SPT9210SCS Просмотр технического описания (PDF) - Signal Processing Technologies
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SPT9210SCS Datasheet PDF : 11 Pages
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SPT9210
ANALOG VIDEO PROCESSOR
FEATURES
• NTSC/PAL Compatible
• Composite/S-Video Input Selection Mux
• Integrated Dual Analog Signal Path
• Adjustable Internal Anti-Alias Filters
• Internal Clamp Circuits
• Automatic Gain Control
• Integrated Reference Voltage Source for SPT7852
• Matched Voltage Output Range for Driving SPT7852
APPLICATIONS
• High-End NTSC/PAL Video Decoding
• High Quality S-Video Decoding
• Video Frame Grabbing
• Professional Video
• VCR Signal Capture
• Security Cameras
GENERAL DESCRIPTION
The SPT9210 is the analog front-end processing chip for the
SPT video decoder chip set. The video decoder chip set is an
integrated three chip solution for high quality video signal
decoding of NTSC/PAL composite video and S-Video for-
mats at 8.9 effective number of bits of dynamic performance.
The SPT9210 is a fully integrated analog video processor
chip capable of processing standard video signals in either a
single-channel composite video input mode or a dual-chan-
nel S-Video (component Y/C) input mode. As part of the chip
set, the SPT9210 is specially designed to easily interface to
the downstream SPT7852 dual 10-bit analog-to-digital con-
verter (See figure 1.)
The SPT9210 provides luminance and chrominance channel
DC restoration, anti-alias filtering, automatic gain control and
signal offset and gain to match the front-end requirements of
the SPT7852 dual 10-bit analog-to-digital converter.
In addition to performing the analog processing of the video
signal before data conversion, the SPT9210 also provides
the voltage reference sources for the SPT7852. The SPT9210
is available in a 20-lead SOIC package and operates over the
commercial temperature range. It requires a single +5 V
supply and dissipates 620 mW of power.
BLOCK DIAGRAM
Clamp
Select SW
1
SW
Input Y/C 19
Clamp
Low Pass
Filter
Input Y 2
Sync
Separation
Bias
Input C 3
Bias
Low Pass
Filter
Vcc 20
Vref
10
GND
4
18
Vref
Vref
Clamp
Frequency
Adjustment
17
Filter Adj.
C-AGC
16
C-Clamp Y
15
Automatic
Gain Control
Clamp
3x
Delay
Gain Detect
Automatic
Gain Control
Clamp
3x
Voltage Regulator
9
7
8
12
13
11
VRL VRL VRL VRH VRH VRH
Adjust Force Sense Sense Force Adjust
5
C-Clamp C
14 Output Y
6 Output C
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: (719) 528-2300 FAX: (719) 528-2370
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