ADC0801S040TS/C1'1

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Analog to Digital Converters (ADC) are an important component of data acquisition systems, serving to transform continuous analog signals into a signal that can be recognized by a digital computer. The ADC0801S040TS/C1 is a low cost, 8-bit, successive approximation analog to digital converter (ADC) in a 20-pin package with an internal voltage reference. This document explains the application fields and working principles of the ADC0801S040TS/C1.

General Application Fields

The ADC0801S040TS/C1 is best used for low power, moderate speed applications. A few of the possible applications include monitoring systems, data loggers, and motor controls. The ADC0801S040TS/C1 supports variable analog input ranges of up to ±1V, making it suitable for operations involving low voltage signals or measurements. Additionally, the internal voltage reference minimizes the amount of external circuitry required.

Working Principle of the ADC0801S040TS/C1

Due to its 8-bit resolution, the ADC0801S040TS/C1 can produce 256 possible 8-bit conversions or 65536 possible 10-bit conversions. The working principle involves a successive approximation conversion technique. The successive approximation process performs a binary search for the input code and provides for maximum accuracy and repeatability with 1/2 bit resolution.

The conversion is initiated by the user and is completed in one clock cycle from one to sixteen clock cycles. The clock cycle starts with the rising edge of the conversion pulse, at which point the digital codes are compared to the analog input. The successive approximation register is then updated according to the comparison. The process continues until the digital codes have been recognized by the successive approximation register, at which point the conversion is complete.

Conclusion

The ADC0801S040TS/C1 is a low cost, 8-bit, successive approximation analog to digital converter suitable for operations involving low voltage signals or measurements. Its 8-bit resolution and successive approximation conversion technique make it an attractive choice for low power, moderate speed applications.

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