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Analog Devices Semiconductor Electronic Components Datasheet

AD5398 Datasheet

I2C DAC

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AD5398 pdf
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FEATURES
120 mA current sink
Available in 8-lead LFCSP package
2-wire (I2C®-compatible) 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 filter NDFs
Lens covers
Camera phones
Digital still cameras
Camera modules
Digital video cameras (DVCs)/camcorders
Camera-enabled devices
Security cameras
Web/PC cameras
INDUSTRIAL APPLICATIONS
Heater control
Fan control
Cooler (Peltier) control
Solenoid control
Valve control
Linear actuator control
Light control
Current loop control
120 mA, Current Sinking, 10-Bit, I2C DAC
AD5398
FUNCTIONAL BLOCK DIAGRAM
VDD
6
AD5398
REFERENCE
POWER-ON
RESET
SDA 3
SCL 4
I2C SERIAL
INTERFACE
10-BIT
CURRENT
OUTPUT DAC
PD 1
5
DGND
R
2
DGND
Figure 1.
8 ISINK
RSENSE
3.3Ω
7
AGND
GENERAL DESCRIPTION
The AD5398 is a single 10-bit DAC 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 AD5398 incorporates a power-on reset circuit, which
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 max.
The AD5398 is designed for autofocus, image stabilization,
and optical zoom applications in camera phones, digital still
cameras, and camcorders.
The AD5398 also has many industrial applications, such as
controlling temperature, light, and movement, over the range
40°C to +85°C without derating.
The I2C address range for the AD5398 is 0x18 to 0x1F
inclusive.
Rev. A
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.
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
© 2005 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

AD5398 Datasheet

I2C DAC

No Preview Available !

AD5398 pdf
AD5398
TABLE OF CONTENTS
Specifications..................................................................................... 3
AC Specifications.......................................................................... 4
Timing Specifications .................................................................. 4
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Typical Performance Characteristics ............................................. 7
Terminology ...................................................................................... 9
REVISION HISTORY
7/05—Rev. 0 to Rev. A
Changes to Table 4............................................................................ 5
Deleted Figure 21............................................................................ 13
Updated Outline Dimensions ....................................................... 14
Changes to Ordering Guide .......................................................... 14
12/04—Revision 0: Initial Version
Theory of Operation ...................................................................... 10
Serial Interface ............................................................................ 10
I2C Bus Operation ...................................................................... 10
Data Format ................................................................................ 10
Power Supply Bypassing and Grounding................................ 11
Applications..................................................................................... 13
Outline Dimensions ....................................................................... 14
Ordering Guide .......................................................................... 14
Rev. A | Page 2 of 16


Part Number AD5398
Description I2C DAC
Maker Analog Devices
Total Page 16 Pages
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