
Correlated
Double
Sample
Log
Gain
Control
10-Bit
A/D
DC
Set
DC
Set
Gain
Set
Clamp
CCD
DSP
Digital
Video
Output
CCD or CIS
Sampler
RED
Sensor
GRN
Sensor
BLU
Sensor
3-to-1
MUX
Black and
Gain Set
12-Bit
10MHz
A/D
CCD or CIS
Sampler
CCD or CIS
Sampler
Control
Digital
Video
Output
Serial
Control
Output
LCD Displays and Projectors
The 8-bit 60MHz
ADS830
and the 8-bit 80MHz
ADS831
offer
outstanding differential non-linearity performance with a
typical error of only 0.2 LSBs and 7.9 effective bits, making
them attractive for RGB to LCD conversion in both VGA and
SVGA systems. Along with the triple channel
OPA3681,
these
converters provide a winning combination.
See Figure 15.
549
24.9
OPA3681A
A/D
Converter
Digital
Video
Output
REFT
549
825
549
549
549
1650
549
22pF
2Vp-p
Differential
0.1
549
OPA3681C
24.9
OPA3681B
549
549
22pF
Video In
0 to 1Vp-p
Burr-Brown
ADS8xx
Video Analog-to-Digital Conversion Systems
Burr-Brown offers a complete, A/D solution for video.
These A/Ds operate on a single +5V supply at low power, come
in SSOP packages, and the driver op amps are small and lowest
in cost. These op amps provide low distortion and highest video
signal to noise.
See Figure 14.
Our A/D converters for video range from 8-bit, 30MHz to 14-bit,
65MHz. See
Speed
PLUS A/D converters for selections. The SNR
numbers in the selection table can be adjusted by 9dB for video
applications. Burr-Brown also offers a wide variety of video
drivers as shown in
Speed
PLUS op amps.
3-Input CCD/CIS Signal Processor with A/D
VSP3000
provides a complete, three-input imaging signal for
CCD or CIS sensors. In CCD mode, it provides line (row) input
clamps and correlated double samplers for data and reference
timed to the CCD signal. In CIS mode, an input reference and
correlated single samplers sample data timed to the CIS signal.
Gain range is 0 to 13dB, linear in dB. The A/D’s high resolution
allows black level and gain control from DSP. Reference can be
internal or external. Programming can be parallel and/or
serial. The single A/D design uses only 350mW (CDS mode)
and comes in a small, 48-lead LQFP.
See Figure 13.
Video/CCD Imaging Solutions
www.burr-brown.com
Fig. 13
Fig. 14
CCD Video Signal Processors
Burr-Brown offers a complete line of imaging signal processors
for video and still cameras with line (row) rate clamps, and
correlated double samplers for data and reference timed to the
CCD signal. Each provides a 0 to +34dB remote gain amplifier,
linear in dB, and black level controls for the CDS and inputs.
All are complete solutions with internal references.
See Figure 12.
VSP2000
– Internal A/D Converter Analog Gain Control
VSP2080
– External A/D Converter Analog Gain Control
VSP2101
– Internal A/D Converter Digital Gain Control
CCD Imaging, Striped Color or Monochrome
CCD or CIS Scanners or Cameras
Computer
High
Resolution
LCD Display
or
Projector
DR
OPA680
ADS831
OPA680
R
G
B
ADS831
OPA680
ADS831
Fig. 15
Fig. 12