TDA7400D STMicroelectronics, TDA7400D Datasheet
TDA7400D
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TDA7400D Summary of contents
Page 1
... MULTIPATH DETECTOR PROGRAMMABLE ROLL-OFF COMPENSA- TION NO EXTERNAL COMPONENTS DESCRIPTION The TDA7400D is the newcomer of the CSP fam- ily introduced by TDA7460/61. It uses the same innovative concepts and design technologies al- lowing fully software programmability through I bus and overall cost optimisation for the system designer. ...
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... TDA7400D 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. ...
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... Left Rear Speaker Output 25 OUTRF Right Front Spaeaker Output 26 OUTLF Left Front Speaker Output 27 ACOUTR Pre-speaker AC Output Right Channel 28 ACOUTL Pre-speaker AC Output Left Channel Pin type legenda Input O = Output I/O = Input/Output S = Supply nc = not connected Function TDA7400D Type ...
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... TDA7400D AUDIO PROCESSOR PART Input Multiplexer Quasi-differential CD and cassette stereo input AM mono input Phone differential input Multiplexer signal after In-Gain available at separate pins Volume control 1dB attenuator Max. gain 15dB Max. attenuation 79dB Bass Control 2nd order frequency response Center frequency programmable in 4(5) steps ...
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... Adjacent Attenuation Steps From 0dB to G MIN off TDA7400D Min. Typ. Max. Unit 0.5 1 1.5 dB -1. 100 dB 0 ...
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... TDA7400D ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter SPEAKER ATTENUATORS R Input Impedance IN G Max Gain MAX A Max Attenuation MAX 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 L C Output Load Capacitance ...
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... Stereo, PTH = 0 for Mono, PTH = 1 for Mono, PTH = 1 Bit 7, Subadr >> V LEVEL HCH Bit 7, Subadr >> V LEVEL HCH Bit 7, Subadr >> V LEVEL HCL Bit 7, Subadr >> V LEVEL HCL TDA7400D Min. Typ. Max. Unit 0.5 1.25 V RMS 70 100 130 K 1.5 3.5 4.5 dB 8.5 11 12.5 dB 1.75 2.5 3 ...
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... TDA7400D ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Carrier and harmonic suppression at the output 19 Pilot Signal f = 19KHz 38 Subcarrier f = 38KHz 57 Subcarrier f = 57KHz Subcarrier f = 76KHz Intermodulation (Note 10KHz 1KHz mod spur 13KHz 1KHz mod spur Traffic Ratio (Note 2) 57 Signal f = 57KHz SCA - Subsidiary Communications Authoorization (Note 3) ...
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... FSC = 00 Signal HOLDN BLT = 00 in Testmode BLT = 10 BLT = 01 BLT = 00 6) Signal PEAK in NRD = 00 Testmode 6) NRD = 01 6) NRD = 10 6) NRD = 11 7) Signal PEAK in PCH = 0 Testmode 7) PCH = 1 TDA7400D Min. Typ. Max. Unit ( ( ( (c) 45 (c) mV ...
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... TDA7400D ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter V Noise Rectifier adjustment ADJMP 8) through Multipath 0) All Thresholds are measured using a pulse with T 1) NBT represents the Noiseblanker Byte bits D 2) NAT represents the Noiseblanker Byte bit pair D 3) OVD represents the Noiseblanker Byte bit pair D ...
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... configuration byte = bits configuration byte = bit D configuration byte = 0 5 bit D configuration byte = 1 5 Test Condition bit D High-Cut byte + 7 bit D Fieldstrength byte + 7 TDA7400D 0.9V E' Min. Typ. Max. Unit 19 KHz 7 off dB 0 ...
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... AutoZero action because no new source is selected and an undesired mute would appear at the outputs. For such applica- tions the TDA7400D could be switched in the "Auto Zero Remain mode" (Bit 6 of the subad- dress byte). If this bit is set to high, the DAT- ABYTE 0 could be loaded without invoking the AutoZero and the old adjustment value remains ...
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... Center Frequency Figure 11 shows the four possible Center Fre- quency (10, 12.5, 15 and 17.5kHz). Speaker Attenuator The speaker attenuators have exactely the same structure and range like the Volume stage. Figure 7. Bass Center @ Gain = 14dB 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0K 10.0 100.0 TDA7400D 1.0K 10.0K 13/28 ...
