Circuit Components I Product News
Tight stability clock oscillator from IQD offers two different package sizes
IQD has developed a new range of clock oscillators, which are at the forefront of modern clock oscillator design, that can deliver frequency stabilities as low as ±10ppm over the full industrial temperature range of -40 to 85 degrees C. Two versions are available offering different ceramic package sizes; the IQXO-445 series is housed in a 2.5 x 2.0mm package while the IQXO-430 series is housed in a 3.2 x 2.5mm package.
Both series are available over a frequency
range from 4 to 54MHz and offer extremely low current consumption of 3.1mA at 40MHz coupled with a phase noise performance of - 145dBc/Hz at 10kHz offset. IQXO-445 and IQXO-430 series come available with 4 or 6 pads and can be specified in supply voltages of 2.5, 3.0 or 3.3V.
Output is CMOS compatible with up to 15pF load and both models include tri-state capability as standard and are intended for RoHS compliant reflow soldering.
The IQXO-445 and IQXO-430 series are both designed for a wide variety of applications such as wireless-LANS, PLC modems, Bluetooth, mobile communications, wi-max and industrial radio’s.
IQD |
www.iqdfrequencyproducts.com
New 1000-2000 MHz VCO from Crystek Corporation
Crystek's new CVCO55BE-1000-2000 VCO (Voltage Controlled Oscillator) operates from 1000 MHz to 2000 MHz with a control voltage range of 1.0V~20V. This VCO features a typical phase noise of -95 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +5.5 dBm. Engineered and manufactured in the USA, the model CVCO55BE-1000-2000 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 10V, with a maximum current consumption of 25 mA. Pulling and Pushing are minimised to 7.5 MHz and 2.5 MHz/V, respectively. Second harmonic suppression is -10 dBc typical.
The CVCO55BE-1000-2000 is suitable for use in applications such as digital radio equipment,
fixed wireless access, satellite communications systems, and base stations.
Crystek Corporation |
www.crystek.com
AVX announces broad offering of stacked SMPS MLCCs rated to 200°C
NTC chip brings accurate temperature measurement to robotic assemblies and military telecom systems
Ametherm has introduced four new series of NTC chip thermistors for high-accuracy temperature measurement. Recently acquired from RTI Electronics Inc., the STC0134-X, STC0138-X, STC0143, and STC0144-X series devices are available in a variety of compact sizes, while providing fast response times and high- temperature operation to +150 °C.
The NTC chip thermistors have been designed to deliver highly repeatable performance for temperature monitoring and compensation in hybrid circuits for ICs in robotic assemblies and military telecom systems. For increased reliability, the devices' electrode surface is available in gold to prevent oxidation. Providing a high-stability replacement for leaded small-disc thermistors, STC0134-X, STC0138-X, STC0143, and STC0144-X series devices experience minimal drift from their initial electrical values. Available in sizes as small as 0.50 mm by 0.50 mm by 0.43 mm, the components feature resistance at 25 °C from
100 Ω to 5000 Ω, tolerance down to ± 5%, and beta from 3,000 K to 3,523 K. The thermistors are suitable for solder reflow assembly or gluing with epoxy.
Samples and production quantities of the NTC chip thermistors are available now, with lead times of six to eight weeks.
Ametherm |
www.ametherm.com
AVX Corporation has extended its high temperature SMX Series stacked SMPS MLCCs with the addition of new 25V ratings in case sizes 3-5 and 500V ratings in every case size (1- 6). According to the company this makes it the broadest offering of stacked SMPS MLCCs rated to 200°C currently available in the industry. Providing several significant advantages over both typical MIL-qualified MLCCs (which are only rated to 125°C) and comparable wet tantalum capacitors, SMX Series MLCCs exhibit excellent high frequency performance, exceptional capacitance retention with frequency, high current handling capabilities, a wide frequency response in high pulse, high current applications, and low ESR, ESL, and DC leakage. Specifically designed for use in high temperature, harsh environment applications up to 200°C, SMX Series stacked SMPS MLCCs are constructed using high temperature solder and exhibit rugged thermal shock, mechanical shock, moisture resistance, and vibration resistance capabilities per MIL-STD-202. SMX Series capacitors are ideal for use in down-hole oil, gas, and mineral exploration equipment, including geophysical and geothermal probes, seismic sensors, and signal amplifiers. The series is suitable for use in military, defence, and weapons systems; space and satellite communications equipment; automotive underhood and hybrid electric vehicle (HEV) applications; and rugged AC/DC power converters (e.g., those that supply AC power from onshore power grids to offshore oil platforms).
