TA7678

TA7678 LINEAR INTEGRATED CIRCUIT VIDEO AND SOUND IF AMPLIFIER FOR MONOCHROME TV RECEIVERS DESCRIPTION The Contek TA7678 is a monolithic integrated circuit designed for the VIF and SIF stage in B/W television receivers. The UTC TA7678 is used for forward AGC Type. FEATURE VIF STAGE *High gain wide brand IF amplifier 50dB at 45MHz *Gain reduction with excellent stability: 55dB at 45MHz *Excellent DG/DP and S/N characteristics DIP-16 SIF STAGE *Excellent limiter characteristics *Excellent AM Rejection *Large undistorted audio output voltage with detector quadrature BLOCK DIAGRAM Contek Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:[email protected] 1 TA7678 PARAMETER Supply Voltage Open Loop Voltage Video DC output current (note) Operating Temperature Storage Temperature Power dissipation LINEAR INTEGRATED CIRCUIT C) ABSOLUTE MAXIMUM RATINGS (Ta=25 Vcc V4 SYMBOL VALUE 15 15 6 -20 to +65 -55 to 155 1.4 UNIT V V V C C W V12 Topr Tstg PD ELECTRICAL CHARACTERISTICS(Ta=25 PARAMETER Recommended Supply Voltage Quiescent circuit current Video DC output Terminal 5 voltage Terminal 7 voltage RF AGC Residual Output Voltage RF AGC Leak Current Video sensitivity AGC Range Sync Tip Level Voltage (pin12) Maximum IF Input Voltage White Noise Threshold (pin12) White Noise Clamp Level (pin12) Black Noise Threshold (pin12) Black Noise Clamp Level (pin12) Video Frequency Response Suppression of carrier Suppression of 2 nd C,Vcc=12V,fp=45.75MHz,unless ot...