SFSL5.5MDB YAMAR [Yamar Electronics Ltd.], SFSL5.5MDB Datasheet - Page 7

• Manufacturer Part Number: SFSL5.5MDB
• Description: Smart Slave for DC-BUS Powerline Network
• Manufacturer: YAMAR [Yamar Electronics Ltd.]

3.3
3.2 Ceramic Filter
3.4
The SIG61 can operate with a single ceramic filter for transmission and reception. If, however,
switching between two channels is desired, two ceramic filters will be required. The minimum allowable
3dB bandwidth of the ceramic filters is ±70 kHz. Choosing a narrower bandwidth shall limit the
maximum achievable bit rate.
The SIG61 selectable carrier frequencies are chosen in accordance with ceramic filter values available
in the market.
The SIG61 is designed to operate with a low cost 4MHz crystal connected between OscIn and
OscOut pins. Each of these pins should be connected to the ground via a capacitor. All the
corresponding PCB traces should be as short as possible.
Recommended crystals are:
The values of C1, and C2 in Figure 3.3, pertaining to the oscillator circuitry, should be determined
according to the crystal manufacturer recommendations. Values between 0pF and 4.7pF may serve as
good starting point.
The overall frequency tolerance should not exceed 200ppm.
The maximum cable length between two devices depends mainly on the AC impedance of loads
connected to that line and number of nodes. The DC cable length has less effect on communication.
The SIG61 requires a minimum received signal of 20mVpp for proper reception.
Nominal
© 2010 Yamar Electronics Ltd.
Preliminary and proprietary Information of YAMAR Electronics Ltd. Subject to change without notice.
[MHz]
**10.50
**13.00
freq.
* 1.75MHz can operate only at 9.6Kbps
** 10.5MHz and 13.00MHz can operate at 115.2Kbps instead of 9.6Kbps.
1. NDK AT-51 GW.
2. Epson MA-506.
*1.75
*1.75
4.50
5.50
6.00
6.50
Oscillator
Communication performance
3 dB BW
±70
±80
±80
±80
±150
±280
[KHz]
[KHz]
20dB
750
750
750
800
BW
Insertion
loss
[dB]
6.0
6.0
6.0
6.0
4.5
4.5
attenuation
Stop band
[dB]
30
30
30
30
7
imped.
In/Out
[ ]
1000
600
470
470
330
330
Discrete
SFSL4.5MDB
SFSL5.5MDB
SFSL6.0MDB
SFSL6.5MDB
SFELF10M5JAA001-B0
Discrete filter for 115.2Kbps
SFELK13M0JA00-B0
Discrete
Murata
part #
DS-SIG61 R0.932
Oscilent
773-0045
773-0055
773-0060
773-0065
part #