Supervisor IC has the right watchdog for automotives Product News 9/30/2004 Post a comment EM Microelectronic says its 615x/625x family of microprocessor supervisory ICs is especially suited to automotive applications. It features programmable voltage reset monitoring, special watchdog timer with programmable time window, system enable output, optional low-dropout (LDO) +5-volt regulator and a power saving function compatible with the CANbus sleep mode that, together, eliminate the need for redundant microprocessors to supervise each other. The family includes the V6150 and V6155 wind
Dual SPDT Analog Switch - ideal for portable applications Product News 9/29/2004 Post a comment Texas Instruments announced the TS5A23157 low-power dual single pole double throw (SPDT) analog switch. Designed for operation between 1.65V to 5.5V Vcc, the device provides low power consumption and high-speed, while maintaining excellent signal integrity, making it ideal for applications such as analog signal routing, signal gating, and digital signal multiplexing/demultiplexing.
Fuel gauge fields more I/O, all battery types Product News 9/29/2004 Post a comment Microchip Technology's PS501, an addition to the company's product line for battery management, expands on the company's earlier PS401, PS402, and PS700 versions with more functional I/O and the capability to work with all popular battery types. This battery manager/fuel gauge is accurate to 1 percent for two-, three- and four-cell lithium-ion/polymer sources, or six- to 12-cell nickel-metal-hydride and nickel-cadmium sources.
Mindspeed cuts guidance on lower China demand News & Analysis 9/28/2004 Post a comment Mindspeed Technologies Inc. (Newport Beach, Calif.) announced Tuesday (Sept. 28) it
anticipates fourth fiscal 2004 quarter revenues of
$26 million to $27 million, down 25 percent from fiscal
third-quarter revenue of $35.4 million and compared to previous guidance of flat to 10 percent higher sequential revenue.
Big Pay-off for Small Trade-Off Product News 9/28/2004 Post a comment A new family of high-speed analog-to-digital converters (A/D converters) from Linear Technology combines strong AC performance with low power, making them suited for a range of wireless and cable communications systems.
Supervisor ICs link up to 30 POLs Product News 9/28/2004 Post a comment Summit Microelectronics' SMM766 and SMM764 supervisor ICs, using single-pin control, can link up to 30 POL (point-of-load) DC/DC converters. The SMM766, a six-channel device, and the SMM764, a four-channel device, include sequencing, margining, and true differential tracking capability.
Siemens Automotive awards supply contract to Freescale News & Analysis 9/27/2004 Post a comment Siemens VDO Automotive (Auburn Hills, Mich.) has awarded Freescale Semiconductor (Austin) a $245 million contract to supply electronics components including ASICs, microcontrollers, analog and sensor components, for its automotive electrical and electronic systems.
Getting inside the SiP News & Analysis 9/27/2004 Post a comment Many design teams are taking a harder look at the system-in-package (SiP) alternative to conventional system-on-chip (SoC) design as the advantages of combining multiple dice into one package have been well-documented. The approach exploits the low cost and rigorous testing of commodity ICs like DRAMs. It also allows specialized circuitry to reside on its own dice, can integrate high-quality passive components into the package and can reduce design risk and shorten time to volume production comp
A/D conversion gets a digital assist News & Analysis 9/27/2004 Post a comment In the shift to digital processing of information, the performance of many electronic systems has become limited by the interfaces between physical analog signals and their digital representation. Aside from restrictions due to limited throughput, the growing trend toward portable and wearable devices has made the power efficiency of analog-to-digital converters one of the main factors that can limit overall system performance.
Analog design tuned to consumer News & Analysis 9/27/2004 Post a comment In the drive for lower cost, smaller size and reduced power consumption, the consumer electronics industry is at the forefront of deep-submicron CMOS process development. Increasing gate densities and higher clock speeds allow more signal processing to be done in the digital domain. But nearly all consumer product applications still require analog circuits to interface with the real world-for example, front-end A/Ds or back-end D/As.
On-chip VCOs can be digitally tuned News & Analysis 9/27/2004 Post a comment Synchronous systems, whether analog or digital, all use a clock reference signal, typically generated using a high-frequency phase-locked loop (PLL), where power consumption, frequency range and accuracy, noise level and jitter are critical system-level parameters. In these PLLs, one of the most challenging blocks to design properly is the voltage-controlled oscillator (VCO).
