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Description: 两线制电流 温湿度变送器原理图，MSP1221的PWM和XTR115
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Size: 18754 |
Author: 于辉 |
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Description: 两线制电流 温湿度变送器原理图，MSP1221的PWM和XTR115-Two-wire current temperature and humidity transmitter schematic, MSP1221 the PWM and XTR115
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Size: 18432 |
Author: 于辉 |
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Description: PWM经过RC滤波产生电压,经过XTR115产生4-20mA电流输出,要点是XTR115的电压输入问题,自身为两线制,+5V输出提供不了较大电流,需要用DCDC,RC滤波采用钽电容和4.7k-4.9k的低温漂电阻能得到较高线形度,PWM输出为AVR单片机16位,模式15,不分频-PWM voltage generated through RC filter, after XTR115 have 4-20mA current output, the key points of the voltage input XTR115 problems, their own two-wire system,+ 5V output can provide a larger current, need to DCDC, RC filter using tantalum capacitors and 4.7k-4.9k resistor at low temperature drift can be a higher degree of linear, PWM output for the AVR Singlechip 16, mode 15, regardless of the frequency
Platform: |
Size: 4096 |
Author: niucunfei |
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