Datasheet

NumberofOccurrences
Offset(OutputCode)
6000
5000
4000
3000
2000
1000
0
-4 -3 3-2 -1 0
2
25Units,256Samples/Unit
1
NumberofOccurrences
Offset(OutputCode)
3500
3000
2500
2000
1500
1000
500
0
-2 2-1 0
1
25Units,
254Samples/Unit
NormalizedOffset( V)m
Temperature( C)°
100
50
0
50
100
150
200
250
-
-
-
-
-
-40 -15 11010 60 8535
CHOP=1
CHOP=0
NumberofOccurrences
AbsoluteGainError(ppm)
40
35
30
25
20
15
10
5
0
100
150UnitsFromTwoProductionSets
2000 1100 1400
1300
1200 1500
900
1000 1700
600 300
400
500 200 800
700
1600 1800
1900
Normalized GainError(ppm)
Temperature( C)°
60
40
20
0
20
40
60
80
100
120
140
-
-
-
-
-
-
-
-40 -15 11010 60 8535
NumberofOccurrences
GainDrift(ppm/ C)°
30
25
20
15
10
5
0
-3.8
150UnitsFromTwoProductionSets
0.3 1.5 0.9 2.1
-0.3 -3.3
-2.7
-2.1 -0.9
-1.5
2.7 3.3
3.8
ADS1158
SBAS429D –JUNE 2008– REVISED MARCH 2011 www.ti.com
TYPICAL CHARACTERISTICS
At T
A
= +25°C, AVDD = +2.5V, AVSS = –2.5V, DVDD = +3.3V, f
CLK
= 16MHz (external clock) or f
CLK
= 15.729MHz (internal clock), OPA227
buffer between MUX outputs and ADC inputs, VREFP = +2.048V, and VREFN = –2.048V, unless otherwise noted.
OFFSET WITH 0.5V REFERENCE, CHOPPING ON OFFSET WITH 4.096V REFERENCE, CHOPPING ON
Figure 3. Figure 4.
OFFSET vs TEMPERATURE GAIN ERROR HISTOGRAM
Figure 5. Figure 6.
GAIN DRIFT HISTOGRAM GAIN ERROR vs TEMPERATURE
Figure 7. Figure 8.
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