
6 Device PowerSupply General Purpose Power Supply (GPDPS)
164 System Reference, January 2001
Current and Voltage Measurements
with DPS
Device Operation Sequence
The figure below shows a typical device operation
sequence.
Figure 76 Device Operation Sequence
1. Connect: Please note the transient time. The current
measurement will be incorrect, if measured too quickly
after the connect phase. The transient time depends on
the test environment (load capacitance, device etc.). Be
cautious if initial current measurement is carried out <
~ 5 ms after connect.
2. Functional tests: No measurements during functional
tests.
3. Operating current measurement: Normally, digital
operations are required within the device. The current
should be constant to ease sampling.
connect
digital operations
device stop
device restart
IDDQ measurement
wait for
current
settling
disconnect
operating
current
measurement
functional
tests
functional
tests
digital operations
U
device
time
123 4 5
Comentários a estes Manuais