RF/microwave products offer flexibility

In a time when automobiles comprise a burgeoning amount of electrical parts, and more electrical automobiles are rolling off the production lines, concerns related to signal and power integrity gain prominence. EMI from internal as well as external sources can interfere with the operation of sensitive circuits.

Most EMI incidents involve ambient EMI or power quality problems, whether they are due to emissions, RFI, ESD, power disturbances, or self compatibility. For design engineers, the stakes are significant. Failing compliance testing failure can lead to significant cost overruns and scheduling delays.

This product focus highlights devices connected to minimizing the generation and effects of EMI.

Flexible-resolution oscilloscopes

1810prodfocusfig206 300x250The PicoScope 5000D Series FlexRes oscilloscopes and MSOs feature up to 16 bits of vertical resolution with up to 200-MHz bandwidth and 1-GS/s sampling speed. FlexRes hardware employs multiple high-resolution ADCs at the input channels in different time-interleaved and parallel combinations to optimize either the sampling rate to 1 GS/s at 8 bits, the resolution to 16 bits at 62.5 MS/s, or other combinations in between. PicoScope 5000D MSO models add 16 digital channels, providing the ability to accurately time-correlate analog and digital channels. Digital channels may be grouped and displayed as a bus with each bus value displayed in binary, hex, decimal, or level (for DAC testing). Advanced triggers can be set across both the analog and digital channels. PicoScope 5000D Series oscilloscopes have waveform capture memory up to 512 MS. Deep memory enables the capture of long-duration waveforms at maximum sampling speed. Pico Technology

ESD-rated ceramic-capacitor portfolio

1810prodfocusfig207 300x200This vendor has announced an expanded ESD-rated ceramic capacitor series into a complete product portfolio. Automotive and commercial grades are now available in EIA 0402, 0603, 0805 and 1206 case sizes with voltage ratings of 16 to 250 VDC. These devices provide miniaturization and enhanced flexibility to optimize ESD suppression, RF filtering, blocking, sensing, and circuit protection. The product portfolio offers additional case sizes, voltage ranges, capacitance values and ESD ratings with more options for a wider variety of customer applications. Design engineers can choose either X7R or C0G dielectric for circuits requiring Class-II or Class-I stability and noise performance with the ability to design to given ESD criteria per the Human Body Model (HBM) AEC-Q200-002. ESD events may cause undesirable operation in a circuit and possible damage due to human contact, which is a major cause of electronic equipment failures during circuit assembly or in the field. These issues are estimated to reduce assembly-line productivity by up to 33%. ESD rated capacitors enhance circuit protection of integrated circuits, and smaller dimensions simplify designs while minimizing impact on overall form factor. Kemet

TDK offers multilayer chip beads with high rated currents

1810prodfocusfig208 300x200This vendor’s MPZ0603-H Series multilayer chip beads for power lines in an IEC 0603 package (EIA 0201) feature twice the rated current and about half the DC resistance of the existing MPZ0603-C Series. Because of a newly developed technology for the internal electrodes, the vendor says it was able to reduce the DC resistance to as low as 36 mΩ, thus increasing the rated current to as high as 1,900 mA. The MPZ0603-H Series offers high impedance values ranging from 22 Ω to 120 Ω at 100 MHz. The new chip beads measure in with a miniature footprint of 0.6 mm x 0.3 mm and a low insertion height of just 0.3 mm. With their compact dimensions and electrical specifications, the ferrite beads are suited for a wide spectrum of noise-suppression measures in the IC power-supply lines of smartphones, audio players, PCs, and other devices. As the multifunctionality of portable devices such as smartphones continues to grow, high current ratings are becoming an increasingly important factor for components in the IC power-supply lines. Thanks to their low DC resistance, the MPZ0603-H chip beads not only offer a high rated current, but they also help lower the power consumption of devices. TDK Corp.

Measurement for energy distribution

This provider of test equipment rentals now offers for rent the DOW3000 electronic measuring equipment for energy distribution networks. The DOW3000 is a configurable high-voltage test system that can be extended for slow and fast damped oscillatory waves, impulse voltage test, or any combination. The integrated 32-A three-phase coupling/decoupling network (CDN) has a ratingt of 690 VAC and 500 VDC and enables both slow and fast signals to be directly injected into the device under test. The DOW3000 meets test standards IEC 61000-4-18, IEC 61000-4-10, and ANSI C37.90.1. EMC Partner, available from Advanced Test Equipment Rentals

10-kHz to 1,000-MHz amplifiers

1810prodfocusfig210 300x161A family of RF solid-state Class A power amplifiers is suitable for EMC testing, laboratory testing, antenna and component testing, wattmeter calibration, medical/physics research, and more. Each of the “U” Universal Series instruments will instantaneously cover its full frequency range with a single-band amplifier. Models in the family covering 10 kHz to 1,000 MHz offer CW power levels of 1, 2.5, 5, 10, 25, and 50 W. A recently added 100-W model covers 100 kHz to 1,000 MHz. AR/RF Microwave Instrumentation

