Murata’s DLP series of chip common mode choke coils is designed for use in Serial Advanced Technology Attachment-based (SATA) high-speed differential interfaces that are commonly used for high-speed mass storage hard disk drives found in computers, video recording equipment and solid state drives.
Until recently, noise in the SATA signal frequency band was excluded from corresponding EMI standards. However, new measures became necessary in 2010 with the establishment of the International Special Committee on Radio Interference CISPR 22 standard that sets the noise regulation frequency upper limit to 6 GHz.
Although a noise suppression measure using common mode choke coils was needed, no products were available that could comply with the common mode reflection coefficient (Scc11) requirement as defined by the SATA Gen 2 specification.
The DLP series uses micro-fabrication technology and noise evaluation technology used in SATA applications to build an optimal coil, to produce the first common mode choke coil in the world that is compatible with Scc11 in SATA Gen 2.
Being compatible with both SATA Gen 2 and SATA Gen 3 means that it can also be used in interfaces that use both standards concurrently, and that it can achieve both high signal transmission in signal frequency bands and strong common mode noise suppression.
The DLP series comprises two models: the DLP0NSA070HL2 is supplied in a 0806 package measuring 0,85 x 0,65 x 0,45 mm, and the DLP0QSA070HL2 in a 0605 format measuring 0,65 x 0,50 x 0,30 mm.
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