View SL5162_340624.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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 RF2 VCC2 LOIN1 LOOP1 LOOP2 LOIN2 VEE2 ST1 ST2
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16
AGC VIDEO TSG VEE1 OP2 OP1 MSS SUB2 VCC1 AUDIO
SL5162
15 14 13 12 11
MP20 FEATURES s Covers both Negative and Positive Modulation Systems s Internal AGC with Disable s Control of Sound and Video Standard via Single Pin s Symmetrical 75 RF Outputs for Low Radiation s Audio Input with AM/FM Sound Modulator s Switchable Video Test Signal Generator (TSG) s Intercarrier Input for Second Sound Channel s ESD Protection
PRESCALER OUTPUTS
5 6
Figure 1 Pin connections - top view
ORDERING INFORMATION
SL5162/KG/MP1S Miniature plastic package SL5162/KG/MP1T Tape and reel
ABSOLUTE MAXIMUM RATINGS
Storage temperature Junction temperature Ambient temperature Supply Voltage Voltage at any other pin 255C to1150C 220C to1150C 210C to180C 20*3V to17*0 V 20*3V to17*0V
UHF OSC
1
2
UHF MIXER
15 16
UHF TANK
4 7
MODULATED OUTPUTS
SUBCARRIER 2
13
FM CLAMP AUDIO OSC AGC MIXER DRIVER FM/AM SELECT
9 10
VIDEO INPUT 75
19
SOUND TANK
11 20
AUDIO INPUT MODE SELECT TSG
AGC CLIP
OFFSET ADJUST
14
CLIP
TSG ENABLE
18
LOGIC
Figure 2 Block diagram
SL5162
ELECTRICAL CHARACTERISTICS
TAMB = 125C (operating range 210C to180C), 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 Supply Voltage Supply current Video Input Video input level (VP) 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 Intercarrier Input Input level FM Performance Audio input for 100% deviation (635kHz) FM deviation sensitivity Max frequency deviation 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 Sync Tip Negative modulation Positive modulation Sync degradation (1ve mod) Pin Min. 3, 12 3, 12 19 4*5 45 1*0 0*5 1*17 100 10 25 60 1*5 Value Typ. Max. 5*5 53 V mA Vp-p Vp-p V k MHz MHz dB % deg % mV k kHz MHz % 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 Units Conditions
62 62 62
CCIR Rec 451-1 (note 3), mono sound system
65 65 0*5 5
Dependent upon video input clamp capacitor VP=1*0V D (black level with and without input video)
11 25 15 4 0*5 13 140 11 100 0*7 250 11 80 .46 1, 2 83 84 2 62 1, 2 12 1,2 100 6 1 % % % All systems DSYNC1(16 S 3 7 3100) W3 17 22 % Relative to peak vision carrier (PVC), VP = 1*0V, all systems (note 4) dBV VP = 1*0V, sync = 0*3V dBV Differential 75 output dB % APL 10-90% % dB Input = 200mVp-p at 1kHz mVp-p At device input kHz/mV Audio input 1kHz sinewave kHz No pre-emphasis, dependent on external components mVp-p To define 222dBC (peak carrier) 7 1*0
Determined by external components. In demodulated signal. Input signal =1 kHz sinewave at 635kHz deviation
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 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 Value Typ. Max. Units Conditions
216 215 222 23 500 30
dBC dBC dBC k
Relative to PVC (note 4) Relative to PVC, with no audio modulation applied Relative to PVC
mVp-p Single ended from 50 Values referred to PAL system G carrier level Note 5
270 270 270 275 270 270 210 210 260 246 38*9 860 0*2
dBC dBC dBC dBC dBC dBC dBC dBC dBC dBC MHz kHz
Relative to 83dBV 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 1 2 3 4 5 6 7 8 9 1o 11 12 13 14 15 16 17 18 19 20
Name 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
Function 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 75 modulated output 75 modulated output Baseband ground Test signal generator input Video input AGC capacitor/disable switch
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.
Table 1 Pin descriptions
3
SL5162
Standard NTSC (M) PAL (G) PAL (I) SECAM (L) Negative Negative Negative Positive Video Modulation Mod. index (%) SC freq. (MHz) 83 83 83 94 4*5 5*5 6*0 6*5 Sound Modulation FM FM FM AM Pre-emphasis (s) 75 50 50 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.
64s WHITE
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.
4 s
20 s 4 s
12 s 4 s
20 s
BLACK
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.
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.
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.
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
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
4
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 0V 5V Video modulation Negative Positive Audio modulation FM AM 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.
Table 3
Data word C2 1D 74 CE B0 CE 10
Description Address synthesiser MSB frequency information LSB frequency information Charge pump high mode, standard operation Turn on port 5 to switch sound tank on Resend of byte 4 Turn on port 5, turn off port 4 (to configure SL5162 to PAL/NTSC operation)
