📖 13. Interfacing Data converters: A/D and D/A Converters
📖 From An Introduction To Microprocessor 8085 • 205 questions available
About 13. Interfacing Data converters: A/D and D/A Converters
The microprocessor understands only numbers (digital signals—0s and 1s). But the real world is analog—things like temperature, sound, and light are continuous values, not just on/off. D/A Converters (DACs) convert a digital number from the microprocessor into a continuous analog voltage (like to play a sound or control a motor). A/D Converters (ADCs) do the opposite: they take an analog voltage (like from a temperature sensor) and convert it into a digital number that the microprocessor can read and process. This chapter is about how to connect these "translators" to the 8085.
How It Works: For a DAC, the 8085 sends a digital value (e.g., 0-255) to a port, and the DAC chip outputs a corresponding voltage (e.g., 0-5V). This allows the 8085 to generate waveforms like sine waves or control motors. For an ADC, the 8085 sends a "Start Conversion" pulse to the ADC chip. The ADC then takes a sample of the analog voltage and, after a certain delay (conversion time), sets a "Data Ready" pin. The 8085 then reads the converted 8-bit digital value from the ADC's output pins. You will learn how to use these chips with handshaking signals to get accurate conversions.
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🔄 Last updated: 2026-07-30