Datasheet

11
DDC101
®
TYPICAL PERFORMANCE CURVES (CONT)
ELECTRICAL
System Clock = 2MHz, V
S
= ±5VDC, V
REF
= –2.5V, L = 1 Integration/Conversion, and T
A
= +25°C, unless otherwise noted.
NOISE vs INPUT CAPACITANCE, UNIPOLAR INPUT
40
35
30
25
20
15
10
5
0
0 100 200 500 1000 2000
C
IN
(pF)
Noise (ppm, rms)
No CDS
CDS On, K = 16
1ms Integration Time
M = 128 Oversamples
CHANGE IN I
B
vs TEMPERATURE
2.0
0
–2.0
–4.0
–6.0
–8.0
–40 –20 0 20 40 60 80 100
Temperature (°C)
∆ I
B
(pA)
NOISE vs TEMPERATURE, UNIPOLAR INPUT
5
4
3
2
1
0
–40 –20 0 25 45 65 85
Temperature (°C)
Noise (ppm, rms)
1ms Integration Time
K = 16 Acquisition Clocks
M = 128 Oversamples
NOISE vs INTEGRATION TIME, UNIPOLAR INPUT
5
4
3
2
1
0
0.1 1 10 100
Integration Time (ms)
Noise (ppm, rms)
M = 256 O/S
M = 16 O/S
M = 64 O/S
K = 16 Acquisition Clocks
C
IN
= 0pF
INPUT OFFSET VOLTAGE vs INPUT CAPACITANCE
0.050
0.000
–0.050
0.100
–0.150
–0.200
–0.250
–0.300
0 100 500
V
BIAS
(mV)
C
IN
(pF)
NOISE vs OVERSAMPLING, UNIPOLAR INPUT
50
10
1.0
0.5
Noise (ppm, rms)
1248163264128256
M Oversamples
L = 1 Integration/Conversion
L = 2
L = 4
L = 8
L = 16
L = 32
L = 64
L = 128
L = 256
1ms Integration Time
K = 16 Acquisition Clocks
C
IN
= 0pF