Test sockets show bigger bandwidth

New test measurements for Aries centre probe test sockets show a 30% improvement in bandwidth over earlier tests.

New test measurements for Aries centre probe test sockets show a 30% improvement in bandwidth over earlier tests.

The new measurements, from the well-known independent test lab GateWave Northern, were taken from a 5.0mm squre MLF/QFN package, with pads on a 0.50mm pitch.

The centre probe test sockets accommodate pitches as small as 0.50mm and apply PCB preload when mounted.

When measured for time, the test socket had a signal delay of 15.0ps, an open circuit rise time of less than 34.5ps, a short circuit rise time of better than 30.0ps, and a rise time through 50ohm of less than 31.5ps.

When measured for frequency, the centre probe had an insertion loss of less than 1dB up to 18.5GHz, and less than 3dB to 39.7GHz and VSWR (voltage standing wave ratio) of better than 2:1 to 38.3GHz.

The test lab also measured equivalent circuit parameters: pin inductance was 0.59nH; pin-to-ground capacitance was 0.31pF; mutual inductance was 0.338nH; mutual capacitance was 0.12pF; transmission line impedance was 44.9ohm; and the electrical length of the line model was 15.0ps.

During the test, the signal path was only 1.95mm and total probe movement was 0.584mm.

All Aries sockets are available in custom materials, platings, sizes and configurations to suit specific customer applications.

Pricing for a 20 lead MLF socket starts at $365 each for one to four pieces.

Delivery is six weeks ARO.

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