Document
TDA8192
MULTISTANDARD AM AND FM SOUND IF CIRCUIT FOR TV
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A 2-STAGE GAIN CONTROLLED AMPLIFIER, PROVIDING COMPLETE IF GAIN ; (AM SECTION) A PEAK DETECTOR AND INTEGRATION WHICH PROVIDES AGC-VOLTAGE ; (AM SECTION) A 6-STAGE LIMITING AMPLIFIER FOLLOWED BY A SYNCHRONOUS DEMODULATOR AND DEEMPHASIS NETWORK ; (FM SECTION) AN AUDIO PREAMPLIFIER A CIRCUIT PROVIDING AM/FM SWITCHING AND MUTE FACILITIES AN EXTERNAL AUDIO INPUT CIRCUIT WITH SWITCHING FACILITIES TO DELIVER EITHER THE DEMODULATED IF, OR THE EXTERNAL AUDIO SIGNAL AT THE OUTPUT FULLY COMPATIBLE WITH THE SCART EUROPEAN NORM EN50 049 A DC CONTROLLED VOLUME CIRCUIT
DIP20 (Plastic Package) ORDER CODE : TDA8192
DESCRIPTION The demodulated IF signal is always available at a low impedance output. PIN CONNECTIONS
IF/AM INPUT AMPLIFIED AGC (BYPASS) 1st STAGE OUTPUT AM/FM SWITCH 2nd STAGE INPUT 2nd STAGE OUTPUT AGC BYPASS REFERENCE VOLTAGE (+6V) VOLUME CONTROL INPUT AUDIO OUTPUT (0 to 1 V RMS)
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
GND FM INPUT FM INPUT (BYPASS) 5.5MHz TUNED CIRCUIT DEEMPHASIS CAPACITOR MUTE SWITCH SCART AUDIO OUTPUT SCART SWITCH SCART AUDIO INPUT POWER SUPPLY (+12V)
8192-01.EPS
October 1993
1/5
TDA8192
BLOCK DIAGRAM
1st STAGE OUTPUT
3
2nd STAGE INPUT
5
2nd STAGE OUTPUT
6
SCART AUDIO INPUT
12
IF/AM INPUT 1 AMPLIFIED 2 AGC (BYPASS)
FIRST AM STAGE
2nd AM STAGE
AM DEMOD
VOLUME CONTROL
10
AUDIO OUTPUT VOLUME
9 CONTROL
INPUT AGC BYPASS 7
AGC
13
SCART SWITCH POWER SUPPLY
11
FM INPUT 19 FM INPUT 18 (BYPASS)
FM LIMITER
FM DEMOD
MUTE REFERENCE VOLTAGE
8192-02.EPS
8 17 16
4
15
14
20
5.5MHz TUNED CIRCUIT
DEEMPHASIS CAPACITOR
AM/FM MUTE SWITCH SWITCH
SCART AUDIO OUTPUT
GND
ABSOLUTE MAXIMUM RATINGS
Symbol VS Ptot Top Tstg, Tj Supply Voltage Total Power Dissipation at Tamb ≤ 70°C Operating Temperature Storage and Junction Temperature Parameter Value 16 800 0 to 70 – 55 to 150 Unit V °C °C
8192-01.TBL 8192-02.TBL
mW
THERMAL DATA
Symbol R th j-amb Parameter Thermal Resistance Junction-ambient Max. Value 100 Unit °C/W
2/5
TDA8192
ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VS = 12V unless otherwise specified)
Symbol Vs Id Parameter Supply Voltage Supply Current Test Conditions Vi = 0 AM FM Min. 10.8 Typ. 12 30 30 35 36 50 56 66 1 Max. 13.2 Unit V mA mA µV dB
AM SECTION (fi = 39.2MHz, Vi = 1mV, m = 0.8, fm = 1kHz unless otherwise specified) Vi S+N Input Sensitivity Signal to Noise Ratio S/N = 26dB Vi = 0.1mV m = 0.3 Vi = 1mV Vi = 10mV ∆VOUT = – 1 to + 1dB
N
Vi Vo d d Ri Ci Vi AMR S+N AGC Range Recovered Audio Signal Distortion (1) Distortion (2) Input Resistance between Pins 1 and 2 Input Capacitance between Pins 1 and 2 Input Limiting Voltage Amplitude Modulation Signal to Noise Ratio Distortion (3) Distortion (4) Recovered Audio Signal Input Resistance Input Capacitance Crosstalk AM/FM FM ”on” (pin. 4) AM ”on” (pin 4) Mute ”on” (pin 15) Mute ”off” (pin 15) Signal Attenuation for Mute ”off” Mute Switch Current AM/FM Switch Current SCART SWIT.