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... TDA7400D Figure 8. Bass Quality factors @ Gain = 14dB 80Hz 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 100.0 1.0K Figure 10. Treble Control @ fc = 17.5KHz 15.0 10.0 5.0 0.0 -5.0 -10.0 -15.0 10.0 100.0 1.0K 14/28 Figure 9. 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 10.0K Note: In general the center frequency, Q and DC-mode can be set independently. The exception from this rule is the mode (5/xx1111xx) where the center frequency is set to 150Hz instead of 100Hz ...
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... MPX signal like pilot tone depend- ent MONO/STEREO switching as well as "stereoblend" and "highcut" functions. Stereodecoder Mute The TDA7400D has a fast and easy to control RDS mute function which is a combination of the audioprocessor’s 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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... The included detector enables the demodulation if the pilot tone reaches the se- lected pilot tone threshold V thresholds are available. The detector output (sig- nal STEREO, see block diagram) can be checked by reading the status byte of the TDA7400D via bus. Fieldstrength Control The fieldstrength input is used to control the high cut and the stereoblend function ...
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... Therefore they have a temperature coefficient near zero. This is useful if the fieldstrength signal is also temperature compensated. But most IF devices apply a LEVEL voltage with 3300ppm. The TDA7400D offers this TC for the reference voltages, too. The TC is select- able with bit D byte. Highcut Control ...
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... TDA7400D supplied by his own biasing circuit. Trigger Path The incoming MPX signal is highpass filtered, amplified and rectified. This second order high- pass-filter has a corner frequency of 140kHz. The rectified signal, RECT, is lowpass filtered to generate a signal called PEAK. Also noise with a frequency 140kHz increases the PEAK voltage. ...
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... The attack and decay times can be set by the external capacitor value. QUALITY DETECTOR The TDA7400D offers a quality detector output which gives a voltage representing the FM recep- tion conditions. To calculate this voltage the MPX noise and the multipath detector output are summed according to the following formula: Quality = 1 ...
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... TDA7400D 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 ...
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... +15dB +1dB 0dB 0dB 1 -1dB -15dB -16dB : : : : : -78dB -79dB Mute TDA7400D FUNCTION FUNCTION not used configurations 21/28 ...
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... TDA7400D Treble Filter (subaddress 2H) MSB Bass Filter (subaddress 3H) MSB 22/28 LSB Treble Steps -15dB -14dB ...
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... In Gain 8.5dB Gain 6dB others combinations not used 1 must be "1" Forced Mono Mono/Stereo switch automatically Noiseblanker PEAK charge current low Noiseblanker PEAK charge current high Pilot Threshold HIGH Pilot Threshold LOW Deemphasis 50 s Deemphasis 75 s TDA7400D FUNCTION FUNCTION 23/28 ...
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... TDA7400D Noiseblanker (subaddress AH) MSB High Cut (subaddress BH) MSB 24/28 LSB Low Threshold 65mV Low Threshold 60mV Low Threshold 55mV ...
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... R =18k Multipath Detector Bandpass Gain 0 0 6dB 1 0 12dB 0 1 16dB 1 1 18dB Multipath Detector internal influence ON OFF Multipath Detector Charge Current 0.5 A Multipath Detector Charge Current 1 A Multipath Detector Reflection Gain Gain = 7.6dB Gain = 4.6dB Gain = 0dB disabled TDA7400D FUNCTION FUNCTION 25/28 ...
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... TDA7400D Stereodecoder Adjustment (subaddress EH) MSB Testing (subaddress FH) MSB Note : This byte is used for testing or evaluation purposes only and must not be set to other values than the default "11111110" in the application! ...
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... DIM. MIN. TYP. MAX. MIN. A 2.65 a1 0.1 0.3 0.004 b 0.35 0.49 0.014 b1 0.23 0.32 0.009 C 0 (typ.) D 17.7 18.1 0.697 E 10 10.65 0.394 e 1.27 e3 16.51 F 7.4 7.6 0.291 L 0.4 1.27 0.016 S 8 (max.) inch OUTLINE AND MECHANICAL DATA TYP. MAX. 0.104 0.012 0.019 0.013 0.020 0.713 0.419 0.050 0.65 0.299 0.050 TDA7400D SO28 27/28 ...
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... TDA7400D 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. Specifications mentioned in this publication are subject to change without notice ...