TDA3856 Datasheet | NXP Semiconductors

FEATURES - Quasi-split sound processor for all standards e. g. B/G (FM sound) and L (AM sound) - Automatic muting of the AF2 signal (at B/G) by the input level - AM signal processing for L standard and switching over the audio signal - Layout-patible with TDA3858 (32 pins) and TDA3857 (20 pins). GENERAL DESCRIPTION Separate symmetrical IF inputs for FM or AM sound. Gain controlled wideband IF amplifier, input select switch. AGC generation due to peak sync for FM or mean signal level for AM. Reference amplifier for the regeneration of the vision carrier. Optimized limiting amplifier for AM suppression in 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 m W power dissipation at 5 V. QUICK REFERENCE DATA SYMBOL VP IP Vi IF Vo(RMS) Vo(RMS) THD supply current IF input sensitivity (- 3 d B) audio output signal for FM (B/G) audio output signal for AM (L) total harmonic distortion for FM for AM S/N (W) weighted signal-to-noise ratio for FM for AM ORDERING INFORMATION PACKAGE EXTENDED TYPE NUMBER TDA3856 TDA3856T Note 1. 2. SOT234-1; 1996 November 28. SOT137-1; 1996 November 28. PINS 24 24 PIN POSITION shrink DIL SO MATERIAL plastic plastic CODE SOT234(1) SOT137(2) - - 68 56 - - d B d B - - 0.5 1 - - % % PARAMETER supply voltage (pin 21) - - - - MIN. 4.5 5 60 70 1 0.6 TYP. MAX. 8.8 72 100 - - UNIT V m A µV V V June 1994 Philips Semiconductors Product specification Quasi-split sound processor for all standards Fig.1 Block diagram (B/G and L). June 1994 Philips Semiconductors Product specification Quasi-split sound processor for all standards PINNING SYMBOL AMIF1 AMIF2 CAGC CAM MODE FM2R1 FM2R2 AF2 AF1 FM1R1 FM1R2 VC-R1 VC-R2 CAFAM FM1| CAF1 ICO CAF2 FM2I GND VP CREF FMIF1 FMIF2 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 DESCRIPTION AM IF difference input 1...