January 2008

Rev 1

1/8

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:

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

– No input capacitor required

– R-G-B, Y-Pb-Pr, Y-C-CVBS driving

– Very low harmonic distortion

– 3 channels with 6dB gain buffer

– Each output can drive AC- or DC-coupled 150

Ω loads

– 3 video reconstruction filters for SD

– Tested on 5V power supply

– 3 internal input DC level shifter

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