All ADCs are to a certain extend nonlinearity. 8. Operating temperature - measurement, which in optimal state for ADC-s, lets them function correctly. 9. Power dissipation - refers to the amount power dissipated when the ADC is operating. Question 2 An 8 bit ADC has a reference voltage of 5V. What is the digital output code word for an input of 1.2V? What is the voltage range corresponding to 1 LSB? 1,2𝑉 0,0195𝑉 = 61 ; 61 = 001111012 Digital output code for an input of 1.2V is 001111012. Voltage range corresponding to 1 LSB is U= 0,0195V. Question 3 A 15 bit ADC has a reference voltage of 10V. What is the digital output code word for an input of 6.83V? 15 bit = 32768 10V/ 32768 = 0,0003 V 6,83V / 0,0003 = 22767 22767 = 01011000 111011112 Question 4 What is the value of the quantization error between an input voltage of 2.3V and quantized voltage with the output code word equal to
signal. Channels related to the inputs of the ADC can either be multiplexed or individually selected. Linearity relates to how a ADC follows a linear function. All ADCs are to a certain extend non-linearity. Temperature is measurement, which in optimal state for ADC-s, lets them function correctly. Power dissipation refers to the amount power dissipated when the ADC is operating. 2. The output code is 001111012 and the voltage of the LSB is 0,0195V 3. The output code is 101011101101100 4. The value of the quantization error between an input voltage of 2.3V and quantized voltage with the output code word equal to 01110101 using an 8 bit ADC with 5V reference is 0.01484375V 5. 13 Bit ADC 6. The circuit diagram: 7. The run-up phase takes 400 µs, the run-down phase takes 1 ms. 8
selected or selected through a multiplexor. 7. Linearity – Describes how an ADC conveter follows a linear function. 8. Operating temperature – A temperature at which the ADC functions optimally, usually given by the manufacturer. 9. Power dissipation – The proportion of power dissipated (through heat) when the ADC is working. Question 2: An 8 bit ADC has a reference voltage of 5V. What is the digital output code word for an input of 1.2V? 001111012 What is the voltage range corresponding to 1 LSB? 0,0195V Question 3. A 15 bit ADC has a reference voltage of 10V. What is the digital output code word for an input of 6.83V? 101011101101100 Question 4. What is the value of the quantization error between an input voltage of 2.3V and quantized voltage with the output code word equal to 011101012 using an 8 bit ADC with 5V reference? 0.01484375V Question 5.
6. Channels relate to the inputs of the ADC can either be multiplexed or individually selected. 7. Linearity relates to how well a ADC follows a linear function. All ADCs are to a certain extend non-linear. 8. All ADC are depended on temperature, operating temperature is defined as the temperature at which the ADC functions correctly. 9. Power dissipation refers to the amount power dissipated when the ADC is operational. Question 2 Output Code = 001111012 Voltage LSB = 0.0195 V Question 3 1010111011011002 Question 4 VE = 0.01484375 V Question 5 13 Bit ADC Question 6 Question 7 A) tU = 400 µs B) td = 1000 µs (1 ms) Question 8 A) -85 dB B) -82 dB C) -84 dB Question 9 A) Sparkle codes / metastability, high power consumption, large size, expensive. B) Speed limited to ~5Msps. May require anti-aliasing filter. C) Slow Conversion rate. High precision external components required to achieve accuracy.
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