INT7 A/D Converter
6 Tables and specifications
6.4 Technical data
Tab 4: Technical data of the INT7 board:
Parameter
Description
Converter type:
24-bit δΣ (delta – sigma)
Analog inputs:
differential
Number of
channels:
1, 2 or 4 fully independent and isolated
Input range:
unipolar and bipolar, each channel independently 156, 1 250
or 10 000 mV
Input impedance:
> 10 MΩ
Sample rate:
10, 25.04, 50.08, 100.16 Hz
Non-linearity:
< 0.003 %
Temperature
dependence
< 10 ppm/°C
Digital inputs:
4 TTL (5 V), first two can be also controlled using the built-in
optocouplers (5 mA current)
Digital outputs:
8 TTL (5 V, maximum current load per output 20 mA,
maximum total current load 100 mA), the first four control
relays (switching contacts rating: max. switching current 0.5
ADC, max. contact resistance 150 mΩ, max. voltage 100 V)
Tab 5: Typical noise free resolution for various acquisition speeds and input ranges:
10 V
1 250 mV
156 mV
10 Hz
20 bit
19 bit
16 bit
50 Hz
18 bit
17 bit
15 bit
100 Hz
17 bit
15 bit
14 bit
- 38 -
