TDA3857

Features:

· Quasi-split sound processor for all FM standards e. g. B/G
· Reducing of spurious video signals by tracking function and AFC for the vision carrier reference circuit; (recommended for NICAM)
· Automatic muting of the AF2 signal by the input level
· Stereo matrix correction
· Layout-compatible with TDA3856 (24 pins) and TDA3858 (32 pins).


Pinout




Specifications

SYMBOL	PARAMETER	MIN.	MAX.	UNIT
VP	supply voltages (pin 19)	-	8.8	V
VI	voltage (pins 1, 6, 7, 13, 15, 17 and 20)	0	VP	V
Ptot	total power dissipation	0	635	mW
Tstg	storage temperature range	-25	150
Tamb	operating ambient temperature range	0	70
VESD	electrostatic handling (note 1) all pins except pins 1 and 20 pins 1 and 20	±500 +400 -500	- - -	V V V

Description

Symmetrical IF inputs TDA3857. Gain controlled wideband IF amplifier.

AGC generation due to peak sync. 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 TDA3857 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.