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參數(shù)資料
| 型號： | DEM-VSP2232Y |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | CCD SIGNAL PROCESSOR FOR DIGITAL CAMERAS |
| 中文描述： | CCD信號處理器的數(shù)碼相機 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大小： | 248K |
| 代理商： | DEM-VSP2232Y |
VSP2232
SLAS320 – MAY 2001
CCD SIGNAL PROCESSOR
FOR DIGITAL CAMERAS
1
www.ti.com
FEATURES
CCD Signal Processing
– Correlated Double Sampling (CDS)
– Programmable Black Level Clamping
Programmable Gain Amplifier (PGA)
– –6-dB to 42-dB Gain Ranging
10-Bit Digital Data Output
– Up to 36-MHz Conversion Rate
– No Missing Codes
76-dB Signal-to-Noise Ratio
Portable Operation
– Low Voltage: 2.7 V to 3.6 V
– Low Power: 130 mW (typ) at 3.0 V
– Standby Mode: 6 mW
DESCRIPTION
The VSP2232 is a complete mixed-signal processing IC
for digital cameras that provides signal conditioning and
analog-to-digital conversion for the output of a CCD
array. The primary CCD channel provides correlated
double sampling (CDS) to extract the video information
from the pixels, a –6-dB to 42-dB gain with digital control
for varying illumination conditions, and black level
clamping for an accurate black level reference.
Input signal clamping and offset correction of the input
CDS is also performed. The stable gain control is linear
in dB. Additionally, the black level is quickly recovered
after gain change.
The VSP2232Y is pin-to-pin compatible with the
VSP2262Y (12-bit 20 MHz) one-chip product.
The VSP2232Y is available in a 48-pin LQFP package
and operates from a single 3-V/3.3-V supply.
VSP2232 block diagram
Programmable
Gain Amplifier
(PGA)
–6 to 42 dB
Correlated
Double
Sampling (CDS)
Analog-to-Digital
Converter
Output
Latch
12-Bit
Digital
Output
Timing Control
Reference Voltage Generator
Optical Black (OB)
Level Clamping
Preblanking
Serial Interface
Input
Clamp
CCD
Output
Signal
B(0–11)
CLPDM
SHP SHD
SLOAD SCLK SDATA
RESET
ADCCK
DRVDD
VCC
GNDA
DRVGND
REFP
CM
REFN
BYPM
BYP
BYPP2
CPLOB
COB
PBLK
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
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