TDA6051-5X

Video IF with FPLL, MAC State and Vision Carrier Output Preliminary Data Features q Active multistandard video IF with FPLL demodulator q 12-MHz bandwidth q MAC state q Picture carrier output for TDA 6048-5X TDA 6051-5X Bipolar IC P-DSO-20 Type TDA 6051-5X Ordering Code Q67000-A5125 Package P-DSO-20 (SMD) Functional Description Multistandard video IF with FPLL and IF-carrier output to work in conjunction with TDA 6048-5X. Application Multistandard TV/VTR and cable converters with mono or stereo applications. Semiconductor Group 73 06.94 TDA 6051-5X Circuit Description The IF circuit consists of a four-stage capacitively coupled and symmetrically designed controlled amplifier and a real synchronous demodulator with a FPLL-carrier regeneration. Two IF inputs can be selected for applications with different SAWs. The main performance of the device is the very low differential phase DP and gain DG combined with an excellent intermodulation ratio. The positive video output is used to derive the IF and tuner control voltage. The AGC threshold is set by means of a potentiometer. Dependent on the modulation polarity the video signal and the AGC are switched over. MAC state can be selected by an additional signal. Pin Functions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Function IF input 1a IF input 1b IF switch Tuner AGC output Tuner AGC threshold Main AGC-time constant Mean value AGC-time constant Positive/negative modulation switch Video carrier output V...