AD5142WBCPZ10-RL7

Overview

The AD5142WBCPZ10-RL7 is a dual-channel, nonvolatile digital potentiometer featuring 256 tap positions and an SPI interface. It offers a nominal resistance of 10 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) and includes independent logic supply control (VLOGIC: 1.8 V to 5.5 V). Key electrical parameters include a maximum wiper current of ±6 mA for the 10 kΩ variant, a bandwidth of 3 MHz, and fast start-up time under 75 µs. It operates within an extended industrial temperature range of −40°C to +125°C.

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.
• High bandwidth (3 MHz at 10 kΩ) and low total harmonic distortion suitable for AC signal processing.
• Independent logic supply (VLOGIC) allows compatibility with various digital voltage levels.

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 'WB' against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure that the required resistance value (10 kΩ) and interface protocol (SPI) align with the system design requirements before procurement.

Selection Notes

Select this component when dual-channel adjustment with persistent settings is required. The 10 kΩ option provides higher current handling (±6 mA) compared to the 100 kΩ variant. Ensure the application voltage stays within the 2.3 V to 5.5 V range and consider the 3 mm × 3 mm LFCSP package constraints for PCB layout.

Part Context

This part belongs to the AD5122/AD5142 family of dual-channel digital potentiometers. The AD5142 specifically denotes the 256-position resolution variant, distinguishing it from the AD5122 which offers 128 positions. Both share similar electrical characteristics and pinouts but differ in step count.

Replacement Considerations

For direct functional replacement, consider the AD5142BCPZ10-RL7 or AD5142ABRUZ10-RL7. Verify that the alternative part number matches the 10 kΩ resistance, SPI interface, and LFCSP/TSSOP package requirements specified in the original design.

FAQ

What is the maximum continuous current allowed for the 10 kΩ version?

The maximum continuous current for the A, B, and W terminals is ±6 mA when the nominal resistance is 10 kΩ.

How does the INDEP pin function affect the device?

When the INDEP pin is enabled, the device enters linear gain setting mode at power-up, loading each string resistor independently from its associated memory location. This state cannot be disabled by software once active.

What is the data retention period for the internal EEPROM?

The EEPROM data retention is guaranteed for 50 years at a junction temperature of 125°C, assuming an endurance of 1,000 write cycles.