AD5254BRU100-RL7

Digital Potentiometers Overview

The AD5254BRU100-RL7 is a quad-channel, I2C-compatible digital potentiometer with 256-position resolution (8 bits). It features nonvolatile memory (EEMEM) to store wiper settings and resistance tolerance data. The device operates on a single supply of 2.7 V to 5.5 V or dual supplies of ±2.25 V to ±2.75 V. It offers a nominal resistance of 100 kΩ with a bandwidth of 40 kHz at midscale. Key dynamic parameters include a settling time of 14 µs and total harmonic distortion of 0.05%. The part supports synchronous/asynchronous updates, increment/decrement commands, and ±6 dB step changes.

Digital Potentiometers Feature Summary

• Quad-channel architecture with 256-step (8-bit) resolution per channel
• Nonvolatile EEMEM stores wiper positions and absolute resistance tolerance values
• I2C interface with two slave address bits allowing four devices on one bus
• Programmable rheostat/potentiometer modes with linear and ±6 dB adjustment commands

Digital Potentiometers Applications

• RGB LED backlight control for LCD panels
• White LED brightness adjustment
• RF base station power amplifier bias control
• Programmable gain and offset control circuits
• Sensor calibration systems

Digital Potentiometers Procurement Notes

Verify the ordering suffix -RL7 indicates tape and reel packaging when sourcing. Confirm the BRU package type corresponds to TSSOP-20. Ensure the 100 kΩ resistance value matches the specific variant required for the circuit design. Check that the operating temperature range of –40°C to +105°C meets system environmental specifications.

Digital Potentiometers Selection Notes

Select this model over the AD5253 if 256-position resolution is required instead of 64 positions. Choose the 100 kΩ variant for higher impedance applications where lower current consumption is prioritized over bandwidth. Verify that the I2C clock frequency requirements do not exceed 400 kHz. Ensure the host controller can handle the acknowledge polling during EEMEM write cycles which take approximately 26 ms.

Digital Potentiometers Part Context

This component belongs to the AD5253/AD5254 family of quad digital potentiometers. The AD5254 specifically provides 256 positions compared to the AD5253's 64 positions. The RU suffix denotes the TSSOP-20 package, while the 100 indicates the 100 kΩ nominal resistance. The RL7 suffix specifies the reel packaging format used for automated assembly.

Digital Potentiometers Replacement Considerations

The AD5253BRU100-RL7 is a compatible substitute if 64-position resolution is sufficient. Other Analog Devices quad digital potentiometers may require pinout or software command set verification. Direct replacement requires matching the 100 kΩ resistance value and TSSOP-20 package dimensions.