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1 ----------- |
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2 SIS3316-250 |
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3 ----------- |
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4 |
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5 16 channel 250 MSPS 14bit |
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6 ------------------------- |
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7 |
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8 `Specifications/Documentation: <http://www.struck.de/sis3316.html>` |
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9 |
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10 Overview |
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11 |
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12 .. image:: sis3316blockweb.png |
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13 |
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14 Some characteristics (measured with our board) |
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15 ---------------------------------------------- |
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16 |
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17 Test-Setup |
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18 ,,,,,,,,,, |
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19 |
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20 .. uml:: |
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21 |
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22 @startuml |
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23 |
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24 sprite $Process [16x16/16] { |
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25 FFFFFFFFFFFFFFFF |
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26 FFFFFFFFFFFFFFFF |
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27 FFFFFFFFFFFFFFFF |
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28 FFFFFFFFFFFFFFFF |
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29 FFFFFFFFFF0FFFFF |
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30 FFFFFFFFFF00FFFF |
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31 FF00000000000FFF |
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32 FF000000000000FF |
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33 FF00000000000FFF |
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34 FFFFFFFFFF00FFFF |
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35 FFFFFFFFFF0FFFFF |
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36 FFFFFFFFFFFFFFFF |
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37 FFFFFFFFFFFFFFFF |
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38 FFFFFFFFFFFFFFFF |
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39 FFFFFFFFFFFFFFFF |
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40 } |
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41 rectangle "Testsetup" <<$Process>> { |
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42 rectangle "Pure sinewave\ngenerator with low\nnoise and low distortion\n\nRhode & Schwarz SML02" <<$Process>> as src |
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43 rectangle "Sharp-edged low-pass filter\nwith cut-off frequency at\n110% of test frequency.\ntest frequency =9,28 MHz\n TTE LC7 series\nLC7R-11M-50-69B" <<$Process>> as tgt1 |
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44 rectangle "SIS3316/14Bit/250MSPS" <<$Process>> as tgt2 |
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45 rectangle "Matlab Analyzing\nLinux System" <<$Process>> as tgt3 |
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46 src -> tgt1 |
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47 tgt1 -> tgt2 |
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48 tgt2 -> tgt3 |
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49 } |
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50 @enduml |
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51 |
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52 |
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53 .. table:: Test results |
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54 |
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55 ========================================= ================= ========= =============== ================ |
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56 Input Voltage/Full Scale/125MHz Bandwidth SNR/dB at 9.28MHz ENOB/bits Input Freq./MHz Sample Freq./MHz |
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57 ========================================= ================= ========= =============== ================ |
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58 5V 69.68 11.28 9.28 125 |
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59 2V 67.65 10.94 9.28 125 |
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60 ========================================= ================= ========= =============== ================ |
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61 |
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62 SNR |
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63 ... |
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64 **Signal-to-noise ratio**\ (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise. [#f1] |
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65 |
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66 ENOB |
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67 .... |
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68 **Effective number of bits**\ (ENOB) is a measure of the dynamic performance of an analog-to-digital converter (ADC) and its associated circuitry. The resolution of an ADC is specified by the number of bits used to represent the analog value, in principle giving 2N signal levels for an N-bit signal. However, all real ADC circuits introduce noise and distortion. ENOB specifies the resolution of an ideal ADC circuit that would have the same resolution as the circuit under consideration. |
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69 |
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70 ENOB is also used as a quality measure for other blocks such as sample-and-hold amplifiers. This way, analog blocks can be easily included in signal-chain calculations as the total ENOB of a chain of blocks is usually below the ENOB of the worst block. [#f2] |
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71 |
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72 |
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73 .. rubric:: Footnotes |
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74 |
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75 .. [#f1] `https://en.wikipedia.org/wiki/Signal-to-noise_ratio` |
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76 .. [#f2] `https://en.wikipedia.org/wiki/Effective_number_of_bits` |