Datasheet

ADS1255
ADS1256
SBAS288K − JUNE 2003 − REVISED SEPTEMBER 2013
www.ti.com
8
TYPICAL CHARACTERISTICS
T
A
= +25°C, AVDD = 5V, DVDD = 1.8V, f
CLKIN
= 7.68MHz, PGA = 1, and V
REF
= 2.5V, unless otherwise noted.
OFFSET DRIFT HISTOGRAM
PGA = 1 90 Units from 3 Production Lots
Offset Drift (nV/
_
C)
25
20
15
10
5
0
Percent of Population
−
500
−
450
−
400
−
350
−
300
−
250
−
200
−
150
−
100
−
50
0
50
100 150 200 250 300 350 400 450 500
OFFSET DRIFT HISTOGRAM
90 Units from 3 Production Lots
Offset Drift (nV/
_
C)
30
25
20
15
10
5
0
Percent of Population
−
20
−
18
−
16
−
14
−
12
−
10
−
8
−
6
−
4
−
2
0 2 4 6 8
10 12 14 16 18 20
PGA = 64
GAIN ERROR HISTOGRAM
90 Units from 3 Production Lots
Gain Error (%)
30
25
20
15
10
5
0
Percent of Population
−
0.0100
−
0.0095
−
0.0090
−
0.0085
−
0.0080
−
0.0075
−
0.0070
−
0.0065
−
0.0060
−
0.0055
−
0.0050
−
0.0045
−
0.0040
−
0.0035
−
0.0030
−
0.0025
−
0.0020
−
0.0015
−
0.0010
−
0.0005
0
PGA = 1
GAIN ERROR HISTOGRAM
90 Units from 3 Production Lots
Gain Error (%)
25
20
15
10
5
0
Percent of Population
−
0.060
−
0.057
−
0.054
−
0.051
−
0.048
−
0.045
−
0.042
−
0.039
−
0.036
−
0.033
−
0.030
−
0.027
−
0.024
−
0.021
−
0.018
−
0.015
−
0.012
−
0.009
−
0.006
−
0.003
0
PGA = 64
GAIN DRIFT HISTOGRAM
90 Units from 3 Production Lots
Gain Drift (ppm/
_
C)
25
20
15
10
5
0
Percent of Population
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
PGA = 1
GAIN DRIFT HISTOGRAM
90 Units from 3 Production Lots
Gain Drift (ppm/
_
C)
25
20
15
10
5
0
Percent of Population
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
PGA = 64