Datasheet

DDC112
6
SBAS085B
www.ti.com
NOISE vs T
INT
1 10000.1 10010
T
INT
(ms)
Noise (ppm of FSR, rms)
0
1
2
3
4
5
6
C
SENSOR
= 50pF
C
SENSOR
= 0pF
Range 5
TYPICAL CHARACTERISTICS
At T
A
= +25°C, characterization done with Range 5 (250pC), T
INT
= 500µs, V
REF
= +4.096, AV
DD
= DV
DD
= +5V, and CLK = 10MHz, unless otherwise noted.
NOISE vs C
SENSOR
200 8000 1000600400
C
SENSOR
(pF)
Noise (ppm of FSR, rms)
0
10
20
30
40
50
60
70
Range 7
Range 2
Range 1
Range 0
(C
EXT
= 250pF)
NOISE vs INPUT LEVEL
30 4020 9010 10070 80 1050 60
Input Level (% of Full-Scale)
Noise (ppm of FSR, rms)
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
C
SENSOR
= 50pF
C
SENSOR
= 0pF
Range 5
NOISE vs TEMPERATURE
9
8
7
6
5
4
3
2
1
0
–40 –15 10 35 60 85
Temperature (°C)
Noise (ppm of FSR, rms)
Range 1
Range 2
Range 7
Range 3
C
SENSOR
= 0pF
RANGE DRIFT vs TEMPERATURE
–40 –15 10 35 60 85
Temperature (°C)
Range Drift (ppm)
Ranges 1 - 7
(Internal Integration Capacitor)
2000
1500
1000
500
0
–500
–1000
–1500
I
B
vs TEMPERATURE
25 35 45 55 65 75 85
Temperature (°C)
I
B
(pA)
All Ranges
10
1
0.1
0.01