TDA7460N STMicroelectronics, TDA7460N Datasheet
TDA7460N
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TDA7460N Summary of contents
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... HIGH PERFORMANCE SIGNAL PROCES- SOR NO EXTERNAL COMPONENTS REQUIRED 2 FULLY PROGRAMMABLE VIA I C BUS LOW DISTORTION LOW NOISE DESCRIPTION The TDA7460N is a high performance signal processor specifically designed for car radio ap- plications. The device includes a complete audioprocessor and a stereo decoder with noiseblanker, ...
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... TDA7460N ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Operating Supply Voltage S T Operating Ambient Temperature Range amb T Storage Temperature Range stg SUPPLY Symbol Parameter V Supply Voltage S I Supply Current S SVRR Ripple Rejection @ 1KHz ESD All pins are protected against ESD according to the MIL883 standard. ...
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... Left Rear Speaker Output 18 OUTRF Right Front Spaeaker Output 19 OUTLF Left Front Speaker Output 20 CREF Reference Capacitor Pin (1) See input configuration tree and databyte specification ”configuration” Pin type legenda Input O = Output I/O = Input/Output S = Supply TDA7460N Function Type ...
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... TDA7460N AUDIO PROCESSOR PART Input Multiplexer Fully differential or quasi-differential CD and cassette stereo input AM mono or stereo input Phone differential or single ended input Internal beep with 2 frequencies (selectable) Mixable phone and beep signals Loudness First or second order frequency response Programmable center frequency and quality factor ...
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... Source -5 Source -10 Beep/Phone -1 19 -83 0 -20 to 20dB -1. -60 to 20dB -4 Adjacent Attenuation Steps -3 From 0dB MIN 0.5 -16 180 360 60 T1 0. 40.4 T4 200 2 TDA7460N Max. Unit 350 500 mV 600 630 Hz 1.2 1.25 KHz -12 - - 1.25 ...
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... TDA7460N ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter BASS CONTROL C Control Range RANGE A Step Resolution STEP f Center Frequency C Q Quality Factor BASS DC Bass-Dc-Gain GAIN TREBLE CONTROL C Control Range RANGE A Step Resolution STEP f Center Frequency C SPEAKER ATTENUATORS C Control Range RANGE A Step Resolution STEP ...
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... DESCRIPTION OF THE AUDIOPROCESSOR PART Programmable Input Matrix The programmable input matrix of the TDA7460N offers several possibilities to adapt the audioproc- essor to the desired application the stand- ard application we have: CD quasi differential Cassette stereo Phone differential AM mono Stereodecoder input. The input matrix can be configured by only 2 bits: Figure 1 ...
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... Here you will find the special pinout as well as the special program- ming codes for selecting sources. For example in Appl. 6 the TDA7460N has to be configured while startup with the databyte 0/xxxx0xxx. To select the FM phone source the last ...
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... STEREODECODER D97AU633A Figure 3. Loudness Attenuation @ fc = 400Hz (second order) 0.0 -5.0 -10.0 -15.0 -20.0 10.0 100.0 Figure 4. Loudness Center frequency @ Attn. = 15dB (second order) 0.0 -5 -10.0 -15.0 C bus out- -20.0 10.0 100.0 TDA7460N IN GAIN 1.0K 10.0K 1.0K 10.0K 9/31 ...
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... TDA7460N Figure 5. Loudness @ Attn. = 15dB 400Hz (dB) -5 -10 -15 -20 10 100 1,000 Softstep Volume When volume level is changed often an audible click appears at the output. The root cause of those clicks could be either a DC offset before the volume stage or the sudden change of the envelope of the audio signal. With the Softstep feature both kinds of clicks could be reduced to a minimum and are no more audible (see figure 7) ...
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... Figure 11. Bass normal and DC Mode @ Gain = 14dB 80Hz 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 100.0 Note: In general the center frequency, Q and DC-mode can be set 10.0K independent l y. The exception from this rule is the mode (5/xx1111xx) where the center frequency is set to 150Hz instead of 100Hz. Figure 13. Treble Center Frequencies @ Gain = 14dB 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0K 10.0 100.0 TDA7460N 1.0K 10.0K 1.0K 10.0K 1.0K 10.0K 11/31 ...
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... TDA7460N STEREODECODER PART No external components necessary PLL with adjustment free fully integrated VCO Automatic pilot dependent MONO/STEREO switching Very high suppression of intermodulation and interference Programmable Roll-Off compensation ELECTRICAL CHARACTERISTICS (V 75KHz deviation 1KHz 6dB Symbol Parameter V MPX Input Level IN R Input Resistance ...
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... TDA7460N Max. Unit 46 %REF5V 70 %REF5V 12 %REF5V 21 %VHCH 37 %VHCH 13/31 ...
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... TDA7460N NOISE BLANKER PART internal 2nd order 140kHz high pass filter programmable trigger threshold additional circuits for trigger adjustment (devia- ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Trigger Threshold meas. with Noise Controlled Trigger meas. with V TRNOISE 2) Threshold V Rectifier Voltage V RECT ...
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... Figure 15. Deviation Controlled Trigger Adjustment V PEAK ( 2.8 2.0 1.2 0.9 20 D97AU649 Figure 16. Fieldstrength Controlled Trigger Adjustment V PEAK »3V NOISE noisy signal NOISE CONTROLLED TRIG. THRESHOLD V PEAK(V) 0.9V 1.5V D97AU648 DETECTOR OFF (11) DEVIATION(KHz) 32 MONO STEREO 2.3V(00) 1.8V(01) 1.3V(10) ATC_SB OFF (11) good signal D98AU863 TDA7460N 260mV(00) 220mV(01) 180mV(10) 140mV(11) 0.9V E’ 15/31 ...
