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STV8224A
MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES
. . . . . . .
PRELIMINARY DATA
VIDEO PLL DEMODULATION SOUND PLL DEMODULATION POSITIVE AND NEGATIVE MODULATION AGC FOR BG AND L STANDARDS AUDIO SWITCH DC VOLUME CONTROL VIDEO SWITCH
DESCRIPTION The STV8224Ais a picture and sound IF processor for multistandard application with very few external components and adjustments. It provides the audio and video switches for one SCART plug application. AM sound demodulation is performed with the STV8225 add-on. PIN CONNECTIONS
SHRINK24 (Plastic Package) ORDER CODE : STV8224A
PIF PLL FILTER AFC OUTPUT CVBS OUTPUT SWITCHING INPUT (STANDARD + INT/EXT) IF LC IF LC AUDIO HIGH PASS FILTER 2nd IF SOUND INPUT 2nd IF DECOUPLING + MUTE INTERNAL VIDEO INPUT VIDEO SWITCH OUTPUT EXTERNAL VIDEO INPUT
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
TUNER AGC STARTING POINT ADJUSTMENT TUNER AGC OUTPUT AGC CAPACITOR AGC CAPACITOR (L STANDARD) IF INPUT IF INPUT GROUND V CC EXTERNAL AUDIO INPUT FM DEMODULATED AUDIO OUTPUT AUDIO SWITCH OUTPUT VOLUME CONTROL + MUTE
8224A-01.EPS
May 1995
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without no tice.
1/12
STV8224A
BLOCK DIAGRAM
EXT CVBS
AFC OUTPUT
VCC 5 6 1 12
6dB
2
17
18 11 10 SWITCHED CVBS
PIF PLL & AFC
19 IF INPUT 20 21 AGC 22 TUNER AGC OUTPUT 23 TUNER AGC 24 14 13 DC VOLUME
VID AMP
WHITE NOISE & SPOT INVERT
3 SFE 5.5 SFE 6.5 CVBS OUT
Int/Ext LOGIC INTERFACE BG/L SIF PLL LIMITER & MUTE 8 9 4
16
15
7
STV8224A
EXT AUDIO
AUDIO OUT
ABSOLUTE MAXIMUM RATINGS
Symbol VS Vx Tstg Toper Supply Voltage Tuner AGC Voltage Storage Temperature Operating Temperature Parameter Value 13.5 VCC -40, +150 0, +70 Unit V
o o
C C
Symbol Rth (j-a)
Parameter Junction-ambient Thermal Resistance Max.
Value 75
Unit
o
C/W
2/12
8224A-02.TBL
THERMAL DATA
8224A-01.TBL
V
8224A-02.EPS
SWITCHED AUDIO
STV8224A
ELECTRICAL CHARACTERISTICS (Tamb = 25C, VCC = 9V, IF input = 10mVRMS sync level at B/G, Peak-white level at L, Video modulation DSB, D = 90% at B/G, D = 95% at L, fPC = 38.9MHz, fSC = 33.4MHz, Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fM = 1kHz, Audio BW = 20kHz, f = 50kHz, Volume attenuation = 0dB, unless otherwise specified)
Symbol SUPPLY VCC ICC Supply Voltage Supply Current I17, VCC = 9V 8 9 70 12.6 95 V mA VRMS k pF dB mVRMS Parameter Test Conditions Min. Typ. Max. Unit
IF AMPLIFIER V19-20 R19-20 C19-20 Gr Input Sensitivity (RMS) Differential Input Resistance Differential Input Capacitance Gain Control Range Max Input Signal SYNCHRONOUS VIDEO DEMODULATOR DFPC AFC S2 AFC Slope See Figure 21 0.2 A/kHz Vision Carrier Capture -1.4 1.6 MHz +1dB Video at Output -3dB Video at Output 70 1.5 2 64 110
DEMODULATED VIDEO OUTPUT (Pin 3) VA3 BG vs L VS3 Amplitude Amplitude Difference Top Sync Level Zero Carrier Level BW Dg Dp Vr3c Vr3h I3 S/N VWTH VWIL VBTH VBIL Bandwidth Differential Gain Differential Phase Residual Carrier Signal (RMS Value) Residual 2nd Harmonic (RMS Value) Internal Bias of Emitter Follower Signal to Noise Ratio Intermodulation 1.07MHz White Noise Threshold Voltage White Noise Insertion Level Black Noise Threshold Voltage Black Noise Insertion Level Note 1 - Weighted CCIR-567 Note 2 3 53 B/G and L B/G L -3dB Video Signal 6 1.6 1.9 4.4 1.8 7 6 6 1 1 5 58 52 4.85 3.6 1.3 2.5 8 8 10 10 Top Sync to White 2 2.3 2.6 10 2.2 VPP % V V V MHz % Degree mV mV mA dB dB V V V V A A
AGC CIRCUIT (BG MODE) I22DBG C/D
Notes : 1. S
Discharge Current Charging/Discharging Ratio
N
= 20 log 10
12
20 45
28
Vout black white at BW = 5MHz VN (mVRMS) 2. Video carrier relative level = 0dB, Chroma subcarrier level = -3.2dB, Sound carrier relative level = -20dB. AGC voltage (Pin 22) is adjusted to get 1VPP signal on output (Pin 3).
