ZARLINK SL5162KGMP1T

Obsolescence Notice
This product is obsolete.
This information is available for your
convenience only.
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replacement product lists, please visit
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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)
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●
●
●
●
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These are supported by Agents and Distibutors in major countries
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© 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
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8
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