SL6649-1/KG/MPES [ZARLINK]
Paging Receiver, Bipolar, PDSO28, PLASTIC, SOP-28;
| 型号： | SL6649-1/KG/MPES |
| 厂家： | 
ZARLINK SEMICONDUCTOR INC |
| 描述： | Paging Receiver, Bipolar, PDSO28, PLASTIC, SOP-28 |
| 文件： | 总14页 (文件大小：420K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
This product is obsolete.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/
3115 - 4.1
SL6649-1
200MHz DIRECT CONVERSION FSK DATA RECEIVER
The SL6649-1 is a low power direct conversion radio
receiver for the reception of frequency shift keyed
transmissions. It features the capability of 'power down' for
battery conservation.
1
2
3
4
5
6
7
8
28
27
26
25
24
23
22
21
20
19
18
17
16
15
The device also includes a low battery flag indicator.
FEATURES
I Very Low Power Operation - typ. 3.7mW
I Single Cell Operation with External Inverter
I Complete Radio Receiver in One Package
I Operation up to 200MHz
9
10
11
12
13
14
I 100nV Typical Sensitivity
I Operates up to 1200 BPS
MP28
I On Chip Tunable Active Filters
I Minimum External Component Count
I Low Power Down Current Typical 5µA
PIN DESCRIPTION
PIN DESCRIPTION
1
2
3
4
5
6
7
8
GND
BATTERY ECON
GYRATOR CURRT ADJ
REF VOLTAGE
BANDGAP REF VOLT
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CHANNEL B TEST.
LO INPUT CHANNEL B
LO INPUT CHANNEL A
VCC1 (MIXER)
MIXER I/P A
MIXER I/P B
CHANNEL A TEST
LO CURRENT SOURCE
RFA II (EMIT) RF DEC
RFA II (BASE) RF INPUT
RF DEC
APPLICATIONS
I Low Power Radio Data Receiver
I Wristwatch Credit Card Pager
I Radio Paging
VCC2
BIT RATE FILTER
DATA OUTPUT
GND
NC
NC
NC
I Ultrasonic Direction Indication
I Security Systems
9
10
11
12
13
14
I Remote Control Systems
RF O/P
BATT FLAG INPUT
BATT FLAG OUTPUT
COLPITTS OSC O/P DISABLE
NC
ABSOLUTE MAXIMUM RATINGS
N.B. It is advisable to connect NC pins to ground.
Supply Voltage
6V
-55°C to +150°C
-20°C to +70°C
Storage Temperature
Operating Temperature
Figure 1: Pin Connections - Top View
ORDERING INFORMATION
SL6649-I/KG/MPES - Small outline (MP28) supplied in tubes
SL6649-1/KG/MPEF - Small outline (MP28)
supplied in tape & reel
SL6649-1
ELECTRICAL CHARACTERISTICS
These characteristics are guaranteed over the following conditions (unless otherwise stated).
T
amb = 25°C, VCC1 = 2.5V, VCC2 = 3.5V
Value
Typ
Characteristic
Pin
Min
Max
Units
Conditions
Supply Voltage VCC
Supply Voltage VCC
Supply Current lCC1
1
2
25
6,16
17, 25,
26, 27
6,16
17, 21, 25,
26, 27
6,16
VR
1.8
1.3
2.3
1.6
2.8
3.5
2.0
V
V
mA
VCC1 ≤ (VCC2)-0.7
(IRF) Included
Batt Econ Low
Batt Econ Low
Supply Current ICC2
Power Down lCC1
0.65
5
0.80
12
mA
µA
Power Down lCC2
Bandgap Reference
Voltage Reference
3
1.22
1.0
12
1.35
1.13
µA
V
V
5
4
1.15
0.93
RF Amplifier
Supply Current (IRF
Power Down
)
17
17
430
32
535
640
38
µA
µA
Included in Power Down ICC1
Mixers
Gain to “IF Test”
dB
L.O. inputs driven in parallel
with 50mV RMS @ 50MHz.
