Data acquisition & sampling worksheet with answers

Free printable Data acquisition & sampling worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

New worksheet Practise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________ Date: ____________

1.Easy

A 12-bit ADC that rounds to the nearest code has an input range of 0 to 3.3 V. With 1 LSB = V_FSR/2ᴺ, find the largest quantisation error e_q,max in mV.

N = 12V_FSR = 3.3 V

e_q,max = mV

2.Easy

A 14-bit ADC has an input range of 0 to 1 V. Taking 1 LSB = V_FSR/2ᴺ, find the size of one LSB in mV.

N = 14V_FSR = 1 V

1 LSB = mV

3.Medium

Find the ideal signal-to-quantisation-noise ratio SQNR of a 24-bit ADC for a full-scale sine wave.

N = 24

SQNR = dB

4.Medium

A sensor measures pressure over a span of 200 kPa, and its output fills the whole input range of an ADC. The reading must resolve 0.1 kPa. Find the smallest number of bits N the ADC needs.

span = 200 kParesolution = 0.1 kPa

N =

5.Hard

A microcontroller with a 12 MHz clock sets its UART baud rate as f_clk/(16·D), with D a whole number rounded to the nearest value. The target is 57600 baud. Find the percentage error of the real baud rate (positive when it is too fast).

f_clk = 12 MHztarget = 57600 Bd

e = %

6.Hard

A microcontroller with a 1 MHz clock sets its UART baud rate as f_clk/(16·D), with D a whole number rounded to the nearest value. The target is 4800 baud. Find the percentage error of the real baud rate (positive when it is too fast).

f_clk = 1 MHztarget = 4800 Bd

e = %

Answer key

1. e_q,max = 0.4028 mV
2. 1 LSB = 0.06104 mV
3. SQNR = 146.2 dB
4. N = 11
5. e = 0.1603 %
6. e = 0.1603 %

Full step-by-step solutions: practise this topic on examproblems.com.