AD5220BNZ100

Overview

The AD5220BNZ100 is a 100 kΩ, 128-position digitally controlled variable resistor in an 8-lead PDIP package. It operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device features a three-wire serial interface (CLK, CS, U/D) for setting the wiper position, which defaults to mid-scale upon power-on. Electrical specifications include a nominal resistor tolerance of ±30%, a temperature coefficient of 800 ppm/°C, and a wiper resistance of up to 100 Ω at 5 V. The component supports rheostat and potentiometer divider modes with guaranteed monotonic operation.

Feature Summary

• 128-position resolution with 7-bit digital control via serial interface
• Single-supply operation from 2.7 V to 5.5 V
• Nominal resistance options: 10 kΩ, 50 kΩ, or 100 kΩ
• Guaranteed monotonic performance without missing codes

Applications

• Programmable gain amplifiers
• Variable voltage references
• Digital potentiometer replacement in calibration circuits

Procurement Notes

Verify RoHS compliance status indicated by the 'Z' suffix in the part number. Confirm the specific resistance value corresponds to the final digits '100'. Check manufacturing date codes against current availability as this component family has undergone discontinuation notices for certain variants. Ensure ESD precautions are observed during handling due to CMOS input sensitivity.

Selection Notes

Select the AD5220BNZ100 when a 100 kΩ end-to-end resistance is required. Compare against AD5220BNZ50 or AD5220BNZ10 if lower resistance values suit the application's current limits. Consider the SOIC or MSOP packages if surface mount technology is preferred over the through-hole PDIP option. Verify that the 800 ppm/°C temperature coefficient meets the thermal stability requirements of the design.

Part Context

This component belongs to the AD5220 family of single-channel digital potentiometers. It serves as a solid-state alternative to mechanical potentiometers in applications requiring remote adjustment or automated calibration. The device integrates a non-volatile memory-less architecture where the wiper position is volatile and resets to mid-scale upon power cycling.

Replacement Considerations

Direct pin-compatible substitutes within the same series include AD5220BRZ100 (SOIC package) and AD5220BRMZ100 (MSOP package). Automotive-grade equivalents are available as AD5220WBRZ100. Verify that any replacement maintains the 100 kΩ resistance value and 128-position resolution.