TDA3856 Datasheet, PDF (2/17 Pages) NXP Semiconductors – Quasi-split sound processor for all standards

Philips Semiconductors
Quasi-split sound processor for all standards
Product specification
TDA3856
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-compatible 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 mW power
dissipation at 5 V.
QUICK REFERENCE DATA
SYMBOL
V_P
I_P
V_{i IF}
V_o(RMS)
V_o(RMS)
THD
S/N (W)
PARAMETER
supply voltage (pin 21)
supply current
IF input sensitivity (−3 dB)
audio output signal for FM (B/G)
audio output signal for AM (L)
total harmonic distortion
for FM
for AM
weighted signal-to-noise ratio
for FM
for AM
MIN.
4.5
−
−
−
−
TYP.
5
60
70
1
0.6
MAX.
8.8
72
100
−
−
UNIT
V
mA
µV
V
V
−
0.5
−
%
−
1
−
%
−
68
−
dB
−
56
−
dB
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
PINS
TDA3856
24
TDA3856T
24
Note
1. SOT234-1; 1996 November 28.
2. SOT137-1; 1996 November 28.
PIN
POSITION
shrink DIL
SO
PACKAGE
MATERIAL
plastic
plastic
CODE
SOT234⁽¹⁾
SOT137⁽²⁾
June 1994
2