基于TDA5051A設(shè)計的家庭自動化調(diào)制解調(diào)技術(shù)

本文介紹了TDA5051A主要特性和優(yōu)勢，方框圖，多種應(yīng)用電路和測量電路。TDA5051A是NXP 公司的家庭自動化調(diào)制解調(diào)器，單電源5V工作，數(shù)據(jù)速率600波特或1200波特，特別適用于ASK發(fā)送。TDA5051A具有全數(shù)字載波發(fā)生和整形，輸出功率級具有過載保護，接收輸入有自動增益控制（AGC），8位ADC和窄帶數(shù)字濾波，容易和EN50065-1兼容網(wǎng)絡(luò)兼容，主要用在家用電器控制，能量/熱量控制，采用家庭電力網(wǎng)絡(luò)的ASK數(shù)據(jù)發(fā)送。

The TDA5051A is a modem IC, specifically dedicated to ASK transmission by means of the home power supply network, at 600 baud or 1200 baud data rate. It operates from a single 5 V supply.

TDA5051A 主要特性和優(yōu)勢：

Full digital carrier generation and shaping

Modulation/demodulation frequency set by clock adjustment, from microcontroller or

on-chip oscillator

High clock rate of 6-bit D/A (Digital to Analog) converter for rejection of aliasing

components

Fully integrated output power stage with overload protection

Automatic Gain Control (AGC) at receiver input

8-bit A/D (Analog to Digital) converter and narrow digital filtering

Digital demodulation delivering baseband data

Easy compliance with EN50065-1 with simple coupling network

Few external components for low cost applications

SO16 plastic package

TDA5051A應(yīng)用：

Home appliance control (air conditioning, shutters, lighting, alarms and so on)

Energy/heating control

Amplitude Shift Keying (ASK) data transmission using the home power network

圖1。TDA5051A方框圖

圖2。TDA5051A片上時鐘電路典型配置圖

圖3。動力線不絕緣TDA5051A應(yīng)用框圖

圖4。動力線絕緣TDA5051A應(yīng)用框圖

圖5。動力線不絕緣TDA5051A應(yīng)用框圖，提升了靈敏度（典型值68dBuV）

圖6。動力線絕緣TDA5051A應(yīng)用框圖，提升了靈敏度（典型值68dBuV）

圖7。測量THD和TX OUT信號帶寬的電路圖

圖8。測量誤碼率（BER）的電路圖