AD5220BR50

Overview

The AD5220BR50 is a single-channel, 7-bit digital potentiometer with a nominal resistance of 50 kΩ and 128 tap positions. It operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a typical supply current of 15 µA. The device features an Up/Down control interface for wiper adjustment and includes internal power-on reset logic that initializes the wiper to the mid-scale position. It supports both rheostat and potentiometer divider modes, offering a temperature coefficient of 800 ppm/°C for resistor variation.

Feature Summary

• 7-bit resolution providing 128 distinct wiper positions
• Up/Down serial interface for direct wiper control without complex protocol handling
• Internal power-on reset sets wiper to mid-scale upon initialization
• Nominal resistance tolerance of ±30% at +25°C

Applications

• Mechanical potentiometer replacement in industrial equipment
• Programmable gain amplifiers and offset adjustment circuits
• Adjustable voltage-to-current conversion stages
• Programmable filters and time constant tuning

Procurement Notes

Verify the specific suffix 'R' indicates the SOIC-8 package variant when sourcing. Confirm RoHS compliance status if required by assembly specifications. Check for automotive-grade 'W' variants if operating conditions exceed commercial limits or require specific reliability standards. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS inputs.

Selection Notes

Select this component when a simple Up/Down control interface is preferred over SPI or I2C protocols. The 50 kΩ value balances bandwidth and power consumption; lower resistance offers higher bandwidth while higher resistance reduces power dissipation. Verify that the 128-position resolution meets the required adjustment granularity for the target application.

Part Context

The AD5220 series includes variants with 10 kΩ, 50 kΩ, and 100 kΩ nominal resistances. The BR50 designation specifically identifies the 50 kΩ version packaged in an 8-lead Small Outline Integrated Circuit (SOIC). Other series members include PDIP and MSOP packages, as well as automotive-qualified versions designated with a 'W' suffix.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD5220BR10 (10 kΩ) and AD5220BR100 (100 kΩ), provided the resistance value difference is acceptable for the circuit design.