Author Archives: steve bush

140kV probe for bench work

Vitrek has introduced a 140kVdc 100kVac smart bench-top test probe. Called HVL-150, it is intended to expand the measurement range of the firm’s Model 4700 precision high-voltage meter. The probe has a proprietary low thermal coefficient attenuator that minimises the effects of self-heating (0.2ppm of reading per KV2), and low capacitance for ac measurement. Alone, ...

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Simple constant current LED drivers for automotive

Diodes has released simple LED driving chips for regulating current in strings of LEDs, particularly in cars and other road vehicles – some of which match parts from Infineon and Nexperia (see table below). Called the the BCR4xxUW6Q series, they come in SOT26 (SC70) packages and are expected to find use with LEDs displacing conventional bulbs ...

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16bit data acquisition over 48 channels at 125Msample/s

Spectrum Instrumentation has added twelve new products to its family of German-made LXI-based digitizerNETBOX data acquisition instruments. Designed specifically for situations where multiple signals need to be acquired, stored and analysed, users can select from models that provide 24, 32, 40 or 48 synchronised channels. Called the DN6.59x series, the digitisers are all based on ...

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pA diodes protect sensitive inputs

Intended for protecting op-amp, sample-and-hold and multiplexer inputs, Linear Systems has created a range of extremely low-leakage picoamp diodes (PADs) with reveres currents ranging from 1pA to 100pA, which are “pin-for-pin replacements for Siliconix-Vishay”, said Linear. They are available in: TO-92 two-lead (part name = JPAD, 35Vmax reverse) TO-72 (PAD, 45Vmax) SOT-23 (SSTPAD 30V) DFN eight-lead ...

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150Vin buck converter idles at 9µA

Analog Devices has introduced a 150V buck converter that draws 9µA quiescent – that is only 1.35mW wasted at full input voltage. Called LTC3894, its input range is 4.5 to 150V, and the the firm makes an interesting point: that this wide range can eliminate the need for external surge suppression devices on lower voltage rails. ...

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Printer for plasmonic structures works at room temperature

Printing nano-scale features in surfaces it difficult, according to Purdue University, particularly if the required features are smaller than the gains in the metal – the grains govern the ‘formability limit’. Sputtering metal into moulds is another route, so long at the resulting rough surface texture is not an issue. Now Purdue is claiming both ...

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Flow battery uses liquid sodium-potassium alloy

Researchers at Stanford University have proposed liquid sodium-potassium alloy as an electron donor in a flow battery. Instead of storing electrons within the structure of a battery, a flow battery stores electrons in the form of chemicals in tanks, which are pumped into an electrolytic cell when charge or discharge is required. The action decouples ...

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Low phase noise 55MHz-15GHz fractional-N synth

ADI’s ADF5610 fractional-N synthesiser covers 55MHz to 15GHz, and is claimed to have “industry’s lowest phase noise performance on a single chip” by its maker. Fabbed on a SiGe BiCMOS process, at 10GHz VCO phase noise is -114dBc/Hz at 100kHz offset and -165dBc/Hz at 100MHz offset. Normalized phase noise floor is -229dBc/Hz. Typical output power is  ...

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Screwless pluggable PCB mounting terminal blocks

The CamBlock Plus range of PCB mounted terminal blocks, from CamdenBoss, is a family of terminal blocks with UL and VDE safety approvals that span 2.54mm to 10.16mm pitch. New to this are two product lines: A 2.54mm pitch rising clamp terminal block with from 2 to 12 poles Screw-less pluggable types covering 2.5, 3.5, 3.81 ...

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