STV0056A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV0056A' PDF : 26 Pages View PDF
STV0056A
PIN INTERNAL CIRCUITRY
S1 VID RTN, S2 VID RTN, S3 VID RTN,
CLAMP IN
50µA source is active only when VIDIN < 2.7V.
Figure 1
50µA
VDD 9V
S1 VID RTN
S2 VID RTN
S3 VID RTN
CLAMP IN
10kΩ
1µA
1
VDD 5V
1
GND 0V
S3 VID OUT
I black level is I2C programmable from source 16µA
to sink 33µA equivalent to an offset voltage of
-150mV to + 300mV.
The 60Ω collector resistor is for short cct. protec-
tion.
Figure 2
60Ω
VCC 12V
VID MUX
4
2.3mA
GND 0V
10kΩ
16.7kΩ
S3 VID OUT
25kΩ
VREF 2.4V
I Black Level
GND 0V
S1 VID OUT, S2 VID OUT
Same as above but with no black level adjustment.
Figure 3
60Ω
VCC 12V
VID MUX
4
2.3mA
GND 0V
10kΩ
20kΩ
20kΩ
S1 VID OUT
S2 VID OUT
VREF 2.4V
GND 0V
UNCL DEEM
Same as above but with no black level adjustment
and slightly different gain.
Figure 4
60Ω
VCC 12V
4
UNCL DEEM
2.3mA
IN
10kΩ
GND 0V
25kΩ
VREF 2.4V
16.7kΩ
GND 0V
VIDEEM1
Ron of the transistor gate is ≈10kΩ.
Figure 5
6µ/2µ
10µ/2µ
VIDEEM1
1
125µA
VIDEEM2 / 22kHz
Ron of the transistor gate is ≈10kΩ.
Figure 6
6µ/2µ
10µ/2µ
VIDEEM2/22kHz
1
125µA
VDD 5V
100µ/2µ
60µ/2µ
22kHz
13/26
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