1. Interface & Instrumentation

2. ADC Sensor Interfacing Gas Sensor Temperature Sensor Humidity Sensor Sonar Sensor

3. ADC Sensor Interfacing (Cont’d) Characteristic: 1)Precision integrated-circuit 2)Output voltage is linearly proportional to the Celcius 3)Requires no external calibration (Internally calibration) 4)Output: 10mV for each degree

4. ADC Sensor Interfacing (Cont’d) 10mV = 1 degree (Minimum) 20mV = 2 degree 30mV = 3 degree. 1000mV = 100 degree (Maximum) Vr ef = ??? 5V 1.024 Step Size = 4.8mV Step Size = 1mV Vin (max) = 5V Vin (max) = 1.024V Which one suitable? How to set V ref ??

5. ADC Sensor Interfacing (Cont’d) To overcome any fluctuations in power supply. * Please see Program 13-4 page 524