AGC/White Clip
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*6kresistor from pin 20 to ground. Circuit ref. C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 Value 10nF 10nF 150pF 33nF 47F 150nF 680nF 56pF 10nF 10nF 100pF 1F 10nF 220nF 100pF 100pF 1*5pF 1*5pF 1*5pF 1*5pF Type Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 1206 Electrolytic 0*1 inch pitch Surface mount 1206 (X7R) 0*2 inch pitch leaded capacitor Surface mount 1206 Surface mount 0805 Surface mount 0805 Surface mount 1206 Electrolytic 0*1 inch pitch Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 0603 Surface mount 0603 Surface mount 0603 Surface mount 0603
STOP Stop bit (if required)
Table 4
Circuit ref. R1 R2 R4 R5 R7 R8 R9 R10* R11* R12 R13 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 *Not fitted Value 22k 22k 10k 22k 47k 75 75 0 0 10k 18pF Type Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 1206 Surface mount 0805 Surface mount 1206 Surface mount 1206 Surface mount 0805 100V COG
1*6k Surface mount 1206
100pF Surface mount 1206 100pF Surface mount 1206 220nF Surface mount 1206 47nF 10nF 5*6pF 10nF Surface mount 1206 Surface mount 1206 BB515 varactor diode Surface mount 0805 Surface mount 1206
100pF Surface mount 0805
contd...
Table 5 SL5162 demonstration board components parts list
5
SL5162
Circuit ref. SK1-4 P1-2 P5 LK1 SW1 IC1 IC2 Value Type BNC straight square socket 3-way PCB header 2-way PCB header Link 23SPST DIL switch Mitel SP5611 Mitel SL5162 Circuit ref. TR1 L1 L2 L3 X1 X2 Value 5*6H 4MHz TOKO choke 1 turn 5mm diameter 22 SWG 2 turns 5mm diameter 22 SWG IQD crystal Type NPN transistor, BCW31, SOT23
500kHz Ceramic resonator
Table 5 SL5162 demonstration board components parts list (continued)
130V P1 C24 220n C3 47n C2 220n R7 22k X1 C1 4MHz 18p
1 2 16 15 14
15V C15 47 R2 22k C14 33n
15V C12 10n C25 100p C10 10n C11 10n
1 2 3 20 19 18 17
TR1 BCW31
R4 10k SW1/P3 C6 10n R5 22k R8 1*6K
C16 150n C17 680n C18 X2 56p 500kHz SW1/ P4 C19 100p C20 100p R10 75 15V C21 100p 15V P5/LK1 SK3 C22 1 SK4 SUB 2 R9 75 SK2 SK1 VIDEO I/P
P2 DATA GND CLOCK C3 100p C2 100p
3 4 5 6 7 8
IC1 13 SP5611
12 11 10 9
C23 10n
C26 100p R13 10k C7 BB 515 C9 100p C8 5*6p
C27 L2 1T C28 L3 2T C29 C30 R7 47k
1*5p
4
1*5p
5
1*5p
6
IC2 16 SL5162
15 14 13 12 11
RF O/P
1*5p
7 8
L1 5*6H
9
C13 150p
10
AUDIO I/P
Figure 4 SL5162 demonstration board
Figure 5 Demonstration board layout
6
SL5162
130V 220n 47n 220n 22k 4MHz 18p
1 2 3 16 15 14
15V
47
33n
22k 10k BCW31 10n 22k
15V 10n
10n
1 2 20 19 18 17
150n 680n 56p 500kHz 100p 75 100p 15V AUDIO I/P RF O/P 75 VIDEO I/P
SDA SCL 100p 100p
4 5 6 7 8
IC1 13 SP5611
12
10n 10n 1*5p BB 515 1T 100p 2T 5*6p 47k 1*5p 1*5p
3 4
11 10 9
1*5p
5 6 7 8 9
IC2 16 SL5162
15 14 13 12 11
5*6H
150p
10
1
Figure 6 PAL (mono) application
VCC
VCC
VCC
50
50 120 1 2 6 5k 4 VREF 5k 5 7 120
1mA
Prescaler outputs
VCC 1k 9 10 1k
RF oscillator
VCC
VCC
20
Sound tank
Figure 7 I/O interface circuits
AGC
contd...
7
SL5162
10k VREF 10k 13 1mA 25k 11 5p VREF
2nd subcarrier input
VCC VCC
Audio input
VCC 60k 60k
48 15 48 16 50 50 60k 1*25mA 1*25mA 45k 60k 50k 14
75 modulated outputs
VCC 50 2k 6k
MSS video mod/standard select
VCC 8k
19 6k 5*6k
18 250A 6k 250A
Video input
Test signal generator
Figure 7 I/O interface circuits (continued)
Internet: http://www.mitelsemi.com
CUSTOMER SERVICE CENTRES q FRANCE & BENELUX Les Ulis Cedex Tel: (1) 69 18 90 00 Fax: (1) 64 46 06 07 q GERMANY Munich Tel: (089) 419508-20 Fax: (089) 419508-55 q ITALY Milan Tel: (02) 6607151 Fax: (02) 66040993 q JAPAN Tokyo Tel: (03) 5276-5501 Fax: (03) 5276-5510 q KOREA Seoul Tel: (2) 5668141 Fax: (2) 5697933 q NORTH AMERICA Scotts Valley, USA Tel: (408) 438 2900 Fax: (408) 438 5576/6231
q q q q
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.
(c) Mitel 1998 Publication No. DS4497 Issue No. 3.0 September 1998 TECHNICAL DOCUMENTATION - NOT FOR RESALE. PRINTED IN UNITED KINGDOM
This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company reserves the right to alter without prior notice the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. 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. trading as Zarlink Semiconductor or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. 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 an I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2002, Zarlink Semiconductor Inc. All Rights Reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE

▲Up To Search▲

Price & Availability of SL5162

	To Download SL5162 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .