AD5220BRZ100-REEL7

Overview

The AD5220BRZ100-REEL7 is a single-channel, 7-bit digital potentiometer IC manufactured by Analog Devices. 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, drawing a typical supply current of 15 µA at 5 V. It utilizes a three-wire serial interface consisting of Chip Select (CS), Clock (CLK), and Up/Down (U/D) inputs for wiper control. The component is housed in an 8-lead SOIC package and supports operation within a temperature range of -40°C to +85°C.

Feature Summary

• 7-bit resolution providing 128 discrete wiper positions
• Nominal resistance options including 100 kΩ with ±30% tolerance
• Three-wire serial interface (CS, CLK, U/D) for digital control
• Volatile memory retains settings only while powered

Applications

• Programmable gain amplifier circuits
• Voltage divider applications requiring digital adjustment
• Variable resistor implementations in sensor signal conditioning

Procurement Notes

Verify the specific suffix 'REEL7' corresponds to tape and reel packaging requirements for automated assembly lines. Confirm that the 'BRZ' designation indicates RoHS compliance and lead-free termination status as per the manufacturer's ordering guide. Ensure the 100 kΩ resistance value matches the circuit design specifications before procurement.

Selection Notes

Select this model when a high-resistance digital potentiometer (100 kΩ) is required. Note that the 100 kΩ version exhibits higher settling times (6 ms) compared to lower resistance variants. The volatile memory requires external battery backup or frequent re-initialization upon power loss. Verify that the 3-wire interface timing constraints meet the system clock speed requirements.

Part Context

This part belongs to the AD5220 family of single-channel digital potentiometers. The 'BRZ' suffix denotes the commercial temperature grade (-40°C to +85°C) and RoHS-compliant SOIC-8 package. The '100' indicates the 100 kΩ nominal resistance variant. The '-REEL7' suffix specifies the reel packaging format used for surface-mount technology assembly.

Replacement Considerations

Direct pin-compatible replacements within the same series include AD5220BRZ50 (50 kΩ) and AD5220BRZ10 (10 kΩ). These alternatives share identical interfaces and packages but differ in nominal resistance and dynamic performance characteristics such as bandwidth and settling time.