AD5220BR10

Overview

The AD5220BR10 is a single-channel, 128-position digital potentiometer from Analog Devices Inc., housed in an 8-lead SOIC_N package. It features a nominal resistance of 10 kΩ with a ±30% tolerance and an 800 ppm/°C temperature coefficient. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V or dual supplies of ±2.7 V. Control is managed via a 3-wire SPI-compatible serial interface using CLK, CS, and U/D pins. It includes an internal power-on midscale preset and supports rheostat and voltage divider modes.

Feature Summary

• 128-position resolution with 7-bit control
• Nominal resistance options: 10 kΩ (specifically BR10)
• 3-wire SPI-compatible serial interface
• Single supply operation: 2.7 V to 5.5 V

Applications

• Mechanical potentiometer replacement
• Programmable gain and offset adjustment in instrumentation
• Programmable filters, delays, and time constants
• Line impedance matching

Procurement Notes

Verify the specific suffix 'BR10' confirms the 10 kΩ resistance value and SOIC_N package type. Confirm RoHS compliance status if required by the design specification. Check for automotive grade variants (AD5220W) if operating conditions exceed commercial limits.

Selection Notes

Select this component when a single-channel variable resistor with 128 steps is needed. Ensure the system logic levels match the 2.7 V to 5.5 V input requirements. Consider the 40 Ω wiper resistance impact on low-resistance applications. Verify thermal dissipation capabilities within the SOIC_N package constraints.

Part Context

The AD5220 series includes variants with 10 kΩ, 50 kΩ, and 100 kΩ resistances. The BR10 variant specifically denotes the 10 kΩ version in the SOIC_N package. Other packages include PDIP and MSOP. The series shares identical pinouts and control logic across resistance values.

Replacement Considerations

Direct substitutes include other AD5220 variants with different resistance values (e.g., AD5220BR50, AD5220BR100) if resistance scaling is acceptable. Cross-family replacements require verification of interface compatibility and pinout alignment.