EVAL-AD5821EBZ Analog Devices Inc, EVAL-AD5821EBZ Datasheet

BOARD EVALUATION FOR AD5821

EVAL-AD5821EBZ

Manufacturer Part Number
EVAL-AD5821EBZ
Description
BOARD EVALUATION FOR AD5821
Manufacturer
Analog Devices Inc
Datasheet

Specifications of EVAL-AD5821EBZ

Number Of Dac's
1
Number Of Bits
10
Outputs And Type
1, Single Ended
Sampling Rate (per Second)
400k
Data Interface
I²C
Settling Time
250µs
Dac Type
Current
Voltage Supply Source
Single
Operating Temperature
-30°C ~ 80°C
Utilized Ic / Part
AD5821
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
120 mA current sink
Available in 3 × 3 array WLCSP package
2-wire (I
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
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.
2
C-compatible) 1.8 V serial interface
SDA
SCL
INTERFACE
I
2
C SERIAL
DGND
FUNCTIONAL BLOCK DIAGRAM
AD5821
REFERENCE
OUTPUT DAC
XSHUTDOWN
CURRENT
10-BIT
Figure 1.
POWER-ON
RESET
R
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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
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
V
DD
2
C address for the AD5821 is 0x18.
R
SENSE
DGND
3.3Ω
AGND
120 mA, Current Sinking,
D1
V
DD
I
SINK
©2007 Analog Devices, Inc. All rights reserved.
10-Bit, I
2
C-compatible) serial
2
AD5821
www.analog.com
C
®
DAC

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EVAL-AD5821EBZ Summary of contents

Page 1

FEATURES 120 mA current sink Available in 3 × 3 array WLCSP package 2 2-wire (I C-compatible) 1.8 V serial interface 10-bit resolution Integrated current sense resistor 2 5.5 V power supply Guaranteed monotonic over all codes Power-down ...

Page 2

AD5821 TABLE OF CONTENTS Features .............................................................................................. 1 Consumer Applications ................................................................... 1 Industrial Applications .................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 AC Specifications.......................................................................... 4 Timing Specifications .................................................................. 4 Absolute Maximum Ratings............................................................ ...

Page 3

SPECIFICATIONS 5.5 V, AGND = DGND = 0 V, load resistance R DD unless otherwise noted. Table 1. Parameter DC PERFORMANCE Resolution 2 Relative Accuracy 2, 3 Differential Nonlinearity Zero-Code Error Offset ...

Page 4

AD5821 AC SPECIFICATIONS 5.5 V, AGND = DGND = 0 V, load resistance R DD Table 2. B Version Parameter Min Output Current Settling Time Slew Rate Major Code Change Glitch Impulse 3 Digital Feedthrough ...

Page 5

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to AGND DGND DD AGND to DGND SCL, SDA to DGND XSHUTDOWN to DGND I to AGND SINK Operating Temperature Range Industrial (B ...

Page 6

AD5821 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. 9-Ball WLCSP Pin Function Description Ball Number Mnemonic A1 I SINK XSHUTDOWN B1 AGND B2 DGND B3 SDA C1 DGND SCL 1690µ ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 2.0 1.5 1.0 0.5 0 –0.5 CODE Figure 5. Typical INL vs. Code Plot 0.6 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 CODE Figure 6. Typical DNL vs. Code Plot 92.0 91.5 91.0 90.5 90.0 ...

Page 8

AD5821 2000 1800 1600 1400 1200 1000 800 600 400 200 0 10 100 1k FREQUENCY Figure 11. AC Power Supply Rejection (V 3.5 3.0 POSITIVE INL (V = 3.8V) POSITIVE INL (V DD 2.5 2.0 1.5 POSITIVE INL (V ...

Page 9

4.5V DD 0 2.7V 0.6 DD 0.5 0.4 –50 –30 – TEMPERATURE (°C) Figure 17. SCL and SDA ...

Page 10

AD5821 TERMINOLOGY Relative Accuracy For the DAC, relative accuracy or integral nonlinearity is a measurement of the maximum deviation, in LSB, from a straight line passing through the endpoints of the DAC transfer function. A typical INL vs. code plot ...

Page 11

THEORY OF OPERATION The AD5821 is a fully integrated, 10-bit digital-to-analog converter (DAC) with 120 mA output current sink capability intended for driving voice coil actuators in applications such as lens autofocus, image stabilization, and optical zoom. The ...

Page 12

AD5821 1 SCL SDA START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE 1 SCL SDA START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE 1 ...

Page 13

When sinking the maximum current of 120 mA, the maximum voltage drop allowed across R is 400 mV, and the minimum SENSE drain to source voltage 200 mV. This means that the AD5821 output has a compliance ...

Page 14

AD5821 APPLICATIONS INFORMATION The AD5821 is designed to drive both spring-preloaded and nonspring linear motors used in applications such as lens auto- focus, image stabilization, or optical zoom. The operation principle of the spring-preloaded motor is that the lens position ...

Page 15

... ORDERING GUIDE Model Temperature Range 1 AD5821BCBZ-REEL7 −40°C to +85°C AD5821BCBZ-REEL 1 −40°C to +85°C AD5821-WAFER −40°C to +85°C AD5821D-WAFER −40°C to +85°C 1 EVAL-AD5821EBZ Pb-free part. 0.65 0.59 0.53 SEATING PLANE 0.36 0.32 1.750 0.28 1.690 1.630 0.50 BSC BALL PITCH 0 ...

Page 16

AD5821 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, ...

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