DDC101 Datasheet, PDF (11/29 Pages) Burr-Brown (TI) – 20-BIT ANALOG-TO-DIGITAL CONVERTER

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
1ms Integration Time
35
M = 128 Oversamples
30
25
No CDS
20
15
10
5
CDS On, K = 16
0
0
100
200
500
1000
2000
C_IN (pF)
NOISE vs OVERSAMPLING, UNIPOLAR INPUT
50
1ms Integration Time
K = 16 Acquisition Clocks
C_IN = 0pF
10
L = 1 Integration/Conversion
1.0
L = 128 _{L = 64}
L = 256
L = 32
L = 16
L=2
L=8 ^L=4
0.5
1
2
4
8 16 32 64 128 256
M Oversamples
CHANGE IN I_B vs TEMPERATURE
2.0
0
–2.0
–4.0
–6.0
–8.0
–40 –20
0
20
40
60
Temperature (°C)
80 100
NOISE vs TEMPERATURE, UNIPOLAR INPUT
5
1ms Integration Time
K = 16 Acquisition Clocks
4
M = 128 Oversamples
3
2
1
0
–40
–20
0
25
45
65
85
Temperature (°C)
NOISE vs INTEGRATION TIME, UNIPOLAR INPUT
5
K = 16 Acquisition Clocks
C_IN = 0pF
M = 16 O/S
4
3
2
M = 64 O/S
M = 256 O/S
1
0
0.1
1
10
100
Integration Time (ms)
0.050
INPUT OFFSET VOLTAGE vs INPUT CAPACITANCE
0.000
–0.050
0.100
–0.150
–0.200
–0.250
–0.300
0
100
500
C_IN (pF)
®
11
DDC101