Datasheet

200
180
160
140
120
100
80
60
40
20
0
Reading( V)m
Occurrences
5.0
DataRate=10SPS
ShortedInput
512Samples
4.0 3.0 2.0 1.0
0
-1.0
-2.0
-3.0
-4.0
-5.0 -4.5
-3.5
-2.5
-1.5
-0.5
0.5 4.5 3.5 2.5 1.5
160
140
120
100
80
60
40
20
0
Reading( V)m
Occurrences
5.0
DataRate=60SPS
ShortedInput
512Samples
4.0 3.0 2.0 1.0
0
-1.0
-2.0
-3.0
-4.0
-5.0 -4.5
-3.5
-2.5
-1.5
-0.5
0.5 4.5 3.5 2.5 1.5
1600
1400
1200
1000
800
600
400
200
0
Reading( V)m
Occurrences
50
DataRate=14.4kSPS
ShortedInput
4096Samples
40 30 20 10
0
-10
-20
-30
-40
-50 -45
-35
-25
-15
-5
5
45 35 25 15
2800
2400
2000
1600
1200
800
400
0
Reading( V)m
Occurrences
-25.0
DataRate=400SPS
ShortedInput
4096Samples
-20.0
-15.0
-10.0
-5.0
0
5.0
10.0 15.0 20.0 25.0
22.5 17.5 12.5
7.5 2.5
-2.5
-22.5
-17.5
-12.5
-7.5
25
24
23
22
21
20
19
Temperature( C)°
ENOB(rms)
125
DataRate=10SPS
-55 -35 -15 5 25 45 65 85 105
DataRate=60SPS
DataRate=14.4kSPS
16
14
12
10
8
6
4
2
0
ENOB(rms)
Occurrences
23.5
DataRate=60SPS
30Units
23.4
23.2
23.0
22.8
22.6
22.4
22.2
22.0
22.1
22.3
22.5
22.7
22.9
23.1
23.3
ADS1259
www.ti.com SBAS424D –JUNE 2009– REVISED AUGUST 2011
TYPICAL CHARACTERISTICS
At T
A
= +25°C, AVDD = +2.5V, AVSS = –2.5V, DVDD = 3.3V, V
REF
= 2.5V, VREFN = AVSS, f
CLK
= 7.3728MHz, and
f
DATA
= 60SPS, unless otherwise noted.
NOISE DISTRIBUTION HISTOGRAM NOISE DISTRIBUTION HISTOGRAM
Figure 2. Figure 3.
NOISE DISTRIBUTION HISTOGRAM NOISE DISTRIBUTION HISTOGRAM
Figure 4. Figure 5.
EFFECTIVE NUMBER OF BITS vs TEMPERATURE EFFECTIVE NUMBER OF BITS HISTOGRAM
Figure 6. Figure 7.
Copyright © 2009–2011, Texas Instruments Incorporated 7