TS83102G0B ATMEL Corporation, TS83102G0B Datasheet - Page 25

• 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

SFDR Performance
with/without External
Dither
Typical Dual Tone
Dynamic Performance
2101C–BDC–02/04
Figure 22. SFDR (in dBC) With and Without Dither (-23 dBm DC to 5 MHz Out of Band
Dither)
Fs = 1.4 Gsps and Fin = 710 MHz
An increase in SFDR up to >10 dB with an addition of -23 dBrms DC to 5 MHz out-of-band
dither is noted.
The dither profile has to be defined according to the ADC’s INL pattern as well as the trade-off
to be reached between the increase in SFDR and the loss in SNR.
Please refer to the Application Note on dither for more information on adding dither to an ADC.
Figure 23. Dual Tone Reconstructed Signal Spectrum at Fs = 1.2 Gsps, Fin1 = 995 MHz,
Fin2 = 1005 MHz (-7 dBFS), IMD3 = 64 dBFS
Note:
The output data is not decimated. The spectrum is displayed from DC to 600 MHz.
-100
-120
-20
-40
-60
-80
0
0
-75 dBFS
10 MHz
F1 - F2
50
IMD3
100
F2 = Fs - Fin2
= 195 MHz
-64 dBFS
-7 dBFS
185 MHz
2F2 - F1
150
200
F1 = Fs - Fin1
=205 MHz
-7 dBFS
250
-65 dBFS
215 MHz
2F1 - F2
Fs (MHz)
300
350
-73 dBFS
400 MHz
F1 + F2
400
450
TS83102G0B
-63 dBFS
500
595 MHz
2F2 + F1
550
Fs/2
600
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