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參數資料
| 型號： | AD5821BCBZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/17頁 |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT CURRENTSINK 9WLCSP |
| 產品培訓模塊： | Data Converter Fundamentals DAC Architectures |
| 產品變化通告： | AD5821 Obsolescence 06/Jan/2012 |
| 標準包裝： | 1 |
| 設置時間： | 250µs |
| 位數： | 10 |
| 數據接口： | 串行 |
| 轉換器數目： | 1 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 20mW |
| 工作溫度： | -30°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 9-UFBGA，WLCSP |
| 供應商設備封裝： | 9-WLCSP（1.52 x 1.69） |
| 包裝： | 標準包裝 |
| 輸出數目和類型： | 1 電流，單極 |
| 采樣率（每秒）： | * |
| 產品目錄頁面： | 784 (CN2011-ZH PDF) |
| 配用： | EVAL-AD5821EBZ-ND - BOARD EVALUATION FOR AD5821 |
| 其它名稱： | AD5821BCBZ-REEL7DKR |
120 mA, Current Sinking,
10-Bit, I2C DAC
AD5821
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
FEATURES
120 mA current sink
Available in 3 × 3 array WLCSP package
2-wire (I2C-compatible) 1.8 V serial interface
10-bit resolution
Integrated current sense resistor
2.7 V to 5.5 V power supply
Guaranteed monotonic over all codes
Power-down to 0.5 μA typical
Internal reference
Ultralow noise preamplifier
Power-down function
Power-on reset
CONSUMER APPLICATIONS
Lens autofocus
Image stabilization
Optical zoom
Shutters
Iris/exposure
Neutral density (ND) filters
Lens covers
Camera phones
Digital still cameras
Camera modules
Digital video cameras/camcorders
Camera-enabled devices
Security cameras
Web/PC cameras
INDUSTRIAL APPLICATIONS
Heater controls
Fan controls
Cooler (Peltier) controls
Solenoid controls
Valve controls
Linear actuator controls
Light controls
Current loop controls
GENERAL DESCRIPTION
The AD5821 is a single 10-bit digital-to-analog converter with
120 mA output current sink capability. 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 AD5821 incorporates a power-on reset circuit that ensures
that 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 AD5821 is designed for autofocus, image stabilization, and
optical zoom applications in camera phones, digital still cameras,
and camcorders.
The AD5821 also has many industrial applications, such as
controlling temperature, light, and movement, over the range of
40°C to +85°C without derating.
The I2C address for the AD5821 is 0x18.
FUNCTIONAL BLOCK DIAGRAM
RSENSE
3.3
R
AD5821
D1
10-BIT
CURRENT
OUTPUT DAC
05
95
0-
0
01
SDA
AGND
XSHUTDOWN
VDD
DGND
SCL
ISINK
DGND
VDD
I2C SERIAL
INTERFACE
REFERENCE
POWER-ON
RESET
Figure 1.
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