AN2705 Datasheet, PDF (1/8 Pages) STMicroelectronics – TSH173 triple video buffer with filter for SD video

AN2705
Application note
TSH173 triple video buffer with filter for SD video
evaluation board user guidelines
Introduction
This application note describes the TSH173 evaluation board, designed to help you evaluate
the TSH173 triple video buffer.
This document includes:
■ A short description of the TSH173 video buffer, including the internal block diagram
■ A description of the evaluation board and all of its components
■ The layout of the evaluation board
About the TSH173
The TSH173 is a single supply triple video buffer featuring an internal gain of 6dB and an
internal low pass filter of 8.2MHz cut-off frequency for each channel to fit with Standard
Definition requirements for video line interfaces.
Figure 1. TSH173 evaluation board
Main features of the TSH173
– 4.5V to 5.5V single supply operation
– R-G-B, Y-Pb-Pr, Y-C-CVBS driving
– 3 channels with 6dB gain buffer
– 3 video reconstruction filters for SD
– 3 internal input DC level shifter
– No input capacitor required
– Very low harmonic distortion
– Each output can drive AC- or DC-coupled 150Ω loads
– Tested on 5V power supply
January 2008
Rev 1
1/8
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