Datasheet

8
7
6
5
4
3
2
1
0
Power-SupplyRejection( V/V)m
Gain
1 2 4 8 16 12832 64
5/10/20SPS
2000SPS
320/640/1000SPS
40/80/160SPS
0.004
0.003
0.002
0.001
0
-0.001
-0.002
-0.003
-0.004
Temperature( C)°
IEXC1 IEXC2(m- A)
-40 -20 0 20 40 60 80 100 120
1.5mASetting,10Units
Counts
2.0475 2.0476 2.0477 2.0478 2.0479 2.0480 2.0481 2.0482 2.0483 2.0484 2.0485
700
600
500
400
300
200
100
0
2280Units
InitialAccuracy(V)
Counts
-1.25 -1.00 -0.75 -0.50 -0.25
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
200
180
160
140
120
100
80
60
40
20
0
2280Units
InitialAccuracy(%)
−120
−100
−80
−60
−40
−20
0
0 200 400 600 800 1000
Time (hours)
Reference Drift (ppm)
32 Units
G000
Counts
-0.6
-0.5
-0.4
-0.3
-0.1
0
0.1 0.2 0.3 0.4 0.5 0.6
350
300
250
200
150
100
50
0
2280Units
InitialAccuracy(%)
-0.2
ADS1246
ADS1247
ADS1248
www.ti.com SBAS426G –AUGUST 2008–REVISED OCTOBER 2011
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, AVDD = 5V, V
REF
= 2.5V, and AVSS = 0V, unless otherwise noted.
IDAC DRIFT POWER-SUPPLY REJECTION vs GAIN
Figure 41. Figure 42.
INTERNAL V
REF
INITIAL ACCURACY HISTOGRAM IDAC INITIAL ACCURACY HISTOGRAM
Figure 43. Figure 44.
IDAC MISMATCH HISTOGRAM INTERNAL REFERENCE LONG TERM DRIFT
Figure 45. Figure 46.
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