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STV0056 Scheda tecnica(PDF) 13 Page - STMicroelectronics

Il numero della parte STV0056
Spiegazioni elettronici  SATELLITE SOUND AND VIDEO PROCESSORS
PDF  26 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV0056 Scheda tecnica(HTML) 13 Page - STMicroelectronics

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50
µA
1
µA
10k
Ω
S1 VID RTN
S2 VID RTN
S3 VID RTN
CLAMP IN
V
DD 5V
GND 0V
1
1
V
DD 9V
Figure 1
2.3mA
GND 0V
4
V
CC 12V
VID MUX
10k
Ω
16.7k
Ω
GND 0V
I Black Level
60
Ω
S3 VID OUT
V
REF 2.4V
25k
Ω
Figure 2
2.3mA
GND 0V
4
V
CC 12V
VID MUX
10k
Ω
20k
Ω
GND 0V
60
Ω
S1 VID OUT
S2 VID OUT
V
REF 2.4V
20k
Ω
Figure 3
2.3mA
GND 0V
4
V
CC 12V
IN
10k
Ω
16.7k
Ω
GND 0V
60
Ω
UNCL DEEM
V
REF 2.4V
25k
Ω
Figure 4
1
125
µA
6
µ/2µ
10
µ/2µ
VIDEEM1
Figure 5
1
125
µA
6
µ/2µ
10
µ/2µ
VIDEEM2/22kHz
V
DD 5V
100
µ/2µ
60
µ/2µ
22kHz
Figure 6
PIN INTERNAL CIRCUITRY
S1 VID RTN, S2 VID RTN, S3 VID RTN,
CLAMP IN
50
µA source is active only when VIDIN < 2.7V.
S3 VID OUT
I black level is I
2C programmablefrom source 16µA
to sink 33
µA equivalent to an offset voltage of
-150mV to + 300mV.
The 60
Ω collector resistor is for short cct. protec-
tion.
S1 VID OUT, S2 VID OUT
Same as above but with no black level adjustment.
UNCL DEEM
Same as above but with no black level adjustment
and slightly different gain.
VIDEEM1
Ron of the transistor gate is
≈10kΩ.
VIDEEM2 / 22kHz
Ron of the transistor gate is
≈10kΩ.
STV0056A
13/26



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