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Notes on video line driving

TA0310

Implementation of TSH7x-TSH8x-TSH9x-TSH11x families in dual supply -5V/+5V:

In this scenario, the implementation of the op-amp is much more simple because the video signal

amplitudes are far away from the rails. But the drawback of this solution is the cost of the providing a

power supply of -5V.

Ω for TSH7x-8x-9x, 680Ω for TSH11x (see datasheet).

Frequency response of TSH7x-8x-9x-11x:

Figure 10: Implementation of the TSH7x-8x-9x-11x in dual supply -5V/+5V

Figure 11: Small Signal Bandwidth. Gain=+2, Rload=150ohms

video line

75

Ω

75

Ω

+

-

+5V

0Volt

TSH

2Vpp

1Vpp

0Volt

1Vpp

-5V

Signal on the line

+5V

-5V

1Vp-p

300mV

0V

1M

10M

100M

0

1

2

3

4

5

6

7

8

TSH9x, -5V/+5V

-3dB Bw = 75MHz

TSH11x, 0/+5V

-3dB Bw = 80MHz

TSH11x, -5/+5V

-3dB Bw = 110MHz

TSH7x-8x, -5V/+5V

-3dB Bw = 48MHz

TSH7x-8x, 0/+5V

-3dB Bw = 48MHz

Frequency (Hz)