Deep-submicron CMOS aids RF design News & Analysis 9/27/2004 Post a comment While shrinking CMOS lithographies pose many difficult challenges for analog circuits, including shrinking supply voltages and increasing leakage currents, they also offer some fundamental advantages that analog and mixed-signal circuits can exploit with the right architecture and circuit approach. For example, deep-submicron CMOS transistors are achieving very high fTs that are being exploited in RF circuits, from cell phones to wireless LANs. With the RF circuitry realized in BiCMOS or CMOS, d
Digitally optimizing WLAN transceivers News & Analysis 9/27/2004 Post a comment The 802.11a and 802.11g wireless-LAN standards use orthogonal frequency-division multiplexing modulation to provide high data-throughput rates. Unfortunately, OFDM modulation also provides a signal that has very large peak-to-average power fluctuations in time. For traditional architectures, this requires a lowering of power efficiency by backing off the power amplifiers to reduce distortion that results from amplifier compression. Even for high-efficiency linear amplification using nonlinear co
Test Instruments Coupled with EDA software maximize Doherty Amplifier Linearity and Efficiency News & Analysis 9/27/2004 Post a comment Due to the increasing importance of spectral efficiency in mobile communications, linearity and efficiency of RF power amplifiers have become critical design issues for nonconstant-envelope digital modulation schemes. Although linearity can be improved with linearization techniques such as feed-forward linearization, the improvement comes at the expense of reduced efficiency. Baseband predistortion is a potentially more promising technique.
Digital circuits make analog array configurable News & Analysis 9/27/2004 Post a comment Implementing configurable I/O blocks on a microcontroller IC is by now an established practice. These blocks in the past have been implemented either as register-configured fixed logic or as an array of programmable logic cells. In a recent chip design, our team undertook to create a flexible, user-configurable portfolio of moderate-performance analog and mixed-signal functions on an MCU die. These functions were to exist in addition to, and work in concert with, a set of user-configurable digit
TDR helps isolate electronic package faults (Part 3) News & Analysis 9/26/2004 Post a comment Time Domain Reflectometry is increasing in importance as a non-destructive method for fault location in electronic packages. In this multipart series, TDA Systems' famous fault finder, Dima Smolyansky, shows some package faults like shorts and opens, and explains how they are likely to show up on TDR measurement screen. The first part offered a review of Time Domain Reflectometry basics. Part 2 began the process of assessing package faults such as shorts and opens. Part 3, concluding the series,
The Invisible Intruder News & Analysis 9/26/2004 Post a comment My caller last week was in a bind and he could not see what was causing the problem. But then, nobody can see RF, writes Bill Klein in the latest installment of his popular op amp trouble-shooting column ("A call I took last week.") The reported symptom was a shift and instability in offset voltage for no apparent reason. After several experiments we determined RF from nearby cell phones caused the problem. But how could this be? See what he found out.
Supervisor ICs tout maximum flexibility Product News 9/25/2004 Post a comment Providing all the basic supervisory functions for power systems on a single chip, Maxim Integrated Products' MAX6870 and MAX6871 are EEPROM-programmable, hex/quad power-supply supervisor ICs with an integrated 10-bit a/d converter (ADC). They combine voltage monitoring, margining control, and sequencing control. These devices are programmed through an I2C interface that selects monitored voltage thresholds, sequence and reset-timing specifications, and sets output configurations.
An analyst on Intersil: Very committed to the PC space Blog 9/24/2004 Post a comment A number of observers have wondered whether Intersil was losing its edge in the power management device market. International Rectifier, for example, reported design wins on Pentium motherboards and server cards - places where Intersil maintained hegemony. American Technology Research's Doug Freedman went to an analyst meeting Thursday (September 23rd), and reported "they seemed very committed to the PC space."
Digitalizing analog circuits cuts chip area News & Analysis 9/23/2004 Post a comment Since analog circuits refuse to obey Moore's Law, logic designers are taking matters into their own hands to take full advantage of CMOS process shrinks. By replacing analog functions with digital equivalents, you can achieve more predictable performance, simplify testing and reduce chip area even when the digital equivalents use far more transistors than the analog versions.
AC-DC Power Conversion IC - offers a modern switching solution Product News 9/23/2004 Post a comment Power Integrations Inc introduced the LNK302, a new member of the company's LinkSwitch-TN family of AC-DC power conversion ICs. Designed as a cost-effective replacement for bulky, energy-wasting capacitive droppers and linear transformers, the LinkSwitch-TN family is ideal for use in home appliance and industrial control applications.
