EVAL-AD5821AEBZ Analog Devices Inc, EVAL-AD5821AEBZ Datasheet

EVAL-AD5821AEBZ

Manufacturer Part Number

EVAL-AD5821AEBZ

Description

Evaluation Board I.c.

Manufacturer

Analog Devices Inc

Datasheet

1.AD5821ABCBZ-REEL7.pdf (16 pages)

Specifications of EVAL-AD5821AEBZ

Number Of Dac's

Number Of Bits

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

AD5821A

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

Current sink: 120 mA

Available in 3 × 3 array WLCSP package

2-wire, (I

10-bit resolution

Integrated current sense resistor

Power supply range: 2.7 V to 5.5 V

Guaranteed monotonic over all codes

Power down to 0.5 μA typical

Internal reference

Ultralow noise preamplifier

Power-down function

Power-on reset

APPLICATIONS

Consumer

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.

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

C-compatible) 1.8 V serial interface

SDA

SCL

INTERFACE

C SERIAL

DGND

FUNCTIONAL BLOCK DIAGRAM

AD5821A

REFERENCE

OUTPUT DAC

XSHUTDOWN

CURRENT

10-BIT

Figure 1.

POWER-ON

RESET

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

Industrial

GENERAL DESCRIPTION

The AD5821A is a single, 10-bit digital-to-analog converter

(DAC) with output current sinking capability of 120 mA. 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

compatible serial interface that operates at clock rates up to

400 kHz.

The AD5821A incorporates a power-on reset circuit that

ensures 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 AD5821A is designed for autofocus, image stabilization,

and optical zoom applications in camera phones, digital still

cameras, and camcorders.

The AD5821A is also suitable for many industrial applications,

such as controlling temperature, light, and movement without

derating over temperatures ranging from −30°C to +85°C.

The I

Heater controls

Fan controls

Cooler (Peltier) controls

Solenoid controls

Valve controls

Linear actuator controls

Light controls

Current loop controls

C 7-bit address for the AD5821A is 0xC.

SENSE

DGND

3.3Ω

120 mA, Current Sinking,

AGND

SINK

10-Bit, I

AD5821A

www.analog.com

C DAC

C®-

Related parts for EVAL-AD5821AEBZ

EVAL-AD5821AEBZ Summary of contents

Page 1

FEATURES Current sink: 120 mA 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 Power supply range: 2 5.5 V Guaranteed monotonic over all codes ...

Page 2

AD5821A 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 ...

Page 3

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

Page 4

AD5821A AC SPECIFICATIONS 5.5 V, AGND = DGND = Table 2. B Version Parameter Min Typ Output Current Settling Time 250 Slew Rate 0.3 Major Code Change Glitch 0.15 Impulse 3 ...

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

AD5821A PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin Number Mnemonic A1 I SINK XSHUTDOWN B1 AGND B2 DGND B3 SDA C1 DGND SCL XSHUTDOWN 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

AD5821A 2000 1800 1600 1400 1200 1000 800 600 400 200 0 10 100 1k FREQUENCY (Hz) Figure 11. AC Power Supply Rejection Ratio (V 3.5 3.0 POSITIVE INL (V = 3.8V) POSITIVE INL (V DD 2.5 2.0 1.5 POSITIVE ...

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

AD5821A TERMINOLOGY Relative Accuracy For the DAC, relative accuracy or integral nonlinearity (INL measurement of the maximum deviation, in LSB, from a straight line passing through the endpoints of the DAC trans- fer function. A typical INL vs. ...

Page 11

THEORY OF OPERATION The AD5821A is a fully integrated, 10-bit 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 circuit diagram ...

Page 12

AD5821A 1 SCL SDA START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE 1 SCL SDA START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE Table ...

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 AD5821A output has a compliance ...

Page 14

AD5821A APPLICATIONS INFORMATION The AD5821A 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 AD5821ABCBZ-REEL7 −30°C to +85°C 1 AD5821ABCBZ-REEL −30°C to +85°C AD5821A-WAFER −40°C to +85°C AD5821AD-WAFER −40°C to +85°C 1 EVAL-AD5821AEBZ RoHS Compliant Part. 0.65 0.59 1.575 0.53 1.515 SEATING 1.455 PLANE 0.35 0.32 1.750 0.29 1 ...

Page 16

AD5821A 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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