Texas Instruments ADS867 Series Manual page 16

ADS8674, ADS8678
SBAS627 – JULY 2015
Typical Characteristics (continued)
At T = 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V
A
0.5
0.3
0.1
-0.1
-0.3
-0.5
±40 ±7
Free-Air Temperature (
Range = ±0.15625 × V
Figure 32. INL vs Temperature (±0.15625 × V
0.5
0.3
0.1
-0.1
-0.3
-0.5
±40 ±7
Free-Air Temperature (
Range = 0.3125 × V
Figure 34. INL vs Temperature (0.3125 × V
80
60
40
20
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3
Offset Drift (ppm
Range = ±2.5 × V
Figure 36. Typical Histogram for Offset Drift
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Maximum
Minimum
26 59 92 125
o
C)
C033
REF
)
REF
Maximum
Minimum
26 59 92 125
C035
o
C)
REF
)
REF
/o C)
C037
REF
Product Folder Links:
= 4.096 V, and f = 500 kSPS, unless otherwise noted.
REF SAMPLE
0.5
0.3
0.1
-0.1
-0.3
-0.5
±40 ±7
Free-Air Temperature (
Range = 0.625 × V
Figure 33. INL vs Temperature (0.625 × V
1
---- ± 2.5*V
0.75
---- “ 0.625*V
-------“0.156 V
0.5
---- + 1.25*V
---- + 0.3125*V
0.25
0
-0.25
-0.5
-0.75
-1
±40 ±7
Free-Air Temperature (
Figure 35. Offset Error vs
Temperature Across Input Ranges
1
0.75
0.5
0.25
0
-0.25
-0.5
-0.75
-1
±40 ±7
Free-Air Temperature (
Range = ±2.5 × V
Figure 37. Offset Error vs Temperature Across Channels
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ADS8674 ADS8678
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Maximum
Minimum
26 59 92 125
o
C)
REF
)
REF
---- “ 1.25*V
REF, REF
------“0.3125*V
REF, REF
---- + 2.5*V
REF, REF
---- + 0.625*V
REF, REF
REF
26 59 92 125
o
C)
......CH0, .......CH1, ......CH2,
.......CH3, ......CH4, .......CH5,
........CH6, .......CH7
26 59 92 125
o
C)
REF
C034
C036
C038