features a nominal end-to-end resistance of 100 kΩ with 128 tap positions and volatile memory. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a typical supply current of 15 µA at 5 V. It utilizes an Up/Down serial interface for wiper control and is housed in an 8-lead SOIC package. Key electrical characteristics include a nominal resistor tolerance of ±30%, a temperature coefficient of 800 ppm/°C, and a wiper resistance of up to 100 Ω.

Feature Summary

• 100 kΩ nominal resistance with 128-position resolution (7 bits)
• Up/Down serial interface requiring Clock, Chip Select, and Direction pins
• Volatile memory retains settings only while power is applied
• Operates within a 2.7 V to 5.5 V supply range

Applications

• Programmable gain amplifiers
• Voltage divider circuits
• Variable resistor replacement in rheostat mode

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm the package type and resistance value. Ensure the selected variant matches the required thermal and mechanical specifications for the target PCB layout. Confirm RoHS compliance status if environmental regulations apply to the assembly process.

Selection Notes

Select this component when a high-resistance digital potentiometer is required. The 100 kΩ version offers lower power consumption compared to lower resistance variants but exhibits slower settling times. Consider the ±30% tolerance and 800 ppm/°C temperature coefficient for precision applications. Ensure the circuit design accounts for the volatile nature of the wiper position upon power cycling.

Part Context

This part belongs to the AD5220 family of single-channel digital potentiometers. The 'BRZ' designation indicates an 8-lead SOIC package with RoHS compliance. The '100' suffix specifies the 100 kΩ nominal resistance value. Other family members include 10 kΩ and 50 kΩ variants and different package options such as PDIP and MSOP.

Replacement Considerations

Direct replacements within the same family include AD5220BRZ50 (50 kΩ) and AD5220BRZ10 (10 kΩ). These share identical pinouts and interfaces but differ in resistance values and dynamic performance characteristics such as bandwidth and settling time.