AD5142BCPZ100-RL7

Overview

The AD5142BCPZ100-RL7 is a dual-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 supports single or dual supply operation (VDD: 2.3 V to 5.5 V; VSS: 0 V to -2.75 V) with an independent logic supply ranging from 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 fast start-up time under 75 µs. It is housed in a compact 16-lead LFCSP package.

Feature Summary

• Dual-channel architecture with 256-position resolution and nonvolatile EEPROM storage.
• SPI-compatible serial interface with read-back capability for RDAC and EEPROM contents.
• Independent logic supply (1.8 V to 5.5 V) allows compatibility with various digital systems.
• Linear gain setting mode via INDEP pin for precise resistor matching at power-up.

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 'RL7' corresponds to the reel packaging configuration as defined by Analog Devices. Confirm that the 'B' grade indicates the specified ±8% resistor tolerance and performance characteristics. Ensure the LFCSP-16 package dimensions match the target PCB footprint requirements.

Selection Notes

Select this model for applications requiring dual-channel adjustment with persistent settings across power cycles. The 100 kΩ resistance value suits moderate impedance circuits, while the 0.43 MHz bandwidth supports AC signal processing. Verify that the system voltage range aligns with the 2.3 V to 5.5 V VDD specification and that the SPI controller supports the required clock polarity and phase settings.

Part Context

This component belongs to the AD514x family of dual-channel, 256-position digital potentiometers. It shares functional similarities with the AD5122 but offers higher resolution. The 'CPZ' designation identifies the 16-lead LFCSP package, while '100' specifies the 100 kΩ nominal resistance. The 'B' grade denotes the standard tolerance and temperature coefficient specifications.

Replacement Considerations

The AD5142BRUZ100-RL7 serves as a direct replacement if a TSSOP package is preferred over the LFCSP form factor. For single-channel applications, the AD5141 series may be considered. Ensure any substitute maintains the same 256-position resolution and nonvolatile memory capabilities.