The contact resistance of the Pico Probe is less than 50 milliohms. The self-inductance is 0.30 nH. And bandwidths up to 10 GHz, all combine to make the Pico Probe virtually transparent electrically during test.
The straight signal path of the Pico Probe, within the test socket, allows the DUT board pattern to be a mirror image of the device. The socket surface mounts to the DUT board with a permanent preloaded on the Pico Probes, ensuring a constant contact and eliminating "board scrubbing" problems inherent with wiping contacts.
The Pico Probe features impedance of 50 ohms and a bandwidth of 7.8 GHz at -1 dB. Self inductance is 0.33 nH at .65 mm pitch, while mutual inductance is 0.003 nH at .65 mm pitch diagonal and 0.05 nH at .65 mm pitch adjacent. Capacitance is 0.045 pF. The Pico Probe's current carrying capacity is 5 amps continuous (individual probe in free air at ambient temperature). It operates over a temperature range of -55°C to 150°C.
The socket model is valid from DC to 3.05 GHz. The measured and modeled transmission response agrees within 0.3 dB. A model was extracted for four types of pins: adjacent field pins, field pin oriented diagonally, edge pins, and corner pins.
Synergetix, 310 South 51st Street, Kansas City, KS 66106; (913) 342-0404; www.synerget.com