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AD5823 の電気的特性と機能

AD5823のメーカーはAnalog Devicesです、この部品の機能は「10-Bit VCM Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 AD5823
部品説明 10-Bit VCM Driver
メーカ Analog Devices
ロゴ Analog Devices ロゴ 




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AD5823 Datasheet, AD5823 PDF,ピン配置, 機能
ADI Confidential
10-Bit VCM Driver for Autofocus
AD5823/AD5823-1
FEATURES
10-bit VCM driver for autofocus
ARC and ESRC enabled for fast autofocus capture
Available in 2 × 3 array, 1.1 mm2 WLCSP
2-wire (I2C-compatible), 1.8 V serial interface
10-bit resolution DAC
100 mA output current sink
Integrated current sense resistor
2.3 V to 3.6 V power supply
Guaranteed monotonic over all codes
Power-down to 5 µA maximum
Internal reference
Ultralow noise preamplifier
Power-on reset
APPLICATIONS
Camera phones
Camera/image modules
Lens autofocus
Shutter/NDF/iris control
Camera enabled PDA
Web cameras
GENERAL DESCRIPTION
The AD58231 and AD5823-1 are single, 10-bit DACs with 100 mA
output current sink capability and integrated Actuator Response
Control™ (ARC™) technology. ARC is a revolutionary autofocus
capture time and image quality enhancing technology developed by
Analog Devices, Inc., and integrated into the AD5823/AD5823-1
VCM drivers.
ARC circuitry applies specialized, patented waveform and appli-
cation technology to underdamped voice coil motors (VCMs)
to reduce mechanical ringing. This technology enables the user
to achieve very fast mechanical settling times and, as a result,
greatly enhances autofocus capture times, image quality, and
user experience.
The AD5823/AD5823-1 feature an internal reference and
operate from a single 2.3 V to 3.6 V supply. The DAC is
controlled via a 2-wire (I2C-compatible) serial interface that
operates at clock rates up to 400 kHz. The 7-bit I2C address
for the AD5823/AD5823-1 is 0xC.
FUNCTIONAL BLOCK DIAGRAM
VDD
SDA
SCL
SHUTDOWN
REFERENCE
POR
10-BIT
DAC
ARC
MCLK
DIGITAL
INTERFACE
RSENSE
0.5
D1
ISINK
Figure 1.
GND
The AD5823/AD5823-1 also incorporate a power-on reset
circuit, which ensures that the DAC output powers up to 0 V
and remains at 0 V until a valid write takes place. To ensure that
minimal power is consumed in shutdown mode, the user can
select the power-down polarity: the AD5823 SHUTDOWN pin
is active low; the AD5823-1 SHUTDOWN pin is active high.
The AD5823/AD5823-1 were designed for autofocus applica-
tions in camera modules, camera phones, digital still cameras,
and camcorders.
The AD5823/AD5823-1 have many industrial applications, such
as controlling temperature, light, and movement over the
temperature range of −40°C to +85°C without derating.
1 Protected by U.S. Patent 5,969,657; other patents pending.
Rev. Sp0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesfor itsuse, norfor any infringementsof patentsorother
rightsofthirdpartiesthatmayresultfrom itsuse.Specificationssubjecttochange withoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks are the property of their respectiveowners.
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
©2010 Analog Devices, Inc. All rights reserved.

1 Page





AD5823 pdf, ピン配列
ADI Confidential
AD5823/AD5823-1
SPECIFICATIONS
VDD = 2.3 V to 3.6 V, TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
DC PERFORMANCE, VCM DRIVER STAGE
Resolution
Relative Accuracy
Differential Nonlinearity1
Code 0 Error2
Code 16 Error
Code 16 Error Drift3
Full-Scale Error
Full-Scale Error Drift3
OUTPUT CHARACTERISTICS,
VCM DRIVER STAGE
Maximum Output Current
Output Current During Power-Down
Output Compliance
Min
0.17
Typ
10
±1.5
0
±0.5
±1
100
80
Power-Up Time3
AD5823
100
AD5823-1
100
INTERNAL CLOCK
Clock Frequency
20
Clock Accuracy
±1
DIGITAL INPUTS, SHUTDOWN
Input High Voltage, VIH
1.26 1.8
Input Low Voltage, VIL
0
Input Current
I2C INTERFACE
SDA, SCL Input High Voltage, VIH 1.26 1.8
SDA, SCL Input Low Voltage, VIL
0
Glitch Rejection
Input Leakage Current
SDA (Open-Drain Output)3
Output Low Voltage, VOL
POWER SUPPLY
VDD Pin
Quiescent Current
AD5823
AD5823-1
Shutdown Current
AD5823
AD5823-1
2.3
0.78
0.78
0.25
0.25
1 Linearity is tested using a reduced code range: Code 32 to Code 992.
2 To achieve near zero output current, use the power-down feature.
3 Guaranteed by characterization and design; not production tested.
Max
±4
±1
0.0025
±3.5
±0.08
±5
±0.33
Unit Test Conditions/Comments
Bits
LSB
LSB
LSB
LSB
LSB/°C
LSB
LSB/°C
97.65 µA/LSB
Guaranteed monotonic over all codes
All 0s loaded to DAC
TA = 25°C
TA = 25°C
mA
nA
VDD V
µs
µs
MHz
±2.5 %
3.6 V
0.54 V
±1 µA
3.6 V
0.54 V
50 ns
±1 µA
0.4
0.2 × VDD
V
V
3.6 V
2.2 mA
2.2 mA
5 µA
5 µA
SHUTDOWN = 0 V
Output voltage range over which maximum
sink current is available
Time to exit power-down mode, VDD = 3.6 V
ISINK = 3 mA, bus supply > 2 V
ISINK = 3 mA, bus supply < 2 V
SHUTDOWN pin high, VCM inactive
SHUTDOWN pin low, VCM inactive
SHUTDOWN pin low
SHUTDOWN pin high
Rev. Sp0 | Page 3 of 22


3Pages


AD5823 電子部品, 半導体
AD5823/AD5823-1
ADI Confidential
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
BALL A1
INDICATOR
1
2
ISINK A SHUTDOWN
GND B SDA
VDD C SCL
AD5823/AD5823-1
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
Figure 3. Pin Configuration
Table 6. Pin Function Descriptions
Pin No.
Mnemonic
Description
A1 ISINK Output Current Sink.
A2 SHUTDOWN Asynchronous Power-Down Signal. Active low for the AD5823; active high for the AD5823-1.
B1 GND Analog Ground Pin.
B2 SDA
I2C Interface Signal.
C1 VDD
Supply Voltage.
C2 SCL
I2C Interface Signal.
Rev. Sp0 | Page 6 of 22

6 Page



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