Measurement Computing CIO-DAS48-I - Manual (Page 15)

15
Chapter 4
Specifications
Typical for 25°C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input
Table 1. Analog input specifications
Parameter Specification
A/D converter type AD574
Resolution 12 bits
Number of channels 24
Input type Current input
Input ranges 4 to 20 mA, 2 to 10 mA, 1 to 5 mA and 0.5 to 2.5 mA, software selectable
Polarity Unipolar/Bipolar, software selectable
A/D pacing Software polled
Data transfer Software polled
A/D conversion time 25 µs
Throughput 20 kS/s, PC dependent
Accuracy ±0.01% of reading ±1 LSB
Differential Linearity error ±1 LSB
Integral Linearity error ±0.5 LSB
No missing codes guaranteed 12 bits
Gain drift (A/D specs) ±25 ppm/°C
Zero drift (A/D specs) ±10 µV/°C
Common mode range ±10 V
CMRR 72 dB
Input leakage current (@ 25 C) 100 nA
Input impedance 100 Ohms
Absolute maximum input voltage ±35 V
Noise distribution (Rate = 1-10 kHz, Average % +/- 2 bins, Average % +/- 1 bin, Average # bins)
4 to 20 mA 100% / 100% / 3 bins
2 to 10 mA 100% / 98.8% / 4 bins
1 to 5 mA 100% / 96.8% / 4 bins
0.5 to 2.5 mA 100% / 98.2% / 5 bins
Power consumption
Table 2. Power consumption specifications
+5 V 620 mA typical, 800 mA max
Environmental
Table 3. Environmental specifications
Operating temperature range 0 to 50 °C
Storage temperature range -20 to 70 °C
Humidity 0 to 90% non-condensing