TYPICAL CHARACTERISTICS
(Cont.)
T
A
= +25°C, V
DD
= +2.7V, V
REF
=
External +2.5V, f
SAMPLE
= 50kHz, unless otherwise noted.
CHANGE IN GAIN vs TEMPERATURE
1.5
1.0
Delta from 25°C (LSB)
2.51875
2.51250
INTERNAL REFERENCE vs TEMPERATURE
0.5
0.0
–0.5
–1.0
–1.5
–50
–25
0
25
Temperature (°C)
50
75
100
Internal Reference (V)
2.50625
2.50000
2.49375
2.48750
2.48125
–50
–25
0
25
Temperature (°C)
50
75
100
POWER-DOWN SUPPLY CURRENT
vs TEMPERATURE
750
600
400
350
Supply Current (µA)
300
250
200
150
100
–50
–25
0
25
50
75
100
125
–50
SUPPLY CURRENT vs TEMPERATURE
Supply Current (nA)
450
300
150
0
–150
Temperature (°C)
–25
0
25
Temperature (°C)
50
75
100
SUPPLY CURRENT vs I
2
C BUS RATE
300
250
Supply Current (µA)
100
INTERNAL V
REF
vs TURN-ON TIME
80
Internal V
REF
(%)
200
150
100
50
0
10
100
I
2
C
1k
Bus Rate (KHz)
10k
No Cap
(42µs)
12-Bit Settling
60
1µF Cap
(1240µs)
12-Bit Settling
40
20
0
0
200
400
600
800
1000
1200
1400
Turn-On Time (µs)
8
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SBAS181C
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