AD5220BRMZ10-REEL7

Overview

The AD5220BRMZ10-REEL7 is a single-channel, 128-position digital potentiometer manufactured by Analog Devices Inc. in an 8-lead Mini Small Outline Package (MSOP). It features a nominal end-to-end resistance of 10 kΩ and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device utilizes a three-wire serial interface consisting of Chip Select (CS), Serial Clock (CLK), and Up/Down (U/D) inputs to control the wiper position. Key electrical characteristics include a typical bandwidth of 650 kHz at 10 kΩ, a settling time of 0.6 ms, and a power supply sensitivity of 0.015 %/%. The unit powers on with the wiper centered and supports both rheostat and voltage divider modes.

Feature Summary

• 128-Position Resolution: Provides 7-bit resolution for precise variable resistance or voltage division control.
• Three-Wire Serial Interface: Controlled via CS, CLK, and U/D pins; negative-edge triggered clock input.
• Wide Supply Range: Operates reliably with VDD between 2.7 V and 5.5 V.
• High Bandwidth: Achieves 650 kHz -3 dB bandwidth with 10 kΩ terminal resistance.

Applications

• Programmable Gain Amplifiers
• Voltage Divider Networks
• Variable Resistor Replacement in Calibration Circuits

Procurement Notes

Verify the package type matches the RM-8 MSOP footprint and confirm the 10 kΩ resistance value. Ensure the ordering suffix corresponds to the reel packaging format required for automated assembly processes.

Selection Notes

Select this component when a compact, low-power digital potentiometer with high-speed response is needed. The 10 kΩ value offers a balance between bandwidth performance and power consumption compared to higher resistance variants.

Part Context

This part belongs to the AD5220 family of 128-position digital potentiometers. The BRMZ10 designation indicates the commercial temperature range (-40°C to +85°C), the 10 kΩ nominal resistance, and the MSOP-8 package. Other variants exist with different resistance values (50 kΩ, 100 kΩ) and packages.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD5220BRMZ50 (50 kΩ) and AD5220BRMZ100 (100 kΩ). Verify that the specific resistance value meets the circuit requirements before substituting.

FAQ

What is the default wiper position upon power-up?

The AD5220 powers on with the wiper in a centered position, exhibiting nearly equal resistances from the wiper to Terminal A and Terminal B.

How is the wiper direction controlled?

The direction is controlled by the logic state of the U/D (Up/Down) pin while the CS pin is active low. A high state increments the wiper toward Terminal A, and a low state decrements it toward Terminal B.

What is the maximum current allowed between the Wiper and Terminal B?

To avoid degradation or destruction of the internal switch contact, the current flow between the Wiper and Terminal B in the direct contact state should be limited to a maximum of 5 mA.