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參數資料
| 型號： | EVAL-AD5821EBZ1 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 120 mA, Current Sinking, 10-Bit, I2C DAC |
| 中文描述： | 120毫安，灌電流，10位和I2C數模轉換器 |
| 文件頁數： | 1/16頁 |
| 文件大?。?/td> | 386K |
| 代理商： | EVAL-AD5821EBZ1 |
120 mA, Current Sinking,
10-Bit, I
2
C
DAC
AD5821
FEATURES
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
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
120 mA current sink
Available in 3 × 3 array WLCSP package
2-wire (I
2
C-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 (I
2
C-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 I
2
C address for the AD5821 is 0x18.
FUNCTIONAL BLOCK DIAGRAM
R
SENSE
R
AD5821
D1
10-BIT
CURRENT
OUTPUT DAC
0
SDA
AGND
XSHUTDOWN
V
DD
DGND
SCL
I
SINK
DGND
V
DD
I
2
C SERIAL
INTERFACE
REFERENCE
POWER-ON
RESET
Figure 1.
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