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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 k pF VRMS 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
A MHz
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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
A VRMS k
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
mA % Vp 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 3.3H 47F C12 R11 220 10F Sound Output 100nF C8 10F External Sound Input C11 C9 C10 22F
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
C13 10F L4 3.3H C6 Level Switch C23 10F C22 10F
IF1 C21 47F C20 Tuner AGC Delay 100nF
20 14 13 19 18 17 16 15 24 23 22 21
VIDEO SAW FILTER BGDKL C7 68nF
4.7F
Switched Sound Output R32 10k
Tuner AGC Output C18 1F C19 47nF Mute P1 10k
C16 47F
R14 27k
Volume Control C31 100nF SW1
R15 6.8k
IC2
9V L5 3.3H C25 1F C26 100nF 38.9MHz C29 10nF C24 1nF LC1
1 2 3 4 5 6 7 8 9 10 11 12
STV8224
12V
R35
Q4 BC337
15 C15 680nF R13 68 C14 4.7nF
C30 470nF
R34
C33 10F
External CVBS Input R29 75 +9V C27 470nF CVBS Ouput
390
9V
DZ1 BZX55C 9V6
R17 100k C32 10nF C28 68pF BFP 5.5MHz CF1 D2 1N4148
AFC Output
R21 1.8k
R24 4.7k
Q3 BC547
R28 4.7k +9V SW4 STD R20 1k R25 2.7k R26 3.9k
R19 1k
R16 100k Switching Voltage
C17 1F
R10 22 BFP 6.5MHz CF2 D1 1N4148 R27 TRAP FILTER (5.5MHz - 6.5MHz) L6 R12 2.2k BC547 Q2 R18 75 CVBS Output (to SCART)
R22 150
1.8k
8.2H CF3
R9 560
8225-06.EPS
STV8225
INPUT/OUTPUT PINS CONFIGURATION
VCC 12 SC_IN 11 5A CONTROL 10 125A 50A SC_OUT 9
5k VCC 250A
VCC
100 50k 250A 10A 1mA
C_MEAN 13 50A
VREF 4.3V
VREF 4.3V
6.4V 1.3k
8
V6.4 (if used)
IF1 14
6.0V 125A 26k 100 1mA (charge) 5A 250A 7 AUDIO 50A 50k VREF 4.3V 5 FM_IN 10A
IF2
1 1k 1k
VCC
4.2V
IC C_AGC 2 VCC 6V 100A 2.7V
VCC 114k VCC
ID (discharge) 3 GND 4 LSW
66k
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. (c) 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

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