ADS5294 Datasheet, PDF (17/67 Pages) Texas Instruments – Octal Channel 14-Bit, 80 MSPS High-SNR and Low-Power ADC

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ADS5294
SLAS776B – NOVEMBER 2011 – REVISED JULY 2012
TYPICAL CHARACTERISTICS
Typical values are at 25°C, AVDD = 1.8 V, LVDD = 1.8V, 50% clock duty cycle, –1 dBFS differential analog input, 14 Bit/80
MSPS, ADC is configured in the internal reference mode, unless otherwise noted.
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
SNR = 76.1 dBFS
SINAD = 75.7 dBFS
SFDR = 87 dBc
THD =84.7 dBc
10
20
30
40
Frequency (MHz)
Figure 8. FFT for 5 MHz Input Signal,
Sample Rate = 80 MSPS
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
SNR = 75.5 dBFS
SINAD = 74.4 dBFS
SFDR = 80.3 dBc
THD =79.7 dBc
10
20
30
40
Frequency (MHz)
Figure 9. FFT for 15 MHz Input Signal,
Sample Rate = 80 MSPS
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
SNR = 70.7 dBFS
SINAD =69.5 dBFS
SFDR = 74.9 dBc
THD =74.55 dBc
10
20
30
40
Frequency (MHz)
Figure 10. FFT for 65 MHz Input Signal,
Sample Rate = 80 MSPS
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
SNR = 76.5 dBFS
SINAD = 76.5 dBFS
SFDR = 90.23 dBc
THD = 87 dBc
5
10
15
20
Frequency (MHz)
Figure 11. FFT for 5 MHz Input Signal,
Sample Rate = 40 MSPS
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