3/12
8224A-03.TBL
I22CBG
Charging Current
550
950
1300
STV8224A
ELECTRICAL CHARACTERISTICS (continued) (Tamb = 25C, VCC = 9V, IF input = 10mVRMS sync level at B/G, Peak-white level at L, Video modulation DSB, D = 90% at B/G, D = 95% at L, fPC = 38.9MHz, fSC = 33.4MHz, Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fM = 1kHz, Audio BW = 20kHz, f = 50kHz, Volume attenuation= 0dB, unless otherwise specified)
Symbol AGC CIRCUIT (L MODE) I22CL I22DL I22CL+ Charging Current Discharge Current Additional Charging Current Threshold Voltage Level for Additional Charging Current I22DL+ Additional Discharging Current Threshold Voltage Level for Additional Discharging Current TUNER AGC I23 S23 I23+ Maximum Sinked Current Current Slope Maximum Tuner Plus Sinked Current R24 = 5k Note 6 1.5 100 2 170 40 2.5 230 mA A/dB mA V k dB dB 1.4 1 900 VRMS % dB Refered to Pin 3 L in case of missing, VITS Pulses and no White in Video Content Refered to Pin 3 28 Note 3 2 3.3 0.3 5 2.75 40 2.25 56 4.5 mA A A V A V Parameter Test Conditions Min. Typ. Max. Unit
FM SOUND DEMODULATION V8S R8 AMR SVR V15 THD R15 S/N Input Sensitivity Limiter Input Resistance Amplitude Modulation Rejection Supply Voltage Rejection Ratio Detected Audio Output Signal Total Harmonic Distortion Internal Deemphasis Resistor Signal to Noise Ratio Note 5, Weighted CCIR 468-4 600 50 Note 4 Ripple signal : 100Hz, 0.5VPP 50 12 0.85 -3dB FM detected signal 35 1.2 61 17 1.1 0.2 750 55
VOLUME CONTROL VC Range Control Range See Figure 22 72 77 dB
AUDIO SWITCH CRtk EXTHD Crosstalk THD on External Signal VIN = 2VRMS, Attenuation = 0dB 70 80 0.1 0.3 dB %
8224A-04.TBL
R16
Input Resistance
45
60
75
k
Notes : 3. Triggered on white level V15 (mVRMS) 4. AMR = 20 log (dB) where VAM = output amplitude in AM for fM = 1kHz and m = 30% VAM S V15 (mVRMS) 5. = 20 log (dB) VN (mVRMS) N 6. Additional sinked current for large increasing steps of input signal when : - Voltage Pin 22 > starting point defined Pin 24. - Output signal (Pin 3) saturated (V3 < V BTH in BG mode, V3 > V WTH in L mode).
