ADS7056
ZHCSG66 –MARCH 2017
www.ti.com.cn
6.8 Typical Characteristics
at TA = 25°C, AVDD = 3.3 V, DVDD = 1.8 V, fIN = 2 kHz, and fSample = 2.5 MSPS (unless otherwise noted)
0
-30
0
-30
-60
-60
-90
-90
-120
-150
-180
-120
-150
-180
0
250
500
750
1000
1250
0
250
500
750
1000
1250
Frequency (kHz)
Frequency (kHz)
D001
D002
SNR = 75.2 dB, THD = –90.25 dB, ENOB = 12.18 bits
SNR = 74.3 dB, THD = –87.9 dB, fIN = 250 kHz
Figure 3. Typical FFT
Figure 4. Typical FFT
0
0
-30
-30
-60
-90
-60
-90
-120
-120
-150
-180
-150
-180
0
250
500
750
1000
1250
0
250
500
750
1000
1250
Frequency (kHz)
Frequency (kHz)
D003
D004
SNR = 74.2 dB, THD = –90.25 dB, fIN = 500 kHz
SNR = 73.9 dB, THD = –87.1 dB, fIN = 1000 kHz
Figure 5. Typical FFT
Figure 6. Typical FFT
76
75
74
73
72
76
75
74
73
72
SNR
SINAD
SNR
SINAD
0
250
500
750
1000
-40
-7
26
59
92
125
Input Frequency (kHz)
Free-Air Temperature (èC)
D006
D005
Figure 8. SNR and SINAD vs Input Frequency
Figure 7. SNR and SINAD vs Temperature
8
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