ADC0808 PDF

For interfacing these sensors to microcontrollers we require to convert the analog output of these sensors to digital so that the controller can read it. Why we are using ADC for Microcontroller? So we have to use external ADC. There are many ADCs available. ADC is a Successive approximation type with 8 channels i. I mean, In ADC we can give only one analog input.

Author:Maugami Faekus
Country:Ukraine
Language:English (Spanish)
Genre:Automotive
Published (Last):14 December 2010
Pages:18
PDF File Size:6.1 Mb
ePub File Size:5.86 Mb
ISBN:544-1-90530-149-7
Downloads:23524
Price:Free* [*Free Regsitration Required]
Uploader:Negami



ADC Free running Circuit Normally analogue-to-digital converter ADC needs interfacing through a microprocessor to convert analogue data into digital format.

This requires hardware and necessary software, resulting in increased complexity and hence the total cost. The circuit of A-to-D converter shown here is configured around ADC , avoiding the use of a microprocessor. It works on the principle of successive approximation. It has a total of eight analogue input channels, out of which any one can be selected using address lines A, B and C.

However, the circuit shown here is built to operate in its continuous mode without using any microprocessor. The input control signal SC, being active-low, initiates start of conversion at falling edge of the pulse, whereas the output signal EOC becomes high after completion of digitization.

As the conversion starts, EOC signal goes high. Thus, it provides continuous 8-bit digital output corresponding to instantaneous value of analogue input. The ADC IC requires clock signal of typically kHz, which can be easily derived from an Astable multi-vibrator constructed using inverter gates.

Since ADC works in the continuous mode, it displays digital output as soon as analogue input is applied. The decimal equivalent digital output value D for a given analogue input voltage Vin can be calculated from the relationship. ADC Clock input.

GRAVITATION QUANTIQUE BOUCLES PDF

8051 – ADC0808 Interfacing

ADC Free running Circuit Normally analogue-to-digital converter ADC needs interfacing through a microprocessor to convert analogue data into digital format. This requires hardware and necessary software, resulting in increased complexity and hence the total cost. The circuit of A-to-D converter shown here is configured around ADC , avoiding the use of a microprocessor. It works on the principle of successive approximation. It has a total of eight analogue input channels, out of which any one can be selected using address lines A, B and C. However, the circuit shown here is built to operate in its continuous mode without using any microprocessor. The input control signal SC, being active-low, initiates start of conversion at falling edge of the pulse, whereas the output signal EOC becomes high after completion of digitization.

EMMA HOLLY FAIRYVILLE PDF

adc0808引脚图与引脚功能

But there may a situation where we have to deal with external inputs such as analog signals. All most all the input signals from physical sensors are of analog signals. In such cases, we can interface the microcontroller with an external device such as an ADC to convert the analog signal to a digital signal. Because our microcontrollers can only understand 0 and 1. In this article, we look into the details of ADC interfacing with In the present time, there are lots of microcontrollers in the market which has inbuilt ADC with one or more channels, E.

EDGAR RICE BURROUGHS UNA PRINCESA DE MARTE PDF

ADC Interfacing with 8051

This needs extra hardware and appropriate software, resulting in more complexity and hence the total amount of cost. The circuit of Analogue to Digital converter shown here is configured around ADC, getting rid of the utilization of a microprocessor. It operates on the principle of successive approximation. It features a total of eight analogue input channels, out of which any one can be chosen working with address lines A, B and C. Even so, the circuit shown right here is constructed to operate in its continuous mode without working with any microprocessor. The input control signal SC, getting active-low, initiates start of conversion at falling edge of the pulse, whereas the output signal EOC becomes high after completion of conversion digitisation. Since the conversion starts, EOC signal goes high.

DE JERICO A MEXICO HISTORIA DE LA URBANIZACION PDF

ADC0808 – Simple Analoque to Digital Converter

These devices are also designed to operate from common microprocessor control buses, with tri-state output latches driving the data bus. It eliminates the need for external zero and full-scale adjustments. Easy to interface to all microprocessors. It operates on single 5V power supply.

Related Articles