Obsolescence Notice This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/ SL5162 Multistandard VHF and UHF Television Demodulator Supersedes September 1996 edition, DS4497-2.1 DS4497-3.0 September 1998 The SL5162 multistandard modulator up-converts a baseband video signal with separate audio frequency input on to a VHF or UHF carrier up to 860MHz. It provides RF signals with negative or positive video modulation and AM or FM sound subcarrier to satisfy both PAL/NTSC and SECAM applications. The on-chip local oscillator uses an external resonator tank which may be controlled via any Mitel 1.3GHz synthesiser. Selection of both video and sound standards are provided by level switching of a single pin. A video AGC circuit is provided to ensure constant modulation depth. In PAL mode this may be disabled and a white clip circuit switched in to prevent overmodulation if desired. RF1 1 20 AGC RF2 2 19 VIDEO VCC2 3 18 TSG LOIN1 4 17 VEE1 LOOP1 5 16 OP2 LOOP2 6 15 OP1 LOIN2 7 14 MSS VEE2 8 13 SUB2 ST1 9 12 VCC1 ST2 10 11 AUDIO SL5162 MP20 FEATURES ■ Covers both Negative and Positive Modulation Systems Figure 1 Pin connections – top view ■ Internal AGC with Disable ORDERING INFORMATION ■ Control of Sound and Video Standard via Single Pin SL5162/KG/MP1S Miniature plastic package SL5162/KG/MP1T Tape and reel ■ Symmetrical 75Ω RF Outputs for Low Radiation ABSOLUTE MAXIMUM RATINGS ■ Audio Input with AM/FM Sound Modulator ■ Switchable Video Test Signal Generator (TSG) ■ Intercarrier Input for Second Sound Channel ■ ESD Protection 255°C to1150°C 220°C to1150°C 210°C to180°C 20·3V to17·0 V 20·3V to17·0V Storage temperature Junction temperature Ambient temperature Supply Voltage Voltage at any other pin PRESCALER OUTPUTS 5 UHF TANK 1 UHF OSC 2 UHF MIXER 6 15 4 16 MODULATED OUTPUTS 7 SUBCARRIER 2 13 FM CLAMP 19 VIDEO INPUT AUDIO OSC AGC MIXER DRIVER FM/AM SELECT 9 10 SOUND TANK 75 20 AGC CLIP CLIP 11 AUDIO INPUT OFFSET ADJUST 14 MODE SELECT TSG ENABLE 18 TSG LOGIC Figure 2 Block diagram SL5162 ELECTRICAL CHARACTERISTICS TAMB = 125°C (operating range 210°C to180°C), VCC = 15V, (operating range14·5 to15·5V). Max and Min values are guaranteed by either production test or design. They apply within the specified temperature and supply voltage ranges unless otherwise stated. Characteristic Value Pin Min. Supply Voltage Supply current Video Input Video input level (VP) 3, 12 3, 12 19 Max. 45 5·5 53 4·5 1·0 0·5 Eff. white clip level (VC) Input impedance Video bandwidth 21 dB 23dB Video SNR weighted Differential gain Differential phase Line tilt (black level) Clamp accuracy Audio Input Input impedance Audio bandwidth (21dB) Subcarrier frequency FM THD 10 25 60 62 62 62 Conditions V mA 65 65 0·5 5 Vp-p Vp-p V kΩ MHz MHz dB % deg % mV 7 1·0 kΩ kHz MHz % 1·5 1·17 100 VP = sync to white level, AGC disabled (note 1) VP = sync to white level, AGC enabled VC = sync to limit level (note 2) Except for duration of clamp pulse CCIR Rec 451-1 (note 3), mono sound system Dependent upon video input clamp capacitor VP=1·0V D (black level with and without input video) 11 25 15 4 0·5 Intercarrier Input Input level FM Performance Audio input for 100% deviation (635kHz) FM deviation sensitivity Max frequency deviation 13 AM Performance Audio Modulation depth Audio SNR (wideband) RF Output Peak vision carrier: SECAM (L) PAL Flatness band 470-860MHz APLD White Level, Nominal Negative modulation 11 Sync Tip Negative modulation Positive modulation Sync degradation (1ve mod) Units Typ. Determined by external components. In demodulated signal. Input signal =1 kHz sinewave at 635kHz deviation 140 mVp-p To define 222dBC (peak carrier) 100 mVp-p At device input 0·7 kHz/mV Audio input 1kHz sinewave kHz No pre-emphasis, dependent on external components 11 250 % dB 80 .46 Input = 200mVp-p at 1kHz 1, 2 83 84 2 62 dBµV VP = 1·0V, sync = 0·3V dBµV Differential 75Ω output dB % APL 10-90% 1, 2 12 17 22 % Relative to peak vision carrier (PVC), VP = 1·0V, all systems (note 4) % % % All systems 1,2 100 6 1 DSYNC1(16 S 3 7 3100) W 3 NOTES 1. This is the nominal input level to provide the preset video modulation index for the selected standard. Any variation from the nominal level will change the RF modulation index. 