AD5821BCBZ-REEL

Overview

The AD5821BCBZ-REEL is a single-channel, 10-bit digital-to-analog converter (DAC) featuring a 120 mA current sink output. It operates on a single 2.7 V to 5.5 V supply and includes an internal reference and ultralow noise preamplifier. The device is controlled via a 2-wire I²C-compatible serial interface with clock rates up to 400 kHz. Key specifications include ±1.5 LSB relative accuracy, guaranteed monotonicity, and a power-down mode consuming 0.5 μA typical current. It incorporates a power-on reset circuit ensuring the output powers up to 0 V.

Feature Summary

• 120 mA maximum current sink capability with integrated current sense resistor
• 10-bit resolution with ±1.5 LSB relative accuracy and guaranteed monotonicity
• I²C-compatible 2-wire serial interface operating at 400 kHz with 1.8 V logic levels
• Internal reference and ultralow noise preamplifier for precision applications

Applications

• Lens autofocus systems in camera modules
• Image stabilization actuators
• Optical zoom controls
• Shutter and iris/exposure mechanisms
• Neutral density (ND) filter controls

Procurement Notes

Verify the ordering suffix REEL indicates tape and reel packaging configuration. Confirm the B version temperature range of −40°C to +85°C matches application requirements. Ensure the 9-ball WLCSP package dimensions align with PCB layout constraints. Check for RoHS compliance status in official documentation before procurement.

Selection Notes

Select this component for applications requiring precise control of voice coil actuators with currents up to 120 mA. The 10-bit resolution and monotonicity are critical for repeatable lens positioning. Consider the 3 × 3 mm WLCSP package size for space-constrained designs like mobile phones. Verify I²C bus compatibility with the host microcontroller's voltage levels.

Part Context

The AD5821 is part of Analog Devices' line of low-power DACs designed for consumer electronics. It integrates functions typically requiring external components, such as references and amplifiers, into a compact 9-ball WLCSP. This integration simplifies design-in for camera modules and other portable devices where board space and power consumption are limiting factors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet.