Noise effects on temperature measurement accuracy in 'thermal diode' systems Design How-To 10/31/2005 Post a comment This is the last in a series of three articles on thermal diodes. The previous two articles of the series demonstrated how 'thermal diodes' are used to measure temperature and developed an understanding of the internal variables of 'thermal diodes' used in temperature measurement systems. This article addresses an external variable -- noise coupling. It discusses the effects of noise coupling on 'thermal diode' systems and methods to prevent it.
Regulator meets industrial needs Product News 10/28/2005 Post a comment Linear Technology Corp. unveiled a 100-mA industrial grade version of its LT3020 low dropout voltage regulator with guaranteed performance from -40°C to +125°C.
Temp sensor measures five locations Product News 10/27/2005 Post a comment Maxim Integrated Products Inc.'s precision five-channel temperature sensor is said to accurately measure its own temperature and the temperature of up to four external locations with 1°C temperature accuracy.
MagnaChip Semiconductor narrows loss News & Analysis 10/27/2005 Post a comment Korean semiconductor supplier MagnaChip Semiconductor posted a net loss of $13.2 million on sales of $243.1 million in the third quarter, compared to a loss of $33.5 million on sales of $236.0 million the previous quarter.
Display drivers light up the marquee Product News 10/27/2005 Post a comment Maxim Integrated Products' MAX6971/MAX6983 16-port, and 8-port
MAX6970/MAX6980/MAX6981 constant-current LED drivers are rated at 36 volts for commercial lighting applications, including traffic signs, point-of-order and variable message signs, and marquee displays. Extra protection features support fail-safe application requirements.
Dual-output LDO powers peripheral circuits Product News 10/26/2005 Post a comment Microsemi Corporation's LX8821 ultra-low dropout regulator (ULDO), which has two independently regulated outputs, can deliver 2.5 amps (ULDO) per channel for applications ranging from PC peripherals and instrumentation to battery charging circuits and power to ASIC, memory and input/output circuits.
Current-sense amps draw less power Product News 10/26/2005 Post a comment Semtech Corp. said this family of high-side current sense amplifiers with voltage flexibility and power saving features will allow mobile device designers to lower the system cost and power draw needed for battery sensing or data acquisition applications.
Energy metering ICs with web tools ease designs Product News 10/26/2005 Post a comment In a dual announcement, Microchip Technology has released its MCP3905 and MCP3906 stand-alone energy-measurement integrated circuit (ICs), and also launched its on-line Utility Meter Design Center to provide designers with the tools and resources they need to create accurate and low-cost utility meter solutions for a wide range of applications.
Analog switches crank out bandwidth Product News 10/25/2005 Post a comment Vishay Intertechnology, Inc.'s dual, single-pole, double throw and dual, single-pole, single throw analog switches are said to offer low on-resistance (2.5 Ohms) and high 3-dB bandwidth (up to 360 MHz) in a tiny package.
Tiger Gizmondo: Gaming upstart leans on analog Teardown 10/25/2005 Post a comment How do you compete against the big boys of the gaming world? You bring on your best, most innovative design, which includes a slew of analog content. Here's your chance to take a peek under the hood of the Tiger Gizmondo hand-held gaming product.
Dual mux-buffer boosts signal integrity Product News 10/24/2005 Post a comment National Semiconductor Corp.'s dual multiplexer/buffer with integrated equalizers, programmable pre-emphasis, and up to 4 Gbits/s of serial I/O performance, are said to provide the lowest jitter and longest cable reach in the industry.
Battery authentication improves battery security Design How-To 10/24/2005 Post a comment There is a huge market for counterfeiters to supply cheap replacement batteries and peripherals. Unfortunately, many of them don't have the safety and protection circuits required by the OEM. Here are a couple battery authentication design ideas to meet your customer needs for safety and price.
H.264 video encoding with Stretch's S5000 software-configurable processor Design How-To 10/24/2005 Post a comment From a technical perspective, the primary difference between H.264 and other MPEG standards is the use of multiple reference frames, wider search ranges, and smaller macro blocks for motion estimation, all of which ultimately translate to increased computational intensiveness. A Stretch engineer explains how the new S5000 software-configurable processor offers unusual scalability and flexibility.
Driver/boost regulator illuminates LED-LCD combo Product News 10/21/2005 Post a comment Linear Technology's LT3466-1, for single cell lithium-ion applications, contains a DC/DC converter for driving up to 10 white light emitting diodes (LEDs) and a separate converter for generating the bias voltages for thin-film-transistor liquid-crystal displays (TFT-LCDs) or driving an OLED display. Each channel has independent dimming and shutdown control.
Smallest stepper controller IC can mount on the motor Product News 10/21/2005 Post a comment AMI Semiconductor says its AMIS-30621 and -30622 stepper motor controller ICs for automotive applications are the industry's smallest. In a micro leadframe package, they are suited to remote and multiple axis positioning using a local interconnect network (LIN), or requiring serial connectivity, respectively.
