What is ADC differential?

A differential ADC measures the voltage difference between two inputs. Sensors that implement such concepts typically provide their output value as the voltage difference between two signals, also known as a differential signal.

What is single-ended and differential in ADC?

In single-ended mode, the ADC will measure the voltage at a single pin with reference to ground. In differential mode, the ADC will measure the voltage difference between two input pins, AIN+ and AIN-. The voltage potential measured by the ADC is equivalent to (AIN+ – AIN-).

What is ADC in ATmega?

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. Let us see how to use the ADC of AVR ATmega16 / ATmega32. ADC channel 0 to channel 7 are present on PORTA.

What is pseudo differential ADC?

A pseudo-differential unipolar ADC digitizes the differential analog input voltage (IN+ – IN–) over a span of 0V to VFS. In this range, a single-ended unipolar input signal, driven on the IN+ pin, is measured with respect to the signal ground reference level, driven on the IN– pin.

What is differential and single-ended?

A differential voltage is “floating”, meaning that it has no reference to ground. The measurement is taken as the voltage difference between the two wires. A single-ended measurement is taken as the voltage difference between a wire and ground. …

Why do I need ADC driver?

ADC drivers—circuits often specifically designed to provide such signals—perform many important functions including amplitude scaling, single-ended-to-differential conversion, buffering, common-mode offset adjustment, and filtering.

What is a single-ended ADC?

Single-ended ADC: Single-ended ADCs each have one input (not to be confused with input channels) that connects to the signal that needs to be converted to digital. The signal is referenced to either GND or some other fixed voltage reference.

How do I enable ADC?

To get the ADC to work, we need to do the following tasks:

Configure I/O pins as analog input(s) and configure ADC reference.
Configure ADC registers to choose an analog pin.
Configure ADC registers to enable the ADC.
Configure ADC registers to set the acquisition time.

How many ADC channels are in atmega 128?

The ADC is included in the device that makes it an ideal choice for sensor interfacing where it receives the analog signal and converts it to a digital one. There are total 8 channels available on the ADC module.

What is a pseudo differential?

A Differential input that has a reference resistor connected between the low side input and the analog ground is called pseudo differential. Pseudo differential input is used when the sensor itself is isolated from ground such as the case of a Thermocouple (TC) hanging in free air.