TDA8222 VIDEO & SOUND IF SYSTEM WITH VIDEO AND SOUND SWITCHES .. .. . .. . .. 3 STAGE IF GAIN CONTROLLED AMPLIFIER SYNCHRONOUS VIDEO DEMODULATOR TOP SYNC AGC CIRCUIT WHITE AND BLACK NOISE INVERTER TUNER AGC OUTPUT FOR PNP TUNERS (suitable also for MOSFET tuners) ANALOG AFC FM DETECTOR AUDIO AND VIDEO SWITCHES COMPATIBLE WITH SCART EUROPEAN NORM DC VOLUME CONTROL MUTE FUNCTION SHRINK DIP24 (Plastic Package) ORDER CODE : TDA8222 DESCRIPTION The TDA8222 is a video and sound IF circuit in Shrink DIP24 package for color and black and white TV sets. It is intended to operate with a negatively modulated vision carrier and frequency modulated sound carrier. It incorporates video and audio switches compatible with SCART european norm. PIN CONNECTIONS 1 24 AGC TIME CONSTANT TUNER AGC OUTPUT 2 23 IF LC V CC 3 22 IF LC VIDEO SWITCH V CC 4 21 SWITCHING INPUT BALANCED IF INPUT 5 20 AFC LC BALANCED IF INPUT 6 19 AFC OUTPUT GROUND 7 18 DEMODULATED CVBS OUTPUT AUDIO SWITCH OUTPUT 8 17 EXTERNAL AUDIO INPUT VOLUME CONTROL 9 16 2nd IF SOUND INPUT FM REFERENCE TUNED CIRCUIT 10 15 2nd IF DECOUPLING INPUT + MUTE DEMODULATED AUDIO OUTPUT 11 14 INTERNAL VIDEO INPUT VIDEO SWITCH OUTPUT 12 13 EXTERNAL VIDEO INPUT October 1993 8222-01.EPS TUNER AGC STARTING POINT ADJUSTMENT 1/9 TDA8222 BLOCK DIAGRAM 3 2 1 24 Tuner 23 20 Reference Amplifier AGC AGC 22 19 AFC 5 Video IF Amplifier Amplifier 6 Band Gap White and Black Noise Inverter Voltage Reference 18 4 9 14 8 D.C. Volume 6dB Control 17 12 6dB Limiter Discri LP Filter Mute 13 TDA8222 10 16 15 21 7 FUNCTIONAL DESCRIPTION General The IC consists of the following parts (see block diagram): - Three stages gain controlled wide band amplifier - Quasi-synchronous demodulator - Video amplifier with white and black noise inverter - AGC circuit which operates on top sync level - Analog AFC circuit - FM discriminator - Mute function - Video and audio switches - DC volume control IF Amplifier It consists of three cascaded AC coupled differential gain stages. The gain of each amplifier is controlled by the AGC voltage. The global AGC range is more than 60dB. Thanks to the internal AC coupling no DC feedback is required. Demodulation It is a quasi-synchronous type with passive carrier 2/9 regeneration done by an external tuned circuit, and a limiter amplifier. Video Amplifier The video amplifier provides a 2VPP video signal to the output with a good phase and amplitude frequency response. White and Black Noise Inverter A fixed 3.2V level is inserted when a white spot above 4.5V (measured on the video output Pin 18) happens, this prevents from very noisy signal on the screen. A fixed 2.5V level is inserted when a black spot below 1.3V happens, this to avoid synchronization on parasitic signals. AGC Circuit The AGC detector operates on top sync level, an external capacitor on Pin 24 controls the time constant. The voltage on this capacitor is converted into a current to control the amplifier stage. 8222-02.EPS 11 FM TDA8222 Tuner AGC It sinks a current to control the gain of the tuner RF amplifier. Its starting point is adjusted by an external potentiometer (Pin 1). AFC Circuit It is a FM demodulator stage which delivers on Pin 19 a current proportional to the frequency difference between the IF input signal and the reference IF frequency of the external LC on Pin 20. This current is converted into a voltage by means of a resistor network. FM Demodulation It consists of a three stage limiter amplifier in order to reject the amplitude modulation and a quadrature demodulator. The deemphasis filter is built with an internal resistor and an external capacitor on Pin 11. Mute Function It is an internal