Operation Theory
53
ADLINK Technology Inc.
PCI-9524
Copyright 2008
User’s Manual
Table 4-1: Data Rates vs. Multiplexing, Auto-zero &
ADC Sampling Rates, in Samples-per-second (SPS)
Non-multiplexed
Multiplexed
ADC
Sampling
Rate
Auto-zero
Disabled
Auto-zero
Enabled
Auto-zero
Disabled
Auto-zero
Enabled
30,000
30,000
818.73 1637.47 818.73
15,000
15,000
768.40 1536.81 768.40
7,500
7,500
703.53 1407.06 703.53
3,750
3,750
594.74 1189.48 594.74
2,000
2,000
462.66 925.33 462.66
1,000
1,000
316.32 632.63 316.32
500
500
193.75 387.49 193.75
100
100
47.26** 94.51 47.26**
60*
60
29.00 58.00 29.00
50**
50
24.29 48.59 24.29
30*
30
14.74 29.49 14.74
25**
25
12.32 24.64 12.32
15*
15
7.44 14.87 7.44
10***
10
4.97 9.94 4.97
5***
5
2.49 4.99 2.49
2.5***
2.5
1.25 2.5 1.25
4.2.5
Power Line Noise Rejection
The SINC filter built into the PCI-9524 works best for suppressing
power line noise, if the ADC sampling rate is set to match power
line frequency. The harmonics of the power line noise can also be
suppressed as well, see Table 4-3 for illustration. For applications
demanding high-stability, low-drifting measurements, selecting a
sampling rate that provides inherent power line noise rejection is
recommended.
NOTE:
NOTE:
1) For the equivalent data rate per channel, divide the multi-
plexed data rate figures by four.
2) *60 Hz Rejection, **50 Hz Rejection, ***Simultaneous 50
and 60 Hz Rejection.
3) Auto-zero function is always disabled for general purpose
input channels, i.e. channels 4 to 7.
