AD5220BNZ50

Overview

The AD5220BNZ50 is a single-channel, 7-bit digital potentiometer IC manufactured by Analog Devices Inc. It features a nominal end-to-end resistance of 50 kΩ with a linear taper and 128 tap positions. The device operates on a single power supply ranging from 2.7 V to 5.5 V, drawing a typical supply current of 15 µA at 5 V. It utilizes an Up/Down (U/D) serial interface controlled by Chip Select (CS), Clock (CLK), and Direction pins. The component 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

• 7-bit resolution providing 128 discrete wiper positions for precise resistance adjustment.
• Up/Down serial interface allows control via simple clock and direction signals without complex protocol overhead.
• Volatile memory retains wiper position only while powered; resets to mid-scale upon power-up.
• Low power consumption with a typical supply current of 15 µA at VDD = 5 V.

Applications

• Programmable gain amplifiers requiring variable resistance settings.
• Voltage divider circuits for adjustable reference voltages.
• Digital trimming of analog signal paths in instrumentation.
• Audio volume control applications utilizing the rheostat mode.

Procurement Notes

Verify the specific suffix 'BNZ50' to confirm the 50 kΩ resistance value and PDIP package style. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors, as manufacturing processes may update environmental declarations over time.

Selection Notes

Select this model when a 50 kΩ nominal resistance is required. Ensure the application can tolerate volatile storage, as the wiper position is lost upon power loss. Verify that the system logic levels are compatible with the specified VIH and VIL thresholds for the chosen supply voltage.

Part Context

This component belongs to the AD5220 family of digital potentiometers. Other variants in the series include models with 10 kΩ and 100 kΩ resistances, as well as different package options such as SOIC and MSOP. The 'B' indicates the commercial temperature grade, while 'N' denotes the PDIP package.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD5220BNZ10 (10 kΩ) and AD5220BNZ100 (100 kΩ). When substituting, verify that the nominal resistance values match the circuit requirements, as changing resistance affects bandwidth and settling time characteristics.