Current Test Terminal (Itest) - Measurement Computing USB-3102 User Manual

Four analog voltage output (16-bit), four analog current output (16-bit) eight digital i/o, one 32-bit event counter, full-speed usb 2.0 device
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USB-3102 User's Guide
+
Floating Supply
Floating Ext.
IOUTn+1
Supply
IOUTn+2
IOUTn+2
+
Floating Supply
Floating Ext.
IOUTn+1
Supply
IOUTn+1
IOUTn+1
+
Floating Supply
Floating Ext.
IOUTn+1
Supply
IOUTn
IOUTn
AGND
Connection with
grounded load
Refer to the manufacturer's information for the device being controlled for additional details.

Current Test terminal (ITEST)

The
ITEST
connection (pin 51) is used with InstaCal to test the functionality of the analog current output
(IOUT) pins. The ITEST connection circuit is shown in Figure 7.
Do not test more that one current output pin at a time. The
intended for test purposes only.
Grounded
Load
Figure 6. Typical analog current output circuit
Limit one channel
ITEST
IOUTn
Figure 7. Current output test circuit
Floating Load
IOUTn+2
Floating Load
IOUTn+1
Floating Load
IOUTn
AGND
Connection with
grounded supply
output is not adequate for application use. It is
ITEST
16
Functional Details
IOUTn+2
IOUTn+1
+
IOUTn
Grounded
External
Supply

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