A/D-converter performance evolution

jinyexing

http://converterpassion.wordpress.com/




Contents
CONTENTS .............................................................................................................................. II
LIST OF FIGURES .................................................................................................................. IV
LIST OF TABLES .................................................................................................................... V
1. INTRODUCTION .................................................................................................................. 1
1.1 About this survey ............................................................................................................................. 2
2. CMOS NODE ADOPTION ................................................................................................... 4
2.1 Observation of technology adoption .............................................................................................. 4
2.2 Adoption rates, systems on chip, and the scaling gap ................................................................ 5
2.3 Future ADC scaling .......................................................................................................................... 5
3. LOW-VOLTAGE OPERATION VS. SCALING .................................................................... 6
3.1 Voltage scaling: Stragglers, mainstream and pioneers ............................................................... 6
3.2 ADC supply voltage vs. CMOS node .............................................................................................. 7
4. LOW-VOLTAGE OPERATION OVER TIME ..................................................................... 10
4.1 Observation of supply voltage trends .......................................................................................... 11
4.2 Future VDD scaling for ADCs ........................................................................................................ 12
5. THERMAL NOISE .............................................................................................................. 13
5.1 Separation of noise sources ......................................................................................................... 13
5.1.1 Quantization vs. circuit noise .................................................................................................................. 13
5.1.2 Noise sources excluded from this survey .............................................................................................. 14
5.1.3 Thermal Noise ........................................................................................................................................... 14
5.2 Observation of ADC thermal noise trends ................................................................................... 15
5.3 Additional remarks ......................................................................................................................... 17
6. JITTER ............................................................................................................................... 18
6.1 Observation of ADC jitter trends .................................................................................................. 18
6.2 Additional remarks ......................................................................................................................... 21 © ADMS Design AB http://www.admsdesign.com
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7. RELATIVE NOISE FLOOR ................................................................................................ 22
7.1 Observation of ADC noise floor trends ........................................................................................ 22
7.2 Conclusion: ADC noise performance trends .............................................................................. 23
7.3 Additional remarks ......................................................................................................................... 24
8. LINEARITY (SFDR) ........................................................................................................... 25
8.1 ADC linearity trends: SFDR-vs-frequency envelope .................................................................. 25
8.2 ADC linearity trends: SFDR by speed grade ............................................................................... 27
8.3 Commercial ADC parts .................................................................................................................. 28
9. SAMPLING RATE AND RESOLUTION ............................................................................ 29
9.1 Additional remarks ......................................................................................................................... 30
10. WALDEN FIGURE-OF-MERIT (FOM) ............................................................................. 31
11. THERMAL FIGURE-OF-MERIT (FOM) ........................................................................... 33
12. APPENDIX: A SURVEY OF ADC SURVEYS ................................................................. 35
12.1 Survey characteristics ................................................................................................................. 35
12.2 Known ADC surveys .................................................................................................................... 37
12.3 About the surveys ........................................................................................................................ 37
12.3.1 Walden ..................................................................................................................................................... 37
12.3.2 Merkel & Wilson ...................................................................................................................................... 38
12.3.3 Le, Rondeau, Reed & Bostian ................................................................................................................ 38
12.3.4 Murmann .................................................................................................................................................. 38
12.3.5 Fuiano, Cagnazzo & Carbone ................................................................................................................ 39
12.3.6 Jonsson ................................................................................................................................................... 39
12.4 Other survey-related literature .................................................................................................... 39
13. REFERENCES .................................................................................................................

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