2. The actual clip level is set relative to the input video level. The level of 1·17V only applies if the video input signal is correctly proportioned. The white clip circuit operates only when the AGC is disabled. 3. Measured at CH38 with R&S EMFP demodulator and UAF Video Analyser. 4. Measured at CH21 with R&S EMFP reference demodulator and UAF Video Analyser. Synchronous demodulation. 2 SL5162 ELECTRICAL CHARACTERISTICS (continued) Characteristic Value Pin Min. Mod Index Control Sound subcarrier level, negative video modulation Sound subcarrier level, positive video modulation Second sound subcarrier Video Test Sig. Generator 18 Negative impedance Ceramic resonator impedance Prescaler 1, 2 Output amplitude Distortions Intermodulation: fV1(fS2fC) fV12fC fV12fS fV13fS Spurious (in band) Spurious (ex band) Harmonics: 2fV 3fV Sound in vision Vision in sound Local Oscillator 4,5,6,7 Frequency range Residual FM Typ. Units Conditions Max. 216 dBC Relative to PVC (note 4) 215 dBC Relative to PVC, with no audio modulation applied 222 dBC Relative to PVC 23 500 kΩ 30 mVp-p Single ended from 50Ω dBC dBC dBC dBC dBC dBC 270 270 270 275 270 270 dBC dBC dBC dBC 210 210 260 246 38·9 860 0·2 MHz kHz Values referred to PAL system G carrier level Note 5 Relative to 83dBµV modulated carrier (note 6) With 1Vp-p video input signal colour bars NOTES 5. fV = vision carrier, fS = sound subcarrier, fC = chroma subcarrier. 6. SUB 2 must be connected to VCC to achieve this performance. Pin Name Function 1 2 3 4 5 6 7 8 9 1o 11 12 13 14 15 16 17 18 19 20 RF 1 RF 2 VCC2 LOIN 1 LOOP 1 LOOP 2 LOIN 2 VEE2 ST 1 ST2 AUDIO VCC1 SUB 2 MSS OP 1 OP2 VEE1 TSG VID AGC UHF prescaler output 1 UHF prescaler output 2 Positive supply for UHF circuits UHF tank UHF tank UHF tank UHF tank UHF ground Sound tank 1 Sound tank 2 Audio 1 input Positive supply for baseband circuits Intercarrier (sound) input Video modulation/standard select 75Ω modulated output 75Ω modulated output Baseband ground Test signal generator input Video input AGC capacitor/disable switch Table 1 Pin descriptions VIDEO INPUT SECTION A composite signal of the selected standard is applied to the device via a coupling capacitor also acting as the clamp storage capacitor. A minimum level clamp is used to DC restore the video signal in the IC to an internally defined reference voltage. The AGC will give a constant output level with input signals between 0·5 and 1·5 Vp-p. If a controlled 1Vp-p video signal is available, the AGC may be disabled, in which case a white clip circuit is switched in, to prevent possible overmodulation. Selection of negative or positive modulation is via a single pin (14). The voltage on this pin controls an offset which is fed to the UHF mixer, thus determining both modulation depth, and sense of modulation. SOUND SECTION The sound is AC coupled and AM or FM modulated onto the pre-selected carrier, 4·5 - 6·5MHz; its level is nominally at 216dB relative to the peak vision carrier. UHF MODULATED OUTPUT Modulation and relative levels of vision and sound carrier levels are preset for the selected broadcast standard. Table 2 gives the output options available. Modulation index is fixed at 83% for all negative modulation systems and at 94% for SECAM standard L. Selection of sound tank frequency is defined by off-chip tank components. 3 SL5162 Sound Video Standard Modulation Mod. index (%) SC freq. (MHz) Modulation Pre-emphasis (µs) NTSC (M) Negative 83 4·5 FM 75 PAL (G) Negative 83 5·5 FM 50 PAL (I) Negative 83 6·0 FM 50 SECAM (L) Positive 94 6·5 AM Through Table 2 Video modulation/standard selection TEST SIGNAL GENERATOR (TSG) The internal test signal generator is driven from a 500kHz ceramic resonator. The TSG waveform is shown in Figure 3 and has an effective input video amplitude of 1V sync tip to white. Note that when TSG is enabled, the sound subcarrier modulation is disabled and so the audio is muted. 