Acromag, Inc. Tel: 248-295-0880
- 33 -
Model SP33X-0700
4-Wire DC I/V Signal Splitter w/USB
Output Range:
Each output channel has separate voltage and current output
terminals that share a return terminal. Only one output signal, voltage or current,
may be loaded per output channel at one time. Supported output ranges with over-
range are shown in Table 3 below.
Output Resolution:
Each output is driven by a 16-bit voltage/current DAC, Texas
Instruments DAC8760IPWPR. The resolution per nominal output range is indicated in
the Table 3 below. Note that nominal ranges may be rescaled in the unit and
resolution will drop 1 bit for every halving of the range. The actual I/O resolution of
a unit will be the lowest resolution of the input A/D, and output D/A relative to the
selected/scaled I/O range.
16-bit
TABLE 3: OUTPUT RANGES AND RESOLUTION w/OVER-RANGE
DAC
Voltage Output
Current Output
COUNT
0-5V
0-10V
±5V
±10V
0-20mA
4-20mA
0
0V
0V
-5.5V
-11V
0mA
0mA
2979
-5.0V
-10V
10923
4mA
4mA
54612
20mA
20mA
59577
5.0V
10.0V
62556
+5.0V
+10V
65535
5.5V
11.0V
+5.5V
+11V
24mA
24mA
RES
1/59577
1/59577 1/59577 1/59577 1/54612
1/43689
1 lsb
83.925uV 167.8uV 167.8uV 335.7uV 0.34132uA 0.34132uA
%Span
0.001678%
0.001707% 0.002133%
Output Accuracy:
Better than
0.05% of span, typical, and ±0.1% maximum, with
nominal input and output ranges. This includes the effects of repeatability, terminal
point conformity, and linearization, but does not include sensor error.
Output Noise/Ripple:
Less than
0.1% of output span, typical.
Note (High Speed Acquisition): Additional filtering at the load is recommended for
sensitive applications with high-speed acquisition rates. For excessive 60Hz supply
ripple with current output, a 1uF or larger bulk capacitor is recommended at the
load. High frequency noise is often reduced or eliminated by placing a 0.1uF or
0.01uF capacitor directly across the load (this can also raise RF immunity).
IMPORTANT:
Input and output ranges may be rescaled to ranges smaller than
nominal, which can increase potential error as resolution and signal-to-noise ratio
are diminished for small I/O spans. In general, rated accuracy can be achieved for
effective I/O resolution equal or greater than 12-bit (1/4096).
Output Load:
The voltage output can drive loads down to 1KΩ minimum. The
current output can drive 21mA DC into 0-
525Ω.
Output Ambient Temperature Drift:
Better than
80ppm/
C (±0.0080%/
C) over the
ambient temperature range. This includes the combined effect of zero and span drift
for reference test conditions (see Input Specifications).
Output Response Time:
The maximum time measured for the output signal to reach
98% of its transition for a step change in the input driving current output to a 500Ω
load with the input set to No filter, Low filter, Medium filter, and High filter.
Output