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PDF TDA7334 Data sheet ( Hoja de datos )
| Número de pieza | TDA7334 | |
| Descripción | LOW NOISE STEREO PREAMPLIFIER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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® TDA7334
LOW NOISE STEREO PREAMPLIFIER
DUAL CHANNEL PROCESSOR FOR PLAY-
BACK APPLICATIONS.
LOW NOISE HEAD PREAMPLIFIER
GROUND COMPATIBLE
MUTE, AUTOREVERSE METAL/NORMAL
FUNCTIONS
INTERNAL SWITCHES FOR EQUALIZATION
LOW SUPPLY CURRENT
MIXED BIPOLAR/CMOS TECHNOLOGY
DIP16
SO16
DESCRIPTION
The TDA7334 is a monolithic BICmos IC de-
signed for use in stereo cassette player systems.
The dual preamplifier contains mute, autoreverse,
metal/normal facilities for amplification of low level
signal in applications requiring very low noise per-
formance.
Each channel consists of two cascaded opera-
tional amplifiers.
The first one, AMP1, has a fixed gain of 32dB,
TEST CIRCUIT
ORDERING NUMBER: TDA7334 (DIP16)
TDA7334D (SO16)
low noise forward/reverse switchable input, 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.
R15 6.2K
C4 10nF
EQRO 12
R13
R11 1.2K 6.8K
C11
1µF
INPUT R
C6
300pF
R10
600Ω
C5
300pF
R12
300K
EQRI
13
INR2 14
INR1 15
R9
600Ω
INPUT L
C3
300pF
R3
1.2K
C1
1µF
R1
600Ω
C2
300pF
INL1
INL2
R2
600Ω
R4
6.8K
R5
300K
EQLI
EQLO
C8 10nF
2
3
4
5
R14 6.2K
32dB
AMP1
AMP1
32dB
RN
AMP2
AMP2
RN
D94AU079
9 VS
GND
1
C12
100nF
+VS
C13 0.22µF
11 OUTR
20K
8 F/RSW
R7 10K
+VS
7 MUTE
C9
100nF
C14 0.22µF
6 OUTL
20K
16 EQSW
R8 10K
GND
+VS
November 1999
1/11
1 page  
Figure 1: Quiescent Current vs. Supply
TDA7334
Figure 2: D.C. Output vs. Supply Voltage
Figure 3: Forward/Reverse Threshold
Figure 4: Metal/Normal Threshold
Figure 5: Mute Threshold
Figure 6: Mute Attenuation vs. Frequency
5/11
5 Page 
TDA7334
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 1999 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco -
Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
11/11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TDA7334.PDF ] | |
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