Interconnection
Figure 3 (a) and (b). Signal integrity test results
up to ±0.8 mm from the connector’s centre line, in each axis.
Critical challenges when developing
fl oating connectors include ensuring proper engagement upon initial mating, as well as maintaining consistent and continuous electrical contact between the individual connections. To address this, the contacts in the male side of the Flecto connector are designed to fl ex and the housings are suspended by the contacts. This allows the mechanical and electrical features to engage fully as the two parts are pushed together. The spring action of the suspension mechanism
ensures electrical integrity by absorbing shock and vibration to ensure the connections remain continuously in contact. While the mating sections are designed
to fl ex, to accommodate alignment errors, locating pegs in the connector base can ensure overall positional accuracy when inserted in corresponding holes in the PCB. Connectors are available with 0.5 mm, 0.63 mm, and 0.8 mm interconnect pitch, including a series that combines signal pins on 0.5 mm pitch with 3.0A power contacts. The power contacts are designed to assist with blind mating and through-board solderable posts provide extra location accuracy
and mechanical strength. The signal-only connectors in the family rely on additional SMT hold-downs for high peel strength.
Supporting high data rates To help designers address the demand of ever-increasing data rates in high-speed communication applications, connectors are tested for insertion loss, return loss, impedance, and Near End Crosstalk (NEXT). With NEXT of -40 dB or better, across a wide frequency range, and with low insertion and return loss, Flecto can address applications such as machine vision, medical imaging, and
EVs. The performance of the F20 series, shown in fi gure 3 (a) and (b), allows these connectors to handle data speeds up to 12 Gbit/s.
Summary
Connecting stacked PCBs usually calls for extreme accuracy if more than one board-to- board connector is required. Floating connectors alleviate demands for absolute positional accuracy while also ensuring reliability and signal integrity to address a wide variety of industrial, medical, and EV applications.
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