0.5
1.0
f
(MHz)
CLK
125
124
123
122
121
120
119
Signal-to-Noise Ratio (dB)
1.5
2.0
4.5
3.0
2.5
3.5
4.0
V
= 20mV
Data Rate = f
/4096
IN
DC
CLK
0.5
1.0
f
(MHz)
CLK
-
110
115
120
125
130
-
-
-
-
T
otal Harmonic Distortion (dB)
1.5
2.0
4.5
3.0
2.5
3.5
4.0
PGA = 8
V
= 31.25Hz, 0.5dBFS
Data Rate = f
/4096
IN
CLK
-
0
1
V
(V)
REF
130
125
120
115
110
105
100
Signal-to-Noise Ratio (dB)
2
3
5.5
5
4
PGA = 1
PGA = 8
0
1
V
(V)
REF
-
110
115
120
125
130
-
-
-
-
T
otal Harmonic Distortion (dB)
2
3
6
5
4
PGA = 1
PGA = 8
-
55
-
35
Temperature ( C)
°
126
125
124
123
122
121
120
Signal-to-Noise Ratio (dB)
-
15
5
125
45
85
25
65
105
V
= 20mV
IN
DC
-
55
-
35
Temperature ( C)
°
-
110
115
120
125
130
-
-
-
-
T
otal Harmonic Distortion (dB)
-
15
5
125
45
85
25
65
105
PGA = 8
V
= 31.25Hz, 0.5dBFS
IN
-
SBAS418I – SEPTEMBER 2007 – REVISED MARCH 2015
Typical Characteristics (continued)
At +25°C, AVDD = +2.5V, AVSS = –2.5V, f
CLK
= 4.096MHz, VREFP = +2.5V, VREFN = –2.5V, DVDD = +3.3V, PGA = 1,
CAPN – CAPP = 10nF, and f
DATA
= 1000SPS, unless otherwise noted.
Figure 7. SNR vs Temperature
Figure 8. THD vs Temperature
Figure 9. SNR vs Reference Voltage
Figure 10. THD vs Reference Voltage
Figure 11. SNR vs Clock Frequency
Figure 12. THD vs Clock Frequency
8
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