Agilent Technologies 93000 SOC Series, Training Manual

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Device Characterization - DC Tests 14-5 Measuring Input Leakage
410
Agilent 93000 SOC Series User Training Part 1, October 2004
14-5 Measuring Input Leakage
It is desirable for input pins to have very high impedance, because this
minimizes the load they represent on the signal driving them, speeding
up that signal & increasing fanout capability. Thus the need for input
leakage tests.
We use the test function “Leakage”:
Select leakage test 1 Select
leakage
from the list of DC Tests.
Figure 260 Testing the Input Leakage
The Leakage test is split into two tests. The first (low level) test is
performed with the values as set in the
LOW
column, the second (high
level) uses the values set in the
HIGH
column.
After selecting Report Mode, Test Mode, and Repeat Mode as required:
Enter appropriate values 2 Type in the pins that are to be tested (for example,
all_in
for the
group of all input pins).
3
Enter a force voltage to be used.
4 Enter a clamp current if the High Precision PMU is used. The
current should be set so as not to damage the device.
5
Enter a precharge voltage if the Pin PMU is used.
6 Enter a value for the pass minimum limit of current.
Any measurement producing a result below this value is treated as
failure.
DUT
Pin Electronics
AC
PPMU
o or io pin
?
A
PPMU