TDA5051A电力猫开发套件

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TDA5051A演示板套件是网络开发工具，主要运用于电力线调制解调器。Document information Info Keywords Abstract Content Home automation modem, ASK power-line modem, EN50065-1 and EN50065-2 compliant, home lighting and appliance control The NXP is a complete Amplitude Shift Keying (ASK) modem for transmitting and receiving digital signals on standard power line or any two-wire or DC network. is a cost-effective solution that transmits at a rate of 600 baud (typical) and 1200 baud (maximum), operates from a single 5 V supply, and enables easy connection to standard microcontrollers, including NXP's LPC11xx series of low power ARM-based microcontrollers. The IC complies with EN50065-1, EN50065-2 and SC105A, and requires only a few external components for full operation. Its fully-digital transmission and reception circuitry provides efficient bidirectional communication of low baud rate data signals between a control unit and lighting fixture, and one or more household appliances connected to the mains. This application note discusses the requirements, filtering circuits and interface networks necessary to be fully compliant and to obtain robust, reliable operation in a power line communication network.AN10903 All information provided in this document is subject to legal disclaimers.The is a complete ASK modem dedicated to data transmission on power line network, requiring very few external components. It could be also used on any two-wire network for exchanging informations by means of ASK carrier current technique (DC or AC network). The use of a digital structure for both transmission and reception part provides an efficient solution for modulating and demodulating low baud rate data signals. A standard quartz crystal is required to set the operation frequency; in transmission mode, it defines the carrier frequency and in reception mode it defines the detection frequency.· CMOS process IC: low power consumption, reliability and high temperature stability,· Single +5 V power supply. The same power supply can be used to feed the· On-chip clock circuit. Using an external quartz crystal, the oscillator sets theoperation frequency and the clock output pin gives the possibility to supply the clock to a microcontroller. It is also possible to apply an external clock signal to the chip by using one of the oscillator pins as an input.· Full digital modulation with signal shaping. Using ROM and a 6-bit D/A converterprovides high stability of the carrier frequency, limitation of the signal bandwidth and easy choice of the frequency within a large range.· On-chip power amplifier with overload protection. Low distortion, low outputimpedance amplifier for limiting the number of external components and the size of the complete system. An internal feedback controls the output voltage to comply with the EN50065-1 standard (122 dBV maximum (RMS)).· Input amplifier with Automatic Gain Control (AGC). Provides a very highsensitivity of 66 dBV (RMS), allowing the detection of small signals in heavily loaded power line conditions.· Digital narrowband filter with 8-bit A/D converter. Equivalent an 8th-orderanalog filter, for an accurate and sharp filtering of the input signal.· Digital demodulation. A digital demodulator with variable threshold calculates theoptimum level in order to restore the baseband signal with the highest accuracy.· 600 baud typical rate, 1200 baud maximum· TTL/CMOS compatible data pins for direct connection to the controller.· Digital part fully scan testable for a complete digital production check, before and· Low cost external coupling network using a simple LC filter without any tunableAll information provided in this document is subject to legal disclaimers.