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ON Semiconductor has introduced a new range of common mode filter (CMF) devices with integrated electrostatic discharge (ESD) protection to suppress noise and provide strong signal integrity.

The new EMI2121, EMI4182 and EMI4183 devices are suitable for implementation in smartphones, media tablets, wireless connectivity dongles and digital camcorders, as well as set-top boxes and DVD players.

Unlike traditional electromagnetic interference (EMI) filters, these CMFs are realised in silicon, making them better suited to suppress EMI to deeper levels and at higher frequencies than ceramics or ferrite-based solutions.

ON Semiconductor claims that integrating ESD protection with EMI suppression offers space savings of up to 50 per cent compared to competitive solutions.

The EMI2121 single-pair CMF, EMI4182 dual-pair CMF and EMI4183 triple-pair CMF all offer a common mode rejection of 15dB at 500MHz and an insertion loss of only 1dB (typical) at 500MHz.

Their high differential mode bandwidth cut-off frequency ensures high levels of signal integrity.

The devices feature integrated ESD protection that meets a peak discharge of 15kV per the IEC61000-4-2 standard.

They support an operating temperature range of -40 to +85C and each has a clamping voltage of 32V, which the company claims is typically at least 30 times better than existing ceramic solutions.

The new devices are optimised for protecting high-speed differential ports using the Mobile Industry Processor Interface (MIPI) DSI, and MIPI CSI2 interface standards, as well as USB 2.0: the current versions of High-Definition Multimedia Interface (HDMI).

The protected CMF family of products supports data speeds of up to 3.4Gbps, well above what is required for the MIPI, USB 2.0 and HDMI interfaces, while providing high levels of signal integrity.

The EMI2121 is offered in a 2.2 x 2.0 x 0.75mm QDFN8 package and is priced at USD0.19 per unit in 10,000 unit quantities.

The EMI4182 is offered in a 2.5 x 2.0 x 0.75mm 10-pin WDFN package and is priced at USD0.25 per unit in 10,000 unit quantities and the EMI4183 is offered in a 4.0 x 2.0 x 0.75mm 16-pin WDFN package and priced at USD0.39 per unit in 10,000 unit quantities.

Both the EMI4183 and EMI4182 are available now, with the EMI2121 releasing in June.

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