4/12
STV8224A
ELECTRICAL CHARACTERISTICS (continued) (Tamb = 25C, VCC = 9V, IF input = 10mVRMS sync level at B/G, Peak-white level at L, Video modulation DSB, D = 90% at B/G, D = 95% at L, fPC = 38.9MHz, fSC = 33.4MHz, Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fM = 1kHz, Audio BW = 20kHz, f = 50kHz, Volume attenuation= 0dB, unless otherwise specified)
Symbol VIDEO SWITCH VDC 12 VS12 V11 VS11 GEX I12 VBW GIN DC Input Level Top Sync. Clamp Level DC Output Level Top Sync. Clamp Level Crosstalk Gain from Ext. Input to Output Output Swing Input Current Bandwidth Gain from Int. Input to Output V12 = VDC12 = 1.5V VIN = 1VPP -0.5 5.5 4 No signal 1.7 No signal 1.6 1.9 1.8 2 1.5 55 6 5 1 15 0 +0.5 5 6.5 2.3 2.2 V V V V dB dB V A MHz dB Parameter Test Conditions Min. Typ. Max. Unit
MUTE (Pin 9 or Pin 13) VTH9 V9 VTH13 Threshold Voltage Pin 9 DC Level when Mute Disabled Threshold Voltage Pin 13 High impedance controling circuit 0.2 1.7 2 2.8 0.3 0.4 2.3 V V V
CONTROL INPUT Negative Modulation Positive Modulation Threshold 3 Threshold 2 Threshold 1 Video : External - Audio : External Video : Internal - Audio : Internal Video : External - Audio : External Video : Internal - Audio : External Level linked to V CC Level linked to V CC Level linked to V CC 7.2 1.8 4.9 2.6 6.4 4.1 1.8 6.8 4.5 2.2 6.4 4.1 7.2 4.9 2.6 V V V V V V
8224A-05.TBL
V
5/12
STV8224A
INPUT/OUTPUT PIN CONFIGURATION Figure 1 : PIF PLL Filter Figure 2 : AFC Output
2
1
8224A-03.EPS
Figure 3 : CVBS Output
Figure 4 : Switching Input Standard + INT/EXT
3
4
Figure 5 : IFLC
8224A-05.EPS
Figure 6 : Audio High Pass Filter
2k
2k
5
6
7
8224A-07.EPS
6/12
8224A-08.EPS
8224A-06.EPS
8224A-04.EPS
STV8224A
INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 7 : 2CD IF Sound Input (Pin 8) 2CD IF Decoupling + Mute (Pin 9) Figure 8 : Internal Video Input
560
560
8
9
10
Figure 9 : Video Switch Output
8224A-09.EPS
Figure 10 : External Video Input
11
12
8224A-11.EPS
Figure 11 : Volume Control + Mute
Figure 12 : Audio Switch Output
13
14
8224A-13.EPS 8224A-14.EPS
Figure 13 : FM Demodulated Audio Output
Figure 14 : External Audio Input
1k
15
8224A-15.EPS
16
7/12
8224A-16.EPS
8224A-12.EPS
8224A-10.EPS
STV8224A
INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 15 : VCC Figure 16 : IF Input
800
17 15V
19
800
20
8224A-17.EPS
Figure 17 : AGC Capacitor
Figure 18 : AGC Capacitor
21
22
8224A-19.EPS 8224A-20.EPS
Figure 19 : Tuner AGC Output
Figure 20 : Tuner AGC Starting Point Adjustment
23
24
8224A-21.EPS 8224A-22.EPS
8/12
8224A-18.EPS
STV8224A
Figure 21 : AFC Voltage Pin 2 vs IF Frequency
8 AFC VOLTAGE (PIN 2) (V) 7 6 5 4 3 2 1
8224A-26.EPS
Figure 22 : Volume Control Attenuation vs V13
0 VOLUME CONTROL ATTENUATION (dB) -10 -20 -30 -40 -50 -60 -70 1.0 2.0 3.0 V13 (V) 4.0 5.0
8224A-27.EPS 8224A-29.EPS
Current Conversion with 100k/100k Bridge
0 38.55
-80
38.75
38.95
39.15
39.35
IF FREQUENCY (MHz)
Figure 23 : Tuner AGC Output Current vs VIN (R24 is external adjustment Pin 24)
