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參數(shù)資料
| 型號(hào)： | TMC22071AKHC1 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:66; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:18; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:18-35 RoHS Compliant: No |
| 中文描述： | 同步鎖相視頻數(shù)字化儀 |
| 文件頁數(shù)： | 16/24頁 |
| 文件大?。?/td> | 125K |
| 代理商： | TMC22071AKHC1 |
TMC22071A
PRODUCT SPECIFICATION
16
System Performance Characterlstics
Note:
1. NTSC/PAL compliant black burst at nominal input level
±
10%, frequencies nominal
±
10 ppm.
Figure 17. Typical Interface Circuit
Parameter
E
SCH
E
SCP
t
AL
V
XT
Min
Type
Max
±
3
±
2
2
-35
Units
ns
degrees
frames
dB
Sync time-base variation
1
Subcarrier Phase Error
1
Line-lock Acquisition Time
Channel-to-Channel Crosstalk @3.58 Mhz
10
μ
F
+5V
Digital Supply Plane
Analog Supply Plane*
Ferrite Bead
+5V
75
VIN1
VREF
RT
RB
CVBS7:0
GHSYNC
GVSYNC
PXCK
CBYP
DGND
DDS OUT
MICROPROCESSOR
INTERFACE
TMC22071A
Genlocking
Video Digitizer
D
I
PFD IN
COMP
VDDVDDA
AGND
VIN2
VIN3
EXT PXCK
CLK IN
CLK OUT
PXCK SEL
I
V
R
D
0
A
0
C
R
Video A
Video B
Video C
20 MHz, TTL
and
must be connected
via low-impedance path
*section of supply plane beneath
analog interface circuitry
75
75
3.3
μ
F
3.3
μ
F
3.3
μ
F
LPF
LPF
LPF
10
μ
F
6.8 pF
10
μ
H
150 pF
390
pF
0.01
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
LM385-1.2
0.1
μ
F
8
0.1
μ
F
0.1
μ
F
0.1
μ
F
LDV
65-22071A-19
Application Notes
The TMC22071A is a complex mixed-signal VLSI circuit.
It produces CMOS digital signals at clock rates of up to 15
MHz while processing analog video inputs with a resolu-
tion of less than a few millivolts. To maximize performance
it is important to provide an electrically quiet operating
environment. The circuit shown in Figure 17 provides an
optional external 1.2V reference to the V
REF
input of the
TMC22071A. The internal V
REF
source is adequate for
most applications.
Flltering
Inexpensive low-pass anti-aliasing filters are shown in Fig-
ures 18 and 20. These filters would normally be inserted in
the video signal path just before the 75
W
terminating resis-
tor and AC-coupling capacitor for each of the three video
inputs, V
IN1-3
. The filter of Figure 18 exhibits a 5th-order
Chebyshev response with-3dB bandwidth of 6.7MHz and a
group delay of 140 nanoseconds at 5MHz. The filter of Figure
19 has been equalized for group delay in the video signal
band. Its -3dB passband is 5.5MHz while the group delay is
constant at 220 nanoseconds through the DC to 5MHz
frequency band.
Figure 18. Simple Anti-aliasing Filter
2.2
μ
H
470 pF
65-22071-20
470 pF
1000 pF
2.2
μ
H
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