Datasheet

®
DDC101
10
TYPICAL PERFORMANCE CURVES
ELECTRICAL
System Clock = 2MHz, V
S
= ±5VDC, V
REF
= –2.5V, L = 1 Integration/Conversion, and T
A
= +25°C, unless otherwise noted.
SINAD AT 10kHz CONVERSION, UNIPOLAR INPUT
0
0
20
40
60
80
100
500 1000 1500 2000 2500 3000 3500 4000 4500 5000
0dB
–60dB
Input Frequency (Hz)
THD + N (dB)
100µs Integration Time
K = 16 Acquisition Clocks
M = 32 Oversamples
SINAD AT 1kHz CONVERSION, UNIPOLAR INPUT
0
0
20
40
60
80
100
50 100 150 200 250 300 350 400 450 500
0dB
–60dB
Input Frequency (Hz)
THD + N (dB)
1ms Integration Time
K = 16 Acquisition Clocks
M = 128 Oversamples
NOISE vs INPUT LEVEL (UNIPOLAR) WITH CDS
Noise (ppm, rms)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Input Level of FS
18
16
14
12
10
8
6
4
2
0
C
IN
= 500pF
C
IN
= 100pF
C
IN
= 0pF
1ms Integration Time
K = 16 Acquisition Clocks
M = 128 Oversamples
NOISE vs INPUT LEVEL (UNIPOLAR) WITHOUT CDS
Noise (ppm, rms)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Input Level of FS
18
16
14
12
10
8
6
4
2
0
C
IN
= 500pF
C
IN
= 100pF
1ms Integration Time
M = 128 Oversamples
C
IN
= 0pF
NOISE vs RESISTOR VALUE
1000
100
10
1
Noise (ppm, rms)
0.01 0.1 1 10 100 1G
R
IN
(MΩ)
100µs Int., M = 16 O/S
1ms Int., M = 128 O/S
Low Level, Unipolar Input
K = 16 Acquisition Clocks
CHARGE INJECTION vs INPUT CAPACITANCE
350
300
250
200
150
100
50
0
–50
0 100 200 500 1000
C
IN
(pF)
No CDS
Charge Injection (ppm)
CDS On, K = 16