AD5141BCPZ100-RL7

Overview

The AD5141BCPZ100-RL7 is a single-channel, nonvolatile digital potentiometer featuring 256 adjustable positions. It offers a 100 kΩ resistance option with an 8% maximum tolerance and a low temperature coefficient of 35 ppm/°C. 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 up to ±2.75 V. It includes EEPROM for data retention, ensuring wiper settings persist across power cycles. Packaged in a compact 16-lead, 3 mm × 3 mm LFCSP, it provides fast start-up times under 75 µs and high bandwidth suitable for precision analog signal control.

Feature Summary

• Single-channel architecture with 256-position resolution and 100 kΩ nominal resistance.
• Nonvolatile memory (EEPROM) retains wiper settings during power-off events.
• Dual-interface support: 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.

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' indicates reel packaging when sourcing components. Confirm the 'B' grade corresponds to the standard 8% resistor tolerance specifications outlined in the datasheet. Ensure the logic supply voltage (VLOGIC) aligns with the target system's digital interface requirements before integration.

Selection Notes

Select this model over the AD5121 variant when 256 positions are required instead of 128. Choose the 100 kΩ version for higher impedance applications compared to the 10 kΩ option. Verify that the 3 mm × 3 mm LFCSP package fits the PCB footprint constraints. Ensure the application does not exceed the ±1.5 mA continuous current limit for the 100 kΩ configuration.

Part Context

This component belongs to the AD512x/AD514x family of nonvolatile digital potentiometers manufactured by Analog Devices. The AD5141 specifically denotes the single-channel, 256-position variant within this series. It shares architectural similarities with quad-channel models like the AD5144 but is optimized for space-constrained single-potentiometer designs.

Replacement Considerations

The AD5141BCPZ100-RL7 can be functionally replaced by other members of the AD514x family, such as the AD5141BCPZ10-RL7, provided the 10 kΩ resistance value meets the circuit requirements. Cross-referencing pin compatibility and interface selection logic is necessary when substituting with different channel counts or resistance values.

FAQ

How is the digital interface selected between SPI and I²C?

The interface is selected using the DIS (Digital Interface Select) pin. Connecting DIS to GND enables SPI mode, while connecting it to VLOGIC enables I²C mode.

What is the maximum continuous current allowed for the 100 kΩ version?

For the 100 kΩ resistance option, the maximum continuous current for terminals A, B, and W is limited to ±1.5 mA.

Does the device retain its setting after power loss?

Yes, the AD5141 features nonvolatile EEPROM memory that stores the wiper position, allowing the device to restore the last setting upon power-up.