AD5220BNZ10

Overview

The AD5220BNZ10 is a single-channel digital potentiometer IC from Analog Devices, featuring 128 programmable tap positions (7-bit resolution) and a nominal resistance of 10 kΩ. 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 Clock (CLK), Chip Select (CS), and Direction (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. It is housed in an 8-lead Plastic Dual In-Line Package (PDIP) and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• 128-position variable resistor with linear taper and 7-bit resolution
• Up/Down serial control interface requiring only three pins (CLK, CS, U/D)
• Single supply operation from 2.7 V to 5.5 V
• Internal power-on mid-scale preset for centered wiper position at startup

Applications

• Mechanical potentiometer replacement in industrial controls
• Programmable gain amplifiers and offset adjustment circuits
• Programmable filters and time constant adjustments
• Line impedance matching applications

Procurement Notes

Verify the specific package option N-8 (8-Lead PDIP) and the resistance suffix '10' corresponding to 10 kΩ when sourcing replacements. Confirm RoHS compliance status indicated by the 'Z' suffix in the ordering code. Ensure the supplier provides documentation verifying the component meets the -40°C to +85°C industrial temperature range specifications.

Selection Notes

Select this component when a simple Up/Down interface is preferred over SPI or I2C protocols. The 10 kΩ value offers a balance between bandwidth and power consumption compared to higher resistance variants. Consider the ±30% tolerance and 800 ppm/°C temperature coefficient for precision requirements. The volatile memory requires external retention if power loss persistence is needed.

Part Context

This part belongs to the AD5220 family of 128-position digital potentiometers. The 'BNZ' designation indicates a through-hole PDIP package with RoHS compliance, while the trailing '10' specifies the 10 kΩ nominal resistance. Other variants in the series include 50 kΩ and 100 kΩ options, as well as surface-mount SOIC and MSOP packages.

Replacement Considerations

Direct pin-compatible substitutes within the same family include AD5220BNZ50 (50 kΩ) and AD5220BNZ100 (100 kΩ). Surface-mount equivalents such as AD5220BRZ10 offer identical electrical performance in an SOIC-8 package but require different PCB footprints.