STV8225 AM SIF CIRCUIT .. .. SOUND AM SYNCHRONOUS DEMODULATOR AM/FM AUDIO SWITCH AV/TV AUDIO SWITCH MUTE INPUT DIP14 (Plastic Package) ORDER CODE : STV8225 DESCRIPTION The STV8225 is intended for the demodulation of the AM sound of the L standard. Used as an add on to the STV8224 it permits to design a multistandard set with the needed switches for one SCART plug. PIN CONNECTIONS 1 14 IF INPUT AGC CAPACITOR 2 13 MEAN CAPACITOR GND 3 12 VCC LEVEL SWITCH 4 11 EXTERNAL SOUND INPUT FM SOUND INPUT 5 10 SWITCHING INPUT MUTE INPUT 6 9 EXTERNAL SOUND OUTPUT MAIN SOUND OUTPUT 7 8 NOT TO BE CONNECTED 8225-01.EPS IF INPUT February 1995 1/6 STV8225 BLOCK DIAGRAM Level VCC Switch Mean Capacitor 13 4 12 STV8225 A B 7 Main Sound Output 5 FM Sound Input 9 External Sound Output 11 External Sound Input SW1 14 IF INPUT MUTE 1 C A SW2 2 3 AGC Capacitor 10 6 Switching Input Mute Input 8225-02.EPS LOGIC CONT AGC ABSOLUTE MAXIMUM RATINGS Parameter Value Supply Voltage VCC Tstg Storage Temperature Toper Operating Temperature Ptot Power Dissipation Unit 13 V -40, +150 o C 0, +70 o C 0.35 W 8225-01.TBL Symbol Symbol Parameter Value Junction-ambient Thermal Resistance Rth (j-a) Max. Unit o 90 C/W 8225-02.TBL THERMAL DATA ELECTRICAL CHARACTERISTICS (VCC = 9V, VIN = 10mVRMS, fSC = 32.4MHz, fM = 1kHz, m = 54% modulation depth, Audio BW = 40Hz to 15kHz, Tamb = 25oC, unless otherwise specified) Symbol Parameter Test Conditions VCC Supply Voltage Pin 12 ICC Supply Current Pin 12 Supply Voltage Rejection Pins 9, 7, 12 - VRipple = 0.5VPP, f = 100Hz Min. 8 45 Typ. Max. Unit 9 10 V 20 30 mA 53 dB Ri 1, 14 Input Resistance (Pins 1-14) Resistance between Pin 1 and 14 2 kΩ Ci 1, 14 Input Capacitance (Pins 1-14) Capacitance between Pin 1 and 14 2 pF VIF min Minimum IF Input Signal IF input signal for VOUT = VNOM - 3dB 70 µVRMS VIF max Maximum IF Input Signal IF input signal for VOUT = VNOM + 1dB 75 mVRMS DAV AGC Range DAV = VIF max / VIF min 61 dB lAGC Maximum AGC Output Current (Pin 2) Charging and discharging IF Bandwidth -3dB 2/6 ±35 ±50 50 ±65 µA MHz 8225-03.TBL IF AMPLIFIER STV8225 ELECTRICAL CHARACTERISTICS (continued) (V CC = 9V, VIN = 10mVRMS, fSC = 32.4MHz, fM = 1kHz, m = 54% modulation depth, Audio BW = 40Hz to 15kHz, Tamb = 25oC, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. 200 400 250 500 Unit AM DEMODULATOR AF Output Voltage (Pins 7-9) Level switch (Pin 4) open Level switch (Pin 4) connected to GND AF Bandwidth (Pins 7-9) Lower Limit Upper Limit -3dB versus nominal signal Harmonic Distorsion (Pins 7-9) THD + Noise 0.7 S/N (Pins 7-9) Weighted according to CCIR 468-4 55 Threshold Level (Pin 6) Mute mode if voltage below threshold 0.2 0.3 Attenuation (Pins 7-9) Level switch (Pin 4) connected to GND TV - AM mode 80 96 300 600 mVRMS mVRMS 40 Hz kHz 1.8 % 50 dB MUTE 0.4 V dB AUDIO SWITCHES Operation mode Viev1 Viev2 Viev3 VCC V10 View1 Level 1 (Pin 10) For voltage below this level TV-FM mode : Pin 7 connected to A Pin 9 connected to C 1.8 2.3 2.6 V View2 