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AN2744 Datasheet(PDF) 14 Page - STMicroelectronics

Part # AN2744
Description  ST7538Q power line FSK transceiver
PDF  56 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2744 Datasheet(HTML) 14 Page - STMicroelectronics

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Board description
AN2744
14/56
5
Board description
The ST7538Q dual channel reference design is composed of the following sections:
– power supply section, based on ST’s VIPer12A-E IC
– ST7538Q modem and crystal oscillator section
– line coupling interface section, with three subsections:
–
dual channel transmission passive filter
–
dual channel reception passive filter
–
dual channel reception active filter
The board has also two connectors, which allow the user to plug the mains supply on one
side of the board and the IBU communication board on the other side.
The schematics of the whole reference design are given in the following pages. Figure 7
shows the modem and coupling interface circuits, while Figure 8 represents the power
supply circuit. In both schematics, high voltage regions are highlighted.
Table 3 lists the components used to develop the reference design board. All parts have
been selected to give optimal performances.
The layout of the printed circuit is shown in Appendix A - Figure 50 and Figure 51.
Figure 6.
Scheme of the various sections of the board
ST7538Q
Modem
Section
ST7538Q
ST7538Q
Modem
Modem
Section
Section
Dual Channel
TX Passive
Filter
Dual Channel
Dual Channel
TX Passive
TX Passive
Filter
Filter
Dual Channel
RX Passive Filter
Dual Channel
Dual Channel
RX Passive Filter
RX Passive Filter
Dual Channel
RX Active Filter
Dual Channel
Dual Channel
RX Active Filter
RX Active Filter
Power Supply
(with ST Viper 12A)
Power Supply
Power Supply
(with ST Viper 12A)
(with ST Viper 12A)
ST7538Q
Modem
Section
ST7538Q
ST7538Q
Modem
Modem
Section
Section
Dual Channel
TX Passive
Filter
Dual Channel
Dual Channel
TX Passive
TX Passive
Filter
Filter
Dual Channel
RX Passive Filter
Dual Channel
Dual Channel
RX Passive Filter
RX Passive Filter
Dual Channel
RX Active Filter
Dual Channel
Dual Channel
RX Active Filter
RX Active Filter
Power Supply
(with ST Viper 12A)
Power Supply
Power Supply
(with ST Viper 12A)
(with ST Viper 12A)



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