AD5821AD-WAFER

Overview

The AD5821AD-WAFER is a single-channel, 10-bit digital-to-analog converter (DAC) featuring a 120 mA current sink output. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and includes an internal reference. 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 over all codes, and a typical power-down current of 0.5 μA. The component utilizes a 3 × 3 array Wafer Level Chip Scale Package (WLCSP).

Feature Summary

• 120 mA maximum current sink capability for driving voice coil actuators.
• 10-bit resolution with integrated reference and ultralow noise preamplifier.
• I²C-compatible 2-wire serial interface operating at clock rates up to 400 kHz.
• Guaranteed monotonic operation across all digital input codes.

Applications

• Lens autofocus systems in camera modules.
• Image stabilization mechanisms.
• Optical zoom controls.
• Industrial heater and fan controls.

Procurement Notes

Verify the specific suffix 'AD' against official Analog Devices documentation to confirm wafer-level configuration details. Confirm availability status as wafers may require specialized handling or specific manufacturing orders. Ensure compatibility with I²C bus voltage levels and check for any product change notifications affecting the B version temperature range.

Selection Notes

Select this component when a compact solution for driving voice coil motors is required. Ensure the application supply voltage falls within the 2.7 V to 5.5 V range. Verify that the PCB layout allows for separate analog and digital ground connections to minimize noise. Consider the compliance voltage requirements based on the target sink current and load resistance.

Part Context

The AD5821A series is designed primarily for consumer electronics requiring precise current control. The AD5821AD-WAFER variant indicates a wafer-level package format. This part belongs to a family of DACs optimized for low-power, space-constrained applications such as mobile devices and digital cameras where high integration and small footprint are critical.

Replacement Considerations

Consult Analog Devices parametric search tools for comparable parts with similar current sinking capabilities and I²C interfaces. Verify pinout compatibility if substituting in existing designs. Check for updated revisions or alternative packages if the WLCSP form factor is no longer suitable for the assembly process.