DDC114IRTCT Datasheet, PDF (6/35 Pages) Texas Instruments – Quad Current Input, 20-Bit Analog-To-Digital Converter

DDC114
SBAS255C − JUNE 2004 − REVISED APRIL 2009
www.ti.com
TYPICAL CHARACTERISTICS
At T_A = +25°C, characterization done with Range 5 (250pC), AVDD = +5V, DVDD = 3V, V_REF = +4.096V, Low Power Mode: T_INT = 400µs and CLK = 4MHz, unless
otherwise noted.
45
40
35
30
25
20
15
10
5
0
0
NOISE vs C_SENSOR
Range 1
Range 2
Range 7
100
200
300
400
500
C_SENSOR (pF)
NOISE vs C_SENSOR
Noise (ppm of FSR, rms)
C_{SENSOR Range Range Range Range Range Range Range Range}
(pF) 0
1
2
3
4
5
6
7
0 23.6 7.3 5.2 4.4 4.2 4.0 3.8 3.7
24 30.8 10.4 6.7 5.5 4.9 4.5 4.3 4.1
50 36.3 12.3 8.2 6.5 5.6 5.1 4.8 4.4
75 41.3 14.4 8.9 7.2 6.0 5.4 5.1 4.7
100 46.1 16.0 10.0 8.0 6.7 5.9 5.4 5.0
150 57.0 18.8 11.9 9.2 7.8 6.8 6.1 5.7
200 68.1 21.7 13.5 10.2 8.6 7.6 6.8 6.4
300 89.3 27.7 16.3 12.5 10.6 9.0 8.1 7.4
500 134.0 38.9 22.4 16.6 13.5 11.7 10.4 9.5
NOISE vs T_INT
6
C_SENSOR = 50pF
5
4
C_SENSOR = 0pF
3
2
1
Range 5
0
0.1
1
10
100
T_INT (µs)
1000
NOISE vs INPUT LEVEL
8
7
6
C_SENSOR = 50pF
5
C_SENSOR = 0pF
4
3
2
1
Range 5
0
0 10 20 30 40 50 60 70 80
Input Level (% of Full−Scale)
90 100
NOISE vs TEMPERATURE
14
C_SENSOR = 50pF
12
Range 1
10
Range 2
Range 3
8
6
4
Range 7
2
0
−40
−15
10
35
60
85
Temperature (_C)
6
2000
1500
RANGE DRIFT vs TEMPERATURE
All Ranges
1000
500
0
−500
−1000
−1500
−2000
−40
−15
10
35
60
85
Temperature (_ C)