IF = 2kHz
Oscillator
Current Source
Power Down
21
21
215
270
330
40
µA
µA
Included in Power Down lCC1
Decoder
Sensitivity
µVrms
Signal injected at “IF TEST”
B.E.R. ≤1 in 30
5kHz deviation @ 500 bits/sec
BRF capacitor = 1nF
Output Mark Space Ratio
Output Logic High
Output Logic Low
8
8
7:9
85
9:7
15
%VCC2
%VCC2
Battery Economy
Input Logic High
Input Logic Low
Input Current
2
2
(VCC2)-0.3
V
V
µA
Powered Up
Powered Down
0.3
1
0.05
Battery Flag
Output High Level
Output Low Level
Flag trig Level
14
14
13
85
%VCC2
%VCC2
V
Battery Low RL > 1MΩ
Battery High RL > 1 MΩ
Voltage Reference (VR) pin 4
15
VR+25mV
VR-25mV
Colpitts Oscillator
Frequency
15
kHz
kHz
R=90K, pin 3 to GND
R=360K, pin 3 to GND
15
2
SL6649-1
TYPICAL ELECTRICAL CHARACTERISTICS
These characteristics are guaranteed by design.
T
amb = 25°C, VCC1 = 2.5V, VCC2 = 3.5V
Value
Typ
Characteristic
Pin
Min
Max
Units
Conditions
RF Amplifier
Noise Figure
Power Gain
5.5
14
dB
dB
RS = 50Ω
Input Impedance
19
See Fig. 8
Mixer
RF Input Impedance
LO Input Impedance
LO DC Bias Voltage
23, 24
26, 27
26, 27
See Figs. 9 (a) and (b)
See Fig. 10
Equal to pin 25
V
Detector
Output Current
7
4
µA
Colpitts Oscillator
Frequency
Output Voltage
16
16
15
20
kHz
mVp-p
R = 270K, Pin 3 to GND
RL >> 1MΩ N.B. Refer to Channel
Filter Fig. 4
RECEIVER CHARACTERISTICS (GPS DEMONSTRATION BOARD)
Measurement conditions (unless otherwise stated): Applications circuit diagram Fig.6; VCC1 = 1.3V; VCC2 = 2.3V; Tamb
=
25°C; Colpitts oscillator resistor = 270kΩ; mixer input A and B phase balance = 180°; local oscillator input A and B phase
balance = 90°. Measurement methods as described by CEPT Res 2 specification. FIN = 153MHz (512 baud).
Value
Characteristic
Min
Typ
Max
Units
Conditions
Terminal Sensitivity Tone
only 4/5 call reception
-127
-124
dBm
∆f = 4.5kHz, RS = 50Ω
Deviation Acceptance
2.5
2.5
70
kHz
kHz
dB
3dB De-Sensitisation. FIN = FLO
Centre Frequency Acceptance
Adjacent Channel Rejection
2.0
65
∆f = 4.5kHz
∆f = 4.5kHz Channel Spacing
25kHz
Adjacent + 1 Channel Rejection
Third Order Intermod adj-1 + adj-2
65
52
70
53
dB
dB
External capacitors on test
pins A and B.
Figure 2: Block Diagram of SL6649-1 Direct Conversion Receiver
3
SL6649-1
PRINCIPLE OF OPERATION
The incoming signal is split into two parts and frequency
converted to baseband. The two paths are produced in phase
quadrature (see Fig 2) and detected in a phase detector which
provides a digital output. The quadrature network must be in
the local oscillator path.
At a data rate of 512 baud and a deviation frequency of
4.5kHz, the input to the system has a demodulation index of 18.
This gives a spectrum as in Fig 3. f1 and f0 represent the ‘steady
state’ frequencies (i.e. modulated with continuous ‘1’ and ‘0’
respectively). The spectrum in Fig 3 is for reversals (a
0-1-0-1-0-1 etc. pattern) at the system bit rate; fC is the nominal
carrier frequency).
When the LO is at the nominal carrier frequency, then a
continuous ‘0’ or ‘1’ will produce an audio frequency, at the
output of the mixers corresponding to the difference between f0
and fC or f1 and fC. If the LO is precisely at fc, then the resultant
output signal will be at the same frequency regardless of the
data state; nevertheless, the relative phases of the two paths
will reverse between ‘0’ and ‘1’ states. By applying the amplified
outputs of the mixers to a phase discriminator, the digital data is
reproduced.
