VSP2080 Datasheet, PDF (1/7 Pages) Burr-Brown (TI) – CCD SIGNAL FRONT-END PROCESSOR FOR DIGITAL CAMERAS

®
VSP2080 _®
VSP2080
TM _{CCD SIGNAL FRONT-END}
PROCESSOR FOR DIGITAL CAMERAS
FEATURES
q CCD SIGNAL PROCESSING
Correlated Double Sampling
Black Level Clamping
0 to +34dB Gain Range
55dB SNR Referred to Full Scale
q SELECTABLE LOGIC-INPUT POLARITY
Positive Active or Negative Active
q PORTABLE OPERATION
Low Voltage: 2.7V to 3.6V
Low Power: 144mW at 3.0V
Power-Down Mode: 10mW
APPLICATIONS
q VIDEO CAMERAS
q DIGITAL STILL CAMERAS
q PC CAMERAS
q SECURITY CAMERAS
REFCK DATCK
DESCRIPTION
The VSP2080 is a complete front-end processing IC
for digital cameras. The VSP2080 provides signal
conditioning for the output of a CCD array. The
VSP2080 provides correlated double sampling to ex-
tract the video information from the pixels, 0dB to
+34dB gain range with analog control for varying
illumination conditions, and black level clamping for
an accurate black reference. The stable gain control is
linear in dB. Additionally, the black level quickly
recovers after screen changes. The MODE pin allows
the selection of logic-input polarity. The VSP2080 is
available in a 20-lead TSSOP package.
MODE
AGC IN
OB
C
CCD
OUT
CCD D
Clamp
Correlated
Double
Sampling
Logic Input
Polarity
Control
+6dB
Log
VCA
Optical
Black Level
Auto-Zero
+28dB
OUT
CCD R
Dummy
Pixel
Auto-Zero
Internal
Bias
Generator
DUMC
REFT REFB REF IN
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©_{1998 Burr-Brown Corporation}
PDS-1498B
Printed in U.S.A. August, 1999