64µs WHITE 4 µs 12 µs 20 µs 4 µs 20 µs 4 µs BLACK SYNC Figure 3 TSG waveform APPLICATION NOTES The key to achieving acceptable modulator performance is to ensure a well planned circuit layout with good RF decoupling of all supplies and sensitive pins. Ground loops should be avoided or kept as small as possible since RF coupling is the single most important characteristic in degrading modulator performance. Where possible, double sided board with a ground plane should be used and care taken to decouple all sensitive pins as close to the device as possible. Oscillator Design and Layout The oscillator layout should be kept as small as possible to minimise parasitics. It is also recommended that the ground plane is kept as far away from the oscillator itself since this will minimise the unwanted capacitance from the tank components to the ground plane. This has two advantages: 1. It increases the oscillator tuning range 2. It minimises the amount of RF coupled into the ground plane by the oscillator. The circuit diagram shown in Figure 4 can be used for UHF or VHF applications. Surface mount components should be used wherever possible since these will minimise parasitics and also allow a more compact circuit design. For applications at VHF the values of the tuning components must be modified: the coupling capacitors should be increased to a value of 2·2pF or greater. For fixed frequency applications up to 100MHz (or limited tuning range applications) 15pF coupling capacitors can be used. Varactor tuning of the SL5162 should not be attempted unless the oscillator is synthesised, due to the wide temperature variation of varactor diodes. The application shown in Figure 4 uses a Mitel 1.3GHz TV synthesiser. This provides the required stability and tuning for the VCO. Any of the of the Mitel Media Products I2C and 3-wire bus synthesisers such as SP5611, SP5502, SP5026 should be suitable for use with the SL5162 4 Modulated Outputs The routing of the modulated outputs requires special attention since these are particularly vulnerable to coupling from the VCO: unwanted coupling of the LO frequency to the RF output will modify the modulation depth. Typically, in instances where RF coupling is present, the amount of coupling (and the phase) will vary as the oscillator is tuned across the band, causing the modulation index to be either higher or lower than the situation where no RF coupling is present. Thus the modulation index will vary as the device is tuned from one channel to another. For VHF and other applications below 500MHz, oscillator coupling is not such an issue, however similar care should still be taken with the layout in order to maximise device performance. Use of a Balun It is possible to further improve device performance with the use of a balun to remove the effects of common mode coupling. Although using a balun will add to component cost, it may be the best way to achieve maximum performance at higher frequencies where common mode noise has made it impossible to achieve the required SNR or dynamic range in the output signal. A low cost balun wound on a ferrite bead former should be sufficient to provide adequate performance in the majority of applications. Sound Tank Circuit It is recommended that the sound tank shown in Figure 4 is used. For PAL G, NTSC or SECAM applications, the value of the inductor may be modified to achieve the required subcarrier frequency. The tank circuit can be tuned between 4MHz and 7MHz. The sound subcarrier is automatically gain controlled to a value which gives a 16dB picture-to-sound carrier ratio when the SL5162 is set to negative modulation. The audio input signal is AC coupled through pin 11. The FM sensitivity of the of the sound section is 0·7kHz/mV, therefore a 140mVp-p input signal should give a 650kHz deviation of the sound subcarrier. Stereo Sound For stereo applications, a previously modulated second subcarrier should be input via the SUB 2 input (pin 13). For example, with the German Panda system, this would normally be at 5·74MHz. An input level of 200mV p-p should provide the required picture carrier/sound carrier ratio of 22dB. Video Modulation/Standard Selection