Euroquartz launches new oscillators for low cost EMI reduction

Frequency control specialist, Euroquartz has introduced a new range of low EMI oscillators that are a ‘drop-in’ replacement for standard clock oscillators. The new low EMI oscillator range offers a low-cost solution to expensive EMI problems. The oscillators are ideal for use in a wide range of applications and provide an ideal solution to EMI by approaching the problem at source – the system clock oscillator.

The low EMI oscillators, designated HM572 ‘N’ series, use spread spectrum (dithered) techniques to reduce EMI emissions from the oscillator by 8 to 15dB. In most electronic systems, the principal cause of EMI is the system clock so it makes sense to reduce this at source rather than relying on traditional methods of patching up systems with ferrite beads, ground planes, metal shielding and similar costly additions. Spread spectrum technology spreads the mode energy over a wider bandwidth and, as the low EMI oscillator spread spectrum technique operates in the kHz region, the process is transparent to the oscillator operating frequency.

The low EMI oscillators are housed in standard 7 x 5 x 1.4mm surface mount packages and are a direct ‘drop in’ replacement for standard oscillators, providing the shortest and lowest-cost route to solve EMI problems.

The available frequency range is from 8 to 128MHz and specifications include a choice of spread type and modulation depth. The modulation carrier frequency varies from 31.25kHz minimum to 62.5kHz maximum dependent upon operating frequency and the specification required.

Frequency stability is from ±25ppm to ±100ppm over both commercial (0 to 70°C) and industrial (-40 to +85°C) temperature ranges.

Euroquartz HM572N series oscillators are RoHS compliant and are ideal for a wide range of applications including printers and multi-function devices, digital copiers, PDAs, networking, LAN/WAN, routers, computer storage systems (CD-ROM, VCD, DVD, HDD), scanners, modems, projectors, embedded systems, musical instruments, automotive electronics, GPS car navigation systems, LCD PC monitors and LED TVs, ADSL, PCMCIA equipment, still digital cameras and medical devices.