Uses of Mixed Domain Oscilloscopes in Analog-to-Digital Converters-EEWORLD

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Analog-to-digital converter, also known as A/D converter, or ADC for short, usually refers to an electronic component that converts analog signals into digital signals. A common analog-to-digital converter converts an input voltage signal into an output digital signal. Since the digital signal itself has no practical meaning, it only represents a relative size. Therefore, any analog-to-digital converter requires a reference analog quantity as a conversion standard. The more common reference standard is the maximum convertible signal size. The output digital quantity represents the size of the input signal relative to the reference signal.

The resolution of an analog-to-digital converter refers to the number of discrete digital signal values it can output for an analog signal within the allowed range. These signal values are usually stored in binary numbers, so the resolution is often expressed in bits, and the number of these discrete values is a power of 2. For example, an analog-to-digital converter with an 8-bit resolution can encode an analog signal into 256 different discrete values (because 2^8=256), from 0 to 255 (i.e., unsigned integers) or from -128 to 127 (i.e., signed integers), depending on the specific application.

for example:

Example 1: For a 2-bit voltage analog-to-digital converter, if the reference is set to 1V, the output signals have 4 codes: 00, 01, 10, and 11, which represent the corresponding inputs when the input voltage is 0V-0.25V, 0.26V-0.5V, 0.51V-0.75V, and 0.76V-1V. It is divided into 4 levels of coding. When a 0.8V signal is input, the converter outputs data 11.

Example 2: For a 4-bit voltage analog-to-digital converter, if the reference is set to 1V, the output signals are 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111, 16 codes, representing the input voltage of 0V-0.0625V, 0.0626V-0.125V, ........... 0.9376V-1V. It is divided into 16 levels of coding (more accurate). When a 0.8V signal is input, the converter outputs 1100.

The MDO3000 Series Mixed Domain Oscilloscopes are used in analog-to-digital converters:

1. Check the analog bus, digital bus and SPI bus on the ADC

2. Check radiated EMI

3. Bandpass filter test

4. Measuring Aperture Jitter

5. Find the number of ADC losses

6. Perform AC dynamic test

7. Analyze signal-to-noise ratio and distortion

8. Perform jitter testing

9. Measuring crosstalk

10. Measuring differential clock propagation delay

11. Measure the power supply rejection ratio

Reference address：Uses of Mixed Domain Oscilloscopes in Analog-to-Digital Converters

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