tda7314 STMicroelectronics, tda7314 Datasheet

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tda7314

Manufacturer Part Number
tda7314
Description
Digital Controlled Audio Processor With Loudness
Manufacturer
STMicroelectronics
Datasheet

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DESCRIPTION
The TDA7314 is a volume, tone (bass and treble)
balance (Left/Right) and fader (front/rear) processor
for quality audio applications in car radio and Hi-Fi
systems.
PIN CONNECTION (Top view)
November 1999
ADAPTION TO DIFFERENT SOURCES
EQUALIZER OR NOISE REDUCTION SYS-
TEM
- 4 INDEPENDENT SPEAKERS CONTROL
- INDEPENDENT MUTE FUNCTION
RIAL BUS
1 STEREO INPUT
SELECTABLE INPUT GAIN FOR OPTIMAL
INPUT AND OUTPUT FOR EXTERNAL
LOUDNESS FUNCTION
VOLUME CONTROL IN 1.25dB STEPS
TREBLE AND BASS CONTROL
FOUR SPEAKER ATTENUATORS:
ALL FUNCTIONS PROGRAMMABLE VIA SE-
FADER FACILITIES
IN 1.25dB STEPS FOR BALANCE AND
DIGITAL CONTROLLED AUDIO PROCESSOR
Selectable input gain and internal loudness function
are provided. Control is accomplished by serial bus
microprocessor interface.
The AC signal setting is obtained by resistor networks
andswitches combined with operationalamplifiers.
Thanks to the used BIPOLAR/CMOS Tecnology,
Low Distortion, Low Noise and DC stepping are ob-
tained.
ORDERING NUMBER: TDA7314
WITH LOUDNESS
SDIP24
TDA7314
1/12

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tda7314 Summary of contents

Page 1

... IN 1.25dB STEPS FOR BALANCE AND FADER FACILITIES - INDEPENDENT MUTE FUNCTION ALL FUNCTIONS PROGRAMMABLE VIA SE- RIAL BUS DESCRIPTION The TDA7314 is a volume, tone (bass and treble) balance (Left/Right) and fader (front/rear) processor for quality audio applications in car radio and Hi-Fi systems. PIN CONNECTION (Top view) November 1999 ...

Page 2

... TDA7314 TEST CIRCUIT THERMAL DATA Symbol R Thermal Resistance Junction-pins th j-pins ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Operating Supply Voltage S T Operating Ambient Temperature amb T Storage Temperature Range stg QUICK REFERENCE DATA Symbol Parameter V Supply Voltage S V Max. input signal handling CL THD Total Harmonic Distortion V = 1Vrms f = 1KHz ...

Page 3

... BLOCK DIAGRAM TDA7314 3/12 ...

Page 4

... TDA7314 ELECTRICAL CHARACTERISTICS (refer to the test circuit T 600 , all controls flat ( 1KHz unless otherwise specified) Symbol Parameter SUPPLY V Supply Voltage S I Supply Current S SVR Ripple Rejection INPUT STAGE R Input Resistance II V Clipping Level CL R Output Load resistance L G Min. Input Gain ...

Page 5

... V = 1Vrms 106 1Vrms 0. -20dB V = 1Vrms 0. 0.3Vrms 0. 103 -20dB V - 1.6mA O Figure 2: Loudnessversus Frequency (C = 100nF) LOUD TDA7314 Max. Unit 2.5 Vrms 120 4.5 4 0 ...

Page 6

... TDA7314 Figure 3: Loudness versus External Capacitors LOUDNESS Volume = -40dB All other control flat 220nF, 100nF, 33nF, 10nF, Open, Shorter to Vref loud Figure 5: Signal to Noise Ratio vs. Volume Setting Figure 7: Distortion & Noise vs. Frequency 6/12 Figure 4: Noise vs. Volume/Gain Settings Figure 6: Distortion & Noise vs. Frequency ...

Page 7

... Figure 9: Channel Separation (L R) vs. Frequency Figure 11: Output Clipping Level vs. Supply Voltage Figure 13: Supply Current vs. Temperature Figure 10: Supply Voltage Rejection vs. Frequency Figure 12: Quiescent Current vs. Supply Voltage Figure 14: Bass Resistance vs. Temperature TDA7314 7/12 ...

Page 8

... Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7314 address (the 8th bit of the byte must be 0). The TDA7314 must always acknowledge at the end of each transmitted byte. A sequence of data (N-bytes + acknowledge) A stop condition (P) LSB MSB ...

Page 9

... LSB A0 Speaker Speaker Speaker Speaker TDA7314 FUNCTION 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 0 -10 -20 -30 -40 -50 -60 -70 FUNCTION 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 0 -10 -20 -30 Mute 9/12 ...

Page 10

... TDA7314 Audio Switch MSB For example to select the stereo 1 input with a gain of +12.5dB, loudness on, the 8 bit string is (*) Stereo are connected internally but not available on pins. Bass and Treble Sign ...

Page 11

... D 22.61 22.86 23.11 0.890 0.90 E 7.62 8.64 0.30 E1 6.10 6.40 6.86 0.240 0.252 e 1.778 0.070 e1 7.62 0.30 e2 10.92 e3 1.52 L 2.54 3.30 3.81 0.10 0.130 OUTLINE AND MECHANICAL DATA MAX. 0.20 0.180 0.045 0.910 0.340 0.270 0.430 0.060 SDIP24 (0.300”) 0.150 Stand-off SDIP24 TDA7314 .015 0,38 Gage Plane e3 e2 11/12 ...

Page 12

... TDA7314 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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