TDA3858

Features:

· Quasi-split sound processor for all standards e. g. B/G (FM sound) and L (AM sound)
· 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 (at B/G) by the input level
· AM signal processing for L standard and switching over the audio signal
· Stereo matrix correction
· Layout-compatible with TDA3856 (24 pins) and TDA3857 (20 pins).


Pinout




Specifications

SYMBOL	PARAMETER	MIN.	MAX.	UNIT
VP1	supply voltage (pin 27)	-	8.8	V
VP2	supply voltage (pin 28)	-	13.2	V
VI	voltage (pins 1, 2, 6, 10, 11, 21, 23, 25, 31and 32)	0	VP	V
VI(12 V)	voltage at 12 V supply (pin 6)	0	5.5	V
Ptot	total power dissipation	0	950	mW
Tstg	storage temperature	-25	+150
Tamb	operating ambient temperature	0	+70
VESD	electrostatic handling (note 1) all pins except pins 1, 2, 31 and 32 pins 1, 2, 31 and 32	±500 +400 -500	- - -	V V V

Description

Separate symmetrical IF inputs for FM or AM sound TDA3858.

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 TDA3858 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.