TUNER AGC OUTPUT CURRENT (mA) 2 1.75 1.5 1.25 1 0.75 0.5 0.25 0.1 1 10 VIN (mV RMS ) 100 200
8224A-28.EPS
R24 = 1k R24 = 3k R24 = 5k
0
Figure 24 : Black and White Noise Inverter
V3 (V) 4.85 4.2 3.6 2.5 1.9 1.3 White Spike Noise Clamp Top White White Noise Level Insertion Black Noise Level Insertion Top Synchronization Black Spike Noise Clamp t
9/12
10/12
C9 10F L4 R11 220 10F C21 47F C20 C18 1F C19 47nF 100nF
20 19 18 17 16 15 14 13 22 21 24 23
STV8224A
External Sound Input (From SCART)
C8
3.3H C6 C7 68nF 4.7F
IF1
VIDEO SAW FILTER BGDK R32 10k
Demodulated Sound Output (To SCART) Switched Sound Output
APPLICATION DIAGRAM (B/G/D/K) STV8224A
Tuner AGC Output
+9V Volume control Mute C31 100nF SW1 P2 10k
C16 47F P1 10k
R14 27k
R15 6.8k
C17 10nF
STV8224A
1 2 3 4 5 6 7 8 9 10 11 12
12V LC1 C15 220nF R13 220 38.9MHz C29 10nF R24 4.7k C24 1nF +9V C14 4.7nF C25 1F C26 100nF C27 470nF
R35
Q4 BC337
Tuner AGC 9V Delay
15
C30 470nF
R34
C33 10F
390
R29 75
External CVBS Input (From SCART)
9V
DZ1 BZX55C 10V
CVBS Ouput R28 4.7k Q3 BC547 +9V
R17 100k C32 10nF Switching Voltage C28 1.8k 68pF R20 1k 1N4148 D2 BFP 5.5MHz CF1 R21
AFC Output
R16 100k
R25 2.7k
R26 3.9k
SW4 STD
R10 22 BC547 Q2 R27 R18 TRAP FILTER (5.5MHz - 6.5MHz) L6 R12 2.2k CVBS Output (To SCART)
BFP 6.5MHz CF2 D1 1N4148 R22 150
1.8k
8.2H CF3
R9 560
75
8224A-25.EPS
L7 C11 47F C12 R11 220 10F Sound Output (To SCART) 100nF C8 10F External Sound Input (From SCART) 3.3H
C9
C10 22F
14 13 12 11 10 9 8
IF2
SOUND SAW FILTER L STD
IC1
1 2 3 4 5 6 7
STV8225
C13 10F L4 3.3H C21 47F C20 C17 10nF 100nF
20 19 18 17 16 15 14 13
Level Switch
C23 10F
C22 10F
IF1
APPLICATION DIAGRAM (B/G/D/K, L) STV8224A - STV8225
VIDEO SAW FILTER BGDKL C7 68nF
C6 4.7F
Switched Sound Output R32 10k +9V Volume Control P2 10k C31 100nF
Tuner AGC Output C18 1F P1 10k
24 23 22 21
C16 47F Mute
R14 27k
C19 47nF
R15 6.8k
IC2
1 2 3 4 5 6 7 8 9 10 11 12
STV8224A
SW1
12V LC1 C15 220nF R13 220 38.9MHz C29 10nF C24 1nF R24 4.7k R21 D2 1N4148 1.8k R20 1k D1 1N4148 R22 150 R27 1.8k R25 2.7k R26 3.9k C14 4.7nF C25 1F C26 100nF +9V
R35
Q4 BC337
9V
Tuner AGC Delay
15
R34
C33 10F
C30 470nF
390
R29 75 C27 470nF
External CVBS Input (From SCART)
9V
DZ1 BZX55C 10V
CVBS Ouput R28 4.7k Q3 BC547 +9V SW4 STD
R17 100k C32 10nF C28 Switching Voltage 68pF BFP 5.5MHz CF1
AFC Output
R16 100k
R10 22 BC547 Q2 TRAP FILTER (5.5MHz - 6.5MHz) L6 8.2H CF3 R12 2.2k R9 560 R18 75 CVBS Output (to SCART)
BFP 6.5MHz CF2
STV8224A
11/12
8224A-24.EPS
STV8224A
PACKAGE MECHANICAL DATA 24 PINS - PLASTIC SHRINK DIP
Dimensions A a1 b b1 b2 b3 D E e e3 e4 F i L
Min. 0.51 0.35 0.2 0.75 0.75 7.95
Millimeters Typ. 3.3
Max.
Min. 0.020 0.014 0.008 0.030 0.030 0.313
Inches Typ. 0.130
Max.
0.59 0.36 1.42 23.11 9.73 1.778 19.558 7.62 6.86 5.08
0.023 0.014 0.056 0.910 0.383 0.070 0.770 0.300
SDIP24.TBL
0270 0.200 0.100
2.54
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.
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PMSDIP24.WMF

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