NI 9237 Operating Instructions and Specifications 16 ni.com
The 150 mW limit allows you to power half and full bridges as
follows:
•Four 350 Ω half bridges at 5.0 V
•Four 350 Ω full bridges at 3.3 V
•Four 120 Ω half bridges at 2.5 V
If you need an excitation voltage that causes more than 150 mW to
dissipate across all the bridges, use the EX+ and EX– terminals on
the external excitation voltage connector to connect an external
excitation source to the NI9237.
Understanding NI 9237 Filtering
The NI 9237 uses a combination of analog and digital filtering to
provide an accurate representation of in-band signals while
rejecting out-of-band signals. The filters discriminate between
signals based on the frequency range, or bandwidth, of the signal.
The three important bandwidths to consider are the passband, the
stopband, and the alias-free bandwidth.
The NI 9237 represents signals within the passband, as quantified
primarily by passband flatness and phase nonlinearity. All signals
that appear in the alias-free bandwidth are either unaliased signals