ADS5292 Datasheet, PDF (18/67 Pages) Texas Instruments – Octal Channel 12-Bit, 80 MSPS and Low-Power ADC

ADS5292
SLAS788B – NOVEMBER 2011 – REVISED JULY 2012
www.ti.com
TYPICAL CHARACTERISTICS (continued)
Typical values are at 25°C, AVDD = 1.8 V, LVDD = 1.8 V, 50% clock duty cycle, –1 dBFS differential analog input, 12Bit/80
MSPS, ADC is configured in the internal reference mode, unless otherwise noted.
0
SNR = 70.5 dBFS
−10 _{SINAD = 70.3 dBFS}
−20 ^{SFDR = 88.5 dBc}
THD = 85.2 dBc
−30
0
SNR = 69.5 dBFS
−10 _{SINAD = 68.2 dBFS}
−20 ^{SFDR = 78.5 dBc}
THD = 73.2 dBc
−30
−40
−40
−50
−50
−60
−60
−70
−70
−80
−80
−90
−90
−100
−100
−110
−110
−120
−120
−130
−130
−140
5
10
15
20
Frequency (MHz)
−140
5
10
15
20
Frequency (MHz)
Figure 12. FFT for 15 MHz Input Signal, Sample Rate = 40
MSPS
Figure 13. FFT for 65 MHz Input Signal, Sample Rate = 40
MSPS
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
fIN1 = 8 MHz
fIN2 = 10 MHz
Each Tone at −7dBFS Amplitude
Two Tone IMD = −89.16 dBFS
10
20
30
40
Frequency (MHz)
Figure 14. FFT with Two Tone Signal
73
12 Bits
72.5
14 Bits
72
71.5
71
70.5
70
69.5
69
68.5
68
0
10 20 30 40 50 60 70 80
Input Signal frequency (MHz)
Figure 15. Signal-to-Noise Ratio Across Input Signal
Frequency
18
Submit Documentation Feedback
Product Folder Link(s) :ADS5292
Copyright © 2011–2012, Texas Instruments Incorporated