TDA7400 ST Microelectronics, TDA7400 Datasheet
TDA7400
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TDA7400 Summary of contents
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... 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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... TDA7400 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 TDA7400 Type ...
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... TDA7400 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 DC gain programmable ...
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... Adjacent Attenuation Steps From 0dB to G MIN off TDA7400 Min. Typ. Max. Unit 0.5 1 1.5 dB -1. 100 dB 0 ...
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... TDA7400 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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... LEVEL HCH Bit 7, Subadr >> V LEVEL HCH Bit 7, Subadr 100 V >> V LEVEL HCL Bit 7, Subadr 150 V >> V LEVEL HCL 2.2 TDA7400 Typ. Max. Unit 0.5 1.25 V RMS 100 130 K 3.5 4 12.5 dB 2.5 3. 0.02 0 ...
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... TDA7400 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 TDA7400 Min. Typ. Max. Unit ( ( ( (c) 45 (c) mV ...
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... TDA7400 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 NAT represents the Noiseblanker Byte bit pair D 3) OVD represents the Noiseblanker Byte bit pair D ...
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... configuration byte = bit D configuration byte = 0 5 bit D configuration byte = 1 5 Test Condition Min. bit D High-Cut byte + 00 7 bit D Fieldstrength byte + TDA7400 0.9V E’ 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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... The speaker attenuators have exactely the same structure and range like the Volume stage. FUNCTIONAL DESCRIPTION OF STEREODE- CODER The stereodecoder part of the TDA7400D (see Fig. 12) contains all functions necessary to de- modulate the MPX signal like pilot tone depend- ent MONO/STEREO switching as well as ” ...
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... 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 Stereodecoder Mute The TDA7400D has a fast and easy to control RDS mute function which is a combination of the 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 independent l y. 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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... TDA7400D offers an I2C bus programmable roll- off adjustment which is able to compensate the lowpass behaviour of the tuner section. If the tuner attenuation at 38kHz range from 13.8% to 24.6% the TDA7400D needs no exter- nal network in front of the MPX pin. Within this range an adjustment to obtain at least 40dB channel separation is possible. ...
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... V . Two different PTHST 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 of the ”stereodecoder adjustment” ...
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... TDA7400 PEAK+VTH are fed to a comparator which trig- gers a re-triggerable monoflop. The monoflop’s output activates the sample-and-hold circuits in the signalpath for selected duration. Automatic Noise Controlled Threshold Adjust- ment (ATC) There are mainly two independent possibilities for programming the trigger threshold: ...
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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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... TDA7400 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. Transmission can be repeated without new chip address. SUBADDRESS (receive mode) MSB ...
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... Coupl. Front Speaker external internal LSB not used configurations +15dB : : : : 1 +1dB 0dB 0dB 0 1 -1dB -15dB -16dB : : : : -78dB -79dB Mute TDA7400 FUNCTION FUNCTION 21/28 ...
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... TDA7400 Treble Filter (subaddress 2H) MSB Bass Filter (subaddress 3H) MSB 22/28 LSB Treble Steps -15dB -14dB : : : : -1dB ...
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... In Gain 8.5dB Gain 6dB others combinations not used 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 TDA7400 FUNCTION FUNCTION 23/28 ...
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... TDA7400 Noiseblanker (subaddress AH) MSB High Cut (subaddress BH) MSB 24/28 LSB Low Threshold 65mV Low Threshold 60mV ...
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... R = 33k =18k Multipath Detector Bandpass Gain 0 6dB 0 12dB 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 TDA7400 FUNCTION FUNCTION 25/28 ...
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... TDA7400 Stereodecoder Adjustment (subaddress EH) MSB Testing (subaddress FH) MSB ...
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... C 0.09 0.20 0.004 D 12.00 0.472 D1 10.00 0.394 D3 8.00 0.315 e 0.80 0.031 E 12.00 0.472 E1 10.00 0.394 E3 8.00 0.315 L 0.45 0.60 0.75 0.018 0.024 L1 1.00 0.039 K (min.), 3.5 (typ.), 7 (max OUTLINE AND MAX. MECHANICAL DATA 0.063 0.006 0.057 0.018 0.008 0.030 TQFP44 ( Seating Plane TQFP4410 TDA7400 0.10mm .004 C 27/28 ...
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... TDA7400 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 ...