DDC112 Datasheet, PDF (4/24 Pages) Burr-Brown (TI) – Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER

TYPICAL PERFORMANCE CURVES
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.
70
60
50
40
30
20
10
0
0
NOISE vs C_SENSOR
Range 1
Range 0
(C_EXT = 250pF)
Range 2
Range 7
200
400
600
800
1000
C_SENSOR (pF)
NOISE vs T_INT
6
5
C_SENSOR = 50pF
4
C_SENSOR = 0pF
3
2
Range 5
1
0
0.1
1
10
100
T_INT (ms)
1000
NOISE vs INPUT LEVEL
5
4.5
4 ^CSENSOR ^{= 50pF}
3.5
3
C_SENSOR = 0pF
2.5
2
1.5
1
Range 5
0.5
0
10 20 30 40 50 60 70 80 90
Input Level (% of Full-Scale)
10 100
NOISE vs TEMPERATURE
9
Range 1
8
7
6
Range 2
5
Range 3
4
3
2
C_SENSOR = 0pF
1
Range 7
0
–40
–15
10
35
60
85
Temperature (°C)
2000
1500
RANGE DRIFT vs TEMPERATURE
Ranges 1 - 7
(Internal Integration Capacitor)
1000
500
0
–500
–1000
–1500
–40
–15
10
35
60
85
Temperature (°C)
I_B vs TEMPERATURE
10
All Ranges
1
0.1
0.01
25
35
45
55
65
75
85
Temperature (°C)
®
DDC112
4