Texas Instruments ADS869 Series Manual page 16

ADS8694, ADS8698
SBAS686 – JULY 2015
Typical Characteristics (continued)
At T = 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V
A
0
±40
±80
±120
±160
±200
0 50000 100000
Input Frequency (Hz)
Number of points = 64k, f
SINAD = 90.45dB, THD = –106dB, SFDR = 109 dB
Figure 32. Typical FFT Plot (±0.625 × V
0
±40
±80
±120
±160
±200
0 50000 100000
Input Frequency (Hz)
Number of points = 64k, f
SINAD = 90.3dB, THD = –106 dB, SFDR = 108 dB
Figure 34. Typical FFT Plot (1.25 × V
98
96
94
92
90
88
±40 ±7
Free-Air Temperature (
f
IN
Figure 36. SNR vs Temperature
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150000 200000 250000
C033
= 1 kHz, SNR = 90.6dB,
IN
)
REF
150000 200000 250000
C035
= 1 kHz, SNR = 90.55 dB,
IN
)
REF
----- ± 2.5*V
REF
----- ] 1.25*V
REF
----- ] 0.625*V
REF
----- + 2.5*V
REF
-----+1.25*V
REF
26 59 92 125
o C)
C037
= 1 kHz
Product Folder Links:
= 4.096 V, and f = 500 kSPS, unless otherwise noted.
REF SAMPLE
0
±40
±80
±120
±160
±200
0 50000
Number of points = 64k, f
SINAD = 91.73 dB, THD = –108 dB, SFDR = 107 dB
Figure 33. Typical FFT Plot (2.5 × V
94.0
93.0
92.0
91.0
----- ± 2.5*V
90.0
REF
----- ] 1.25*V
REF
----- ] 0.625*V
89.0
----- + 2.5*V
REF
-----+1.25*V
REF
88.0
100
Figure 35. SNR vs Input Frequency
94
93
92
91
90
89
----- ± 2.5*V
88
REF
----- ] 1.25*V
REF
87 ----- ] 0.625*V
REF
----- + 2.5*V
REF
86
-----+1.25*V
REF
85
100
Figure 37. SINAD vs Input Frequency
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ADS8694 ADS8698
www.ti.com
100000 150000 200000
Input Frequency (Hz)
= 1 kHz, SNR = 91.83 dB,
IN
)
REF
REF
1000
Input Frequency (Hz)
1000
Input Frequency (Hz)
250000
C034
10000
C036
10000
C038