Analog input signal connections, Analog input signal connections -15 – National Instruments AT E Series User Manual
Page 62
Chapter 4
Connecting Signals
© National Instruments Corporation
4-15
Analog Input Signal Connections
♦ AT-MIO-16E-1, ΑΤ-MIO-16E-2, AT-MIO-16E-10, AT-MIO-16DE-10,
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.
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.
FREQ_OUT
DO
—
—
3.5 at
(Vcc–0.4)
5 at 0.4
1.5
50 k
Ω pu
1
DIO<6..7> are also pulled down with a 50 k
Ω resistor.
AI = Analog Input
DIO = Digital Input/Output
pu = pull up
AO = Analog Output
DO = Digital Output
The tolerance on the 50 k
Ω pull-up and pull-down resistors is very large. Actual value may range between 17 kΩ and 100 kΩ.
Table 4-6. I/O Signal Summary for the AT-MIO-16XE-50 (Continued)
Signal Name
Drive
Impedance
Input/
Output
Protection
(Volts)
On/Off
Source
(mA at V)
Sink
(mA at V)
Rise
Time
(ns)
Bias