AD5121BCPZ10-RL7

Overview

The AD5121BCPZ10-RL7 is a single-channel, nonvolatile digital potentiometer featuring 128 adjustment positions. It offers a 10 kΩ resistance option with an 8% maximum tolerance and a 35 ppm/°C temperature coefficient. The device supports both SPI and I2C interfaces via the DIS pin and operates on a single supply from 2.3 V to 5.5 V or dual supplies of ±2.25 V to ±2.75 V. It includes independent logic supply support (1.8 V to 5.5 V), a 3 MHz bandwidth, and fast start-up time under 75 µs. Packaged in a 16-lead, 3 mm × 3 mm LFCSP, it is qualified for automotive applications.

Feature Summary

• Single-channel architecture with 128-position resolution and nonvolatile EEPROM storage.
• Dual interface capability: Selectable between SPI and I2C using the DIS pin.
• Wide operating voltage range: 2.3 V to 5.5 V single supply or ±2.25 V to ±2.75 V dual supply.
• High bandwidth of 3 MHz and low total harmonic distortion (-80 dB at 1 kHz).

Applications

• Portable electronics level adjustment
• LCD panel brightness and contrast controls
• Programmable filters, delays, and time constants
• Programmable power supplies

Procurement Notes

Verify the specific suffix 'BCPZ10-RL7' against the manufacturer's ordering guide to confirm package type, tape/reel quantity, and compliance status. Ensure the design accounts for the exposed pad connection requirements for thermal performance and electrical grounding as specified in the outline dimensions section.

Selection Notes

Select this component when a single-channel digital potentiometer with nonvolatile memory is required. The 10 kΩ resistance value suits moderate current applications up to ±6 mA. Choose between SPI and I2C based on system bus availability by configuring the DIS pin. Verify that the 3 mm × 3 mm LFCSP package fits the PCB footprint constraints.

Part Context

This part belongs to the AD5121/AD5141 family of single-channel digital potentiometers. The AD5121 variant provides 128 positions, whereas the AD5141 offers 256 positions. Both share identical electrical characteristics, interface options, and packaging, differing primarily in resolution and code word length.

Replacement Considerations

Direct functional replacements within the same family include the AD5141BCPZ10-RL7 for higher resolution (256 positions). For quad-channel requirements, consider the AD5124 series. Ensure any substitute maintains the 10 kΩ resistance value and LFCSP-16 package compatibility.