Figure 3: Spectrum Diagram
TUNING THE CHANNEL FILTERS
k
The adjacent channel rejection performance of the
SL6649-1 receiver is determined by the channel filters. To
obtain optimum adjacent channel rejection, the channel filters’
cut off frequency should be set to 8kHz. The process tolerances
are such that the cut off frequency cannot be accurately
defined, hence the channel filters must be tuned. However the
receiver characteristics on the previous page can be achieved
with a fixed 270kΩ resistor between pin 3 and GND.
Tuning is performed by adjusting the current in the gyrator
circuits. This changes the values of the gyrator’s equivalent
inductance. The cut off frequency is tuned to 8kHz. To
accurately define the cut off of the channel filters, a gyrator
based Colpitts oscillator circuit has been included on the
SL6649-1. The Colpitts oscillator and channel filters use the
same type of architecture, hence there is a direct correlation
between oscillator frequency and cut off frequency. By knowing
the Colpitts oscillator frequency the channel filter cut off
frequency can be estimated from Figure 4.
k
Figure 4
k
Once the channel filters have been tuned it may be
necessary to disable the Colpitts oscillator. The Colpitts
oscillator is disabled by connecting the Colpitts oscillator
output/disable pin (pin # 16) to VCC2. This is needed since the
Colpitts oscillator may impair the performance of the receiver.
Figure 5: Channel Filter Response
4
Figure 6: Block Diagram and Applications Circuit (for component values see next page)
SL6649-1
COMPONENTS LIST FOR FIGURE 6
Capacitors
Resistors
Inductors
Transformers
Miscellaneous
C1 1nF
C2 1nF
C3 1nF
C4 5.6pF C14 1nF
C5 1nF C15 10pF
C6 2.2µF C16 1nF
C11 1nF
C12 1nF
C13 10pF
R1 2.2kΩ
L1 10µH
L2 220nH
L3 150nH
L4 100nH
T1 1:1 Transformer
Primary/Secondary
Inductance=200nH
IC1 SL6649-1
R2 500kΩ Variable
R4 100Ω
TR1 SOT-23 Transistor
with fτ ≥ 1.3GHz
(EG. ZETEX BFS 17)
X1 153MHz 7th
overtone crystal
VC2 1.5-10pF
R5 100Ω
R6 100Ω
R7 100Ω
C7 1nF
C8 1nF
C17 5.6pF
C18 4.7pF
R8 100KΩ
C9 2.2µF C19 1nF
C10 2.2µF C20 1nF
Figure 7: Pinning Diagram of the SL6649-1
6
SL6649-1
FREQ
S11
S12
S22
S21
MHz
MAG.
0.963
0.949
0.934
0.906
0.876
0.846
0.816
0.781
0.746
0.700
0.655
ANG.
MAG.
0.016
0.017
0.017
0.021
0.025
0.029
0.032
0.039
0.045
0.062
0.079
ANG.
MAG.
1.036
0.991
0.946
0.938
0.934
0.925
0.915
0.872
0.827
0.771
0.716
ANG.
MAG.
1.460
1.390
1.321
1.261
1.201
1.132
1.061
0.986
0.910
0.854
0.798
ANG.
100.000
150.000
200.000
250.000
300.000
350.000
400.000
450.000
500.000
550.000
600.000
-15.971
-21.603
-27.247
-33.835
-40.519
-45.789
-50.979
-58.616
-66.363
-72.624
-78.856
120.281
121.732
123.174
124.612
126.042
139.335
153.381
163.051
172.537
165.197
157.518
-3.440
157.948
142.732
127.508
115.531
103.830
95.446
87.270
78.111
68.910
65.157
61.518
-5.524
-7.608
-10.156
-12.744
-14.380
-15.955
-18.015
-20.094
-19.691
-19.231
Figure 8: RF Amplifier
7
SL6649-1
S11
FREQ.
MAG.
0.943
0.929
0.914
0.904
0.895
0.866
0.836
0.796
0.756
0.726
0.696
ANG.
100.000
150.000
200.000
250.000
300.000
350.000
400.000
450.000
500.000
550.000
600.000
-14.921
-21.059
-27.208
-35.234
-43.439
-52.138
-60.882
-68.177
-75.417
-82.654
-89.883
Figure 9a: SL6649-1 Mixer RF input pin 23
S11
FREQ.