Quad Delta-Sigma Modulator - for industrial motor control Product News 9/23/2004 Post a comment Extending its portfolio of high-performance motor control converters from the Burr-Brown product line, Texas Instruments announced the industry's first quad delta-sigma modulator, featuring 100dB dynamic range, 16-bit resolution and a single +5V supply. The four differential inputs enable direct connection to transducers or low-level signals for measuring and digitizing current in industrial environments, such as motor control and industrial process control.
Tiny gate drivers pack plenty of punch Product News 9/23/2004 Post a comment National Semiconductor's LM5111 and LM5112, in some of the industry's smallest packages, deliver up to 5 to 7 amps of gate drive for the power MOSFET stages in AC/DC and DC/DC converters, motor drives and industrial control systems.
Dual A/D converter consumes little power at high speeds Product News 9/21/2004 Post a comment National Semiconductor offers a dual high-performance CMOS analog-to-digital converter that the company says uses significantly less power than competitive products while providing the GHz speeds necessary for reliable measurements of high-frequency signals. Editor Bettyann Liotta takes you in for a closer look at this product and how it compares to other similar products in the industry.
Power Meter System-On-Chip - for industrial poly-phase meters Product News 9/21/2004 Post a comment TDK Semiconductor unveiled the world's first true system-on-chip for industrial poly-phase power meters. The 71M6513H integrates a 21 bit delta-sigma-delta converter, 32-bit compute engine, MCU, RTC, LCD driver, and ultra-precision voltage reference and provides better than 0.1% accuracy with only a few low cost external components.
1-GHz Voltage Feedback OpAmp - for high-performance systems Product News 9/21/2004 Post a comment Analog Devices has introduced an operational amplifier that combines an easy-to-use voltage-feedback architecture, unity-gain stability, and pin-out optimised for high-performance systems. This unique set of features, combined with 1-GHz speed, low noise, and low distortion, simplifies design and makes the AD8045 ideal for many high-speed applications including medical instrumentation, ATE, and data-acquisition systems.
Power-sensing circuit breaker protects portable computers Design How-To 9/21/2004 Post a comment Most circuit breakers sense current. Fuses, for example, protect a circuit by blocking the current when it exceeds a limit. Current-sensing circuit breakers work well for constant dc or RMS supply voltages, but for a variable supply voltage such as the battery in a notebook computer, power sensing is safer.
Online tools promote an understanding of the non-ideal non-inverting amplifier News & Analysis 9/21/2004 Post a comment The non-inverting amplifier configuration is one of the simplest, most basic applications of an op amp. In college circuits courses, students derive the transfer function of the ideal non-inverting amplifier from simple equations. An online circuit simulator makes it easy to come with a practical design. A National Semiconductor technology shows how.
TDR helps isolate electronic package faults (Part 2) News & Analysis 9/21/2004 Post a comment Time Domain Reflectometry is increasing in importance as a non-destructive method for fault location in electronic packages. In this multipart series, TDA Systems' famous fault finder, Dima Smolyansky, shows some package faults like shorts and opens, and explains how they are likely to show up on TDR measurement screen. The first part, published last week, offered a review of Time Domain Reflectometry basics. Part 2 here, also available in this week's Planet Analog magazine, begins the process o
Power Integrations lowers guidance as orders fall News & Analysis 9/20/2004 Post a comment Power Integrations Inc. (San Jose) said Monday (September 20) it expects revenue for the third quarter ending September to be 7 to 9 percent below second quarter revenue of $35.9 million, instead of a previous guidance of a 6 to 12 percent increase.
What's up with down converters Product News 9/20/2004 Post a comment Up/down converters fit nicely into the plans of many designers of communications products, says Editor Paul O'Shea. They offer filtering and tuning for multistandard signals, and even help reduce parts count by reducing the number of intermediate frequency stages. O'Shea tells you what the issues are and what manufacturers offer.
Clock Generator - six identical, buffered LVTTL outputs Product News 9/20/2004 Post a comment Maxim introduced the MAX9486, a cost-effective, high-performance clock generator with an 8kHz reference-clock input. It is the best timing solution for ADSL/VDSL central-office line cards, T1/E1, T3/E3, and telecom network systems. The circuit uses a 17.664MHz crystal and an 8kHz input reference clock to generate six identical, buffered LVTTL outputs at 35.328MHz, which are all synchronized with the 8kHz input clock.