interface & instrumentation. adc sensor interfacing gas sensor temperature sensor humidity...
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Interface & Instrumentation
ADC Sensor Interfacing
Gas Sensor
Temperature Sensor Humidity Sensor
Sonar Sensor
ADC Sensor Interfacing (Cont’d)
Characteristic:
1) Precision integrated-circuit2) Output voltage is linearly proportional to the Celcius3) Requires no external calibration (Internally calibration)4) Output: 10mV for each degree
ADC Sensor Interfacing (Cont’d)
10mV = 1 degree (Minimum)20mV = 2 degree30mV = 3 degree....1000mV = 100 degree (Maximum)
Vref = ???
5V
1.024
Step Size = 4.8mV
Step Size = 1mV
Vin (max) = 5V
Vin (max) = 1.024V
Which one suitable?
How to set Vref??
ADC Sensor Interfacing (Cont’d)
To overcome any fluctuations in power supply.
* Please see Program 13-4 page 524
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