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Use this drop-down menu to jump to all the product news stories from the Spring 2006 issue of Murata Mail. CapacitorsBetter Trimmer Capacitors
Our latest trimmer design has greater protection against flux invasion. The TZY2 series also offers better post-adjustment stability, excellent resistance to soldering heat, accommodation of a built-in parallel capacitor and size reduction. Only 1.25mm high, the footprint is 2.5 x 3.2mm. Nominal values range from 1.0 to 45pF and use high stability low-loss COG dielectric to give a self-resonant frequency of almost 5GHz. Unique construction with no plastic material improves soldering heat resistance and maintains excellent characteristic performance after reflow soldering. We recommend reflow or handsoldering, not immersing the trimmer in solder for the usual reasons.
Save money, time, space and labour
Not so long ago, Murata's 0805 chip capacitor was small and difficult to handle. True, it was rated at 50Vdc and 125 C, but most applications don't need those ratings today and today's machinery handles the smallest parts with precision. Now, our GNM214, the same size as the 0805 (2.0x1.25x0.95mm) is a four-capacitor array. That simple change reduces both mounting cycles and investment in machinery by 75%. At the same time, it reduces the volume of the four capacitors from a nominal 9.5cc to a mere 2.375cc, another dramatic reduction. Less machinery, less labour, less investment, less space; a win-win win-win choice. But the story gets better. Four capacitors in a row may not be convenient. So, we offer two capacitor arrays in the familiar 0805 GNM214 package, and in both the 0504 and 0302 packages (1.37x1.0x0.65 and 0.9x0.6x0.45). Obviously, the laws of physic impose limits on the values that can be achieved in a given package.
Coil & inductor technologyMiniature chip coils hold the solution to DC powercircuit noise
Tiny wire-wound chip coils (LQH32C) wi t h low DC resistance and high current capacity make cleaning up power supply circuits easier. This extensive family of ferrite core inductors benefits from exclusive winding techniques developed by Murata. Combined with special Murata materials, they provide plenty of options on a 3.2x2.5mm footprint 2.0mm high, with 1.55mm (nom) option for those with especially difficult height limits. Nominal inductance values range from 1.0µH to 560µH. There are rated currents up to a full 1.0 Amperes and DC resistances down to 0.06 ohm. The designs exhibit low voltage drop and little change in inductance with temperature. They all have excellent resistance to soldering heat and can be flow or reflow soldered. Packaging is in reels of 2,000 pieces and the size makes them easy to process automatically.
Tiny High Q 1GHz Wound Chip Inductors
Miniature Alumina cores, using a combination of unique materials and horizontal winding methods, are at the heart of our LQW04A series of inductors. Stable inductance values range from 1.1nH to 22nH in twentyfour steps, with minimumQof 15 or 20. Low DC resistance in all values ensures low loss, with maximum output in low power applications. The operating temperature range is a full -55 to 125 C, making them suitable for robust applications and a resin coating provides protection during processing and subsequent operation. The miniature package (0.8x0.4mm allows very high-density mounting and the 0.4mm profile height adds to that. In turn, this puts 10,000 pieces in 180mm diameter reels, reducing replenishment stops, labour time and storage space.
Dielectric TechnologyNew Business Domain: Power Mono
One of Murata's target business domains is the environment or even better environmental applications such as wind power generation and solar regeneration. The Clean Energy Recyclingprogram is clear; MLCC for Power Electronics...where our focus is f.i. invertors for wind powered generators but also invertors for automotive starters and generators. Murata's Power Mono (PWRMNO) offers low loss high dielectric constant capacitors with values up to 390F, voltage ratings up to 630Vdc and rated currents up to 30Arms. Naturally, the range will grow. These devices are Pb-free, compatible with Pb-free re-flow soldering and have excellent resistance to thermal cycling. In many cases Film cap and Aluminum cap are combined and from the DC-Link between battery and inverter. This solution becomes less effective as the customers' requirement gets tougher in ambient temperature, ESR and limited space. PWRMNO's requirement is expanding in this background. Our low loss dielectrics allow operation at the higher frequencies, temperatures and ripple current levels expected, in a way that film cannot.
EMI TechnologyHigh Current noise suppression
Optimal performance of products working in the 1.0MHz to 1.0GHz range can be achieved by using our BNX022 LC filters. They minimise EMI without significantly attenuating signals. New miniature designs reduce occupied PCB / substrate space and volume while optimising performance. Our filter has a profile height of only 3.3mm, yet gives high insertion loss over a wide frequency range with low DC resistance, protecting power lines in many products. It has a surface mount configuration with a mounted height of 3.3mm max. on a 9.3 by 12.3 base; rated at 10A at 85 C, operating from -40 C to 125 C, derating linearly to 1.0A at 125 C.
ResistorsAuto re-set Over-Current Protection
Our new thermistor offers internal resistance of only 0.20 ohm; allowing non-operating current flows up to 500mA at 60 C in an 0805 format (PRG210R2). The PRG18/21 family of PosistorsR (positive temperature coefficient thermistors) provides over-current protection across a broad range of operating and non-operating current levels. They exhibit a rapid increase in resistance at their operating currents, or if subjected to external over-heating. They also get progressively smaller, with the "knock-on" benefit of increasing sensitivity and reducing re-set times; helping to meet the universal demand for tiny products. Current ratings up to 25mA are in the 0603 format (PRG18), above that they are in an 0805 package (PRG21). More intermediate values can be expected to provide designers with extra options in the future.
ResonatorsLose Crystal Oscillators
Ceramic resonator stability has been getting progressively closer to that of crystal oscillators (XO). Our CSTCE-SK now replaces +/- 500ppm types. For some years now, the only advantage the XO had over the resonator was frequency stability. The XO is bigger, heavier and uses more power. We have been reducing that difference. The resonator has other advantages over the XO, the rise-time is about 100 times faster (please see fig.1) and a load capacitor is build in, reducing occupied space and machine cycles. Our range of frequencies with this stability is rising but 24MHz and 30MHz are in production now. These are ideal for the latest high speed USB applications. We recommend reflow soldering and optical positioning rather than mechanical. Packaging is in plastic tape with 3,000 pieces on 180mm reels or 9,000 on 330mm reels.
SensorsUse Non-contact Position Sensors to replace contact types and get a 10,000,000 cycle life
This new Hall Effect design (SV21) replaces contacts in position sensing technology. In doing so, it eliminates all the noise and wear problems that contacts bring. With 10,000,000 Cycles Rotational Life and up to 200 degrees rotational angle, the technology gives higher reliability, better performance and longer life. Greater flexibility is provided by programmable Hall Effect ICs that give a choice of four output characteristics; slope, offset, lower voltage limit and higher voltage limit. The 200 degree rotation compares well with the currently used typical range of about 90 degrees. In addition, the internal temperature compensation allows operation from -25 C to 85 C. Assembly could hardly be easier, being a simple socket and bush mounting. |
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