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EVALST7540-2

EVALST7540-2 electronic component of STMicroelectronics

Datasheet
Networking Development Tools ST7540 FSK Powerline Transceiver EVAL BRD

Manufacturer: STMicroelectronics
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges



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EVALST7540-2
STMicroelectronics

1 : USD 187.11
N/A

Obsolete
     
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AN2451 Application note ST7540 FSK powerline transceiver design guide for AMR Introduction The ST7540 reference design has been developed as a useful tool to demonstrate how a small, high-performance powerline node can be built using the ST7540 FSK transceiver. With this reference design, it is possible to evaluate the ST7540 features, in particular, its transmitting and receiving performances through actual communication on the power line. The ST7540 reference design may be considered to be composed of three main sections: Power supply section, specifically tailored to match powerline coupling requirements and to operate within a wide range of the input mains voltage Modem and crystal oscillator section Line coupling interface section The coupling interface is designed to allow the ST7540 FSK transceiver to transmit and receive on the mains using 72 kHz carrier frequencies, within the European CENELEC standard A-band specified for automatic meter reading. Figure 1. ST7540 reference design board with outline dimensions 76 mm As it can be seen from the picture above, a special effort has been made to obtain a very compact reference design board, while keeping the focus on transmission and receiving performances. Note: The information provided in this application note refers to EVALST7540-2 reference design board. January 2010 Doc ID 12791 Rev 3 1/55 www.st.com 52 mm Contents AN2451 Contents 1 Electrical characteristics . 7 2 Safety precautions 9 3 ST7540 FSK powerline transceiver description 10 4 Evaluation tools description . 11 5 Board description 13 5.1 Coupling interface 18 5.1.1 Tx active filter . 19 5.1.2 Tx passive filter . 20 5.1.3 Rx passive filter . 22 5.1.4 Input impedance 24 5.2 Conducted disturbances 25 5.2.1 Conducted emissions 25 5.2.2 Noise immunity . 26 5.3 Thermal design 29 5.4 Oscillator section . 32 5.5 Surge and burst protection 32 5.6 50-pin connector for the EVALCOMMBOARD . 35 5.7 Power supply 36 6 Performance and ping tests 41 7 Application ideas . 42 7.1 Three-phase architecture . 42 7.2 Zero crossing detector . 42 7.3 Received Signal Strength Indicator (RSSI) . 44 7.4 Non-isolated coupling 45 7.5 DC powerline applications 46 7.6 110 and 132.5 kHz coupling circuit . 46 8 Troubleshooting . 49 2/55 Doc ID 12791 Rev 3

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9027.10.00 Instruments and apparatus for physical or chemical analysis (eg, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes Free

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