ADS1274
ADS1278
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SBAS367–JUNE 2007
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, High-Speed mode, AVDD = +5V, DVDD = +1.8V, IOVDD = +3.3V, fCLK = 27MHz, VREFP = 2.5V, and
VREFN = 0V, unless otherwise noted.
OFFSET DRIFT HISTOGRAM
GAIN DRIFT HISTOGRAM
400
350
300
250
200
150
100
50
900
800
700
600
500
400
300
200
100
0
Multi-lot data based on
25 units based on
20°C intervals over the
range -40°C to +105°C.
20°C intervals over the
range -40°C to +105°C.
Outliers: T < -20°C
0
Offset Drift (mV/°C)
Gain Drift (ppm/°C)
Figure 25.
Figure 26.
OFFSET WARMUP DRIFT RESPONSE BAND
GAIN WARMUP DRIFT RESPONSE BAND
40
30
20
10
0
40
30
20
10
0
ADS1278 High-Speed and High-Resolution Modes
ADS1278 Low-Power Mode
ADS1274/78 High-Speed and High-Resolution Modes
ADS1278 Low-Power Mode
-10
-10
-20
-30
-40
-20
-30
-40
ADS1278 Low-Speed Mode
ADS1278 Low-Speed Mode
ADS1274 High-Speed and High-Resolution Modes
0
50
100
150
200
250
300
350
400
0
50
100
150
200
250
300
350
400
Time (s)
Time (s)
Figure 27.
OFFSET ERROR HISTOGRAM
Figure 28.
GAIN ERROR HISTOGRAM
90
40
35
30
25
20
15
10
5
High-Speed Mode
25 Units
High-Speed Mode
25 Units
80
70
60
50
40
30
20
10
0
0
Offset (mV)
Gain Error (ppm)
Figure 29.
Figure 30.
14
Copyright © 2007, Texas Instruments Incorporated
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