Datasheet

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V
IN
(V)
RMS Noise (nV)
1000
900
800
700
600
500
400
300
200
100
0
2.5
−
2.5
−
2.0
−
1.5
−
0.5
−
1.0 1.00 0.5 1.5 2.0
PGA = 1
Data Rate = 10SPS
V
IN
(mV)
RMS Noise (nV)
50
45
40
35
30
25
20
15
10
5
0
19
−
19
−
14.25
−
9.5
−
4.75 4.750 9.5 14.25
PGA = 128
Data Rate = 10SPS
V
IN
(V)
INL (ppm of FSR)
INL (
µ
V)
5
4
3
2
1
0
−
1
−
2
−
3
−
4
−
5
25
20
15
10
5
0
−
5
−
10
−
15
−
20
−
25
2.5
−
2.5
−
2.0
−
1.5
−
0.5
−
1.0 1.00 0.5 1.5 2.0
PGA = 1
V
IN
(mV)
INL (ppmof FSR)
INL (nV)
10
8
6
4
2
0
−
2
−
4
−
6
−
8
−
10
390.625
312.5
234.375
156.25
78.125
0
−
78.125
−
156.25
−
234.375
−
312.5
−
390.625
19
−
19
−
14.25
−
9.5
−
4.75 4.750 9.5 14.25
PGA = 128
Temperature (
_
C)
Analog Current (
µ
A)
2000
1600
1200
800
400
0
110
−
50
−
30
−
10 10 30 50 70 90
Normal Mode, PGA = 64, 128
Normal Mode, PGA = 1, 2
Temperature (
_
C)
Digital Current (
µ
A)
120
100
80
60
40
20
0
110
−
50
−
30
−
10 10 30 50 70 90
Normal Mode, PGA = 64, 128
Normal Mode, PGA = 1, 2
Sleep Mode, All PGAs
ADS1232
ADS1234
SBAS350F – JUNE 2005 – REVISED FEBRUARY 2008
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25 ° C, AVDD = DVDD = VREFP = 5V, and VREFN = AGND, unless otherwise noted.
NOISE vs INPUT SIGNAL NOISE vs INPUT SIGNAL
Figure 19. Figure 20.
INTEGRAL NONLINEARITY INTEGRAL NONLINEARITY
vs INPUT SIGNAL vs INPUT SIGNAL
Figure 21. Figure 22.
ANALOG CURRENT DIGITAL CURRENT
vs TEMPERATURE vs TEMPERATURE
Figure 23. Figure 24.
Copyright © 2005 – 2008, Texas Instruments Incorporated 11
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