164 results found, displaying items 21 - 40

The 1:2 MAX4885E variable gain amplifier (VGA) multiplexer from Maxim Integrated Products switches between two VGA ports while maintaining a 6-pF (typical) on-capacitance and 5-? (typical) on resistance for higher-bandwidth applications up to 1 GHz. According to the company, it is the only switch that offers a complete VGA solution for switching and translating R, G, B, DDC, and H/V signals.

At 9.6 mA per channel, the ADA4932 and ADA4950 differential analog-to-digital converter (ADC) drivers from Analog Devices offer the industry’s lowest power consumption and the best performance of any ADC drivers operating at 50 mW or less, according to the company.

The CVCO55CC-1581-1581 voltage-controlled oscillator (VCO) from Crystek Corp. operates at 1581 MHz with a control voltage range of 0.5 to 4.5 V. It features a typical phase noise of –120 dBc/Hz at a 10-kHz offset and has excellent linearity, according to the company. Also, its output power typically is +2.5 dBm.

Most microcontrollers are paired with discrete analog components—like ADCs, amplifiers, filters, DACs, and comparators—to achieve filtering, signal conditioning, and signal conversion in systems like those that require interfaces to analog sensors or the filtering of noisy signals. To help alleviate the design challenges often associated with discrete analog component implementation, companies are integrating more of these functions into a microcontroller or microcontroller-like device.

The iMEMS ADXL346 digital three-axis smart motion sensor from Analog Devices features resolution up to 13 bits and an embedded FIFO that enables significant power savings by managing host processor power, according to the company. Measuring 3 by 3 by 0.95 mm, it’s designed to measure tilt, shock, and acceleration in space-constrained portable devices.

The MAX9519 analog video amplifier from Maxim Integrated Products drives standard-definition (SD) video connections from any device to a TV. Targeting cell phones, cameras, and portable media players that require an output for video playback on a TV, it uses Maxim’s proprietary SmartSleep technology to drastically reduce power consumption in portable devices, according to the company.

What amplifiers are used to drive analog- to-digital converters (ADCs)? Possibilities include single-ended and differential inputs and outputs, plus voltage feedback (VFB) or current feedback (CFB) in the control loop. Specialized amplifiers may provide level shifting, interstage isolation, single-ended to differential conversion, differential to single-ended conversion, plus attenuation or gain. ...

The Analog Devices AD9739 and AD9789 use the company’s Mix-Mode super-Nyquist architecture to perform high-fidelity DDS for RF signals to 3.6 GHz. According to ADI, the combination of best-in-class bandwidth and dynamic range with a direct-to-RF core lets broadband and next-generation wireless-equipment designers use a single transmit-DAC architecture for multiple communications standards while eliminating an off-chip mixer and low-pass filter to reduce design complexity, cost, size, and power.

The rumors are true. National Semiconductor’s sweeping layoff plans include Bob Pease. But that doesn’t mean he’s leaving Electronic Design. He is one of the inaugural members of our Engineering Hall of Fame and the most popular columnist on our staff. We will continue to present his latest musings—whether they’re on the best way to get more power out of your next design, responding to questions from readers, or recalling his latest adventure in far-off lands.

The single-chip MAX3798 vertical-cavity surface-emitting laser (VCSEL) driver and limiting-amplifier solution from Maxim Integrated Products targets SFP+ Fibre Channel and Ethernet applications, simplifying transceiver bills of materials for module manufacturers. Fabricated using Maxim’s MBiC3 IC technology, it delvers greater than 10-Gbit/s performance and a wide range of receiver- and transmitter-programmable features, while consuming just 320 mW, according to the company.

The A2 series of small, lightweight relays from CIT Relay & Switch offers both PCB pin and .250 quick-connect terminals. These devices also include a weatherproof shroud along with mounting flange and metal bracket options. Coil voltage options include 6, 12, and 24 V dc with coil power choices of 1.6 and 1.9 W.

Analog Devices has released a family of five single-channel RF mixers for high-dynamic-range applications within satellite communications, wireless basestations, point-to-point radio links, instrumentation, and military equipment. The ADL5801 active mixer covers 10 to 6000 MHz for the widest available operating frequency, while the ADL5355, ADL5357, ADL5365, an ADL5367 passive mixers are specified for operation across the cellular frequency ranges.

Mixed-signal design isn’t new. But as designs continue to get larger and more complex, with ever increasing amounts of digital and analog content, design implementation is getting more challenging. Traditional physical implementation methodologies are failing to provide efficient solutions for these advanced mixed-signal products, prompting new requirements that will be necessary for future generations of designs.

There’s a lot of talk in engineering publications these days about decimation filters, which are easy to construct when understood. This article will attempt explain their operation and show the steps needed to construct one. Let’s start with a straightforward filter that sums 16 values together.

The Texas Instruments ADS54RF63 provides more than 200 MHz of signal bandwidth in applications where high resolution, accuracy, and linearity are critical. This pipeline ADC also offers the highest SFDR and SNR available for IF above 500 MHz, according to the company.

The AD9551 clock generator from Analog Devices simplifies clock design and reduces the need for oscillators in multistandard networking and infrastructure systems, according to the company. Its simplified architecture can generate and translate multiple precision network clock frequencies. This enables the replacement of as many as five oscillators, which support functions that are essential in network switches, routers, and line cards.

For use in drive control, power electronics, power generation, wind power and photovoltaic installation as well as instrumentation and control, SMP supplies chokes and filters for frequencies up to 200 kHz and current ratings up to 1 kA. Depending on their application, the inductive components are constructed either as single-conductor chokes for high-current applications, individual chokes, choke modules, or LC filters.

The ADAS1128 current-to-digital converter chip from Analog Devices enables high-slice-count computerized tomography (CT) systems to capture real-time moving images, such as a beating heart, with a high degree of accuracy and detail. This 24-bit device also changes photodiode-array signals into digital signals.

A variant of the sigma-delta architecture, called the continuous-time sigma delta, has found homes in embedded applications such as mobile handsets for some time. Due to the high performance, efficiency, and ease of use of the CT-?? architecture, manufacturers of high-performance analog-to-digital converters (ADCs) are now bringing this converter architecture to market as a standard product.

Whenever I mention to folks that I used to work at Heathkit, a few people actually ask, “What’s Heathkit?” Yes, I suppose that does date me a bit. Others will say, “Oh, yes, my dad used to build Heathkits.” Anyway, some of you do remember Heathkit, and fondly in most cases. And believe it or not, it's still around.

• Whatever Happened To Heathkit?
• Precision DC motor speed controller
• Hot Hands For Some Cool Rock: Motion Sensing Meets Audio Engineering
• Voltage-To-Current Converter Works From A Single-Supply Rail
• Control circuit keeps dc motor running at constant speed