6 specifications – Measurement Computing PCM-DAS08 User Manual
Page 15
6 SPECIFICATIONS
Typical for 25
o
C unless otherwise specified.
POWER CONSUMPTION
+5V (Normal operation):
30 mA typ, 69 mA max
+5V (During CIS read);
59 mA typ, 98 mA max
ANALOG INPUT SECTION
A/D converter type:
ADS574
Resolution:
12 bits
Number of channels:
8, single-ended
Input Ranges:
±5V (Set at the factory. Other ranges by
special order)
Polarity
Bipolar
A/D Pacing:
Programmable: internal 25 kHz
divided by 1, 2, 3 or 4, external source
(DIn 2 / Ext Trig, falling edge) or software
polled
A/D Trigger sources:
External polled digital input trigger (DIn
2, active level determined by software)
A/D Triggering Modes:
Digital:
Software-polled digital input (software
enables acquisition when appropriate
TTL level is detected).
Data Transfer:
Interrupt or software-polled
A/D conversion time
25 µs
Throughput
25 kHz, PC-dependent
Relative Accuracy (software calibrated):
±0.5 LSB
Differential Linearity error (A/D)
:
±1 LSB
Integral Linearity error (A/D):
±1 LSB
No missing codes guaranteed (A/D):
12 bits
Gain drift (A/D specs):
±45 ppm/°C
Zero drift (A/D specs):
±10 ppm/°C
Input leakage current:
±200 nA over temperature
Input impedance
10 MegOhms min
Absolute maximum input voltage:
±15V
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