ADS7251 Datasheet, PDF (10/38 Pages) Texas Instruments – ADS7x51 12-Bit, 2-MSPS and 14-Bit, 1.5-MSPS, Dual, Differential Input, Simultaneous- Sampling, Analog-to-Digital Converters with Internal Reference

ADS7251, ADS7851
SBAS587A – JANUARY 2014 – REVISED APRIL 2014
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6.10 Typical Characteristics: ADS7251
At T_A = +25°C, AVDD = 5 V, DVDD = 3.3 V, V_REF = 2.5 V (internal), and f_DATA = 1 MSPS, unless otherwise noted.
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
0
200
400
600
800
1000
Input Frequency
C00
f_IN = 500 kHz
75
74.5
74
73.5
73
72.5
72
71.5
71
-40 -25 -10
f_IN = 10 kHz
5 20 35 50 65 80
Free-Air Temperature (^oC)
95 110 125
C00
Figure 3. Typical FFT for 500-kHz Input
75
74.5
74
73.5
73
72.5
72
71.5
71
-40 -25 -10
f_IN = 10 kHz
5 20 35 50 65 80
Free-Air Temperature (^oC)
95 110 125
C00
Figure 4. SNR vs Device Temperature
-87
-88
-89
-90
-91
-92
-93
-94
-95
-40 -25 -10
f_IN = 10 kHz
5 20 35 50 65 80
Free-Air Temperature (^oC)
95 110 125
C00
Figure 5. SINAD vs Device Temperature
75
Figure 6. THD vs Device Temperature
75
74
74
73
73
72
72
71
0
100
200
300
400
Input Frequency (kHz)
f_IN = 10 kHz
500
C00
Figure 7. SNR vs Input Frequency
71
0
100
200
300
400
Input Frequency (kHz)
500
C00
Figure 8. SINAD vs Input Frequency
10
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