Texas Instruments ADS868 Series, Руководство пользователя

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0
20
40
60
80
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
Num
b
e
r
o
f
Device
s
Offset Drift (ppm/ºC)
C024
-1
-0.75
-0.5
-0.25
0
0.25
0.5
0.75
1
±
40
±
7
26 59 92 125
Of
fse
t
E
rr
o
r
(m
V
)
Free-Air Temperature (
o
C)
C025
------ CH0, ----- CH1
,
----- CH2
----- CH3, --- CH4, ------ CH5
------ CH6, ----- CH7
-2
-1
0
1
2
±
40
±
7 26 59 92 125
In
te
g
ra
l
Non
lin
e
a
rity
(
L
S
B
)
Free-Air Temperature (
o
C)
C022
Maximum
Minimum
-1
-0.75
-0.5
-0.25
0
0.25
0.5
0.75
1
±
40
±
7 26 59 92 125
Of
fse
t
E
rr
o
r
(m
V
)
Free-Air Temperature (
o
C)
C023
-----
± 2.5*V
REF
-----
± 1.25*V
REF
----- ± 0.625*V
REF
------ +2.5*V
REF
------+1.25*V
REF
-2
-1
0
1
2
±
40
±
7 26 59 92 125
In
te
g
ra
l
Non
lin
e
a
rity
(
L
S
B
)
Free-Air Temperature (
o
C)
C020
Maximum
Minimum
-2
-1
0
1
2
±
40
±
7
26 59 92 125
In
te
g
ra
l
Non
lin
e
a
rity
(
L
S
B
)
Free-Air Temperature (
o
C)
C021
Maximum
Minimum
ADS8684, ADS8688
www.ti.com SBAS582C – JULY 2014 – REVISED APRIL 2015
Typical Characteristics (continued)
At T
A
= 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V
REF
= 4.096 V, and f
SAMPLE
= 500 kSPS, unless otherwise noted.
Range = 2.5 × V
REF
Range = ±0.625 × V
REF
Figure 21. INL vs Temperature (2.5 × V
REF
)
Figure 20. INL vs Temperature (±0.625 × V
REF
)
Range = 1.25 × V
REF
Figure 22. INL vs Temperature (1.25 × V
REF
) Figure 23. Offset Error vs
Temperature Across Input Ranges
Range = ±2.5 × V
REF
Range = ±2.5 × V
REF
Figure 24. Typical Histogram for Offset Drift Figure 25. Offset Error vs Temperature Across Channels
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