STV8225

STV8225 AM SIF CIRCUIT . . . . SOUND AM SYNCHRONOUS DEMODULATOR AM/FM AUDIO SWITCH AV/TV AUDIO SWITCH MUTE INPUT DIP14 (Plastic Package) 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 ORDER CODE : STV8225 IF INPUT AGC CAPACITOR GND LEVEL SWITCH FM SOUND INPUT MUTE INPUT MAIN SOUND OUTPUT 1 2 3 4 5 6 7 14 13 12 11 10 9 8 IF INPUT MEAN CAPACITOR VCC EXTERNAL SOUND INPUT SWITCHING INPUT EXTERNAL SOUND OUTPUT NOT TO BE CONNECTED February 1995 1/6 8225-01.EPS STV8225 BLOCK DIAGRAM Mean Capacitor 13 Level VCC Switch 4 12 STV8225 A B 7 SW1 5 9 SW2 11 6 8225-02.EPS Main Sound Output FM Sound Input External Sound Output External Sound Input 14 IF INPUT 1 LOGIC CONT 3 AGC Capacitor 10 Switching Input MUTE C A AGC 2 Mute Input ABSOLUTE MAXIMUM RATINGS Symbol VCC Tstg Toper Ptot Supply Voltage Storage Temperature Operating Temperature Power Dissipation Parameter Value 13 -40, +150 0, +70 0.35 Unit V o o C W THERMAL DATA Symbol Rth (j-a) Parameter Junction-ambient Thermal Resistance Max. Value 90 Unit o C/W 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 VCC ICC Parameter Supply Voltage Supply Current Supply Voltage Rejection IF AMPLIFIER Ri 1, 14 Ci 1, 14 VIF min VIF max DAV lAGC Input Resistance (Pins 1-14) Input Capacitance (Pins 1-14) Minimum IF Input Signal Maximum IF Input Signal AGC Range Maximum AGC Output Current (Pin 2) IF Bandwidth Resistance between Pin 1 and 14 Capacitance between Pin 1 and 14 IF input signal for VOUT = VNOM - 3dB IF input signal for VOUT = VNOM + 1dB DAV = VIF max / VIF min Charging and discharging -3dB ± 35 2 2 70 75 61 ±50 50 ±65 kΩ pF µVRMS mVRMS dB 8225-03.TBL Test Conditions Pin 12 Pin 12 Pins 9, 7, 12 - VRipple = 0.5VPP, f = 100Hz Min. 8 45 Typ. Max. 9 20 53 10 30 Unit V mA dB µA MHz 2/6 8225-02.TBL 8225-01.TBL C 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 AM DEMODULATOR AF Output Voltage (Pins 7-9) AF Bandwidth (Pins 7-9) Lower Limit Upper Limit Harmonic Distorsion (Pins 7-9) S/N (Pins 7-9) MUTE Threshold Level (Pin 6) Attenuation (Pins 7-9) AUDIO SWITCHES Switching Voltage (Pin 10) Operation mode TV FM TV AM AV AM AV FM V10 8225-03.EPS Parameter Test Conditions Min. Typ. Max. Unit Level switch (Pin 4) open Level switch (Pin 4) connected to GND -3dB versus nominal signal 200 400 250 500 300 600 40 mVRMS mVRMS Hz kHz % dB 50 THD + Noise Weighted according to CCIR 468-4 0.7 55 1.8 Mute mode if voltage below threshold Level switch (Pin 4) connected to GND TV - AM mode 0.2 80 0.3 96 0.4 V dB 0V Viev1 Viev2 Viev3 VCC View1 Level 1 (Pin 10) For voltage below this level TV-FM mode : Pin 7 connected to A Pin 9 connected to C For