ON Semi posts higher sales, earnings News & Analysis 10/20/2005 Post a comment Semiconductor supplier ON Semiconductor Corp. reported net earnings of $23.5 million, or 6 cents per share on sales of $313.6 million in the third quarter, up from $18.5 million, or 5 cents per share on sales of $302.8 million in the previous quarter.
Clock-phase aligner bursts forth Product News 10/20/2005 Post a comment Maxim Integrated Products Inc. said this is the industry's first burst-mode clock-phase aligner that acquires a signal in 13 bits enabling best-in-class broadband passive optical network and gigabit passive optical network optical line termination designs.
Cypress posts another loss News & Analysis 10/20/2005 Post a comment Semiconductor supplier Cypress Semiconductor Corp. reported a GAAP net loss of $5.9 million, or 4 cents per share on sales of $227.1 million in the third quarter, compared to earnings of $4.3 million, or 12 cents per share on sales of $219.6 million in the year-ago quarter.
Fuel gauge costs under $1 Product News 10/20/2005 Post a comment Designed for especially cost-sensitive applications, Dallas Semiconductor's DS2745 is a Li+ battery monitor with an I2C interface that costs under $1. Mounted on either the host side or the battery-pack side of the application to continuously monitor battery capacity, the DS2745 measures current, accumulated current, voltage, and temperature.
AnalogicTech introduces a high efficiency charge pump for white LED flash applications Product News 10/20/2005 Post a comment Advanced Analogic Technologies has introduced the AAT3175, a low noise, high frequency, current mode charge pump for white LED flash applications. It is the company’s first dedicated current mode fractional/doubler charge pump for camera flash applications, and is capable of driving up to three flash LEDs at 300mA total current with current sharing from a 2.7V to 5.5V source.
LDOs trumpet high PSRR Product News 10/18/2005 Post a comment Intersil Corp.'s new family of dual low dropout regulators are said to provide high power supply rejection ratio, low quiescent current, and good performance for noise-sensitive applications like imaging sensors for digital still cameras or cellular phone camera modules, MP3 players and portable medical and instrumentation devices.
Switcher IC simplifies cell-phone chargers Product News 10/17/2005 Post a comment Power Integrations Linkswitch-LP family, using very few external components, is designed to replace unregulated (linear) transformer-based battery chargers delivering up to three watts for cell phones, cordless phones, portable audio players, shavers, and other personal electronics.
Motor driver IC integrates Hall sensor Product News 10/17/2005 Post a comment Allegro MicroSystems' A1441 is the company's first full-bridge brushless DC (BLDC) motor driver IC that includes a Hall commutation element. For single-phase, low-voltage motors, the chip is complete and no external devices are required.
Creating uniform LED intensity in RGB billboard and video displays Design How-To 10/17/2005 Post a comment A stadium or advertising display integrates dozens of display panels and thousands of LEDs. Inside each array, LEDs (also referred to as pixels) will yield significant variations in brightness, such that the delta in lumens between the brightest and dimmest LED can regularly approach 15 to 20 percent, if not more. Two TI engineers explain how to improve brightness uniformity.
Quad SPSTs tout fast switching Product News 10/14/2005 Post a comment Following on the heels of its first high-performance analog switch announcement, Austriamicrosystems AG is expanding its offering to include quad-version single-pole, single-throw switches that similarly boast significant switching time improvement over competing devices.
PWM advances active-clamp converter designs Product News 10/13/2005 Post a comment National Semiconductor says its LM5026 pulse-width-modulation (PWM) controller is the industry's most advanced type for forward converter toplogies using an active-clamp/reset design. National says this 100-volt current-mode device, designed to simplify loop compensation and reduce total parts count, boosts overall efficiency compared to standard forward converters in AC/DC and DC/DC telecom and industrial supplies.
Self-learning switching DC-DC converters meet smart power Design How-To 10/13/2005 Post a comment If you design high-performance, state-of-the-art applications then you need smart power supplies that are adaptive, power efficient, and reliably accurate. Easy to say but how is it done? Here's another article from the Georgia Tech Power IC Design Lab that provides you with a self-learning DC-DC converter that meets the needs of smart power.
Fairchild Semiconductor posts loss News & Analysis 10/13/2005 Post a comment Semiconductor supplier Fairchild Semiconductor International Inc. posted a third quarter loss of $20.8 million, or 17 cents per share on sales of $345.5 million, compared with net earnings of $13.4 million, or 11 cents per share on sales of $409.7 million in the year-ago quarter.
Metering ICs turn power measurement up a notch Product News 10/12/2005 Post a comment The CS5461A and CS5463 high precision power meter ICs from Cirrus Logic are suited for next-generation applications. An upgrade to the company's CS5460A device, these pin-for-pin compatible devices add circuitry to measure apparent and reactive power, thus cutting the bill-of-materials and overall development time.
Clock buffers blow away competition? Product News 10/12/2005 Post a comment Cypress Semiconductor Corp. released zero-delay buffers (ZDBs) that are said to outperform all pin-compatible products for high-speed communications and consumer devices in terms of operating frequency and cycle-to-cycle jitter.