Datasheet

Normalized Gain Error (ppm)
V
REF
(V)
20
15
10
5
0
−
5
−
10
−
15
−
20
0.5 1.0 5.01.5 2.0 2.5 3.0 3.5 4.0 4.5
Normalized Gain Error (ppm)
Time After Power−On (s)
10
8
6
4
2
0
−
2
−
4
−
6
−
8
−
10
0 10 6020 30 40 50
Free−Air
Linearity Error (ppm)
V
REF
(V)
10
8
6
4
2
0
0.5 1.0 5.01.5 2.0 2.5 3.0 3.5 4.0 4.5
Linearity Error (ppm)
V
IN
(V)
−
5
−
4
10
8
6
4
2
0
−
2
−
4
−
6
−
8
−
10
5
−
3
−
2
−
1 0 1 2 3 4
V
REF
= 5V
T
A
=
−
40
_
C,
−
10
_
C, +25
_
C, +55
_
C, +85
_
C, +105
_
C
INL (ppm)
Temperature (
_
C)
8
6
4
2
0
−
40
−
20 120100
0 20 806040
Level(dBFS)
Frequency(Hz)
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
1 10 100k100 1k 10k
f=1kHz, 0.5dBFS-
DRATE[1:0]=11
65536Points
ADS1258-EP
SBAS445D –MARCH 2009– REVISED MARCH 2011 www.ti.com
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.
GAIN ERROR vs V
REF
GAIN ERROR POWER-ON WARMUP
Figure 22. Figure 23.
INTEGRAL NONLINEARITY vs V
REF
INTEGRAL NONLINEARITY vs INPUT LEVEL
Figure 24. Figure 25.
INTEGRAL NONLINEARITY vs TEMPERATURE OUTPUT SPECTRUM
Figure 26. Figure 27.
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