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USB DAQ Delivers Increase Accuracy

March 27, 2008 11:40 am | Comments

Providing a 4× increase in resolution over traditional 16-bit devices (equivalent to more than 5½ digits of resolution for DC measurements), the National Instruments USB-6281 and USB-6289 DAQ modules feature an 18-bit analog input and ADC with sampling rates up to 625 kS/s (500 kS/s when scanning). The devices deliver an accuracy of 980 µV at ±10 V and 28 µV at ±100 mV and come with NI-DAQmx driver software and LabVIEW SignalExpress LE, measurement workbench. With features including programmable range and offset, the USB-6281 offers 16 SE and 8 DI analog input channels, two analog output channels, and 24 DIO channels while the USB-6289 has 32 SE and 16 DI analog input channels, four analog output channels, and 48 DIO channels.

DC Motor Pre-driver Saves Power, Reduces Damage

March 27, 2008 11:31 am | Comments

Targeting office automation, telecommunications, consumer and industrial applications, the Allegro A4930 single-phase brushless DC motor pre-driver provides outputs that can drive N-Channel MOSFET H-Bridges with voltage ranges from 8V to 36V. Motor speed is regulated by either PWM or external analog voltage with programmable minimum speed and maximum motor current. Synchronous rectification is employed in the PWM off-cycle to reduce power dissipation, and startup current can be ramped up for reduced supply current surges and lock detection along with auto restart functions to reduce damage due to motor overheating.

Audio Processor Chip Integrates Bluetooth for Mobile Phone Applications

March 27, 2008 10:06 am | Comments

CSR’s MusiCore1 single-chip stereo audio processor with Bluetooth overcomes the limitations of a phone CPU in handling both audio and voice processing. It supports decoding of all mainstream music file formats including MP3, AAC, AAC+, WMA and SBC, and its DSP architecture reduces the power required to process audio files: 5.25 mW for an MP3 file, compared to

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Hall-Effect Sensors Let Users Adjust the Bandwidth

March 27, 2008 9:42 am | Comments

Allegro MicroSystems announced Hall-effect sensors that are fully programmable with low noise and a high bandwidth. The A1360/1/2 devices are suited for use in high frequency, current sensing applications due to the low noise (down to 8 mV (p-p)), flat temperature coefficient (0 percent/°C) and high bandwidth capability (typically 50 kHz). They come in a 1 mm thin, four-lead SIP (KT-package), which allows for

DSCs Integrate 16-bit Audio DAC

March 27, 2008 8:33 am | Microchip Technology Inc. | Comments

Targeting embedded applications requiring audio functionality, 28-pin and 44-pin dsPIC 16-bit DSCs incorporate a dual-channel, 100ksps, 16-bit audio DAC module as well as 16 kB RAM (2 Kbytes of dual-port RAM) with 64 kB and 128 kB flash optional in the dsPIC33 model. Features of the DSP-capable device include two analog comparators, selectable 10-bit or 12-bit ADC, and a

Adjustable TFT Accepts Wide Input

March 27, 2008 8:00 am | Comments

Offering fully adjustable outputs, the dual-channel LTC3524 BIAS and white-LED driver can generate up to 25mA at 6V for the AVDD channel, and up to 2mA at 20V and -20V for the respective VGH and VGL bias requirements with controlled power-up/power-down sequencing. Able to operate at up to 90 percent with voltages from 2.5V to 6V, the 4mm2 QFN-packaged synchronous rectification device can power up to 10 white LEDs (5 per channel) while offering a dimming ration of up to 200:1.