Level 2 (Pin 10) For voltage below this level TV-AM mode : Pin 7 connected to A Pin 9 connected to A 4.1 4.6 4.9 V View3 Level 3 (Pin 10) For voltage below this level AV-AM mode : Pin 7 connected Pin 9 connected For voltage above this level AV-FM mode : Pin 7 connected Pin 9 connected 6.4 6.8 7.2 V 0.3 2 Input Current (Pin 10) to B to A to B to C Source current Input Dynamic Range (Pins 5-11) 2 Input Resistance (Pins 5-11) 35 50 Switch Gain VIN = 2VRMS, f = 1kHz Pin 7 vs Pin 11 and Pin 9 vs Pin 5 -0.6 -0.1 Crosstalk f = 1kHz 70 85 70 100 Output Resistance (Pins 7-9) Output Current Source (Pins 7-9) VIN = 2VRMS, f = 1kHz, THD + Noise, Pin 7 vs Pin 11 and Pin 9 vs Pin 5 Output Noise Unweighted DC Plop at AF Output Pin kΩ 0.4 0.1 dB dB 130 1 Switch Distorsion µA VRMS Ω mA 0.5 % 7 20 µVp 10 50 mV 3/6 8225-04.TBL 0V AV FM AV AM TV AM TV FM 8225-03.EPS Switching Voltage (Pin 10) 4/6 8225-06.EPS AFC Output 12V Tuner AGC Output R15 6.8kΩ 9V R16 100kΩ R17 100kΩ 390Ω R34 15Ω R35 C16 47µF C17 1µF 9V C33 10µF DZ1 BZX55C 9V6 Q4 BC337 R14 27kΩ Switching Voltage R13 68Ω C15 680nF P1 10kΩ 1 24 VIDEO SAW FILTER BGDKL IF1 Tuner AGC Delay SOUND SAW FILTER L STD IF2 C32 10nF C14 4.7nF 2 23 3 22 L5 3.3µH C18 1µF 4 21 R22 150Ω LC1 IC2 6 19 68pF C28 100nF C20 47µF C21 BFP 6.5MHz CF2 BFP 5.5MHz CF1 D2 C25 1µF 1N4148 D1 1N4148 7 12 8 17 3 10 9 8 R27 10 15 5 C26 100nF R25 2.7kΩ R24 4.7kΩ 1.8kΩ R20 1kΩ 1.8kΩ R21 C24 1nF 9 16 Level Switch 4 6 C22 10µF SW4 STD R28 4.7kΩ 12 13 7 8.2µH Mute CF3 TRAP FILTER (5.5MHz - 6.5MHz) L6 R26 3.9kΩ Q3 BC547 +9V 11 14 C7 68nF C23 10µF STV8225 SW1 C27 470nF R12 2.2kΩ BC547 R9 560Ω Q2 75Ω R18 R10 22Ω +9V 470nF C30 Switched Sound Output Sound Output External Sound Input R19 1kΩ R29 75Ω CVBS Output (to SCART) CVBS Ouput External CVBS Input Volume Control R32 10kΩ C31 100nF 4.7µF C6 10µF 220Ω 11 C8 R11 C12 100nF 10µF C9 47µF C11 IC1 C10 22µF STV8224 18 2 1 38.9MHz 5 20 C29 10nF C19 47nF 3.3µH L4 13 14 C13 10µF 3.3µH L7 STV8225 APPLICATION DIAGRAM STV8224 - STV8225 STV8225 INPUT/OUTPUT PINS CONFIGURATION CONTROL SC_OUT 11 10 9 5µA 5kΩ VCC 250µA VCC 125µA SC_IN 12 50µA VCC C_MEAN 13 50µA 1mA 250µA VREF 4.3V VREF 4.3V 10µA 50kΩ 100Ω 8 V6.4 (if used) 7 AUDIO 1.3kΩ 6.4V IF1 14 26kΩ 125µA 1kΩ 1 1kΩ IF2 6.0V VCC 4.2V 5µA (charge) 1mA 250µA 100Ω IC 50µA VREF 4.3V (discharge) 3 4 5 6 GND LSW FM_IN MUTE STV8225 8225-04.EPS ID 10µA 66kΩ 50kΩ VCC 6V 2.7V VCC 114kΩ 2 100µA C_AGC VCC 5/6 STV8225 PM-DIP14.WMF PACKAGE MECHANICAL DATA 14 PINS - PLASTIC DIP a1 B b b1 D E e e3 F i L Z Min. 0.51 1.39 Millimeters Typ. Max. 1.65 Min. 0.020 0.055 0.5 0.25 Inches Typ. 0.065 0.020 0.010 20 0.787 8.5 2.54 15.24 0.335 0.100 0.600 7.1 5.1 0.280 0.201 3.3 1.27 Max. 0.130 2.54 0.050 0.100 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without noti ce. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1995 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system confo rms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 6/6 DIP14.TBL Dimensions