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Table 4-6. I/O Signal Summary for the AT-MIO-16XE-50 (Continued)
Signal Name
FREQ_OUT
1
DIO<6..7> are also pulled down with a 50 k resistor.
AI = Analog Input
DIO = Digital Input/Output pu = pull up
AO = Analog Output
DO = Digital Output
The tolerance on the 50 k pull-up and pull-down resistors is very large. Actual value may range between 17 k and 100 k .
Analog Input Signal Connections
Caution
Exceeding the differential and common-mode input ranges distorts the input
signals. Exceeding the maximum input voltage rating can damage the AT E Series device
and the PC. NI is not liable for any damage resulting from such signal connections. The
maximum input voltage ratings are listed in Tables 4-3 through 4-6 in the Protection
column.
© National Instruments Corporation
Impedance
Input/
Drive
Output
DO
—
AT-MIO-16E-1,
AT-MIO-16XE-10, AT-AI-16XE-10, and AT-MIO-16XE-50
The AI signals are ACH<0..15>, AISENSE, and AIGND. The
ACH<0..15> signals are tied to the 16 analog input channels of the
AT E Series device. In single-ended mode, signals connected to
ACH<0..15> are routed to the positive input of the device PGIA.
In differential mode, signals connected to ACH<0..7> are routed to the
positive input of the PGIA, and signals connected to ACH<8..15> are
routed to the negative input of the PGIA.
AT-MIO-64E-3
The AI signals are ACH<0..63>, AISENSE, AISENSE2, and AIGND. The
ACH<0..63> signals are tied to the 64 AI channels of the AT-MIO-64E-3.
In single-ended mode, signals connected to ACH<0..63> are routed to the
positive input of the AT-MIO-64E-3 PGIA. In differential mode, signals
connected to ACH<0..7, 16..23, 32..39, 48..55> are routed to the positive
input of the PGIA, and signals connected to ACH<8..15, 24..31, 40..47,
56..63> are routed to the negative input of the PGIA.
Protection
(Volts)
Source
On/Off
(mA at V)
—
3.5 at
(V cc –0.4)
-MIO-16E-2, AT-MIO-16E-10, AT-MIO-16DE-10,
4-15
Chapter 4
Connecting Signals
Rise
Sink
Time
(mA at V)
(ns)
Bias
5 at 0.4
1.5
50 k pu
AT E Series User Manual
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