Product Overview

California Micro Devices' CM1418 and CM1419 Chip Scale devices now offer unprecedented inductor based EMI filtering for audio headset speaker applications. These devices offers low power loss due to their inductor-based designs, a feature of CMD's Praetorian® process technology, which facilitates the integration of spiral inductors and other discrete components on the same substrate. By using inductors rather than resistors to implement the filters, the CM1419 offers unprecedented attenuation levels and minimal insertion loss in a compact 1.59mm x 1.22mm chip scale footprint. In addition, the CM1419 provides high levels of ESD protection through its integrated ESD diodes on each channel. By integrating EMI filters and ESD protection on the same substrate, the CM1419 offers a complete, high performance solution for mobile audio applications.

Product Features

The CM1419 is an inductor-based EMI filter array with ESD protection which integrates two Pi filters (C-L-C). Component values are 117pF-3.0nH-117pF for each channel. A major benefit of this architecture is the equivalent series resistance (ESR) of 0.28Ohms typical. The part integrates ESD protection diodes on all input/output pins, which provide a very high level of protection for components that may be subjected to electrostatic discharge (ESD). The ESD diodes connected to the filter ports are designed and characterized to safely dissipate ESD strikes of ±30kV, beyond the maximum requirement of the IEC61000-4-2 international standard. Using the MIL-STD-883 (Method 3015) specification for Human Body Model (HBM) ESD, the pins are protected for contact discharges at greater than ±30kV.
The CM1419 features attenuation levels greater than -40dB in the critical 800 MHz to 2.1 GHz frequencies range. It is housed in an ultra compact and very cost effective 5-bump, 0.5mm pitch Chip Scale Package (CSP) of 1.590mm x 1.220mm.

CM1419 Filter Response Curve

The CM1419 features include:

2 channels of EMI filtering ±30kV ESD protection (IEC 61000-4-2, contact discharge) ±30kV ESD protection (HBM) OptiGuard™ coating available for improved reliability at assembly Greater than 40dB of attenuation in the 800MHz to 2.1GHz frequency range 5-bump, 1.590mm x 1.220mm footprint Chip Scale Package (CM1419) 6-bump, 1.720mm x 1.220mm footprint Chip Scale Package (CM1418) Lead free versions available

Product Applications

Ideal For Audio Applications
The CM1419 is particularly well suited for speaker applications in mobile handsets because it features an equivalent series resistance (ESR) of only 0.28Ohms typical, which needs to be as low as possible in order to minimize insertion loss, and therefore power loss, ultimately contributing to extended battery life. Combined with an extremely small footprint and unmatched attenuation levels, the CM1419 addresses all critical requirements from wireless handset designers: best electrical performance, most integrated and compact format, cost effectiveness and power savings.

Sampling, Pricing and Availability

Both the CM1419 and CM1418 are currently sampling, and pricing starts at $0.39 and $0.46 each in 1,000 units respectively. Production is scheduled for Q1 2006. Both products are offered in a lead free CSP package with CMD’s optional OptiGuard™ coating for increased robustness and durability.