The SL5162 may be switched between negative and positive modulation standards via MSS, pin 14. This configures both the sense of video modulation (negative or positive), and switches the modulation on the sound subcarrier to AM when positive video modulation is selected. These standards are switched as shown in Table 3. To ensure reliable startup over the entire VCC range it is recommended that the sound tank circuit is started via an effective pulse from the I2C bus synthesiser used in the system. This is shown in the demonstration board circuit, Figure 4. To do this, one of the SL5162 open collector outputs is initially turned on. This is then released when the mode selection (PAL/NTSC or SECAM) is made or at any other convenient point (e.g. when frequency data is sent) in PAL/NTSC mode. As an example, to synthesise 471·25MHz send the data words as shown in Table 4. Care must be taken to ensure that the MSS pin is adequately decoupled as close to the pin as possible. The routing of any control line to this pin should also be layed out to ensure MSS pin voltage Video modulation Audio modulation 0V Negative FM 5V Positive AM Table 3 Data word C2 Description Address synthesiser maximum separation from the LO components whilst still remaining as short as possible. In PAL/NTSC (mono) applications, pin 13 (SUB 2) may be left open circuit or decoupled to ground via a 1nF capacitor. In SECAM (mono) applications pin 13 must be directly connected to VCC to disable the intercarrier sound circuitry. For optimum performance it is recommended that in single ended output applications, pin15 is used for positive modulation, and pin 16 used for negative modulation. Test Signal Generator (TSG) A TSG is provided which may be enabled by connecting a 500kHz ceramic resonator via a 56pF capacitor to the TSG pin (pin 18) as shown in Figure 4. The TSG is disabled by connecting pin 18 to ground. The waveform that the TSG produces (shown in Figure 3) will create two white bars on a standard TV screen. It should be noted that standard (video) modulation depth specification for the SL5162 in its normal application does not apply to the TSG facility, since it is only intended as a tuning or test mode. AGC/White Clip 1D MSB frequency information 74 LSB frequency information CE Charge pump high mode, standard operation B0 Turn on port 5 to switch sound tank on CE Resend of byte 4 10 Turn on port 5, turn off port 4 (to configure SL5162 to PAL/NTSC operation) STOP Stop bit (if required) Table 4 The SL5162 is provided with an AGC circuit which should ensure correct modulation depth provided a composite video signal between 0·5V and 1·5V sync tip to peak white is applied to the VIDEO input, pin 19. If desired, the AGC may be disabled and a white clip circuit switched in to prevent overmodulation. This clipping level is set to a nominal 17% above peak white level, thus ensuring that even with a standard PAL I 95% saturated, 100% amplitude colour bars test signal, no clipping should take place. The AGC is enabled by connecting the pin 20 to Ground via a 150nF capacitor; white clip is enabled by connecting a 1·6kΩresistor from pin 20 to ground. Circuit ref. Value Type Circuit ref. Value Type R1 22kΩ Surface mount 1206 C11 10nF Surface mount 1206 R2 22kΩ Surface mount 1206 C12 10nF Surface mount 1206 R4 10kΩ Surface mount 1206 C13 150pF Surface mount 1206 R5 22kΩ Surface mount 1206 C14 33nF Surface mount 1206 R7 47kΩ Surface mount 1206 C15 47µF Electrolytic 0·1 inch pitch R8 1·6kΩ Surface mount 1206 C16 150nF Surface mount 1206 (X7R) R9 75Ω Surface mount 1206 C17 680nF 0·2 inch pitch leaded capacitor R10* 75Ω Surface mount 1206 C18 56pF Surface mount 1206 R11* 0Ω Surface mount 0805 C19 10nF Surface mount 0805 R12 0Ω Surface mount 1206 C20 10nF Surface mount 0805 R13 10kΩ Surface mount 1206 C21 100pF Surface mount 1206 C1 18pF Surface mount 0805 100V COG C22 1µF Electrolytic 0·1 inch pitch C2 100pF Surface mount 1206 C23 10nF Surface mount 1206 C3 100pF Surface mount 1206 C24 220nF Surface mount 1206 C4 220nF Surface mount 1206 C25 100pF Surface mount 1206 C5 47nF Surface mount 