DC power supply

1810prodfocusfig211 300x133SGX Series programmable DC power supplies include onboard intelligent controls that enable sequencing, a constant power mode, and save/recall of instrument settings. In addition, a looping of sequences function makes the SGX suitable for repetitive testing. Users can quickly control the DC supply with the intuitive touchscreen. Function selection and parameter entry can be achieved either by direct selection from the touchscreen or by using the encoder selector button. The control resolution is adjusted by a dynamic rate change algorithm that combines the benefits of precise control over small parameter changes with quick sweeps through the entire range. The SGX product line complies with all EMI, EMC, and safety requirements as well as EU RoHS directives. AMETEK Programmable Power

Synchronous converters

The highly integrated 5-A and 6-A LM73605/6 and 2.5-A and 3.5-A LM76002/3 step-down voltage converters feature an optimized pinout and thermal coefficient to simplify the process of achieving EMI compliance and higher reliability for rugged industrial and automotive power supplies, the vendor reports. The 5-A and 6-A LM73605/6 and 2.5-A and 3.5-A LM76002/3 DC/DC step-down buck converters simplify the process of achieving EMI compliance and high reliability for rugged industrial and automotive applications. The 3.5-V to 36-V LM73605/6 and 3.5-V to 60-V LM76002/3 buck regulators meet and exceed CISPR 25 Class 5 automotive EMC requirements. These regulators’ programmable output switching frequencies can be set either above the AM band, which eliminates AM-band interference and reduces output filter size and cost, or below the AM band to optimize efficiency. The small QFN package with wettable flanks delivers a low thermal coefficient of 7.1°C/W to improve reliability and enables post-solder optical inspection to simplify manufacturing. Optimized package pin placement allows flexibility in board design to improve heat sinking, which minimizes radiated and conducted emissions. Texas Instruments

EMI/EMC compliance testing

1810prodfocusfig213 300x161The EMCVu is an all-in-one solution for EMI/EMC pretesting and troubleshooting. In today’s electronic design environment, about 50% of products fail EMC testing the first time. According to the vendor, EMCVu gives engineers an accurate, convenient, and cost-effective approach to determine if their product designs will pass EMC emission compliance testing on the first try. Precompliance testing reduces failure rates, but introduces its own challenges including difficult and expensive equipment setup, testing accuracy, painful debugging, and a lack of reporting tools. At the core of the new solution are the real-time USB spectrum analyzers, including the RSA306B, which offer the performance of traditional desktop instruments at a fraction of the cost. Powered through USB connection, the small size of the vendor’s real-time USB spectrum analyzers makes it easy to perform EMI/EMC testing outside the lab environment in relatively low-noise environments, such as basements or parking garages. The instruments are controlled by SignalVu-PC software running on a laptop or tablet. For this application, SignalVu-PC has been enhanced with optional EMCVu software to provide precompliance and troubleshooting capability in the same user interface. EMCVu offers an easy-to -learn wizard with built in support for standards, such as CISPR, and push-button accessory selection and setup. It also facilitates debugging with automated ambient noise capture, multifailure remeasurement, and harmonic markers for in-depth analysis. Users can save experiment results with notes and images into a configurable report in PDF or RTF formats. An all-in-one precompliance solution including an RSA306B USB spectrum analyzer, SignalVu-PC with the
EMCVu plugin, near-field probes, a LISN, radiated test antennas, tripod, and cabling is priced at $26,655 US. Tektronix 

Compact power entry modules

1810prodfocusfig214 300x300The new DD14 Series packs functionality into a new generation of compact power-entry modules, combining an IEC C14 appliance inlet with 2-pole switch and 2-pole fuseholder. EMC performance is further enhanced with a depth-saving 2-stage filter. Shielding is optimized by screwing the metal casing of the filter to the panel, using its horizontal or vertical flange. A snap-in filter version eliminates the flange, consuming even less panel space. The DD14 integrates the EMC filter directly in line with the power input. The 2-stage filter design suppresses interference voltages more effectively over a much broader frequency spectrum than single-stage filters, thereby having a positive effect on electromagnetic compatibility. Standard and low-leakage medical filter options are available for use in commercial or facilities ICT equipment. It is compatible with V-Lock retaining cordsets. The DD14 is rated for current levels up to 10 A / 250 VAC according to IEC and 8 A 125/250 VAC according to UL / CSA. It is ENEC and cURus approved. Pricing for the DD14 is about $25 each per 100 pieces. Schurter

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