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... TDA7460N MULTIPATH DETECTOR Internal 19kHz bandpass filter Programmable bandpass and rectifier gain ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter f Center frequency of Multipath- CMP Bandpass G Bandpass Gain BPMP G Rectifier Gain RECTMP I Rectifier Charge Current CHMP I Rectifier Discharge Current DISMP Figure 17. Block diagram of the stereodecoder ...
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... IF devices. Stereodecoder Mute The TDA7460N has a fast and easy to control RDS mute function which is a combination of the audioprocessor softmute and the high-ohmic mute of the stereodecoder. If the stereodecoder is selected and a softmute command is sent (or ...
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... TDA7460N by reading the status byte of the TDA7460N via I2C bus. Fieldstrength Control The fieldstrength input is used to control the high cut and the stereoblend function. In addition the signal can be also used to control the noise- blanker thresholds. LEVEL Input and Gain To suppress undesired high frequency modula- tion on the highcut and stereoblend function the LEVEL signal is lowpass filtered firstly ...
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... If the MPX signal is noisy the PEAK voltage in- creases due to the higher noise, which is also rectified. With increasing of the PEAK voltage the trigger threshold increases, too. This particular gain is programmable in 4 steps (see fig. 14). RECT + MONOFLOP - VTH + THRESHOLD GENERATOR PEAK LOWPASS + ADDITIONAL THRESHOLD CONTROL D98AU861 TDA7460N HOLDN 19/31 ...
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... TDA7460N Automatic Threshold Control Besides the noise controlled threshold adjust- ment there is an additional possibility for influenc- ing the trigger threshold depending on the stereoblend control. The point where the MPX signal starts to become noisy is fixed by the RF part. Therefore also the starting point of the normal noise-controlled trig- ger adjustment is fixed (fig ...
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... SDA SCL SMUTE LEVEL GND D97AU643A 10 F CREF OUTLF OUTRF OUTLR OUTRR TDA7460 220nF MPX 220nF AM SDA SCL SMUTE LEVEL GND D97AU645A TDA7460N OUTLF OUTRF OUTLR OUTRR MPX AM SDA SCL SMUTE LEVEL OUTLF OUTRF OUTLR OUTRR MPX AM SDA SCL SMUTE LEVEL 21/31 ...
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... TDA7460N BUS INTERFACE DESCRIPTION Interface Protocol The interface protocol comprises: -a start condition (S) -a chip address byte (the LSB bit determines read CHIP ADDRESS MSB LSB MSB R/W ACK X D97AU627 S = Start ACK = Acknowledge AZ = AutoZero-Remain T = Testing I = Autoincrement P = Stop MAX CLOCK SPEED 500kbits/s The transmitted data is automatically updated af- ter each ACK ...
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... AM through Stereodecoder FM- Stereodecoder In-Gain 14dB 12dB : LSB LOUDNESS Attenuation 0dB -1dB : : : : -14dB -15dB Filter on off (flat) Center Frequency 200Hz 400Hz Loud ness Q st low (1 order) nd normal (2 order) must be ”1” TDA7460N 23/31 ...
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... TDA7460N Mute, Beep and Mixing MSB Note: for more information to the Stereodecoder -Softmute-Influence please refer to the stereodecoder description. Volume MSB ...
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... Center Frequency = 12.5 KHz Center Frequency = 15 KHz 1 1 Center Frequency = 17.5 KHz Bass 0 Center Frequency = Center Frequency = Center Frequency = Center Frequency = 100Hz 1 Center Frequency = 150Hz Quality factor = 1 Quality factor = 1.25 Quality factor = 1.5 Quality factor = 2 DC-Gain = 0dB DC-Gain = 4.4dB must be ”1” TDA7460N 25/31 ...
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... TDA7460N Speaker Attenuation (LF, LR, RF, RR) MSB 26/31 LSB Attenuation 0dB -1dB : : : : -23dB -24.5dB ...
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... Low Threshold 35mV Low Threshold 30mV Noise Controlled Threshold 320mV Noise Controlled Threshold 260mV Noise Controlled Threshold 200mV Noise Controlled Threshold 140mV Noise blanker OFF Noise blanker ON Over deviation Adjust 2.8V Over deviation Adjust 2.0V Over deviation Adjust 1.2V Over deviation Detector OFF TDA7460N 27/31 ...
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... TDA7460N Fieldstrength Control MSB Configuration MSB 28/31 LSB FUNCTION Noiseblanker Field strength Adj 2. Noiseblanker Field strength Adj 1. Noiseblanker Field strength Adj 1.3V ...
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... VCOCON; VCO Control Voltage 0 Pilot threshold HOLDN threshold 1 F228 VHCCL 0 1 VSBL 0 not used 1 not used 0 PEAK 1 not used 0 REF5V 1 not used VCO OFF ON Audioprocessor test mode only if bit D5 of the subaddress (test mode bit) is set to ”1” OFF TDA7460N 29/31 ...
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... TDA7460N mm inch DIM. MIN. TYP. MAX. MIN. TYP. A 2.35 2.65 0.093 A1 0.1 0.3 0.004 B 0.33 0.51 0.013 C 0.23 0.32 0.009 D 12.6 13 0.496 E 7.4 7.6 0.291 e 1.27 0.050 H 10 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0 (min.)8 (max 30/31 OUTLINE AND MECHANICAL DATA MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.419 0.030 0.050 SO20 ...
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... The ST logo is a registered trademark of STMicroelectronics 2000 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 TDA7460N 31/31 ...