Milpitas, Calif. California Micro Devices (CMD) offers its new generation Praetorian CM1452 EMI filter with electrostatic discharge (ESD) protection for wireless handsets in a 0.40-mm pitch chip-scale package (CSP), which saves up to 45 percent board space compared with 0.50-mm pitch CSP or plastic TDFN packages. It also eliminates the need for additional diodes for ESD protection.
Leveraging the company's proprietary Praetorian process technology that allows for the integration of spiral inductors on silicon for improved filter performance, ESD protection, a small form factor and lower cost when compared to competing resistor-capacitor (RC) and ceramic-based solutions, the CM1452 provides both EMI filtering and ESD protection for interfaces that connect the host processor to the camera and display modules in wireless handsets.
Each channel of the CM1452 consists of a 3 pole L-C filter with a minimum inductor value of 17 nH and nominal capacitor values of 15 pF. Insertion loss is lower than R-C filters, typically less than 1 dB. The device also features excellent filter performance with a typical corner frequency of 300 MHz, a rolloff of 20 dB/octave and attenuation greater than 30 dB between 800 MHz and 3 GHz. It also offers ESD protection up to ±15 kV contact discharge per IEC61000-4-2 Level 4 specification and ± 30 kV using the Human Body Model (HBM).
The lead-free CM1452 devices are housed in CSPs that measure 1.67 x 1.05 mm, 2.47 x 1.05 mm and 3.30 x 1.05 mm for the 4-, 6- and 8-channel versions, respectively.
The CM1452 is currently sampling, and pricing starts at $0.24, $0.33 and $0.42 in quantities of 1,000 for the 4-, 6- and 8-channel configurations, respectively. Production is scheduled for second quarter 2006.
California Micro Devices, 1-408-263-3214, www.calmicro.com