Embedded Systems ADC Quiz with complete solutions
The HC11 has an __-bit, __-channel ADC - Answer8,8
/.__ signals can be input into the HC11 - Answer8
/.Signal samples are assigned a value between __ and __ - Answer$00, $FF
/.The ADC can be accessed via ____ _ on the HC11 - Answerport E
/.Sampling Rate is: - AnswerThe frequency at which the analog signal is sampled
/.Nyquist Theorem states that: - Answerthe sampling frequency must be greater than 2
times the frequency of the analog signal for the analog signal to be accurately
represented
/.Analog Input Range: - Answerrange of analog voltages the ADC can accept
/.Analog Signal Interface: - Answercircuitry that converts transducer output to voltage
and scales it to fit within the analog input range
/.VRL (Voltage Reference Low) is:
For an 8-bit converter, it is assigned __ - Answerthe lowest voltage to be converted
$00
/.VRH (Voltage Reference High) is:
For an 8-bit converter, it is assigned __ - Answerthe highest voltage to be converted
$FF
/.VRL and VRH must be selected such that __ < | VRL - VRH | < __ - Answer2.5V , 5V
/.On the HC11 VRL is pin __ while VRH is pin __. - Answer51, 52
/.Analog Voltage Range ( Analog Input Range ) is: - Answer| VRH - VRL |
/.The analog voltage range for the EVB board is - Answer5V
/.Resolution has two meanings with respect to ADCs. What are they? - AnswerNumber
of Bits (8-bit converter, therefore 8-bit resolution)
Step Size = (VRH - VRL)/(2^n -1)
/.Step Size of the HC11 - Answer20mV
/.Quantization Error - Answer+- 1/2 step size
The HC11 has an __-bit, __-channel ADC - Answer8,8
/.__ signals can be input into the HC11 - Answer8
/.Signal samples are assigned a value between __ and __ - Answer$00, $FF
/.The ADC can be accessed via ____ _ on the HC11 - Answerport E
/.Sampling Rate is: - AnswerThe frequency at which the analog signal is sampled
/.Nyquist Theorem states that: - Answerthe sampling frequency must be greater than 2
times the frequency of the analog signal for the analog signal to be accurately
represented
/.Analog Input Range: - Answerrange of analog voltages the ADC can accept
/.Analog Signal Interface: - Answercircuitry that converts transducer output to voltage
and scales it to fit within the analog input range
/.VRL (Voltage Reference Low) is:
For an 8-bit converter, it is assigned __ - Answerthe lowest voltage to be converted
$00
/.VRH (Voltage Reference High) is:
For an 8-bit converter, it is assigned __ - Answerthe highest voltage to be converted
$FF
/.VRL and VRH must be selected such that __ < | VRL - VRH | < __ - Answer2.5V , 5V
/.On the HC11 VRL is pin __ while VRH is pin __. - Answer51, 52
/.Analog Voltage Range ( Analog Input Range ) is: - Answer| VRH - VRL |
/.The analog voltage range for the EVB board is - Answer5V
/.Resolution has two meanings with respect to ADCs. What are they? - AnswerNumber
of Bits (8-bit converter, therefore 8-bit resolution)
Step Size = (VRH - VRL)/(2^n -1)
/.Step Size of the HC11 - Answer20mV
/.Quantization Error - Answer+- 1/2 step size