switch to cut-off the internal audio signal. It acts when a level below 2.1V is applied on Pin 15. When no mute, the Pin 15 must be driven with a high DC impedance. Video and Audio Switches They are both controlled by the Pin 21 voltage. Internal sources or external sources can be sent to the outputs (Pin 12 for video and Pin 8 for audio). The internal signals are selected by a control level below 2.5V on Pin 21, the external ones by a control level above 5V. The gain of the video switch is 6dB for both internal and external signals. The gain of the audio switch is 0dB for the maximum volume. Parameter Value 13.5 VCC -40, +150 0, +70 Supply Voltage Tuner AGC Voltage Storage Temperature Operating Temperature Unit V V o C o C 8222-01.TBL Symbol VS VX Tstg Toper Unit C/W 8222-02.TBL ABSOLUTE MAXIMUM RATINGS THERMAL DATA Symbol Rth (j-a) Parameter Junction-ambient Thermal Resistance Value 75 Max. o ELECTRICAL CHARACTERISTICS (Tamb = 25oC, VCC = 9V, IF input = 10mVRMS top sync, D = 90%, Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fm = 1kHz, Audio BW = 20kHz, ∆f = ± 25kHz, Volume attenuation = 0dB, Rload on Pin 12 = 1kΩ, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit 8.1 24 9 38 12.6 52 V mA SUPPLY VCC ICC Voltage Operating Range Supply Current I(3) + I(4), VCC = 9V IF AMPLIFIER R22-23 C22-23 GR Input Sensitivity Differential Input Resistance Differential Input Capacitance Gain Control Range Refer to test circuit µV kΩ pF dB 70 1.5 2 64 VA18 VS18 BW Amplitude Top Sync Level Bandwidth Top sync to white without output filter See Figure 1 1.8 1.6 5 2.1 1.9 7 2.4 2.2 VPP V MHz 3/9 8222-03.TBL DEMODULATED VIDEO OUTPUT (Pin 18) TDA8222 ELECTRICAL CHARACTERISTICS (continued) (Tamb = 25oC, VCC = 9V, IF input = 10mVRMS top sync, D = 90%, Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fm = 1kHz, Audio BW = 20kHz, ∆f = ± 25kHz, Volume attenuation = 0dB, Rload on Pin 12 = 1kΩ, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit 3 3 1 7 7 10 % Degree mV 2 20 mV DEMODULATED VIDEO OUTPUT (Pin 18) (continued) DG DP V18 V18 I18 S/N VWTH VWIL VBTH VBIL 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 IF input = 5mVRMS top sync 3 5 55 50 4.5 3.2 1.3 2.5 550 12 900 20 45 1200 26 µA µA 1.2 2.6 mA µA/dB Note 1 Note 2 See Figure 5 See Figure 5 mA dB dB V V V V AGC CIRCUIT I24C I24D C/D Charging Current Discharge Current Charging / Discharging Ratio TUNER AGC I2 S2 Sinked Current Current Slope See FIgure 4 1.9 300 AFC Slope See Figure 2, refer to test circuit 20 mV/kHz 60 53 1.2 µV dB kΩ 500 0.2 mVRMS % AFC FM SOUND DEMODULATION V16S AMR R16 Input Sensitivity Amplitude Modulation Rejection Limiter Input Resistance -3dB FM detected signal Note 3 40 AUDIO OUTPUT (PIn 11) Detected Audio Output Signal Total Harmonic Distortion Signal to Noise Ratio Note 4 Internal Deemphasis Resistor 1 68 700 1000 dB 1400 Ω VOLUME CONTROL VC range Control Range See Figure 3 80 VOUT black to white S = 20 Log 10 at BW = 5MHz VN (RMS) N 2. Video carrier relative level = 0dB, Chroma subcarrier relative level = -3.2dB, Sound carrier relative level = -20dB. V11 ( mVRMS ) (dB) where VAM = output amplitude in AM for fm = 1kHz and m = 30% 3. AMR = 20 Log VAM ( mVRMS ) V11 ( mVRMS ) S = 20 Log (dB) 4. VN ( mVRMS ) N Notes : 1. 4/9 dB 8222-04.TBL V11 THD S N R11 TDA8222 ELECTRICAL CHARACTERISTICS (continued) (Tamb = 25oC, VCC = 9V, IF input = 10mVRMS top sync, D = 90%, Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fm = 1kHz, Audio BW = 20kHz, ∆f = ± 25kHz, Volume attenuation = 0dB, Rload on Pin 12 = 1kΩ, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. 