120 mA, Current Sinking, 2 10-Bit, I C DAC AD5821A FEATURES Industrial Heater controls Current sink: 120 mA Fan controls Available in 3 3 array WLCSP package 2 Cooler (Peltier) controls 2-wire, (I C-compatible) 1.8 V serial interface Solenoid controls 10-bit resolution Valve controls Integrated current sense resistor Linear actuator controls Power supply range: 2.7 V to 5.5 V Light controls Guaranteed monotonic over all codes Current loop controls Power down to 0.5 A typical Internal reference GENERAL DESCRIPTION Ultralow noise preamplifier Power-down function The AD5821A is a single, 10-bit digital-to-analog converter Power-on reset (DAC) with output current sinking capability of 120 mA. It features an internal reference and operates from a single 2.7 V 2 APPLICATIONS to 5.5 V supply. The DAC is controlled via a 2-wire, I C- compatible serial interface that operates at clock rates up to Consumer 400 kHz. Lens autofocus Image stabilization The AD5821A incorporates a power-on reset circuit that Optical zoom ensures the DAC output powers up to 0 V and remains there until Shutters a valid write takes place. It has a power-down feature that reduces Iris/exposure the current consumption of the device to 1 A maximum. Neutral density (ND) filters The AD5821A is designed for autofocus, image stabilization, Lens covers and optical zoom applications in camera phones, digital still Camera phones cameras, and camcorders. Digital still cameras The AD5821A is also suitable for many industrial applications, Camera modules such as controlling temperature, light, and movement without Digital video cameras/camcorders derating over temperatures ranging from 30C to +85C. Camera-enabled devices 2 Security cameras The I C 7-bit address for the AD5821A is 0xC. Web/PC cameras FUNCTIONAL BLOCK DIAGRAM XSHUTDOWN V DGND DD REFERENCE POWER-ON V DD RESET SDA D1 10-BIT 2 I C SERIAL I CURRENT SINK SCL INTERFACE OUTPUT DAC R SENSE R 3.3 AD5821A DGND AGND Figure 1. Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 07796-001AD5821A TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Consumer Applications ................................................................... 1 Terminology .................................................................................... 10 Industrial Applications .................................................................... 1 Theory of Operation ...................................................................... 11 General Description ......................................................................... 1 Serial Interface ............................................................................ 11 2 Functional Block Diagram .............................................................. 1 I C Bus Operation ...................................................................... 11 Revision History ............................................................................... 2 Data Format ................................................................................ 11 Specif icat ions ..................................................................................... 3 Power Supply Bypassing and Grounding ................................ 12 AC Specifications .......................................................................... 4 Applications Information .............................................................. 14 Timing Specifications .................................................................. 4 Outline Dimensions ....................................................................... 15 Absolute Maximum Ratings ............................................................ 5 Ordering Guide .......................................................................... 15 Pin Configuration and Function Descriptions ............................. 6 REVISION HISTORY 10/08Revision 0: Initial Version Rev. 0 Page 2 of 16