TDA7403 ST Microelectronics, TDA7403 Datasheet
TDA7403
Available stocks
Related parts for TDA7403
TDA7403 Summary of contents
Page 1
... NO EXTERNAL COMPONENTS REQUIRED 2 FULLY PROGRAMMABLE VIA I LOW DISTORTION AND NOISE DESCRIPTION The TDA7403 is a high performance signal proc- essor specifically designed for car radio applica- tions focused on the low-end market. The device includes a complete audioprocessor and a stereo decoder with noiseblanker. Switched-capacitors design technique allows to obtain all these features without external compo- nents or adjustments ...
Page 2
... TDA7403 ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage S T Operating Ambient Temperature Range amb T Operating 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. ...
Page 3
... 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 Function TDA7403 Type I/O I ...
Page 4
... TDA7403 AUDIO PROCESSOR PART Input Multiplexer MPX input Cassette stereo input AM mono or stereo 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 15 x 1dB steps Selectable flat-mode (constant attenuation) ...
Page 5
... Test Condition G = -20 to 20dB G = -60 to 20dB Adjacent Attenuation Steps From 0dB to G MIN ( off TDA7403 Min. Typ. Max. Unit -1. ...
Page 6
... TDA7403 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter TREBLE CONTROL C Control Range RANGE A Step Resolution STEP f Center Frequency C SPEAKER ATTENUATORS C Control Range RANGE A Step Resolution STEP A Output Mute Attenuation MUTE E Attenuation Set Error Steps DC AUDIO OUTPUTS V Clipping Level CLIP R Output Load Resistance ...
Page 7
... AutoZero action because no new source is selected and an undesired mute would appear at the outputs. For such applica- tions the TDA7403 could be switched in the ”Auto Zero Remain” mode (Bit 6 of the subaddress byte). If this bit is set to high, the DATABYTE 0 could be loaded without invoking the AutoZero and the old adjustment value remains ...
Page 8
... TDA7403 Figure 4. Loudness @ Attn. = 15dB 400Hz (dB) -5 -10 -15 -20 10 100 1,000 Softmute The digitally controlled softmute stage allows muting/demuting the signal with a I grammable slope. The mute process can either be activated by the softmute pin or by the I bus. The slope is realized in a special S shaped curve to mute slow in the critical regions (see fig- ure 5) ...
Page 9
... Figure 10. 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 12. 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 TDA7403 1.0K 10.0K 1.0K 10.0K 1.0K 10.0K 9/26 ...
Page 10
... TDA7403 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 ...
Page 11
... ACI ( Adjacent Channel Interference ) measured with: 90% mono signal; 9% pilot signal; fm =1kHz; 1% spurious signal ( fs = 110kHz or 186kHz, unmodulated). Test Condition Min 19KHz f = 38KHz f = 57KHz f = 76KHz f = 10KHz 1KHz; mod spur f = 13KHz 1KHz; mod spur f = 57KHz f = 67KHz f = 114KHz f = 190KHz TDA7403 Typ. Max. Unit 42 %REF5V 66 %REF5V 8.4 %REF5V 17 %VHCH 33 %VHCH ...
Page 12
... TDA7403 NOISE BLANKER PART internal 2nd order 140kHz high pass filter programmable trigger threshold ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Trigger Threshold TR V Noise Controlled Trigger TRNOISE 2) Threshold V Rectifier Voltage RECT V deviation dependent RECT DEV 3) rectifier Voltage V Fieldstrength Controlled RECT FS 4) ...
Page 13
... NOISE DEVIATION(KHz) noisy signal DEMODULATOR INFILTER - PLOT CANC - ROLL-OFF COMP 25KHz PLL + PILOT-DET. SB CONTROL F19 F38 STEREO LEVEL INTERN HOLDN TDA7403 260mV(00) 220mV(01) 180mV(10) 140mV(11) V PEAK(V) MONO STEREO 2.3V(00) 1.8V(01) 1.3V(10) 0.9V ATC_SB OFF (11) good signal E’ D98AU863 DEEMPHASIS FM_L + HIGHCUT t= FM_R ...
Page 14
... IF devices. Stereodecoder Mute The TDA7403 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 ...
Page 15
... TDA7403 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 ...
Page 16
... TDA7403 Highcut Control The highcut control setup is similar to the stereoblend control setup : the starting point VHCH can be set with 2 bits to be 42, 50 66% of REF5V whereas the range can be set 33% of VHCH (see fig. 20). Figure 20. Highcut characteristics LOWPASS TIME CONSTANT ...
Page 17
... The internal signals available are shown in the software specification. CREF S OUTLF OUTRF OUTLR OUTRR SDA SCL SMUTE LEVEL GND TDA7403 During this 10 F OUTLF OUTRF OUTLR OUTRR SDA SCL SMUTE LEVEL D98AUxx5 17/26 ...
Page 18
... TDA7403 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 R/W ACK 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 ...
Page 19
... AM through Stereo/Decoder FM- Stereo/Decoder In-Gain 14dB 12dB : LSB 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” TDA7403 FUNCTION LOUDNESS 19/26 ...
Page 20
... TDA7403 Mute, Beep and Mixing MSB Note: for more information to the Stereodecoder -Softmute-Influence please refer to the stereodecoder description. Volume MSB ...
Page 21
... Center Frequency = 12.5 KHz 1 0 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” TDA7403 21/26 ...
Page 22
... TDA7403 Speaker Attenuation (LF, LR, RF, RR) MSB Stereodecoder MSB 22/26 LSB D2 D1 ...
Page 23
... VSBL at 33% REF 5V 1 VSBL at 42% REF 5V 0 VSBL at 50% REF 5V 1 VSBL at 58% REF 5V VHCH at 42% REF 5V VHCH at 50% REF 5V VHCH at 58% REF 5V VHCH at 66% REF 5V VHCL at 17% VHCH VHCL at 33% VHCH High cut OFF High cut ON TDA7403 FUNCTION FUNCTION 23/26 ...
Page 24
... TDA7403 Stereodecoder Adjustment MSB Testing MSB ...
Page 25
... 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 OUTLINE AND MECHANICAL DATA MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.419 0.030 0.050 TDA7403 SO20 SO20MEC 25/26 ...
Page 26
... TDA7403 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 ...