VSP2232 Datasheet, PDF (1/19 Pages) Texas Instruments – CCD SIGNAL PROCESSOR FOR DIGITAL CAMERAS

VSP2232
CCD SIGNAL PROCESSOR
FOR DIGITAL CAMERAS
SLAS320 – MAY 2001
FEATURES
D CCD Signal Processing
– Correlated Double Sampling (CDS)
– Programmable Black Level Clamping
D Programmable Gain Amplifier (PGA)
– –6-dB to 42-dB Gain Ranging
D 10-Bit Digital Data Output
– Up to 36-MHz Conversion Rate
– No Missing Codes
D 76-dB Signal-to-Noise Ratio
D 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
CLPDM SHP SHD
SLOAD SCLK SDATA
RESET
ADCCK DRVDD VCC
Input
Clamp
Serial Interface
Correlated
Double
Sampling (CDS)
Programmable
Gain Amplifier _{–6 to 42 dB}
(PGA)
Timing Control
Analog-to-Digital
Converter
Output
Latch
12-Bit
Digital
Output
B(0–11)
CCD
Output
Signal
Preblanking
Optical Black (OB)
Level Clamping
Reference Voltage Generator
PBLK
COB CPLOB BYPP2 BYP BYPM REFN CM REFP DRVGND
GNDA
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.
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
testing of all parameters.
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Copyright  2001, Texas Instruments Incorporated
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