What is ADC in AVR?

What is ADC in AVR?

ADC (Analog to Digital converter) is the most widely used device in embedded systems which is designed especially for data acquisition. In the AVR ATmega series normally 10-bit ADC is inbuilt in the controller. ATmega16/32 supports eight ADC channels, which means we can connect eight analog inputs at a time.

How does ADC work in AVR?

The ADC of the AVR converts analog signal into digital signal at some regular interval. This interval is determined by the clock frequency. In general, the ADC operates within a frequency range of 50kHz to 200kHz. But the CPU clock frequency is much higher (in the order of MHz).

What does an ADC convert?

ADCs follow a sequence when converting analog signals to digital. They first sample the signal, then quantify it to determine the resolution of the signal, and finally set binary values and send it to the system to read the digital signal. Two important aspects of the ADC are its sampling rate and resolution.

Can ADC convert current?

An ADC may also provide an isolated measurement such as an electronic device that converts an input analog voltage or current to a digital number representing the magnitude of the voltage or current.

What are the features of ATmega32 ADC?

The ATmega32 provides the following features: 32Kbytes of In-System Programmable Flash Program memory with Read-While-Write capabilities, 1024bytes EEPROM, 2Kbyte SRAM, 32 general purpose I/O lines, 32 general purpose working registers, a JTAG interface for Boundary- scan, On-chip Debugging support and programming.

Which registers are in the AVR dedicated to SPI?

AVR ATmega16 uses three registers to configure SPI communication that are SPI Control Register, SPI Status Register and SPI Data Register.

Does Atmel contain an analog to digital converter?

The Atmel ATmega328P microcontroller used on the Arduino Uno has an analog-to-digital conversion (ADC) module capable of converting an analog voltage into a 10-bit number from 0 to 1023 or an 8-bit number from 0 to 255. The ADC can convert signals at a rate of about 15 kSPS (samples per second.)