Latest series of precision thin film chip resistor arrays features gold terminations for conductive gluing
Vishay Intertechnology has introduced a new series of precision thin film chip resistor arrays featuring gold terminations for conductive gluing. Offering two integrated resistors on one substrate, the ACAS 0606 ATAU resistor array combines high-temperature operation to 155 °C with relative tolerance down to ±0.05 % and relative TCR down to ±5 ppm/K. ACAS 0606 ATAU resistor arrays are intended to enable significantly more accurate performance than two high-precision discrete resistors, and their small 1.5 mm by 1.6 mm package enables the design of high-density circuits. The devices offer two equal or different resistance values from 100 Ω to 150 kΩ, with a maximum resistance ratio of 1:20. In addition to excellent high-temperature performance, the ACAS 0606 ATAU series is extremely robust against harsh environmental
40 September 2014
conditions and provides superior moisture resistivity. The device offers 1000 V ESD capability, a 75 V operating voltage, and maximum rated dissipation to 0.125 W per element. For automotive applications, the resistors are qualified according to AEC-Q200. The new resistor arrays are suited for precision analogue circuits, voltage dividers, feedback circuits, and signal conditioning applications that require extraordinarily stable fixed resistor ratios. Typical application fields will include automotive electronics, including engine control units, gear box controls, safety, power supply electronics, body electronics, braking systems, and lighting; and industrial electronics, such as energy management, measurement, and control technology.
Vishay Intertechnology |
www.vishay.com Components in Electronics
In addition, SMX Series capacitors are particularly well suited for use as DC filters in high power, high frequency ripple currents, high pulsed-current circuitry, and a range of low power electronics; EMI filters on AC inputs; DC link capacitors for AC/AC and DC/AC motor
drive inverters; and start-and-run capacitors in AC induction motors, including those designed into the rotary drills, mud pumps, draw works, conveyors, compressors, and blowers installed on oil platforms. Available in both C0G and X7R dielectrics, SMX Series stacked SMPS capacitors are available in six case sizes with voltage ratings spanning 25V to 500V and capacitance values spanning 0.0039µF to 270µF. Operating temperatures for the series range from -55°C to 200°C. SMX Series capacitors are also available with several customization options, including: custom geometries, packages, terminals, lead configurations, and stress relief mounting options, all of which allow engineers to achieve higher efficiency, space-saving designs with enhanced mechanical and thermal reliability. Further, performance characteristics for the series, including: temperature vs. applied current, ESR and impedance vs. frequency, maximum current vs. frequency, maximum ripple voltage vs. frequency, and phase angle vs. frequency, can be modelled using AVX's SpiCalci 8.0 modelling software, which is freely available.
AVX |
www.avx.com New thick-film resistors from ARCOL
The ARC series of versatile, high-quality, non- inductive, high voltage, thick film resistors available from UK based ARCOL Resistors are suitable for a wide range of applications including; high voltage medical systems, test and measuring equipment, HV power supplies, high specification instrumentation, voltage dividers, measuring equipment, electrostatic and current limiting devices. Three versions are available with the ARC1 type being a space saving planar design offering users a choice of axial or radial assembly and either conformal or glass coatings. The ARC1 series have resistors with voltage handling capability of up to 35kVdc and has an operating temperature range of -55°C to +175°C. The ARC2 and ARC3 are radial designs with operating temperatures from -55°C to +225°C.
The ARC2 has a maximum operating voltage of 54 kVdc, while the ARC3 reaches 96 kVdc. The ARC1 has an ohmic value range from
1KΩ to 30GΩ and a maximum power of 10W, the ARC2 offers ohmic values from 400RΩ to 30GΩ at up to 17W and the ARC3 has values from 2RΩ to 25GΩ and a maximum available commercial wattage of 105W these values are available across a variety of TCR and tolerance options. Like all ARCOL products the ARC series of resistors are RoHS compliant. Typical applications include traction, snubbers, switched mode power supplies and non- inductive resistors for high frequency and pulse applications.
ARCOL |
www.arcolresistors.com www.cieonline.co.uk
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