Datasheet

Linearity Error(ppm)
V (V)
REF
10
9
8
7
6
5
4
3
2
1
0
0.5 1.0 5.01.5 2.5 3.02.0
4.54.03.5
Linearity Error(ppm)
V (V)
IN
8
6
4
2
0
2
4
6
8
-
-
-
-
-5 -4
5
-3 -1 0-2 321 4
T =+25 C°
A
T = 10 C- °
A
T = 40 C- °
A
T =+105 C°
A
T =+85 C°
A
T =+55 C°
A
V =4.096V
REF
INL(ppm)
Temperature( C)°
7
6
5
4
3
2
1
0
-40 -15 11010 60 8535
Level (dBFS)
Frequency(Hz)
0
20
40
60
80
100
120
140
160
180
200
-
-
-
-
-
-
-
-
-
-
1
100k
10 100 10k1k
f=1kHz, 0.5dBFS
DRATE[1:0]=11
32768Points
-
Temperature Sensor Voltage (mV)
Temperature ( C)°
220
210
200
190
180
170
160
150
140
130
120
-40 -20 12020 60 80400 100
ADS1158 Only Temperature Forced,
Test PCB in Free Air
ADS1158 and Test PCB Temperatures
Forced Together
NumberofOccurrences
TemperatureReading( C)°
8
7
6
5
4
3
2
1
0
15
35UnitsFromTwoProductionSets
22
24
23
25
21
16
17
18
20
19
26
27
28
39
37
35
33
31
29
38
36
34
32
30
ADS1158
www.ti.com SBAS429D –JUNE 2008– REVISED MARCH 2011
TYPICAL CHARACTERISTICS (continued)
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.
INTEGRAL NONLINEARITY vs V
REF
INTEGRAL NONLINEARITY vs INPUT LEVEL
Figure 9. Figure 10.
INL vs TEMPERATURE OUTPUT SPECTRUM
Figure 11. Figure 12.
TEMPERATURE SENSOR VOLTAGE vs TEMPERATURE TEMPERATURE SENSOR READING HISTOGRAM
Figure 13. Figure 14.
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