1206 C26 100pF Surface mount 1206 C6 10nF Surface mount 1206 C27 1·5pF Surface mount 0603 BB515 varactor diode C7 C28 1·5pF Surface mount 0603 C8 5·6pF Surface mount 0805 C29 1·5pF Surface mount 0603 C9 100pF Surface mount 0805 C30 1·5pF Surface mount 0603 C10 10nF - Surface mount 1206 *Not fitted contd… Table 5 SL5162 demonstration board components parts list 5 SL5162 Circuit ref. Type Value Type Circuit ref. Value SK1-4 - BNC straight square socket TR1 P1-2 - 3-way PCB header L1 5·6µH P5 - 2-way PCB header L2 - 1 turn 5mm diameter 22 SWG LK1 - Link L3 - 2 turns 5mm diameter 22 SWG SW1 - 23SPST DIL switch X1 IC1 - Mitel SP5611 X2 IC2 - Mitel SL5162 - NPN transistor, BCW31, SOT23 4MHz TOKO choke IQD crystal 500kHz Ceramic resonator Table 5 SL5162 demonstration board components parts list (continued) 130V 15V P1 C15 47µ C24 220n C14 33n C3 47n C2 220n R2 22k R7 22k X1 C1 4MHz 18p P2 DATA GND CLOCK C3 100p 1 16 2 15 3 14 4 IC1 13 SP5611 5 C2 100p 12 6 11 7 10 8 9 TR1 BCW31 15V R4 10k C12 10n C6 10n C25 100p SW1/P3 R5 22k R8 1·6K C10 10n C11 10n C23 10n C26 100p R13 10k C27 C7 BB 515 C9 100p C8 5·6p L2 1T C16 150n 1 20 2 19 3 18 4 17 5 IC2 16 SL5162 C17 680n 1·5p C30 1·5p 1·5p 6 15 7 14 8 13 9 12 10 11 SK2 C19 100p C20 100p R10 75 C21 100p 15V C22 1µ Figure 5 Demonstration board layout 6 RF O/P SK4 SUB 2 P5/LK1 SK3 C13 150p Figure 4 SL5162 demonstration board VIDEO I/P 15V R7 47k L1 5·6µH SK1 R9 75 SW1/ P4 1·5p C28 L3 2T C29 C18 X2 56p 500kHz AUDIO I/P SL5162 130V 15V 220n 47µ 33n 47n 22k 220n 15V 10k 22k 4MHz 18p SDA SCL 100p 1 16 2 15 3 14 4 IC1 13 SP5611 5 100p 10n BCW31 10n 22k 10n 10n 12 11 7 10 8 20 2 19 3 18 680n BB 515 9 1T 4 17 5 IC2 16 SL5162 2T 1·5p 6 5·6p 75 100p 1·5p 100p VIDEO I/P 56p 500kHz 1·5p 10n 6 150n 1 RF O/P 75 15 1·5p 7 14 8 13 9 12 10 11 100p 47k 5·6µH 15V 150p AUDIO I/P 1µ Figure 6 PAL (mono) application VCC 50 VCC VCC 50 120 1 120 VREF 6 5k 2 5k 4 5 7 1mA RF oscillator Prescaler outputs VCC 1k 1k VCC VCC 9 10 20 AGC Sound tank Figure 7 I/O interface circuits contd… 7 SL5162 10k VREF 10k 11 13 VREF 5p 1mA 25k Audio input 2nd subcarrier input VCC VCC VCC 60k 60k 48 15 50k 48 14 16 50 50 60k 45k 75Ω modulated outputs MSS video mod/standard select VCC VCC 50 60k 1·25mA 1·25mA 2k 6k 8k 19 6k 5·6k 18 250µA 250µA 6k Test signal generator Video input Figure 7 I/O interface circuits (continued) Internet: http://www.mitelsemi.com CUSTOMER SERVICE CENTRES ● FRANCE & BENELUX Les Ulis Cedex Tel: (1) 69 18 90 00 Fax: (1) 64 46 06 07 ● GERMANY Munich Tel: (089) 419508-20 Fax: (089) 419508-55 ● ITALY Milan Tel: (02) 6607151 Fax: (02) 66040993 ● JAPAN Tokyo Tel: (03) 5276-5501 Fax: (03) 5276-5510 ● KOREA Seoul Tel: (2) 5668141 Fax: (2) 5697933 ● NORTH AMERICA Scotts Valley, USA Tel: (408) 438 2900 Fax: (408) 438 5576/6231 ● ● ● ● SOUTH EAST ASIA Singapore Tel: (65) 333 6193 Fax: (65) 333 6192 SWEDEN Stockholm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36 TAIWAN, ROC Taipei Tel: 886 2 25461260 Fax: 886 2 27190260 UK, EIRE, DENMARK, FINLAND & NORWAY Swindon Tel: (01793) 726666 Fax: (01793) 518582 These are supported by Agents and Distibutors in major countries worldwide. © Mitel 1998 Publication No. DS4497 Issue No. 3.0 September 1998 TECHNICAL DOCUMENTATION – NOT FOR RESALE. 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These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request. All brand names and product names used in this publication are trademarks, registered trademarks or trade names of their respective owners. 8 For more information about all Zarlink products visit our Web Site at www.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively “Zarlink”) is believed to be reliable. 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Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink’s conditions of sale which are available on request. Purchase of Zarlink’s I2C components conveys a licence under the Philips I2C Patent rights to use these components in and I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright Zarlink Semiconductor Inc. All Rights Reserved. TECHNICAL DOCUMENTATION - NOT FOR RESALE