Appendix
-
Performance
characteristics
ComTec GmbH
Appendix 4-4
4.2. Performance
characteristics
4.2.1. ADC
Range:
.................................................... 256, 512, 1024, 2048, 4096, 8192
Conversion time:
fixed conversion time ........................................................... 500 ns
Countrate capability:
......................................................................... > 1.000.000 events/s
ADC deadtime:
time-to-peak + 500 ns fixed conversion time + data transfer time of
100 ns to buffer (there could be an additional dead time if the MCA
can not accept the data rates generated by the 7072T - this
depends on the MCA used) .............................................................
Typical ADC deadtime for fast rising input pulses is less than 2 us
per event using FAST ComTec MCAs
Resolution:
8k range, 500ns flat top pulses ...........................
≤
3.4 chs
1
FWHM
Integral non-linearity:
linear fit...................................................... typ. +0.16% @ 8k range
linear fit...................................................... typ. +0.16% @ 4k range
Differential non-linearity:
including effects from integral non-linearity........
±
1.1% @ 8k range
for 99% of usable channels ...............................
±
0.7% @ 8k range
including effects from integral non-linearity........
±
0.7% @ 4k range
for 99% of usable channels ...............................
±
0.5% @ 4k range
Peak shift:
upto 700 kcps, SVA mode ................................................. +0.006%
upto 1000 kcps, SVA mode.................................................. +0.08%
Unused channels:
.................................................................... approx. top 1% of range
Analog bandwidth:
............................................................................................. 3.3 MHz
GATE to sampling delay:
SVA mode: ...................................................................... 0 … 32 ns
1 channels
ADC
0
20000
40000
60000
80000
100000
120000
0
50
0
10
00
15
00
20
00
25
00
30
00
35
00
40
00
45
00
50
00
55
00
60
00
65
00
70
00
75
00
80
00
Channel
C
ount
s
Figure 4.2: PHA, typical noise spectrum
