TSH341 STMicroelectronics, TSH341 Datasheet - Page 10

• Manufacturer Part Number: TSH341
• Description: Video op-amp, single supply, low input and output rail of 40mV/GND
• Manufacturer: STMicroelectronics

Specifications of TSH341

• Bandwidth: 300MHz
• Slew Rate: 400V/μs
• Voltage Input Noise: 7nV/√Hz

TSH341
5 Using the TSH341 to Drive Video Signals
Figure 25. Implementation of the video driver on output video DACs
10/13
V
To drive the video signal properly, the output of the driver must be at least equal to
250mV (assuming V
OL
Video
Video
DAC
DAC
Video
Video
DAC
DAC
(50MHz) = 150mV (
2nd solution:
Implementation of a DC component in the input of the driver.
1st solution:
Set the video DAC 0-IRE output level to 125mV.
DC component
DC component
Black Level
Black Level
White Level
White Level
1Vpp
1Vpp
1Vpp
1Vpp
1Vpp
1Vpp
=125mV
=125mV
Reconstruction
Reconstruction
33uF
33uF
Filtering
Filtering
LPF
LPF
100 IRE
100 IRE
io
30 IRE
30 IRE
0 IRE
0 IRE
and V
Reconstruction
Reconstruction
Figure 8
1k
1k
Filtering
Filtering
LPF
LPF
Rg
Rg
+
+
_
_
+5V
+5V
OL
Rfb
Rfb
variations).
)
Synchronization Tip
Synchronization Tip
Rg
Rg
Volt
Volt
+
+
_
_
+5V
+5V
300mV
300mV
Rfb
Rfb
Video
Video
Signal
Signal
Volt
Volt
Video
Video
Signal
Signal
2.250V
2.250V
time
time
Image Content
Image Content
250mV
250mV
Using the TSH341 to Drive Video Signals
150mV
150mV
0V
0V
2.250V
2.250V
time
time
250mV
250mV
2Vpp
2Vpp
75Ω
75Ω
2Vpp
2Vpp
1Vp-p
1Vp-p
75Ω
75Ω
Volt
Volt
Volt
75Ω Cable
75Ω Cable
Volt
Volt
Volt
Video
Video
Signal
Signal
75Ω Cable
75Ω Cable
Video
Video
Signal
Signal
75Ω
75Ω
1.125V
1.125V
1.125V
1.125V
125mV
125mV
125mV
125mV
time
time
time
time
1Vpp
1Vpp
1Vpp
75Ω
75Ω
1.125V
1.125V
1.125V
1.125V
125mV
125mV
125mV
125mV
time
time
time
time
1Vpp
1Vpp
1Vpp