Temperature Measurement Using AD7416 Sensor

The project illustrates the use of digital temperature sensor AD7416 from Analog Devices in measuring temperatures or triggering some events due to temperature changes.

The temperature values being measured are usually in analog format although it would be convenient to have these values in a digital format. The digital values can then be transferred to microcontroller to process data or just to display on LCD screen. The simple routine in this project involves the ATmega8 microcontroller that reads sensor data and decodes temperature values before displaying it on 2×16 LCD display.

The AD7416 is a 10-bit, 4-channel, and single-channel ADC with an on-chip temperature sensor that can operate from a single 2.7V to 5.5V power supply. It contains a 15us successive approximation converter, a clock oscillator, a reference voltage, a track-and-hold, and a temperature sensor. it is a temperature-monitoring only device in an 8-lead package.

The internal clock oscillator which runs the automatic conversion sequence is restarted at the end of the read or write operation. The track-and-hold goes into hold mode approximately 3us after the read or write operation is complete and then initiates a conversion with a result available 15/30us later.

Read more