Philips TDA3868t free download

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INTEGRATED CIRCUITS DATA SHEET TDA3868T Quasi-split sound processor for all standards Preliminary specification File under Integrated Circuits, IC02 January 1992 Philips Semiconductors Preliminary specification Quasi-split sound processor for all standards FEATURES · Quasi-split sound processor for all standards e. g. B/G (FM sound) and L (AM sound) · Reduction of spurious video signals by tracking function and AFC for the vision carrier reference circuit; (indispensable for NICAM) · AF2 signal automatically muted (at B/G) by input signal level · AM signal processing for L standard and audio switching over · Stereo-matrix correction · AM output level typically 500 mV at m = 0.54 (+2.5 dB in comparison to TDA3858) GENERAL DESCRIPTION TDA3868T Separate symmetrical IF inputs for FM and AM sound. Gain controlled wideband IF amplifier and input select switch. AGC generation due to peak-sync for FM or mean signal level for AM. Reference amplifier to regenerate the vision carrier. Limiting amplifier optimized for AM suppression of the regenerated vision carrier signal and 90° phase shifter. Intercarrier mixer for FM sound, output with low-pass filter. Separate signal processing for 5.5 and 5.74 MHz intercarriers. Wide supply voltage range, only 300 mW power dissipation at 5 V. QUICK REFERENCE DATA SYMBOL VP Data at VP = 5 V IP Vi IF Vo THD supply current (pin 24) IF input sensitivity (-3 dB) audio output signal for FM standard B/G (RMS value) audio output signal for AM standard L (RMS value) total harmonic distortion for FM for AM S/N (W) weighted signal-to-noise ratio for FM for FM with 6 kHz sinus vision modulation for AM ORDERING AND PACKAGE INFORMATION EXTENDED TYPE NUMBER TDA3868T Note 1. SOT136-1; 1996 November 25. PACKAGE PINS 28 PIN POSITION mini-pack MATERIAL plastic CODE SOT136A(1) - - - 68 56 56 - - - dB dB dB - - 0.5 1 - - % % - - - - 60 70 1 0.5 72 100 - - mA µV V V PARAMETER supply voltage (pin 24) MIN. 4.5 5 TYP. MAX. 8.8 V UNIT January 1992 2 Philips Semiconductors Preliminary specification Quasi-split sound processor for all standards TDA3868T Fig.1 Block diagram (B/G and L standards). January 1992 3 Philips Semiconductors Preliminary specification Quasi-split sound processor for all standards PINNING SYMBOL AMIF1 AMIF2 CAGC CAM MODE MATR FM2R1 FM2R2 AF2 AF1 FM1R1 FM1R2 n.c. VC-R1 VC-R2 TRACK CAFAM FM1l CAF1 ICO CAF2 FM2l GND VP n.c. Cref FMIF1 FMIF2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 PIN DESCRIPTION AM IF difference input 1 for L standard (32.4 MHz) AM IF difference input 2 for L standard (32.4 MHz) charge capacitor for AGC (FM and AM) charge capacitor for AM AGC 3-state input for standard select input for stereo matrix correction reference circuit for FM2 (5.74 MHz) reference circuit for FM2 (5,74 MHz) AF2 output (AF out of 5.74 MHz) AF1 output (AF out of 5.5 MHz or AM) reference circuit for FM1 (5.5 MHz) reference circuit for FM1 (5.5 MHz) not connected reference circuit for