TSH340 STMicroelectronics, TSH340 Datasheet - Page 10

• Manufacturer Part Number: TSH340
• Description: Video buffer, single supply, low input and output rail of 40mV/GND
• Manufacturer: STMicroelectronics

Specifications of TSH340

• Bandwidth: 320MHz
• Slew Rate: 780V/μs
• Voltage Input Noise: 7nV/√Hz

TSH340
5 Using the TSH340 to Drive Video Signals
Figure 24. 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
Video
Video
DAC
DAC
OL
(100MHz) = 180mV
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.
Video
Video
DAC
DAC
DC component
DC component
White Level
White Level
Black Level
Black Level
1Vpp
1Vpp
1Vpp
OS
1Vpp
1Vpp
1Vpp
and V
=125mV
=125mV
Reconstruction
Reconstruction
Filtering
Filtering
100 IRE
100 IRE
33uF
33uF
LPF
LPF
30 IRE
30 IRE
0 IRE
0 IRE
OL
(Figure
variations).
Reconstruction
Reconstruction
1k
1k
Filtering
Filtering
LPF
LPF
6dB
6dB
+5V
+5V
Synchronization Tip
Synchronization Tip
8)
300mV
300mV
Volt
Volt
6dB
6dB
+5V
+5V
Volt
Volt
Video
Video
Signal
Signal
Image Content
Image Content
125mV
125mV
0V
0V
Video
Video
Signal
Signal
Using the TSH340 to Drive Video Signals
2.250V
2.250V
time
time
250mV
250mV
2.250V
2.250V
time
time
250mV
250mV
1Vp-p
1Vp-p
2Vpp
2Vpp
2Vpp
2Vpp
75Ω
75Ω
75Ω
75Ω
Volt
Volt
Volt
Volt
Volt
Volt
75Ω Cable
75Ω Cable
75Ω Cable
75Ω Cable
Video
Video
Signal
Signal
Video
Video
Signal
Signal
75Ω
75Ω
75Ω
75Ω
1.125V
1.125V
1.125V
1.125V
125mV
125mV
125mV
125mV
1.125V
1.125V
1.125V
1.125V
125mV
125mV
125mV
125mV
time
time
time
time
1Vpp
1Vpp
1Vpp
time
time
time
time
1Vpp
1Vpp
1Vpp