Partnership Creates Autofocus Liquid Lens System

March 27, 2008 5:30 am | Comments

Creating a driver and liquid-lens system to add auto-focus capability to compact handheld imagers such as cellular phone and PDA cameras, a partnership between Supertex and Varioptic combines the Arctic Series of liquid lenses with the HV895 family of inductorless liquid lens driver ICs. The RoHS-compliant driver/lens system does not have moving parts, and features include

Voltage Feedback Amplifier Boasts Low Quiescent Current

March 26, 2008 10:13 am | Comments

 portable instrumentation, active filters and analog to digital converter (ADC) buffers

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Antenna Switch Targets Wireless LAN Applications

March 26, 2008 9:49 am | Comments

Operating in the 2.4-2.5 GHz band with frequency capabilities of up to 3 GHz, the SKY13309-370 LF antenna switch targets Bluetooth systems and other applications, including analog and digital mobile television in emerging markets, wireless headsets, and receiver chain of phones. This pseudomorphic high electron mobility transistor (pHEMT) gallium arsenide (GaAs) integrated circuit (IC) switch has a positive low voltage control of 0/3V, low insertion loss of 0.5 dB at 2.5 GHz and isolation of 25 dB at 2.5 GHz.

Panel Meter Features Built-in Outputs with Dual Setpoint Capability

March 26, 2008 8:34 am | Comments

Red Lion Controls, Inc. announced the PAXLA panel meters featuring control capability by adding two Form C relays capable of switching up to 5A. The meter accepts DC current, DC voltage or process input signals, scaling them to a desired readout for a wide range of applications. It delivers a bright 5 digit, 0.56" high red LED display with programmable scaling and decimal points, and offers a newly designed universal power supply, accepting 50V AC to 250V AC or 21.6V DC to 250V DC

48-bit Digital Input Boards Offer I/O Flexibility

March 26, 2008 7:57 am | Comments

With software selectable input switching levels from 0 – 28 VDC (with 25 mV resolution) the DNx-DIO-448 high density digital input boards, DNA-DIO-448 and DNR-DIO-448 allow for I/O flexibility. A diagnostic input mode measures the analog voltage at each input, allowing quick and accurate detection of short and open circuits as well identifying marginal or failing drive circuitry. Compatible with United Electronic Industries’ popular “Cube” and RACKtangle I/O chassis, the board reads all 48 bits at sustained rates in excess of 1 kS/second.

Low-Profile CCFL Inverters Have a Wide Input Voltage

March 26, 2008 7:44 am | Endicott Research Group | Comments

Presenting a profile of less than 6 mm, the SFW Series of DC to AC inverters from Endicott Research Group Inc, have an input voltage range from 8V to 18V. Available in single and dual-lamp versions, the devices feature open lamp detection, onboard PWM dimming, and lamp current regulation. Additional features include direct display connection and a start voltage of 1800 Vrms.

Zener Diode Assemblies Shield Automotive Peripherals

March 26, 2008 6:06 am | Comments

Created to help protect consumer infortainment devices that require in-vehicle charging, a pair of 2.3A polymer-enhanced Zener diode assemblies from Tyco Electronics  include a resistively non-linear, polymer positive temperature coefficient (PPTC) layer that responds to either diode heating or overcurrent events. Features include a max input of 16VDC, a resistance of 0.04O, and a power dissipation of 0.7W.

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Snap-In, Panel Mount Pushbutton Switch Offers Bi-color Illumination

March 25, 2008 12:26 pm | Comments

Available in a choice of silver-plated or gold over nickel plated copper alloy, the DG Series snap-in, panel mount pushbutton switch offers design engineers bi-color illumination. The RoHS-compliant switch suits applications, such as audio/video equipment, consumer electronics, and test instruments. With a tested electrical life of 100,000 cycles with an electrical rating of 100 mA at 30V with silver contacts and 0.4V A max at 20V max with gold contacts, the device has a contact resistance is <50? initial and a dielectric strength of at least 750Vrms with an insulation resistance of over 100?.

PCI-express Bus Extender Allows Swapping of PCIe Boards without System Reboots

March 25, 2008 10:05 am | Comments

Furaxa Inc. announced its PCIeExt16HOT “Smart” PCI-express Live-insertion bus extender board which, when installed in any PCI-express ×16 motherboard socket, facilitates fast production testing and engineering debug of PCI-express boards of all data widths (×16, ×8, ×4, ×2 and ×1). Live insertion enables boards to be rapidly removed and exchanged without the need to power down or reboot the system.  Ability to selectively reduce supply voltages by 0 percent, 5 percent or 10 percent enables margin testing of boards.

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