TDA7336 Datasheet, PDF (1/20 Pages) STMicroelectronics – STEREO PREAMP+ AMS+ DOLBY B* NOISE REDUCTION PROCESSOR

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TDA7336
STEREO PREAMP + AMS + DOLBY B*
NOISE REDUCTION PROCESSOR
DUAL CHANNEL PROCESSOR FOR PLAY-
BACK APPLICATIONS.
STEREO DOLBY B NR SYSTEM
LOW NOISE HEAD PREAMPLIFIER
MUTE, AMS (AUDIO MUSIC SENSOR)
FUNCTIONS
INTERNAL SWITCHES FOR EQUALIZATION
DOLBY REFERENCE LEVEL -6dBm
(388.2mVRMS)
MINIMUM NUMBER OF EXTERNAL COMPO-
NENTS
LOW SUPPLY CURRENT (18mA)
MIXED BIPOLAR/CMOS TECHNOLOGY
DESCRIPTION
The TDA7336 is a monolithic BICmos IC de-
signed for use in stereo cassette player systems.
The device includes two separate audio channels
composed by low noise preamplifier, Dolby B
noise reduction system and Audio Music Sensor.
The dual preamplifier contains mute, metal/nor-
mal facilities for amplification of low level signal in
applications requiring very low noise perform-
ances.
Each channel consists of two cascaded opera-
tional amplifiers.
The first one, AMP1, has a fixed gain of 36dB,
and allows magnetic heads connection directly to
ground. The second one, AMP2, is a standard op-
erational amplifier whose equalizing external
components fix the frequency response.
The Audio Music Sensor circuit detects the inter-
program space and then the starting point of mu-
sical programs (the interprogram time and pro-
gram detection time are externally selectable).
The device contains Dolby B decoder NR chains
requiring very few external components and do
not require coils.
* Dolby B and the Double-D symbol are
trademarks of Dolby Laboratories Li-
censing Corporation, San Francisco,
California 94103-4813, USA.
This device is available only to Licens-
ing and application information may be
obtained from Dolby Lab.
SO28
ORDERING NUMBER: TDA7336
PIN CONNECTION (Top view)
GND
1
INL
2
EQLI
3
EQLO
4
OUTL 5
DINL
6
AMS SW 7
INTP
8
INTS
9
MUTE
10
TCL
11
DOUTL
12
IREF
13
N.C.
14
28
EQ.SW
27
INR
26
EQRI
25
EQRO
24
OUTR
23
DINR
22
GND DIG
21
AMSOUT
20
AMSGin
19
NR SW
18
TCR
17
DOUTR
16
VREF
15
Vs
D94AU052
November 1999
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