TS83102G0B Datasheet, PDF (31/56 Pages) ATMEL Corporation – 10-bit 2 Gsps ADC

TS83102G0B
Without ADC input referred thermal noise:
• ENOB = 9.2 bits
• SINAD = 57 dB
• THD = -55.7 dB (over 25 harmonics)
• SFDR = -62.6 dBc
• SNR = 57.3 dB
Conclusion:
Though the ENOB is 7.6 bits (in this example at 1.4 Gsps Nyquist conditions), the ADC fea-
tures a 10-bit linearity regarding the 60 dB typical SFDR performance.
However, it has to be pointed out that the ENOB is actually limited by the ADC’s input referred
thermal noise, which dominates the rms quantization noise. For certain applications (using a
spread spectrum) the signal may be recovered below the thermal noise floor (by cross correla-
tion since it is white noise).
Therefore, the thermal noise can be extracted from the ENOB: the ENOB without a referred
input thermal noise is 9.2 instead of 7.6 in this example, only limited by the quantization noise
and clock induced jitter.
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2101D–BDC–06/04