TDA7335 SGS-Thomson-Microelectronics, TDA7335 Datasheet

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TDA7335

Manufacturer Part Number
TDA7335
Description
STEREO PREAMPLIFIER + AMS + DOLBY-B
Manufacturer
SGS-Thomson-Microelectronics
Datasheet

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DESCRIPTION
The TDA7335 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, autoreverse,
metal/normal facilities for amplification of low level
signal in applications requiring very low noise per-
formances.
Each channel consists of two cascaded opera-
tional amplifiers.
The first one, AMP1, has a fixed gain of 36dB,
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.
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.
November 1999
BACK APPLICATIONS.
SIC SENSOR) FUNCTIONS
(388.2mV
NENTS
DUAL CHANNEL PROCESSOR FOR PLAY-
STEREO DOLBY B NR SYSTEM
LOW NOISE HEAD PREAMPLIFIER
MUTE, AUTOREVERSE, AMS (AUDIO MU-
INTERNAL SWITCHES FOR EQUALIZATION
DOLBY
MINIMUM NUMBER OF EXTERNAL COMPO-
LOW SUPPLY CURRENT (18mA)
MIXED BIPOLAR/CMOS TECHNOLOGY
* 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.
RMS
REFERENCE
)
LEVEL
STEREO PREAMP + AMS + DOLBY B*
-6dBm
NOISE REDUCTION PROCESSOR
PIN CONNECTION (Top view)
ORDERING NUMBER: TDA7335
SDIP30
TDA7335
1/20

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TDA7335 Summary of contents

Page 1

... NENTS LOW SUPPLY CURRENT (18mA) MIXED BIPOLAR/CMOS TECHNOLOGY DESCRIPTION The TDA7335 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. ...

Page 2

... TDA7335 ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage S P Total Power Dissipation tot T Operating Temperature Range op Storage Temperature Range T stg THERMAL DATA R Thermal resistance junction-pins th j-pins PIN FUNCTIONS N. Name V ( GND Ground 2 Preamplifier Left Inputs 1 4,27 EQLI, EQRI 4.6 Equalizer Inputs ...

Page 3

... Figure 1: Application Circuit AMSout AMSGin DINR SW F/R C17 F 0.68 C4 10nF TDA7335 INTS F 0.1 C7 INTP R7 470K AMSSW DINL 10nF C15 OUTL SW EQ 3/20 ...

Page 4

... TDA7335 Figure 1a: Components& Top Copper Layer of the Fig. 1 (1:1 scale). Figure 1b: Bottom Copper Layer of the Fig. 1 (1:1 scale). 4/20 ...

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... TEST CIRCUIT AMSout AMSGin DINR SW F/R C4 10nF TDA7335 INTS F 0.1 C7 INTP R7 470K AMSSW DINL 10nF C15 OUTL SW EQ 5/20 ...

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... TDA7335 ELECTRICAL CHARACTERISTICS (V all level referenced to -6dBm/400Hz see application circuit of Fig. 1) NAB METAL position. SUPPLY Symbol Parameter V Supply Voltage S I Supply Current S V Reference Voltage (pin 17) ref V DC Voltage pin 14 (R11 = 43K) DC SVR Ripple Rejection (Input referred) MUTE Mute Threshold Pin11 ...

Page 7

... Flip-Flops FF and FF 1 program detector external C charging current at the AMS SW pin is about follows that the reset time (C V )/I is given approximately by 0.122 pin8 C15 C ns where TDA7335 Min. Typ. Max. Unit 100 200 300 -1.5 0 1.5 dB -26.5 -25 -23 ...

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... TDA7335 c)From now on where the sum input signal (left- right) amplified by the limiter exceeds the sig- nal detector threshold (3) the capacitor C forced to charge. When the voltage across this capacitor reaches the COMP threshold voltage V (approx th1 FF is set and FF is reset. (4) It follows that ...

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... Figure 3: AMS Timing Diagram Figure 4 TDA7335 9/20 ...

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... TDA7335 ELECTRICAL COMPONENT DESCRIPTION (see figure 1) RECOMMENDED COMPONENT VALUE 300K 0. 10k 470K 100K 0.68 F 10% ...

Page 11

... PINS DESCRIPTION: Internal Configuration Figure 7: PINS Figure 9: PINS Figure 11: PINS Figure 8: PIN: 9 Figure 10: PINS Figure 12: PINS TDA7335 11/20 ...

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... TDA7335 PINS DESCRIPTION: Internal Configuration Figure 13: PINS Figure 15: PIN: 10 Figure 17: PIN: 21 12/20 Figure 14: PIN: 14 Figure 16: PIN: 22 Figure 18: PIN: 30 ...

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... PINS DESCRIPTION: Internal Configuration Figure 19: PIN DEVICE CHARACTERISTICS Figure 21: Quiescent Current vs. Supply Voltage Figure 23: THD vs Supply Voltage Figure 20: PIN: 17 Figure 22: Quiescent Current vs. Temperature Figure 24: THD vs Frequency TDA7335 13/20 ...

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... TDA7335 DEVICE CHARACTERISTICS (continued) Figure 25: THD vs. Output Signal Figure 27: Channel Separation vs. Frequency Figure 29: Ripple Rejection vs. Frequency 14/20 Figure 26: THD + N vs. Frequency Figure 28: Cross Talk vs. Frequency Figure 30: Ripple Rejection vs. Frequency ...

Page 15

... DEVICE CHARACTERISTICS (continued) Figure 31: Ripple Rejection vs. Frequency Figure 33: Mute Threshold Figure 35: V & I vs. Temperature ref. ref. Figure 32: Mute Attenuation vs. Frequency Figure 34: V & I vs. V ref. ref. supply Figure 36: D.C. Voltage pin 14 vs. V TDA7335 supply 15/20 ...

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... TDA7335 DEVICE CHARACTERISTICS (continued) Figure 37: Equalizer Threshold Figure 39: Noise Reduction Threshold Figure 41: Signal Handling vs. V supply 16/20 Figire 38: Forward/Reverse Threshold Figure 40: Load Characteristcs Figure 42: Signal handling vs. Temperature ...

Page 17

... DEVICE CHARACTERISTICS (continued) Figure 43: AMS Threshold vs. Frequency Figure 45: AMS Reset Time vs Figure 47: Interprogram Charging Current Figure 44: AMS Threshold vs Figure 46: AMS Interprogram vs. C7 Figure 48: Interspace vs. C9 TDA7335 17/20 ...

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... TDA7335 DEVICE CHARACTERISTICS (continued) Figure 49: NAB Network 18/20 Figure 50: Dolby-B Table Normal Metal ...

Page 19

... DIM. MIN. TYP. MAX. MIN. TYP. A 5.08 A1 0.51 0.020 A2 3.05 3.81 4.57 0.12 0.15 B 0.36 0.46 0.56 0.014 0.018 B1 0.76 0.99 1.40 0.030 0.039 C 0.20 0.25 0.36 0.008 0.01 D 27.43 27.94 28.45 1.08 1.10 E 10.16 10.41 11.05 0.400 0.410 E1 8.38 8.64 9.40 0.330 0.340 e 1.778 0.070 e1 10.16 0.400 L 2.54 3.30 3.81 0.10 0. (min.), 15 (max.) S 0.31 0.012 OUTLINE AND MECHANICAL DATA MAX. 0.20 0.18 0.022 0.055 0.014 1.12 0.435 0.370 0.15 SDIP30 (0.400”) TDA7335 19/20 ...

Page 20

... TDA7335 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 ...

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