AD5821BCBZ-REEL7

Overview

The AD5821BCBZ-REEL7 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 guaranteed monotonicity over all codes, a typical power-down current of 0.5 μA, and a power-on reset function ensuring the output powers up to 0 V. The component is housed in a 9-ball WLCSP package.

Feature Summary

• 120 mA maximum current sink capability with integrated current sense resistor
• 10-bit resolution with ±1 LSB DNL guarantee for monotonic operation
• I²C-compatible 2-wire serial interface operating at 400 kHz
• Internal reference and ultralow noise preamplifier

Applications

• Lens autofocus systems
• Image stabilization actuators
• Optical zoom controls
• Camera module lens covers
• Industrial heater and fan controls

Procurement Notes

Verify the ordering suffix REEL7 corresponds to tape and reel packaging when sourcing. Confirm the B version temperature range of −40°C to +85°C matches application requirements. Ensure the I²C address 0x18 is compatible with the system bus configuration. Check that the 9-ball WLCSP footprint aligns with PCB design constraints.

Selection Notes

Select this DAC for applications requiring precise control of voice coil motors or linear actuators. The 120 mA sink capacity supports most commercial camera modules. Verify that the 2.7 V minimum supply voltage suits the system power architecture. Consider the compliance voltage limits (600 mV at 120 mA) when designing the ground return path and load resistance.

Part Context

The AD5821 is part of Analog Devices' low-power DAC portfolio designed for portable consumer electronics. It integrates functions typically requiring external components, such as references and amplifiers, into a compact WLCSP package. This integration reduces board space and simplifies design-in for mobile devices like camera phones and camcorders.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternatives based on matching 10-bit resolution, 120 mA sink current, I²C interface compatibility, and WLCSP package dimensions.