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TSH173IDT

P1-P3P4-P6P7-P9P10-P12P13-P13
TSH173 Electrical characteristics
7/13
Figure 13. Higher output rail vs. T
amb
Figure 14. Gain matching vs. T
amb
-40-200 20406080
2.0
2.5
3.0
3.5
4.0
Vcc=5V
Load=150
Ω
V
OH
(V)
Ambient Temperature (°C)
-40-200 20406080
0.0
0.2
0.4
0.6
0.8
1.0
Vcc=+5V
Load=150
Ω
Vin=+0.3V and +1V
GM (%)
Ambient Temperature (°C)
Figure 15. I
sink
vs. T
amb
Figure 16. I
source
vs. T
amb
Figure 17. I
bias
vs. T
amb
-40-200 20406080
20
25
30
35
40
45
50
Vcc=+5V
Isink (mA)
Ambient Temperature (°C)
-40-200 20406080
20
25
30
35
40
45
50
Vcc=+5V
Load=150
Ω
Isource (mA)
Ambient Temperature (°C)
-40-200 20406080
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Vcc=+5V
Load=150Ω
I
BIAS
(µA)
Ambient Temperature (°C)
Electrical characteristics TSH173
8/13
3.1 Synchronization tip
The TSH173, in single 0/5V supply, is designed to drive the video signal on the line without
any damage to the synchronization tip. This is achieved by a small internal DC shift and a
very low output rail. The DAC offset, as shown in Figure 18, can be as low as 0V.
Nevertheless, in order to minimize the DC component on the line, the output can be AC
coupled by a capacitor (Figure 20).
Figure 18. Input signal
Figure 19. DC coupled output configuration
Figure 20. AC coupled output configuration
DAC offset
GND
4.6µs
160ns
300mV
Black (30 IRE)
64µs
150ns
Synchronization tip
(0 IRE)
75Ω
75Ω Cable
75Ω
Video
DAC
TSH173
V
out
V
in
75Ω
75Ω Cable
75Ω
Video
DAC
220µF
V
in
V
ou
t
TSH173
TSH173 Electrical characteristics
9/13
3.2 Power supply considerations
Correct power supply bypassing is very important for optimizing performance in high-
frequency ranges. Bypass capacitors should be placed as close as possible to the IC pins to
improve high-frequency bypassing. A capacitor greater than 10µF is necessary to minimize
the distortion. For better quality bypassing, we recommend to add a 10nF capacitor, also
placed as close as possible to the IC pins. Bypass capacitors must be incorporated for both
the negative and the positive supply.
Figure 21. Circuit for power supply bypassing
+VCC
10µF
+
10nF
5
TSH173
IN1
IN2
IN3
OUT1
OUT2
OUT3
4
P1-P3P4-P6P7-P9P10-P12P13-P13

TSH173IDT

Mfr. #:
Buy TSH173IDT
Manufacturer:
STMicroelectronics
Description:
Video Amplifiers Triple Video Buffer
Lifecycle:
New from this manufacturer.
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