Chapter3 HardwareOverview
©NationalInstruments Corporation 3-7 ATE Series User Manual
12 channels—four differentially configured channels and eight
single-ended channels. Table 3-1 describes the three input configurations.
Formore information about the three types of input configuration,refer to
the Analog Input Signal Connections section of Chapter 4, Connecting
Signals, which contains diagrams showing the signal paths for the three
configurations.
Input Polarity and Input Range♦AT-MIO-16E-1,AT-MIO-16E-2, AT-MIO-64E-3,AT-MIO-16E-10, and
AT-MIO-16DE-10
Thesed eviceshave two input polarities—unipolar and bipolar. Unipolar
input means that the input voltage range is between 0 and Vref, where Vref
is a positivereference voltage. Bipolar input means that the input voltage
rangeis between –Vref/2 and +Vref/2. The AT-MIO-16E-1,
AT-MIO-16E-2,AT-MIO-64E-3, AT-MIO-16E-10,and
AT-MIO-16DE-10have a unipolar input range of 10 V (0 to 10 V) and a
bipolar input range of 10 V (±5 V). Youcan program polarity and range
settingson a per channel basis so that you can configure each input channel
uniquely.
The software-programmablegain on these devices increases their overall
flexibility bymatching the input sig nal ranges to those that the ADC can
accommodate.The AT-MIO-16E-1,AT-MIO-16E-2, AT-MIO-64E-3,
Table3-1. Available Input Configurations for the AT E Series
Configuration Description
DIFF Achannel configured in DIFF mode uses two analog
channelinput lin es. One line connects to the positive
inputof the device programmable gain
instrumentation amplifier (PGIA), and the other
connects to the negativeinput of the PGIA.
RSE A channel configuredin RSE mode uses one analog
channel input line, which connects to the positive
input of the PGIA. The negativeinput of the PGIA
is internally tied to AI ground (AIGND).
NRSE Achannel configured in NRSE mode uses one analog
channel input line, which connects to the positive
input of the PGIA. The negativeinput of the PGIA
connects to the AI sense (AISENSE) input.