There are so many VRs and jumpers that if makes QC and re-calibration very
difficult. Every step must be handled manually, meaning that calibrating these
D/A boards is not an enjoyable task.
When we designed the PISO-DA/PIO-DA series, we tried to remove many/the
these majorities of VRs and jumpers, but still retain the same precision and
performance. In the long run, we selected a 14-bit D/A converter and adapted
the software calibration to provide at least the same performance and precision
as the A-626/A-628:
Configuration
Equivalent Bits
Resolution
-10 V ~ +10 V
14-bit
1.22 mV
0 V ~ 10 V
13-bit
1.22 mV
-5 V ~ +5 V
13-bit
1.22 mV
0 V ~ +5 V
12-bit
1.22 mV
0 mA ~ 20 mA
13-bit
2.70
μ
A
4 mA ~ 20 mA
13-bit
2.70
μ
A
All these VRs and jumpers have been removed.
All calibrations can be performed using software.
All channel configurations can be selected using software, meaning that
there is no need to change any hardware.
Precision is at least the same as the A-626/A628.
All 16 channels can be configured and used in different configurations at the
same time. (For example, channel_0=
±
10 V, channel_1=4~20 mA,
channel_2=0~5 V, etc)
All these features can be implemented on a small, compact and reliable
half-size PCB.
PIO-DA/PISO-DA Series User Manual (Ver.2.9, Feb. 2011, PMH-009-29 )
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