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Which type of ADC is used in microcontroller?
An analog-to-digital converter (ADC) is used to convert an analog signal such as voltage to a digital form so that it can be read and processed by a microcontroller. Most microcontrollers nowadays have built-in ADC converters. It is also possible to connect an external ADC converter to any type of microcontroller.
What is ADC and its type?
Comparison of major ADC Types
| ADC Type | Pros | Max Resolution |
|---|---|---|
| Successive Approximation (SAR) | Good speed/resolution ratio | 18 bits |
| Delta-sigma (ΔΣ) | High dynamic performance, inherent anti-aliasing protection | 32 bits |
| Dual Slope | Accurate, inexpensive | 20 bits |
| Pipelined | Very fast | 16 bits |
Can a microcontroller interface with an ADC Register?
In the present time, there are lots of microcontrollers in the market which has inbuilt ADC with one or more channels, E.g.: PIC18F4550, LPC1768, etc. And by using their ADC registers we can interface. Unfortunately, 8051 doesn’t have an internal module so we will go for an external ADC. which is ADC0808.
How are the channels in a PIC microcontroller connected?
ADC Channels: The ADC module is connected to several channels via a multiplexer. The multiplexer can connect the input of the ADC to any of the available channels. This allows you to connect many analog signals to the MCU (say 3 temperature sensors). In PIC18F4520 there are 13 analog input channels, they are named AN0, AN1 etc.
Which is better an internal or external ADC?
A typical external ADC will often have better specifications than an internal one, even when both have the same advertised bit depth. Integrating an ADC onto a microcontroller is easy. Integrating a good ADC is much harder. Guess which is more common.
Which is an example of an ADC converter?
ADC stands for analog to digital converter. It will convert a voltage to a number so that it can be processed by a digital systems like MCU. This enables us to easily interface all sort of analog devices with MCUs. Some really helpful example of analog devices are Light Sensors. Temperature Sensors. Accelerometers.