MAG.
0.963
0.953
0.944
0.930
0.915
0.891
0.866
0.846
0.826
0.806
0.786
ANG.
100.000
150.000
200.000
250.000
300.000
350.000
400.000
450.000
500.000
550.000
600.000
-10.019
-15.143
-20.277
-20.764
-20.853
-30.479
-40.734
-46.135
-51.344
-57.057
-62.785
Figure 9b: SL6649-1 Mixer RF input pin 24
S11
FREQ.
MAG.
0.993
0.983
0.974
0.960
0.945
0.954
0.946
0.927
0.907
0.877
0.847
ANG.
100.000
150.000
200.000
250.000
300.000
350.000
400.000
450.000
500.000
550.000
600.000
-11.020
-16.144
-21.277
-27.820
-34.499
-39.765
-44.952
-52.586
-60.331
-67.086
-73.819
Figure 10: SL6649-1 Mixer LO input pins 26 and 27
8
SL6649-1
METHOD FOR THE MEASUREMENT OF SENSITIVITY ON THE SL6649-1 RECEIVER
The method used by GEC Plessey Semiconductors in the measurement of terminal sensitivity is essentially the same as that
described in the CEPT Res 2 Specification.
This method requires the following equipment:
1. A signal generator e.g. HP8640
2. A pocsag encoder
3. A pocsag decoder e.g. MV6639
4. An SL6649-1 Demo Board.
5. An interference free low impedance P.S.U. (VCC1 and VCC2 must be separate supplies and there must be at least 0.7V
difference between them). Recommended supply configurations are shown in Fig. 13.
The test equipment and D.U.T. are set up as shown in Figure 11.
The R.F. frequency is set to the nominal L.O. frequency of the receiver and the peak deviation is set to 4.5kHz.
Care must be taken to avoid long power supply leads and any ground loops. Any interference from the decoder will be reduced
by the insertion of a high value resistor R1 (100KΩ) between the receiver data output and the decoder input.
Figure 11: Test System
The generator output level is reduced successively until the decoder responds just 4 out of 5 times to the encoder signal. This
output level is then recorded as the sensitivity threshold of the receiver.
We find that this threshold correlates to a bit error rate of 1 in 30. The data output waveforms for an input level which produces
a B.E.R. of 1 in 30 and for input levels 2dB above and below this level, are shown below (square wave input). It can be seen that
the edge jitter increases dramatically at signal levels below the sensitivity threshold of -127dBm. Typical waveforms that can be
seen on an oscilloscope around the sensitivity threshold level are shown in Figure 12.
NB. In performing the sensitivity measurement great care should be taken in preventing coupling between test leads.
Figure 12: Waveform at Data O/P
SL6649-1
PIN MNEMONIC
FUNCTION
PIN MNEMONIC
FUNCTION
1
2
3
4
5
6
7
8
GND
BEC
Gl
Vr
BG
Vc2
BR
DO
GND
Ground
15
16
UNC
Colpitts Oscillator
Output/Disable
RFA I (collector) RF Output
RFA I (base) RF Decouple
RFA II (base) RF Input
RFA II (emitter) RF Decouple
LO Current Source
Channel A Test
Mixer l/P B
Mixer l/P A
VCC1 (mixer)
LO Input Channel A
LO Input Channel B
Channel B Test
Battery Economy
Gyrator Current Adjust
Reference Voltage
Bandgap Reference Voltage
CO
17
18
19
20
21
22
23
24
25
26
27
28
RO
RDA
Rl
RDB
Ol
VCC 2
Bit rate Filter
Data Output
Ground
UNC
UNC
9
TA
10
11
12
13
14
MA
MB
VCIM
OA
OB
TB
UNC
Fl
FO
Battery Flag Input
Battery Flag Output
POWER SUPPLIES
(c) should be regarded as a test set up only.
Figure 13(a): SL6649-1 Power Supply Options
10
SL6649-1
PAGER APPLICATION EXAMPLE
A typical 1 volt pager system suitable as a wrist watch
application is shown in Figure 13 (b). Only 3 integrated circuits
are required to perform all the functions of a tone only pager.
These are SL6649-1 direct conversion radio receiver and the
MV6639 POCSAG decoder plus a 1 volt E2PROM (eg. Seiko
Epson SPM28C51).
