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SBAS424C –JUNE 2009–REVISED MARCH 2010
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, AVDD = +2.5V, AVSS = –2.5V, DVDD = 3.3V, VREF = 2.5V, VREFN = AVSS, fCLK = 7.3728MHz, and
fDATA = 60SPS, unless otherwise noted.
REFERENCE INPUT CURRENT vs TEMPERATURE
REFERENCE INPUT CURRENT vs REFERENCE VOLTAGE
0
250
200
150
100
50
-25
-50
VREFP Input Current
-75
-100
VREFN Input Current
(VREFP = AVDD)
-125
-150
-175
-200
-225
-250
0
VREFN Input Current
-50
-100
-150
VREFP Input Current
(VREFN = AVSS)
-200
-250
0.5
1.0 1.5 2.0
2.5
3.0
3.5
4.0
4.5
5.0
-55 -35 -15
5
25
45
65
85
105 125
VREF (V)
Temperature (°C)
Figure 26.
Figure 27.
DIFFERENTIAL INPUT IMPEDANCE vs TEMPERATURE
INTERNAL REFERENCE SETTLING TIME
130
0.010
0.008
0.006
0.004
0.002
0
CREFIN = 1mF X7R
128
Internal Oscillator
126
External Crystal
124
-0.002
-0.004
-0.006
-0.008
-0.010
122
120
0
1
2
3
4
5
6
-55 -35 -15
5
25
45
65
85
105 125
Time (s)
Temperature (°C)
Figure 28.
Figure 29.
INTERNAL OSCILLATOR vs TEMPERATURE
7.50
7.45
7.40
7.35
7.30
7.25
7.20
-55 -35 -15
5
25
45
65
85
105 125
Temperature (°C)
Figure 30.
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