Alpha & Omega Introduces Integrated EMI Filters For Next Generation Cellular Handheld Devices

Alpha & Omega Semiconductor, Inc. (AOS), announced new multi-line EMI Filters designed and optimized to suppress unwanted EMI/RFI signals and provide ESD protection for the next generation cellular handheld devices. The AOZ8011 and AOZ8014 leverage the company’s proprietary (TVS)2™ technology. The (TVS)2 ™ process utilizes a Trench Vertical Structure to optimize Transient Voltage Suppression and EMI filtering of high speed data lines.

"These new multi-line EMI filters with integrated ESD protection offer advanced and optimized filter attenuation performance from 800Mhz to 3.0GHz over the full display operating range, improving overall device reliability and user experience," said Wayne Eng, Director of Product Marketing at AOS. "This introduction exemplifies how AOS continues to expand its device protection solutions with leadership products."

"The handset market for smart and feature phones are growing from 76% of the total market in 2006 to 1.14 billion or 85% of the market in 2010," said Shyam Nagrani, Principal Analyst at iSuppli Corp. "As higher resolution displays, more capable cameras, more A/V features and more I/O get integrated in to the handset, the need for better EMI filtering and ESD protection becomes more important. AOS’s new integrated EMI filter solutions address this huge, growing market need."

The AOZ8011 and AOZ8014 protect 8 and 4 lines, respectively, providing suppression of unwanted EMI/RFI signals and ESD protection of data lines in LCD displays, camera and I/O interfaces in handheld devices such as cell phones and PDA smartphones. The filter performance is rated at -25dB attenuation from 800MHz to 3.0GHZ over the full display operating range and features industry-leading clamping voltage performance. The device’s low channel clamping voltage of 8.5V maximum at 12A peak pulse is claimed to provide superior protection to sensitive IC components. Both devices are rated to provide ESD protection of +/-17kV for contact and +/-17kV for air discharge.

The AOZ8011 comes in a small footprint 1.6 x 4.0mm DFN package and AOZ8014 in a 2 x 2 mm DFN package. These small packages are suitable for portable handheld applications where board space is limited.

The two new EMI filters are available immediately in production quantities. Pricing for AOZ8011DI and AOZ8014DI starts at $0.21 and $0.14 for 1,000 units, respectively.