voltage below this level TV-AM mode : Pin 7 connected to A Pin 9 connected to A 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 Source current to B to A to B to C 1.8 2.3 2.6 V View2 Level 2 (Pin 10) 4.1 4.6 4.9 V View3 Level 3 (Pin 10) 6.4 6.8 7.2 V Input Current (Pin 10) Input Dynamic Range (Pins 5-11) Input Resistance (Pins 5-11) Switch Gain Crosstalk Output Resistance (Pins 7-9) Output Current Source (Pins 7-9) Switch Distorsion Output Noise DC Plop at AF Output Pin 0.3 2 35 50 -0.1 85 100 1 0.1 7 10 2 µA VRMS kΩ VIN = 2VRMS, f = 1kHz Pin 7 vs Pin 11 and Pin 9 vs Pin 5 f = 1kHz -0.6 70 70 0.4 dB dB 130 0.5 20 50 Ω mA % µVp mV 8225-04.TBL VIN = 2VRMS, f = 1kHz, THD + Noise, Pin 7 vs Pin 11 and Pin 9 vs Pin 5 Unweighted 3/6 4/6 L7 3.3µ H 47µ F C12 R11 220Ω 10µ F Sound Output 100nF C8 10µ F External Sound Input C11 C9 C10 22µF 14 13 12 11 10 9 8 STV8225 IF2 SOUND SAW FILTER L STD IC1 1 2 3 4 5 6 7 APPLICATION DIAGRAM STV8224 - STV8225 STV8225 L4 3.3µ H C13 10µF Level Switch C23 10µF C22 10µ F IF1 C21 47µ F C20 Tuner AGC Delay 100nF 20 14 13 19 18 17 16 15 24 23 22 21 VIDEO SAW FILTER BGDKL C7 68nF C6 4.7 µF Switched Sound Output R32 10k Ω Tuner AGC Output C18 1 µF P1 10k Ω Mute C19 47nF C16 47µF R14 27k Ω Volume Control C31 100nF SW1 R15 6.8kΩ IC2 9V LC1 C25 1µF C26 100nF 38.9MHz C29 10nF C24 1nF 1 2 3 4 5 6 7 8 9 10 11 12 STV8224 12V R35 Q4 BC337 15 Ω C15 680nF R13 68Ω C14 4.7nF L5 3.3µ H C30 470nF R34 C33 10 µF External CVBS Input R29 75 Ω +9V C27 470nF CVBS Ouput 390Ω 9V DZ1 BZX55C 9V6 R17 100kΩ C32 10nF C28 68pF BFP 5.5MHz CF1 D2 1N4148 AFC Output R21 1.8kΩ R24 4.7kΩ Q3 BC547 R28 4.7kΩ +9V SW4 STD R20 1kΩ R25 2.7k Ω R26 3.9k Ω R19 1k Ω R16 100kΩ Switching Voltage C17 1µ F R10 22Ω BFP 6.5MHz CF2 D1 1N4148 R27 TRAP FILTER (5.5MHz - 6.5MHz) L6 R12 2.2k Ω BC547 Q2 R18 75Ω CVBS Output (to SCART) R22 150Ω 1.8kΩ 8.2µ H CF3 R9 560Ω 8225-06.EPS STV8225 INPUT/OUTPUT PINS CONFIGURATION VCC 12 SC_IN 11 5µA CONTROL 10 125µA 50µA SC_OUT 9 5kΩ VCC 250µA VCC 100Ω 50kΩ 250µA 10µA 1mA C_MEAN 13 50µA VREF 4.3V VREF 4.3V 6.4V 1.3kΩ 8 V6.4 (if used) IF1 14 6.0V 125µA 26kΩ 100Ω 250µA 7 1mA AUDIO 50µA 50kΩ VREF 4.3V 5 FM_IN 10µA IF2 1 1kΩ 1kΩ VCC 4.2V (charge) 5µA IC C_AGC 2 VCC 6V 100µA 2.7V VCC 114kΩ VCC ID (discharge) 3 GND 4 LSW 66kΩ 6 MUTE 5/6 8225-04.EPS STV8225 STV8225 PACKAGE MECHANICAL DATA 14 PINS - PLASTIC DIP Dimensions 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 Inches Typ. Max. 0.065 0.5 0.25 20 8.5 2.54 15.24 7.1 5.1 3.3 1.27 2.54 0.050 0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.100 DIP14.TBL 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 PM-DIP14.WMF