40 70 65 80 0.05 Max. Unit 0.3 kΩ dB % AUDIO SWITCH R17 CRtk EXTHD Input Resistance Crosstalk THD on External Signal VIN = 2VRMS, Attenuation = 0dB VIDEO SWITCH VDC 13-14 VS 13-14 V12 VS 12 G13-14 . 12 I13-14 VBW DC Input Level Top Sync Clamp Level DC Output Level Top Sync Clamp Level Crosstalk Gain from inputs to output Output Swing Input Current Bandwidth No signal 1.6 No signal 0.7 VIN = 1VPP 5.5 4.5 V13-14 = VDC 13-14 + 1.5V VIN = 1VPP 1.9 1.8 1.0 0.85 55 6 1 15 2.2 1.3 6.5 5 V V V V dB dB V µA MHz SWITCHING INPUT V21 ext V21 int I21 External Input Selection Level Internal Input Selection Level Sourced Current 5 V 2.5 10 0 µA V15 V15 Threshold Voltage DC Level when mute disabled High impedance controling circuit 2.1 2.8 8222-05.TBL MUTE V V 5/9 6/9 8222-03.EPS INPUT IF SOUND 100nF 10nF 50Ω 50Ω IF VIDEO INPUT 10nF 100nF 15 16 6 5 2 470Ω 470nF Mute Q = 80 5.5MHz 10 FM Discri Limiter 10pF IF Amplifier AGC 24 1µF LP Filter AGC Tuner 1 5kΩ 23 22 1µF 11 Amplifier 17 20 Video AFC VIDEO GENERATOR 22nF 14 4 50Ω 50Ω 13 21 10nF 6dB 6dB 7 12 8 18 100nF 1µF White and Black Noise Inverter 3 VCC 10nF 1µF AUDIO 9 D.C. Volume Control 1kΩ 19 Amplifier 10nF 100kΩ 100kΩ AFC OUT GENERATOR 4.7µF Reference 2.7kΩ 33pF Q = 80 Q = 80 33pF 38.9MHz 38.9MHz 47nF 500Ω 10kΩ 500Ω 10nF VIDEO OUT SWITCHED DEMODULATED AUDIO OUT AUDIO OUT SWITCHED VIDEO OUT DEMODULATED TDA8222 TEST CIRCUIT TDA8222 Figure 2 : AFC Voltage versus Input Frequency on Pin 19 Vout (dB) 0 9 -1 8 7 6 -2 -3 5 4 -4 3 2 f (MHz) 2 3 4 5 6 7 8 Figure 3 : Volume Control Attenuation versus Voltage on Pin 9 38.9 Attenuation (dB) -20 -30 -40 -50 VPin 9 (V) 1 2 3 4 5 8222-06.EPS -60 0 39.3 Output Current (mA) 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 Diff Input Voltage (mV) 0.2 0 0.1 1 10 1kΩ on Pin 1 -10 -70 39.1 Figure 4 : Tuner AGC Output Current on Pin 2 0 -80 38.7 8222-07.EPS 1 5kΩ on Pin 1 0 1 0 38.5 IF Frequency (MHz) 3kΩ on Pin 1 -6 8222-04.EPS -5 AFC Output Voltage (V) 8222-05.EPS Figure 1 : Output Signal Bandwidth on Pin 18 Figure 5 : Black and White Noise Inverter 4.5 White spike noise clamp 4 Top white 3.2 White noise level insertion 2.5 Black Noise level insertion 1.9 Top synchronization 1.3 Black spike noise clamp 8222-08.EPS V18 (V) t 7/9 8222-09.EPS CF2 : MURATA TPW04B (5.5 & 5.74MHz trap filter) CF1 : MURATA SFT5.5MA (5.5MHz filter) ( f C = 38.9MHz) LC3 1µF 27kΩ 8.2kΩ 100nF LC2 & LC3 : TOKO KXCA-K1062ADX ( f C = 5.5MHz) LC1 : TOKO BKAC-K1640HM 10µF AGC TUNER 12V VS 2.7kΩ 23 2 VCC INPUT (12V) AFC 21 4 47nF 9.1V 100kΩ 100kΩ 220kΩ 22 3 SCART SWITCHING 24 1 10µH VCC 39Ω 47nF 10kΩ 10µF SIEMENS FILTER SAW 3 2 7 10nF 560Ω CF1 15 MUTE 100nF 1.2kΩ 16 17 10 33pF 9 8 13 12 CF2 1kΩ 47nF 220Ω 4.7µF 8.2µH 470nF 14 11 LC1 470nF 180Ω 18 TDA8222 6 20 19 LC2 5 OFWG1961 5 4 1 100nF 10µH 1µH 2.7kΩ 100kΩ 8/9 3.3µH I.F. INPUT FROM TUNER 220Ω 100Ω 470nF VS 75Ω 68Ω BC237 10µF 1µF SCART OUT VIDEO SCART AUDIO IN SCART VIDEO IN SCART OUT AUDIO VIDEO OUT CONTROL VOLUME OUT AUDIO TDA8222 TYPICAL APPLICATION (for B/G standard) TDA8222 I a1 PACKAGE MECHANICAL DATA 24 PINS - PLASTIC SHRINK Stand-off L b1 b b2 e E Z e3 D 13 b3 Dimensions A a1 b b1 b2 b3 D E e e3 e4 F i L 12 Min. Millimeters Typ. 3.3 0.51 0.35 0.2 0.75 0.75 Max. Min. 0.59 0.36 1.42 0.020 0.014 0.008 0.030 0.030 23.11 9.73 7.95 Inches Typ. 0.130 0.023 0.014 0.056 0.910 0.383 0.313 1.778 19.558 7.62 0.070 0.770 0.300 6.86 5.08 2.54 Max. 0270 0.200 SDIP24.TBL 1 PMSDIP24.EPS F 24 Stand-off 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 notice. 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. © 1994 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 conforms to the I2C Standard Specifications as defined by Philips. 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