AD5144BRUZ100-RL7

Overview

The AD5144BRUZ100-RL7 is a quad-channel, nonvolatile digital potentiometer featuring 256 tap positions and an SPI interface. It offers a nominal resistance of 100 kΩ with ±8% tolerance and a temperature coefficient of 35 ppm/°C. The device operates on a single supply from 2.3 V to 5.5 V or dual supplies up to ±2.75 V, with a logic supply range of 1.8 V to 5.5 V. Key electrical parameters include a maximum wiper current of ±1.5 mA for the 100 kΩ variant, a bandwidth of 0.43 MHz, and a fast startup time under 75 µs. It is housed in a 20-lead TSSOP package.

Feature Summary

• Quad-channel architecture with 256-position resolution and nonvolatile EEPROM storage
• SPI serial interface with independent logic supply (1.8 V to 5.5 V)
• Low temperature coefficient of 35 ppm/°C and ±8% resistor tolerance
• Fast startup time (< 75 µs) and wide operating temperature range (-40°C to +125°C)

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 reel packaging when sourcing. Confirm that the BRUZ designation indicates the B grade performance and TSSOP-20 package type. Ensure compatibility with standard SPI protocols before integration. Check for any recent process change notifications that may affect pinout or thermal characteristics.

Selection Notes

Select this component for applications requiring four independent digital potentiometers with memory retention. The 100 kΩ resistance value supports lower current loads compared to the 10 kΩ option. Verify that the system logic voltage falls within the 1.8 V to 5.5 V range for proper interface operation. Consider the TSSOP-20 package dimensions for PCB layout constraints.

Part Context

This part belongs to the AD5144 family of quad-channel digital potentiometers. It shares architectural similarities with the AD5124 but provides higher resolution with 256 taps instead of 128. The BRUZ suffix specifies the commercial/industrial temperature grade and surface-mount TSSOP packaging. It serves as a direct replacement for legacy analog potentiometers in multi-channel adjustment circuits.

Replacement Considerations

Direct functional substitutes within the same family include the AD5144BCPZ100-RL7, which offers identical specifications in a different LFCSP package. For I2C interface requirements, the AD5144A series provides equivalent performance with alternative control pins.