TS83102G0B ATMEL Corporation, TS83102G0B Datasheet - Page 30

• Manufacturer Part Number: TS83102G0B
• Description: 10-bit 2 GSPS ADCthis State-of-the-art 10-bit 2 GSPS Converter Offers an Unprecedented Bandwidth of 3.3 GHZ And Excellent Band Flatness, Allowing to Directly Digitize Very High if Signals (2nd And 3rd Nyquist Zones) With High Linearity : The SFDR Rem
• Manufacturer: ATMEL Corporation

Considerations on ENOB: Linearity and Noise Contribution
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TS83102G0B
Figure 33. Example of a 16-kpoint FFT Computation at Fs = 1.4 Gsps, Fin = 702 MHz,
-1dBFS, T
This is a 16384 points FFT. It is 16 times decimated since a DEMUX 1:8 is used to relax the
acquisition system data rate, and data is captured on the rising edge of the data ready signal.
The spectrum is computed over the first Nyquist zone from DC to Fs/2 divided by the decima-
tion factor, which equals Fs/32 = 43.75 MHz.
Legend:
1. Ideal 10-bit quantization noise spectral density, peak value = -84 dB
2. Average SNR noise floor: 47 dB + 10 log (N
3. Average SNR noise floor: 57 dB + 10 log (N
4. Ideal 10-bit averaged SNR noise floor 6.02 x (N = 10) + 1.76 + 10 log (N
Note:
With ADC input referred thermal noise:
•
•
•
•
•
dB
ENOB = 7.6 bits
SINAD = 47 dB
THD = -55.7 dB (over 25 harmonics)
SFDR = -62.6 dBc
SNR = 47.3 dB
The thermal noise floor is expressed in dBm/Hz (at T = 300 K, B = 1 Hz): 10 log
(kTB/1 mW) = -174 dBm/Hz or -139.75 dBm/2.67 kHz. THD is calculated over the 25 first
harmonics.
J
= 80°C; Bin Spacing = (Fs/2) / 16384 = 2.67 kHz
Fin = -8 x (fs/16) + 702 MHz = 2 MHz
SFDR = -63 dBc
FFTpoint
FFTpoint
/2) = 86 dB including thermal noise
/2) = 96 dB without thermal noise
FFTpoint
2101C–BDC–02/04
/2) = 101
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