The SL6649-1 receives and demodulates the data, and
monitors the battery voltage. The interface between the
decoder and receiver consists of only 3 connections excluding
the supplies.
The MV6639 performs all the functions required for a
POCSAG decoder for tone only and/or pager messaging at 512
or 1200 baud. A 32kHz watch crystal is used as the reference
frequency for the decoder.
The decoder voltage doubler output VCC2 is available to
power not only the receiver, but an alternative higher voltage
E2PROM and microprocessor/LCD driver for a full tone and
message pager.
Figure 13(b): Tone Pager Applications Example Showing Interface with SL6649-1 Receiver
OPERATION AT OTHER FREQUENCIES AND
DATA RATES
It is of course necessary to use a crystal of the required
frequency and stability. In order to use the receiver at higher
data rates it is only necessary to reduce the value of C8, for
example, at 1200bps, C8=470pf.
A demonstration board has been designed specifically to
demonstrate terminal sensitivity. It is possible to connect an
antenna to the board with suitable matching but no guarantee
can be given regarding field strength sensitivity. However, with
a suitably designed combination of PCB and antenna, a
sensitivity of 5µV/M should be attainable.
The values given in the components list for figure 6 are
appropriate for frequencies nominally around 153MHz. In order
to use the receiver at other frequencies it is necessary to
change the capacitor C4 which is resonant with the transformer
T1, and L2 and L4 in the oscillator circuit.
It is also necessary to change the values of capacitors C13
and C15 such that the reactance of these is equal to 100Ω at
the required frequency.
11
SL6649-1
PACKAGE DETAILS
Dimensions are shown thus: mm (in). For further package information, please contact your local Customer Service Centre.
0-8°
28
0·25/0·71
7·40/7·60
(0·291/0·299) (0·394/0·419)
10·00/10·64
(0·010/0·028)
SPOT REF.
×45°
0·41/1·27
(0·016/0·050)
CHAMFER
REF.
1
0·36/0·48
(0·014/0·019)
0·23/0·33
(0·009/0·013)
2·36/2·64
(0·093/0·104)
NOTES
0·74 (0·029)
MAX.
1. Controllingdimensionsareinches.
28 LEADS AT
1·27 (0·050)
NOM. SPACING
0·10/0·30
(0·004/0·012)
2. This package outline diagram is for guidance
only. Please contact your GPS Customer
ServiceCentreforfurtherinformation.
17·70/18·10
(0·697/0·713)
28-LEAD MINIATURE PLASTIC DIL - MP28
HEADQUARTERS OPERATIONS
CUSTOMER SERVICE CENTRES
GEC PLESSEY SEMICONDUCTORS
Cheney Manor, Swindon,
Wiltshire SN2 2QW, United Kingdom.
Tel: (01793) 518000
• FRANCE & BENELUX Les Ulis Cedex Tel: (1) 69 18 90 00 Fax : (1) 64 46 06 07
• GERMANY Munich Tel: (089) 3609 06-0 Fax : (089) 3609 06-55
• ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993
• JAPAN Tokyo Tel: (03) 5276-5501 Fax: (03) 5276-5510
Fax: (01793) 518411
• NORTH AMERICA Scotts Valley, USA Tel (408) 438 2900 Fax: (408) 438 7023.
• SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872
• SWEDEN Stockholm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36
• TAIWAN, ROC Taipei Tel: 886 2 5461260. Fax: 886 2 7190260
• UK, EIRE, DENMARK, FINLAND & NORWAY
GEC PLESSEY SEMICONDUCTORS
P.O. Box 660017
1500 Green Hills Road,
Scotts Valley, California 95067-0017,
United States of America.
Tel: (408) 438 2900
Swindon Tel: (01793) 518527/518566 Fax : (01793) 518582
These are supported by Agents and Distributors in major countries world-wide.
© GEC Plessey Semiconductors 1995 Publication No. 3115 Issue No. 4.0 September 1995
TECHNICAL DOCUMENTATION - NOT FOR RESALE. PRINTED IN UNITED KINGDOM.
Fax: (408) 438 5576
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.
For more information about all Zarlink products
visit our Web Site at
www.zarlink.com
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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
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