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©
National Instruments Corp.
15
NI 9215 Operating Instructions and Specifications
NI 9215 Circuitry
The NI 9215 channels share a common gro
u
nd that is isolated from
other mod
u
les in the system. The NI 9215 protects each channel
from overvoltages. For more information abo
u
t overvoltage
protection, refer to the
section. The incoming analog
signal on each channel is b
u
ffered and conditioned by the
instr
u
mentation amplifier and is then sampled by a 16-bit ADC.
The channels have independent track-and-hold amplifiers that
allow yo
u
to sample all fo
u
r channels sim
u
ltaneo
u
sly. Refer to
Fig
u
u
t circ
u
itry ill
u
strations of the NI 9215 with
screw terminal and the NI 9215 with BNC.