AD5245BRJZ50-R2

Digital Potentiometers Overview

The AD5245BRJZ50-R2 is an 8-bit, I2C-compatible digital potentiometer from Analog Devices. It features a single rheostat with 256 tap positions and a nominal end-to-end resistance of 50 kΩ. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a typical supply current of 8 µA. It utilizes a compact SOT-23-8 package measuring 2.9 mm × 3 mm. Key electrical characteristics include a resistance temperature coefficient of 45 ppm/°C, a maximum wiper resistance of 120 Ω, and a power-on preset to midscale. The component supports full read/write access to the wiper register via the serial interface.

Digital Potentiometers Feature Summary

• 256-position adjustment with 50 kΩ nominal end-to-end resistance
• I2C-compatible 2-wire serial interface with programmable address bit AD0
• Compact SOT-23-8 (2.9 mm × 3 mm) surface-mount package
• Single supply operation: 2.7 V to 5.5 V with low power consumption (8 µA typ)

Digital Potentiometers Applications

• Mechanical potentiometer replacement in new designs
• LCD panel VCOM adjustment
• Transducer adjustment for pressure, temperature, position, chemical, and optical sensors
• RF amplifier biasing

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details and revision status. Ensure compatibility with the target I2C bus addressing scheme, as the AD0 pin allows for two devices on the same bus. Confirm that the 50 kΩ resistance value aligns with the circuit requirements regarding bandwidth and current handling capabilities.

Digital Potentiometers Selection Notes

Select this component when a compact, solid-state alternative to mechanical potentiometers is required for 256-level resolution. The 50 kΩ resistance value offers a balance between bandwidth and noise performance compared to lower or higher resistance variants. Ensure the application environment stays within the specified operating temperature range of –40°C to +125°C and that the supply voltage remains within the 2.7 V to 5.5 V limits.

Digital Potentiometers Part Context

The AD5245 belongs to the AD524x family of 256-position digital potentiometers. Variants within this series differ primarily by their nominal end-to-end resistance values, which are available in 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ options. All variants share the same functional architecture, package type, and digital interface specifications, allowing for design flexibility based on impedance requirements.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include AD5245BRJ10 (10 kΩ), AD5245BRJ5 (5 kΩ), and AD5245BRJ100 (100 kΩ). These parts maintain identical pinouts and functionality but differ in resistance values. Verify that the system can accommodate the change in resistance without affecting signal integrity or power dissipation limits.