Analog-to-Digital Conversion › lesson 15 of 100 · Beginner

Explain Input Voltage Range

This lesson is part of the Analog-to-Digital Conversion course, and after completing it, you will be able to specify the input voltage range for an Analog-to-Digital Converter (ADC). The input voltage range is a crucial parameter in ADCs, and understanding it is essential for designing and working with these devices.

The input voltage range of an ADC is the range of voltage values that the ADC can accurately convert into digital signals.

For example, in a medical device that measures blood pressure, the input voltage range of the ADC might be set to 0-5V to match the output range of the pressure sensor. This range is critical because input voltages outside of this range can result in inaccurate or clipped digital outputs. The input voltage range is typically specified by the ADC manufacturer and is a key parameter in selecting the right ADC for a particular application.

The input voltage range is usually specified as a minimum and maximum voltage, such as 0-5V or -10V to +10V. Unipolar ADCs have a single voltage range, while bipolar ADCs have a range that includes both positive and negative voltages.

In addition to the input voltage range, other factors such as noise tolerance and input impedance must also be considered when selecting an ADC.

Exemple

• A unipolar ADC with an input voltage range of 0-10VThis ADC can only handle positive input voltages
• A bipolar ADC with an input voltage range of -5V to +5VThis ADC can handle both positive and negative input voltages
• An ADC with an input voltage range of 0-5V and a noise tolerance of 10mVThis ADC can handle input voltages up to 5V and can tolerate noise up to 10mV

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