ADS1259
SBAS424C –JUNE 2009–REVISED MARCH 2010
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TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, AVDD = +2.5V, AVSS = –2.5V, DVDD = 3.3V, VREF = 2.5V, VREFN = AVSS, fCLK = 7.3728MHz, and
fDATA = 60SPS, unless otherwise noted.
NOISE vs INPUT VOLTAGE
NOISE vs INPUT VOLTAGE
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Data Rate = 10SPS
Data Rate = 60SPS
Internal Reference
CREFIN = 1mF
Internal Reference
CREFIN = 1mF
Ratiometric Configuration
REF5025
Ratiometric Configuration
REF5025
-2.5 -2.0 -1.5 -1.0 -0.5
0
0.5 1.0 1.5 2.0 2.5
-2.5 -2.0 -1.5 -1.0 -0.5
0
0.5 1.0 1.5 2.0 2.5
VIN (V)
VIN (V)
Figure 8.
Figure 9.
NOISE vs REFERENCE VOLTAGE
NOISE vs INPUT VOLTAGE
10
8
10
9
8
7
6
5
4
3
2
1
0
Shorted Input
Internal Reference
CREFIN = 1mF
REF5025
Data Rate = 14.4kSPS
6
Ratiometric Configuration
Data Rate = 14.4kSPS
Data Rate = 10SPS
Data Rate = 16.6SPS
4
Data Rate = 400SPS
2
Data Rate = 14.4kSPS
0
-2.5 -2.0 -1.5 -1.0 -0.5
0
0.5 1.0 1.5 2.0 2.5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Reference Voltage (V)
VIN (V)
Figure 10.
Figure 11.
LINEARITY DEVIATION vs INPUT LEVEL
INTEGRAL NONLINEARITY vs TEMPERATURE
3
2
3.0
2.5
2.0
1.5
1.0
0.5
0
5 Units
T = +125°C
T = +85°C
T = +25°C
T = -40°C
1
0
-1
-2
-3
-2.5 -2.0 -1.5 -1.0 -0.5
0
0.5 1.0 1.5 2.0 2.5
-55 -35 -15
5
25
45
65
85
105 125
Input Signal (V)
Temperature (°C)
Figure 12.
Figure 13.
8
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