AD5821A

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120 mA, Current Sinking, 10-Bit, I2C DAC

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Overview

  • Current sink: 120 mA
  • Available in 3 × 3 array WLCSP package
  • 2-wire, (I2C-compatible) 1.8 V serial interface
  • 10-bit resolution
  • Integrated current sense resistor
  • Power supply range: 2.7 V to 5.5 V
  • Guaranteed monotonic over all codes
  • Power down to 0.5 μA typical
  • Internal reference
  • Ultralow noise preamplifier
  • Power-down function
  • Power-on reset

The AD5821A is a single, 10-bit digital-to-analog converter (DAC) with output current sinking capability of 120 mA. It features an internal reference and operates from a single 2.7 V to 5.5 V supply. The DAC is controlled via a 2-wire, I2C®-compatible serial interface that operates at clock rates up to 400 kHz.

The AD5821A incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V and remains there until a valid write takes place. It has a power-down feature that reduces the current consumption of the device to 1 μA maximum.
The AD5821A is designed for autofocus, image stabilization, and optical zoom applications in camera phones, digital still cameras, and camcorders.

The AD5821A is also suitable for many industrial applications, such as controlling temperature, light, and movement without derating over temperatures ranging from −30°C to +85°C.
The I2C 7-bit address for the AD5821A is 0xC.

AD5821A
120 mA, Current Sinking, 10-Bit, I2C DAC
AD5821A-fbl AD5821A-pc
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Evaluation Kits

eval board
EVAL-AD5821A

AD5821A Evaluation Board

Product Details

The EVAL-AD5821AKTZ Evaluation Kit is designed to allow the user to evaluate the performance of the AD5821A Auto Focus (AF) driver. This user guide describes how to download and use the AD5821A Evaluation Software which is available for Windows and allows the user to easily program the AD5821A and check the basic functionality of the part.

The EVAL-AD5821A Evaluation Kit contains the following boards:

  • EVAL-AD5821A-DBZ: A board that includes the AD5821A device and Voice Coil Motor (VCM) loads. It also includes connectors for external VCM loads and a connector for external I2C
  • EVAL-APOLLO-LD-MBZ: Contains several LDOs to generate the AD5821A supplies and other voltages necessary to the system, connectors for external supplies, level shifters, current sense amplifiers and an ADC to measure voltages and currents
  • APOLLO-CORTEX-M3: Apollo controller board
  • USB Standard Micro-B-cable that connects the boards to the computer

EVAL-AD5821A
AD5821A Evaluation Board
EVAL-AD5821AKTZ Kit Evaluation Board EVAL-AD5821AKTZ Kit Evaluation Board - Top View EVAL-AD5821AKTZ Kit Evaluation Board - Bottom View

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