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STV8224B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES
. . . . . . .
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 STV8224B is a pictureand 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 : STV8224B
PIF PLL FILTER AFC OUTPUT CVBS OUTPUT SWITCHING INPUT (STANDARD + INT/EXT) IF LC IF LC AUDIO HIGH PASS FILTER 2nd IF SOUND INPUT AUDIO AND 2nd IF DECOUPLING 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
8224B-01.EPS
VOLUME CONTROL + MUTE
January 1997
1/12
STV8224B
BLOCK DIAGRAM
EXT CVBS AFC OUTPUT
V CC 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 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 AUDIO Vref MUTE 14 13 16 15 7 8 4
9
STV8224B
SWITCHED AUDIO
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
8224B-02.TBL
THERMAL DATA
8224B-01.TBL
V
8224B-02.EPS
STV8224B
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 R 19-20 C 19-20 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 2 2 68 180
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 56 B/G and L B/G L -3dB Video Signal 7 1.6 1.9 4.4 1.8 9 6 3 1 1 5 61 52 4.85 3.6 1.3 2.5 8 6 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
S
Discharge Current Charging/Discharging Ratio
12
20 45
28
Vout black white Notes : 1. = 20 log 10 at BW = 5MHz N 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
8224B-03.TBL
I22CBG
Charging Current
550
950
1300
STV8224B
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 I22 CL+ Charging Current Discharge Current Additional Charging Current Threshold Voltage Level for Additional Charging Current I22 DL+ 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 4 1.5 100 2 170 40 2.5 230 mA A/dB mA 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 V 8S R8 AMR SVR V15 THD R 15 S/N Input Sensitivity Limiter Input Resistance DC Voltage (Pin 8) Amplitude Modulation Rejection Supply Voltage Rejection Ratio Detected Audio Output Signal Total Harmonic Distortion Internal Deemphasis Resistor Signal to Noise Ratio See Note 6, Weighted CCIR 468-4, (quasi peak level) input Pin 8 Measurement between IF input (Pins 19-20) and audio output (Pin 15) SAW : K2955 BPF : SFE5.5MB 600 55 Note 5 Ripple signal : 100Hz, 0.5VPP 50 28 0.85 150 600 4.2 61 33 1.1 0.2 750 60 1.4 1 900 VRMS V dB dB VRMS % dB
Black Picture (sync only) White Picture 250kHz Square Wave VOLUME CONTROL VC Range Control Range
47 46 47
52 50 52
dB dB dB
8224B-04.TBL
See Figure 22
72
77
dB
Notes : 3. Triggered on white level 4. 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). V15 (mVRMS) 5. AMR = 20 log (dB) where VAM = output amplitude in AM for fM = 1kHz and m = 30% VAM V15 (mV S RMS) 6. = 20 log (dB) VN (mVRMS) N
4/12
STV8224B
ELECTRICAL CHARACTERISTICS (continued) (Tamb = 25C, VCC = 9V, IF input = 10mVRMS synclevel 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 AUDIO SWITCH R 16 CRtk En EXTHD Input Resistance Crosstalk Output Noise Level (Pin 14) THD on External Signal (Pin 14) Audio Reference Voltage (Pin 9) VIDEO SWITCH VDC 12 VS12 V11 VS11 GEX I12 VBW GIN MUTE (Pin 13) VTH13 Threshold Voltage Pin 13 0.2 0.3 0.4 V 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 Weighted CCIR 468-4, V13 = 0.5V (quasi peak level) VIN = 2VRMS, Attenuation = 0dB 55 70 70 80 70 0.1 4.5 0.3 85 k dB V % V Parameter Test Conditions Min. Typ. Max. Unit
CONTROL INPUT Negative Modulation Threshold 3 Positive Modulation Threshold 2 Positive Modulation Threshold 1 Negative Modulation Video : External - Audio : External Level linked to VCC Video : External - Audio : External Level linked to VCC Video : Internal - Audio : External Level linked to VCC Video : Internal - Audio : Internal 7.2 6.4 4.9 4.1 2.6 1.8 2.2 4.5 6.8 7.2 6.4 4.9 4.1 2.6 1.8 V V V V V V
8224B-05.TBL
V
5/12
STV8224B
INPUT/OUTPUT PIN CONFIGURATION Figure 1 : PIF PLL Filter Figure 2 : AFC Output
2
1
8224B-03.EPS
Figure 3 : CVBS Output
Figure 4 : Switching Input Standard + INT/EXT
3
4
Figure 5 : IFLC
8224B-05.EPS
Figure 6 : Audio High Pass Filter
2k
2k
5
6
7
8224B-07.EPS
6/12
8224B-08.EPS
8224B-06.EPS
8224B-04.EPS
STV8224B
INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 7 : 2nd IF Sound Input (Pin 8) Audio and 2nd IF Decoupling (Pin 9) Figure 8 : Internal Video Input
600
600
8
9
10
Figure 9 : Video Switch Output
8224B-09.EPS
Figure 10 : External Video Input
11
12
8224B-11.EPS
