Innovative protected common mode filters support high speed serial interfaces
May 24, 2011 // Paul Buckley
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, the new CMFs from ON Semiconductor are realized in silicon making them better suited to suppress EMI to deeper levels and at higher frequencies than ceramics or ferrite based solutions. Integrating ESD protection with EMI suppression offers space savings of up to 50 percent compared to competitive solutions, translates into significant bill-of-materials (BOM) savings and is a turnkey solution for wireless handset designers.
The EMI2121 single pair CMF, EMI4182 dual pair CMF and EMI4183 triple pair CMF all offer a common mode rejection of 15 dB (typical) at 500 MHz and an insertion loss of only 1.0 dB (typical) at 500 MHz. Their high differential mode bandwidth cutoff frequency ensures high levels of signal integrity. The devices feature integrated ESD protection that meets a peak discharge of 15 kV per the IEC61000-4-2 standard. They support an operating temperature range of −40 to +85 ⁰C, and each have a clamping voltage of 32 V, which typically is at least thirty times better than existing ceramic solutions.
The new devices are optimized for protecting high speed differential ports using the MobileIndustry 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 3.4 Gbps, 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 mm x 2.0 mm x 0.75 mm QDFN8 package and is priced at $0.19 per unit in 10,000 unit quantities. The EMI4182 is offered in a 2.5 mm x 2.0 mm x 0.75 mm 10 pin WDFN package and is priced at $0.25 per unit in 10,000 unit quantities and the EMI4183 is offered in a 4.0 mm x 2.0 mm x 0.75 mm 16 pin WDFN package and priced at $0.39 per unit in 10,000 unit quantities. Both the EMI4183 and EMI4182 are available now with the EMI2121 releasing in June.
Visit ON Semiconductor at www.onsemi.com.
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Internet of Things (IoT) manufacturer Ciseco has launched the Raspberry Pi ‘Wireless Inventors Kit’ (RasWIK), featuring 88 pieces to provide everything a Pi owner needs to follow a series of step-by-step projects or to create their own wireless devices, without the need for configuration or even writing code.
RasWIK has been designed to be highly accessible, demystifying the dark art of wireless and enabling anyone with basic computing skills to begin building wireless devices with a Raspberry Pi. You can create anything from a simple traffic light, to a battery monitor, or even a temperature gauge that sends data to the Xively IoT cloud so billions can access the data.This month, Ciseco is giving away twelve Raspberry Pi Wireless Inventors kits, worth £49.99 each for EETimes Europe's readers to win.
And the winners are...
In our previous reader offer, Farsens was giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags.
Lucky winners include Mr A. Neil from the UK, Mr. E. Delvaux from Belgium, Mr Lengal from the Czech Republic, Mr H. Bijlsma from the Netherlands, and Mr G. Pfaff from Germany. All should be receiving their packages soon. Lets wish them some interesting findings with their projects.
December 15, 2011 | Texas instruments | 222901974
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