TDA7336 datasheet(1/20 Pages) STMICROELECTRONICS

部件名	TDA7336

功能描述	STEREO PREAMP AMS DOLBY B* NOISE REDUCTION PROCESSOR

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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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.

November 1999

®

DINL

AMS SW

INTP

INTS

MUTE

DOUTL

TCL

IREF

N.C.

1

3

2

4

5

6

7

8

9

Vs

VREF

DOUTR

NR SW

TCR

AMSGin

AMSOUT

GND DIG

DINR

23

22

21

20

19

17

18

16

15

D94AU052

10

11

12

13

14

28

27

26

25

24

GND

INL

EQLI

EQLO

OUTL

OUTR

EQRO

EQRI

INR

EQ.SW

PIN CONNECTION (Top view)

SO28

ORDERING NUMBER: TDA7336

1/20

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