High resolution, high performance converters and radio frequency (RF) systems require good power supply noise filtering and high frequency crosstalk reduction between analog and digital domains. An effective method for filtering high frequency power supply noise and cleanly sharing similar supply rails is the use of ferrite beads. A ferrite bead is a passive device that filters high frequency noise energy over a broad frequency range, where it then becomes resistive and dissipates noise energy in the form of heat. This application note presents and discusses Analog Devices’ products that demonstrate the effects of ferrite beads as output filters.
Parameters that must be considered for RF inductor selection include mounting type, inductance value, current rating, DC resistance, self-resonant frequency, Q factor, and temperature rating. One must balance the desired smaller sizes of the inductor package, and the inductance value and current rating.
CUI’s Thermal Management Group recently announced an expansion to its existing portfolio of Peltier devices and dc fans with the addition of a heat sink product line.
Knowles brand DLI is one of the world’s oldest and most respected names in single layer, ceramic capacitor technology.