Dewetron DEWE-ORION-0824-20 Series, Technical Reference Manual

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Page 56
DEWE-ORION-0824-20x
4 Specifications
4.1 Analog input
Analog input
Channel characteristics
Number of channels 8, simultaneously sampled
Input configuration Symmetric, differential or single ended
Resolution 24-bit, nominal
Type of ADC Delta-sigma
Sampling rate 204.8 kS/s per channel
Data throughput 1.6 MS/s
Oversampling, for sample rate (fs)
Frequency accuracy ±35 ppm
1 kS/s
≤
f
s
≤
51.2 kS/s 256 f
s
51.2 kS/s
<
f
s
≤
102.4 kS/s 128 f
s
102.4 kS/s < f
s
≤
204.8 kS/s
64 f
s
Input signal range ±10 V, ±2 V, ±0.5 V, ±0.1 V peak
FIFO buffer size 4096 samples
Data transfers DMA
Transfer characteristics
DC accuracy % of reading % of range
Range ±10 V ±0.05 % ± 0.01 %
±2 V ±0.05 % ± 0.012 %
±0.5 V ±0.05 % ± 0.02 %
±0.1 V ±0.05 % ± 0.06 %
Gain drift ±15 ppm/K
Amplifier characteristics
Input impedance (ground referenced)
Positive input to negative input 1 M
Ω
each with 60 pF to GND
Positive input to GND 7.8 M
Ω
in parallel with 60 pF
Negative input to GND
10 M
Ω
in parallel with 60 pF
Overvoltage protection
Positive input ±30 V
Negative input ±30 V
Common mode rejection (CMR)
Range ±10 V ±2 V ±0.5V ±0.1 V
f
in
< 1 kHz
> 60 dB, typ. > 74 dB, typ. > 86 dB, typ. > 100 dB, typ.
Flatness digital filter
1 kS/s
≤
f
s
≤
51.2 kS/s -0.035 dB to +0.01 dB, DC to 0.475 f
s
51.2 kS/s
<
f
s
≤
102.4 kS/s
-0.035 dB to +0.01 dB, DC to 0.45 f
s
102.4 kS/s < f
s
≤
204.8 kS/s -0.035 dB to +0.01 dB, DC to 0.246 f
s
-3 dB Bandwidth digital filter
1 kS/s
≤
f
s
≤
51.2 kS/s 0.494 f
s
51.2 kS/s
<
f
s
≤
102.4 kS/s 0.49 f
s
102.4 kS/s < f
s
≤
204.8 kS/s 0.38 f
s
Analog bandwidth
Range ±10 V ±2 V ±0.5V ±0.1 V
-1 dB Bandwidth 225 kHz 225 kHz 200 kHz 80 kHz
-3 dB Bandwidth 360 kHz 360 kHz 320 kHz 150 kHz
Maximum working voltage
Channel-to-ground, channel-to-channel 10 V, installation category I
Max. working voltage refers to the signal voltage plus common-mode voltage.