Jäger ADwin-Pro, System And Hardware Description

Page: 55 / 218

ADwin-Pro Hardware, manual version 2.9, June 2006
51
Pro I: Analog Input Modules
Pro-AIn-16/14-C Rev. A
ADwin
5.5.6 Pro-AIn-16/14-C Rev. A
The analog input module Pro-AIn-16/14-C Rev. A has a 14 bit ADC and a pro-
grammable gain (PGA). It is equipped with 16 differential current inputs (num-
bers 1…8 and 17…24). The inputs are connected to a 37-pin DSUB socket.
The module version with voltage inputs Pro-AIn-32/14 Rev. A is decribed on
page 53 .
The module Pro-AIn-16/14-C Rev. A has an input range of ±20mA and a gain,
programmable by software of 1, 2, 4 or 8. The adjustment of gain and offset is
made by software (see
chapter 6.3.1 "Calibration per Software" ).
In addition, the module has a sequential control, which by request reads the
measurement values from all input channels successively.
Fig. 80 – Pro-AIn-16/14-C Rev. A : Block diagram
Input channels 16 differential
Resolution 14 bit
Conversion time max. 0.5µs
Sampling rate max. 2000ksps
Multiplexer settling time 3µs
Measurement ranges ±20mA
Gain 1, 2, 4, 8 software selectable
Accuracy
INL
typ. ±0.6 LSB, max. ±1 LSB
+0.05% of measured voltage by input resi-
stance
DNL
typ. ±0.3 LSB, max. ±1 LSB
+0.05% of measured voltage by input resi-
stance
Input resistance 500k
Ω
, ±2%
Input over-voltage ±15V
Offset error adjustable
Offset drift ±30 ppm/ºC
Connector 37-pin DSub socket
Fig. 81 – Pro-AIn-16/14-C Rev. A : Specification
AD
w
in
-P
ro
bu
s
A
D
. .
.
Addr.
Data
Data
Registers
Data
PGA
V u= 1, 2, 4, 8
. .
.
MUX
Address
Decoder
Sequence
Control
Control
1+
330k
330k
1-
50
0
R
S
0.05
%
8+
330k
330k
8-
50
0
R
S
0.05
%
24+
330k
330k
24-
50
0
R
S
0.05
%
17+
330k
330k
17-
50
0
R
S
0.05
%
. .
.
. .
.