Atec Agilent-346a - Manual (Page 9)

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Figure 3.2. Elastomeric probing solution
1/4 flex adapter
(4 required to connect all pins)
Elastomeric
probe adapter
Retainer
TQFP IC
QFP Package Probing
Figure 3.1. Locator tool aligning
retainer on the device
Locator tool
Retainer
TQFP IC
connections to the pins on its
respective side of the QFP device.
Additional retainers and locator
tools are also available. A kit of
five retainers and adhesive is
available as option #201. The
locator tool is option #202. These
option numbers apply to any
of the listed elastomeric probe
adapter model numbers, for
example, Agilent E5374A #202.
Package Pin Pitch Elastomeric Probe Adapter 1/4 Flex Adapter
144-pin TQFP 0.5 mm E5336A E5340A
144-pin PQFP/CQFP 0.65 mm E5361A E5340A
160-pin PQFP/CQFP 0.65 mm E5373A E5349A
160-pin TQFP 0.5 mm E5377A E5349A
176-pin TQFP 0.5 mm E5348A E5349A
208-pin PQFP/CQFP 0.5 mm E5374A E5371A
240-pin PQFP/CQFP 0.5 mm E5363A E5371A
Table 2. Elastomeric probe adapters
If your target contains ASICs,
FPGAs, or other devices in an
industry-standard QFP configura-
tion, Agilent Technologies has a
series of elastomeric probes from
which you can choose. Agilent’s
state-of-the-art elastomeric
probing technology offers an
inexpensive, convenient, and
reliable solution for 0.5 mm
and 0.65 mm high-density
TQFP/CQFP/PQFP packages.
The elastomer material on the
probe makes contact between the
probe and the pins of a device.
Embedded on the surface of the
elastomer are redundant connec-
tions for each pin, which ensure a
reliable and rugged connection.
A locator tool, included with the
probe adapter, correctly aligns
the retainer to the device. A small
amount of adhesive on the bottom
of the retainer holds the retainer
firmly to the device. After the
adhesive is set, the locator tool
can be removed. The elastomeric
probe adapter then attaches to
the device, held in place by the
retainer and its knurled nut. Five
retainers, a locator tool, and
adhesive are included with each
elastomeric probe adapter.
Additional Accessories
Quarter flex adapters, shown in
Figure 3.2, are available to bring
the signals from the elastomeric
probe adapter to general-purpose
headers for easy connection to
logic analyzers, oscilloscopes,
or other test equipment. Four
1/4 flex adapters are required
to view all signals on a device.
Each 1/4 flex adapter provides