Figure 11 : Volume Control + Mute
Figure 12 : Audio Switch Output
13
14
8224B-14.EPS 8224B-13.EPS
Figure 13 : FM Demodulated Audio Output
Figure 14 : External Audio Input
16
750 15
8224B-15.EPS 8224B-16.EPS
7/12
8224B-12.EPS
8224B-10.EPS
STV8224B
INPUT/OUTPUT PIN CONFIGURATION (continued) Figure 15 : VCC Figure 16 : IF Input
1k
15V
19
1k
17
20
8224B-17.EPS
Figure 17 : AGC Capacitor
Figure 18 : AGC Capacitor
21
22
8224B-19.EPS 8224B-20.EPS
Figure 19 : Tuner AGC Output
Figure 20 : Tuner AGC Starting Point Adjustment
23
24
8224B-21.EPS 8224B-22.EPS
8/12
8224B-18.EPS
STV8224B
Figure 21 : AFC Voltage Pin 2 vs IF Frequency
8 AFC VOLTAGE (PIN 2) (V) VOLUME CONTROL ATTENUATION (dB) 7 6 5 4 3 2 1
8224B-23.EPS
Figure 22 : Volume Control Attenuation vs V13
0 -10 -20 -30 -40 -50 -60 -70 1.0 2.0 3.0 V13 (V) 4.0 5.0
8224B-24.EPS 8224B-26.EPS 8224B-30.EPS
Current Conversion with 100k/100k Bridge
0 38.55
-80
38.75 38.95 39.15 IF FREQUENCY (MHz)
39.35
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
8224B-25.EPS
Figure 24 : Video Signal to Noise Ratio (Pin 3) as a function of IF Input Signal (Pins 19-20) Weighted CCIR-567
80 70 60 S/N (dB) 50 40 30 20 10
R24 = 1k R24 = 3k R24 = 5k
0 10-1 1 VIN 10 (mV RMS ) 102 103
0 0.01
0.1
1 VIN (mVRMS)
10
100
Figure 25 : 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 100nF
22 21 20 19 18 17 16 15 14 13 24 23
STV8224B
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 3.3k +9V
APPLICATION DIAGRAM (B/G/D/K) STV8224B
Tuner AGC Output
Volume control Mute C31 100nF SW1
C16 2.2F P1 10k
R14 27k
P2 10k
R15 6.8k
C17 10nF
STV8224B
1 2 3 4 5 6 7 8 9 10 11 12
12V LC1 C25 10F C26 100nF
R35
Q4 BC337 1nF R13 330 38.9MHz C29 10nF R24 4.7k C24 1nF +9V C15 100nF
Tuner AGC 9V Delay
15
C30 470nF
R34
C33 10F
390
R29 75 C27 470nF
External CVBS Input (From SCART)
9V
DZ1 BZX55C 10V
CVBS Ouput R28 4.7k Q3 BC547 +9V SW4 STD R25 2.7k R26 3.9k
R17 100k Switching Voltage C28 1.8k 68pF R20 1k 1N4148 D2 BFP 5.5MHz CF1 R21
AFC Output C32 10nF
R16 100k
R10 22 BC547 Q2 R27 TRAP FILTER (5.5MHz - 6.5MHz) L6 R12 2.2k R18 CVBS Output (To SCART)
BFP 6.5MHz CF2 D1 1N4148 R22 150
1.8k
8.2H CF3
R9 560
75
8224B-27.EPS
L7 3.3H 47F C12 R11 220 10F Sound Output (To SCART) 100nF C8 10F External Sound Input (From SCART)
C11 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 C6 C7 68nF 4.7F Level Switch
C23 10F
C22 10F
IF1 C21 47F C20 C18 1F 100nF
20 14 13 19 18 17 16 15
APPLICATION DIAGRAM (B/G/D/K, L) STV8224B - STV8225
VIDEO SAW FILTER BGDKL
Switched Sound Output R32 10k 3.3k Volume Control +9V P2 10k C31 100nF
Tuner AGC Output C19 47nF
22 21
C16 47F P1 10k
24 23
R14 27k Mute
C17 10nF
R15 6.8k
IC2
1 2 3 4 5 6 7 8 9 10 11 12
STV8224B
SW1
12V LC1 C25 10F C26 100nF
R35
Q4 BC337
9V 1nF
Tuner AGC Delay
15 C15 100nF R13 330 38.9MHz C29 10nF C24 1nF R24 4.7k R21 D2 1N4148 1.8k
C30 470nF
R34
C33 10F
390
R29 75 +9V C27 470nF
External CVBS Input (From SCART)
9V
DZ1 BZX55C 10V
CVBS Ouput R28 4.7k Q3 BC547 +9V
R17 100k C32 10nF C28 68pF BFP 5.5MHz CF1
AFC Output
R16 100k
Switching Voltage
R20 1k D1 1N4148 R27
R25 2.7k
R26 3.9k
SW4 STD
R10 22 BC547 Q2 TRAP FILTER (5.5MHz - 6.5MHz) L6 R12 2.2k R18 1.8k R9 560 8.2H 75 CVBS Output (to SCART)
BFP 6.5MHz CF2
R22 150
STV8224B
CF3
11/12
8224B-28.EPS
STV8224B
PACKAGE MECHANICAL DATA 24 PINS - PLASTIC SHRINK DIP
E E1
A1
A2
Stand-o ff B B1 e e1 e2
L c D E 24 13 F
.015 0,38 Gage Plane
A
1
12 e3
SDIP24
e2
Dimensions A A1 B B1 C D E E1 e e1 e2 e3 L
Min. 0.51 3.05 0.36 0.76 0.23 22.61 7.62 6.10
Millimeters Typ.
Max. 5.08 4.57 0.56 1.14 0.38 23.11 8.64 6.86
Min. 0.020 0.120 0.0142 0.030 0.0090 0.890 0.30 0.240
Inches Typ.
Max. 0.20 0.180 0.0220 0.045 0.0150 0.910 0.340 0270
3.30 0.46 1.02 0.25 22.86 6.40 1.778 7.62
0.130 0.0181 0.040 0.0098 0.90 0.252 0.070 0.30
2.54
3.30
0.10
0.130
Information furni shed is believed to be accurate and reliable. However, SGS-THOMSON Micr oelectronics 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 und erany patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This pu blication 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) 1997 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I 2C 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 conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
12/12
SDIP24.TBL
10.92 1.52 3.81
0.430 0.060 0.150
PMSDIP24.EPS

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