Datasheet

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2.55
2.50
2.45
V
REFOUT
Current Load (mA)
−
0.5 0 0.5 1.0 1.5 2.0 2.5
V
REFOUT
(V)
200
170
140
110
80
50
20
−
10
−
40
−
70
−
100
Offset (ppm of FSR)
Temperature (

C)
−
50
−
30 10
−
10 30 50 70 90
1.00020
1.00016
1.00012
1.00008
1.00004
1.00000
0.99996
0.99992
0.99988
0.99984
0.99980
0.99976
Normalized Gain
Temperature (

C)
−
50
−
30 10
−
10 30 50 70 90
1.000
1.000
0.999
0.999
0.998
V
DD
−
V
OUT
(V)
0 1 2 3 4 5
I
OUT
(Normalized)
+85

C
−
40

C
+25

C
3000
2000
1000
0
−
1000
−
2000
−
3000
−
4000
−
5000
−
6000
IDAC Match (ppm)
Temperature (

C)
−
50
−
30 10
−
10 30 50 70 90
1.01
1.005
1
0.995
0.99
0.985
I
OUT
(Normalized)
Temperature (

C)
−
50
−
30 10
−
10 30 50 70 90
ADS1218
SBAS187C – SEPTEMBER 2001 – REVISED SEPTEMBER 2005
TYPICAL CHARACTERISTICS (continued)
AV
DD
= +5V, DV
DD
= +5V, f
OSC
= 2.4576MHz, PGA = 1, R
DAC
= 150k Ω , V
REF
≡ (REF IN+) – (REF IN–) = +2.5V, and
f
DATA
= 10Hz, unless otherwise specified.
V
REFOUT
vs LOAD CURRENT OFFSET DAC – OFFSET vs TEMPERATURE
Figure 17. Figure 18.
OFFSET DAC – GAIN vs TEMPERATURE IDAC R
OUT
vs V
OUT
Figure 19. Figure 20.
IDAC NORMALIZED vs TEMPERATURE IDAC MATCHING vs TEMPERATURE
Figure 21. Figure 22.
14