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AD9944 の電気的特性と機能

AD9944のメーカーはAnalog Devicesです、この部品の機能は「CCD Signal Processors」です。


製品の詳細 ( Datasheet PDF )

部品番号 AD9944
部品説明 CCD Signal Processors
メーカ Analog Devices
ロゴ Analog Devices ロゴ 




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AD9944 Datasheet, AD9944 PDF,ピン配置, 機能
Data Sheet
Complete 10-Bit and 12-Bit, 25 MHz
CCD Signal Processors
AD9943/AD9944
FEATURES
25 MSPS correlated double sampler (CDS)
6 dB to 40 dB 10-bit variable gain amplifier (VGA)
Low noise optical black clamp circuit
Preblanking function
10-bit (AD9943), 12-bit (AD9944) 25 MSPS A/D converter
No missing codes guaranteed
3-wire serial digital interface
3 V single-supply operation
Space-saving 32-lead 5 mm × 5 mm LFCSP package
APPLICATIONS
Digital still cameras
Digital video camcorders
PC cameras
Portable CCD imaging devices
CCTV cameras
GENERAL DESCRIPTION
The AD9943/AD9944 are complete analog signal processors
for CCD applications. They feature a 25 MHz single-channel
architecture designed to sample and condition the outputs of
interlaced and progressive scan area CCD arrays. The signal
chain for the AD9943/AD9944 consists of a correlated double
sampler (CDS), a digitally controlled variable gain amplifier
(VGA), and a black level clamp. The AD9943 offers 10-bit
ADC resolution, while the AD9944 contains a true 12-bit ADC.
The internal registers are programmed through a 3-wire
serial digital interface. Programmable features include gain
adjustment, black level adjustment, input clock polarity, and
power-down modes. The AD9943/AD9944 operate from a
single 3 V power supply, typically dissipate 79 mW, and are
packaged in space-saving 32-lead LFCSP packages.
FUNCTIONAL BLOCK DIAGRAM
REFT REFB
PBLK
AD9943/AD9944
CCDIN
CDS
6dB–40dB
VGA
BAND GAP
REFERENCE
10-/12-BIT
ADC
10/12
DRVDD
DRVSS
DOUT
AVDD
AVSS
10
CONTROL
REGISTERS
DIGITAL
INTERFACE
CLP
CLPOB
INTERNAL
TIMING
DVDD
DVSS
SL SCK SDATA
SHP SHD DATACLK
Figure 1. Functional Block Diagram
Rev. C
Document Feedback
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 ©2004–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

1 Page





AD9944 pdf, ピン配列
Data Sheet
SPECIFICATIONS
GENERAL SPECIFICATIONS
TMIN to TMAX, AVDD = DVDD = DRVDD = 3 V, fSAMP = 25 MHz, unless otherwise noted.
Table 1.
Parameter
TEMPERATURE RANGE
Operating
Storage
POWER SUPPLY VOLTAGE
Analog, Digital, Digital Driver
POWER CONSUMPTION
Normal Operation
Power-Down Mode
MAXIMUM CLOCK RATE
Min Typ
−20
−65
2.7
79
150
25
AD9943/AD9944
Max
+85
+150
3.6
Unit
°C
°C
V
mW
µW
MHz
DIGITAL SPECIFICATIONS
DRVDD = DVDD = 2.7 V, CL = 20 pF, unless otherwise noted.
Parameter
LOGIC INPUTS
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
Input Capacitance
LOGIC OUTPUTS
High Level Output Voltage, IOH = 2 mA
Low Level Output Voltage, IOL = 2 mA
Symbol
VIH
VIL
IIH
IIL
CIN
VOH
VOL
Min Typ Max Unit
2.1
0.6
10
10
10
V
V
µA
µA
pF
2.2 V
0.5 V
AD9943 SYSTEM SPECIFICATIONS
TMIN to TMAX, AVDD = DVDD = DRVDD = 3 V, fSAMP = 25 MHz, unless otherwise noted.
Table 2.
Parameter
CDS
Maximum Input Range before Saturation1
Allowable CCD Reset Transient1
Maximum CCD Black Pixel Amplitude1
VARIABLE GAIN AMPLIFIER (VGA)
Gain Control Resolution
Gain Monotonicity
Gain Range
Minimum Gain
Maximum Gain
Min Typ
1.0
500
100
1024
Guaranteed
5.3
40 41.5
Max Unit
V p-p
mV
mV
Steps
dB
dB
BLACK LEVEL CLAMP
Clamp Level Resolution
Clamp Level
Minimum Clamp Level
Maximum Clamp Level
256
0
63.75
Steps
LSB
LSB
Conditions
See input waveform in footnote.
See Figure 13 for VGA gain curve.
See Variable Gain Amplifier section for VGA
gain equation.
Measured at ADC output.
Rev. C | Page 3 of 20


3Pages


AD9944 電子部品, 半導体
AD9943/AD9944
ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter (With Respect To)
AVDD (AVSS)
DVDD (DVSS)
DRVDD (DRVSS)
Digital Outputs (DRVSS)
SHP, SHD, DATACLK (DVSS)
CLPOB, PBLK (DVSS)
SCK, SL, SDATA DVSS (AVSS)
REFT, REFB, CCDIN
Junction Temperature
Lead Temperature (10 sec)
Min
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
Max
+3.9
+3.9
+3.9
DRVDD + 0.3
DVDD + 0.3
DVDD + 0.3
DVDD + 0.3
AVDD + 0.3
150
300
Unit
V
V
V
V
V
V
V
V
°C
°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Data Sheet
THERMAL RESISTANCE
The thermal resistance of a 32-lead LFCSP package
(with the exposed bottom pad soldered to the board GND)
is θJA = 27.7°C/W.
ESD CAUTION
Rev. C | Page 6 of 20

6 Page



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共有リンク

Link :


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AD9943

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