AD5144BCPZ100-RL7

Overview

The AD5144BCPZ100-RL7 is a quad-channel, nonvolatile digital potentiometer featuring 256 tap positions and a nominal resistance of 100 kΩ. It supports both SPI and I2C digital interfaces for wiper control and status readback. The device operates on a single supply voltage ranging from 2.3 V to 5.5 V or dual supplies up to ±2.75 V, with an independent logic supply between 1.8 V and 5.5 V. Key electrical characteristics include a maximum resistor tolerance of 8%, a temperature coefficient of 35 ppm/°C, and a bandwidth of 0.43 MHz at 100 kΩ. It is housed in a 24-lead LFCSP package.

Feature Summary

• Quad-channel architecture with 256-position resolution and nonvolatile EEPROM storage
• Dual interface compatibility supporting standard SPI and I2C protocols
• Wide operating temperature range from -40°C to +125°C
• Low power consumption with 700 nA typical supply current at 5.5 V

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 ordering suffix RL7 corresponds to the reel packaging configuration required for your assembly line. Confirm that the B suffix indicates the standard 8% tolerance grade rather than the A grade variant. Ensure the LFCSP-24 footprint matches your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when four independent variable resistors are required within a single package. The 100 kΩ value suits applications requiring higher impedance nodes compared to the 10 kΩ option. Verify that the system logic levels align with the 1.8 V to 5.5 V VLOGIC range for reliable SPI/I2C communication.

Part Context

This part belongs to the AD5144 family of quad-channel digital potentiometers. It shares architectural similarities with the AD5124 but offers double the resolution (256 vs. 128 taps). The C suffix denotes the LFCSP package type, distinguishing it from TSSOP variants like the AD5144ABRUZ.

Replacement Considerations

The AD5144ABRUZ100-RL7 serves as a functional substitute if an I2C-only interface is sufficient, though it utilizes a TSSOP-20 package instead of LFCSP-24. The AD5124BCPZ100-RL7 provides identical pinout and features but with reduced 128-position resolution.