Parallel-Port Filter Extends EMI Protection

Dec. 23, 2002
Rising clock frequencies and new sources of RF emissions such as WLAN 802.11 are pushing the demand for electromagnetic-interference (EMI) filtering on IEEE 1284 parallel ports. The PACZIG1284, an integrated filter from California Micro Devices,...

Rising clock frequencies and new sources of RF emissions such as WLAN 802.11 are pushing the demand for electromagnetic-interference (EMI) filtering on IEEE 1284 parallel ports. The PACZIG1284, an integrated filter from California Micro Devices, addresses these concerns by providing approximately 30 dB of EMI rejection out to 3 GHz. The part also attenuates frequencies down to 100 MHz.

The PACZIG1284 is comparable to the company's PACSZ1284, which attenuates signals up to 1.5 GHz. Both the PACSZ1284 and the PACZIG1284 integrate the termination resistors and electrostatic-discharge (ESD) protection needed for complete parallel-port protection. Yet the new filter component is constructed using a Zero Inductance Ground technology.

"ZIG" eliminates the wirebond that previously connected the ground on the filter's silicon substrate to the pc board. In the PACZIG1284, the substrate connects to the pc board through an exposed metal pad. According to the company, eliminating the wirebond lowers the inductance in the ground path from about 1 to 1.5 nH to a value that's not measurable.

Housed in a 28-pin QSOP, the PACZIG1284 costs $0.71 each in quantities of 10,000.

California Micro Devices, www.calmicro.com; Joe Salvador, (408) 934-3114.

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!