Pin2 is the input pin вЂ“ High to low pulse brings the data from the internal register to the output pins after conversion. A suitable RC circuit is connected between the clock IN and clock R pins to use the internal clock. An external clock can be given to CLK IN pin no.4.

The time taken to convert the analog to digital value depends on the clock source. It can take only one analog signal as input.

It is an 8-bit converter with a 5V power supply. The objective of an A/D converter is to determine the output signal word corresponding to an analog signal. These converters find more applications as an intermediate device to convert the signals from analog to digital form, display output on LCD through a microcontroller. There are many methods to convert analog signals to digital signals. The time taken for the entire conversion can be done within a microsecond. So this is the entire method to change an analog signal to digital using an ADC. So it is required to change the signal from digital to binary with the help of an encoder. We know that a digital device works by using binary signals. The final block in ADC is an encoder that converts the signal from digital form to binary. Now, the signal will be in digital form because it includes discrete amplitude as well as time. The value of continuous amplitude within hold block moves throughout quantize block to turn into discrete in amplitude. The main function of this is to convert the amplitude from continuous (analog) into discrete. In ADC, this is the third block which is mainly used for quantization. So the value of hold doesnвЂ™t change until the next sample. In ADC, HOLD is the second block and it doesnвЂ™t have any function because it simply holds the sample amplitude till the next sample is taken. Based on the system requirement, the sampling rate can be fixed. So it can be maintained at a precise rate. While converting the signal, the sampling frequency plays an essential role. The samples are used in continuous amplitude and hold real value however they are discrete with respect to time. In the sample block, the analog signal can be sampled at an exact interval of time. In ADC, the conversion of the signal from analog to digital can be explained through the above block diagram. Finally, the last block like encoder changes the discrete amplitude into a binary number. The hold sample can be quantized into discrete value through the third block like quantize. The amplitude value of the sample like an analog value can be maintained as well as held within the second block like Hold. The process of ADC can be done like the following.ДЇirst, the analog signal is applied to the first block namely a sample wherever it can be sampled at an exact sampling frequency. The block diagram of ADC is shown below which includes sample, hold, quantize, and encoder. Classification of ADCs based on factors like performance, bit rates, power, cost, etc. Dynamic characteristics of the high-performance ADCs are improved measurement repeatability, low power consumption, precise throughput, high linearity, excellent Signal-to-Noise Ratio (SNR), and so on.ДЄ variety of applications of the ADCs are measurement and control systems, industrial instrumentation, communication systems, and all other sensory-based systems.

With the invention of a wide variety of ADC integrated circuits (ICвЂ™s), data acquisition from various sensors becomes more accurate and faster. One of the major benefits of ADC converter is the high data acquisition rate even at multiplexed inputs. Bit resolution is nothing but how much accuracy can an analog to digital converter can convert the signal from analog to digital.The sample rate of an ADC is nothing but how fast an ADC can convert the signal from analog to digital.

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