Avago Technologies has released a silicon bipolar Darlington amplifier in a low thermal-resistant SOT-89 package for use up to 2.5 GHz. The ADA-4789's unconditional stability and broad bandwidth performance make it suitable for IF amplifier and pre-driver amplifier applications in cellular base stations, as well as IF amplifiers in direct broadcast satellite and cable TV infrastructures.
The latest addition to its family of silicon bipolar Darlington amplifiers, it offers a power budget of 3.8 V/60 mA and delivers 32.6 dBm of OIP3 (linearity), 17.1 dBm of output power, 16.5 dB of gain and 4.2 dB of noise figure at 900 MHz. At 2 GHz, ADA-4789 provides 28.8 dBm of OIP3, 16.2 dBm of output power and 4.4 dB of noise figure. For a higher power budget of 4.1 V/80 mA, the ADA-4789 can boost the performance to 33.2 dBm of OIP3, 18.8 dBm of output power, 16.9 dB of gain and 4.2 dB of noise figure at 900 MHz.
Pricing begins at $0.59 each in 45,000-piece quantities.
Gen 2 RFID tag chips
Responding to demand for RFID tags that can store detailed product information for specialized applications, semiconductor and RFID technology provider Impinj Inc. has announced two enhanced functionality RFID chips: Monza/ID chips with secure factory-programmed product identification numbers and Monaco/64, the first in a line of chips with user-programmable memory.
Monza/ID chips are pre-programmed with unique identification numbers and protected against erasure and overwriting. Monaco/64 chips provide 64 bits of user-rewritable memory and extend Gen 2 RFID tag data storage capabilities beyond the standard electronic product code (EPC) to include additional user-defined information. Monaco/64 chip memory can be programmed and read repeatedly to keep data timely and accurate or data can be locked to prevent subsequent alteration.
Part of Impinj's GrandPrix Gen 2 solution, Monza/ID and Monaco/64 chips are based on the company's semiconductor technology and have the same footprint and performance characteristics as the company's Monza Gen 2 RFID chips that support basic EPC tracking. Monza/ID and Monaco/64 chips also use the same antenna designs as Monza, allowing RFID tag manufacturers to easily incorporate the new chips into their tag products.
Production quantities of Monza/ID and Monaco/64 chips are available. Other chips in the Monaco product line are under development and will be released later this year.
GaAs MMIC PA with output power adjust
Mimix Broadband's XP1018 is a gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC), four-stage power amplifier with output power adjust. Using 0.15 µm gate length, GaAs pseudomorphic high electron mobility transistor (pHEMT) device model technology, the power amplifier covers the 35 GHz to 45 GHz frequency bands and has a small signal gain of 23 dB with +25 dBm P1dB compression point.
Mimix performs 100% on-wafer RF, dc and output power testing on the XP1018, as well as 100% visual inspection to MIL-STD-883 method 2010. The chips also have surface passivation to protect and provide rugged parts with backside via holes and gold metallization to allow either a conductive epoxy or eutectic solder die attach process.
This power amplifier is suited for wireless communications applications such as millimeter-wave point-to-point radio, local multipoint distribution services (LMDS), satcom and VSAT applications. Samples are available along with production quantities.
Flange-mount drop-in isolator
Renaissance Electronic's L-series features up to 15% bandwidth in the 8.0 GHz to 40.0 GHz range. These products are useful for military and space applications and are made of steel housing that is gold-plated for better RF performance. This temperature-stable device has a typical loss of <0.4 dB and VSWR and isolation >20 dB. The device is sized at 0.25 in. × 0.50 in. × 0.18 in.
Mini-Circuits' new N-Type UNAT fixed attenuators offer 13 different attenuation values ranging from 1 dB to 20 dB, excellent return loss, and flat attenuation over the broad dc-6000 MHz frequency band. This low-cost family of UNAT fixed attenuators offer unique unibody construction, thereby enduring rigorous applications and wide temperature extremes ranging from -40 °C to +100 °C. Patent is pending.
Pricing starts from $15.95 each in quantities of 10.
Software evaluation kit
A simulation kit from xG Technology is available for companies to evaluate the performance of xG Technology's approach to wireless broadband. Called the xG system simulation blockset, the kit provides users with the ability to test xG flash signaling, the foundation for a class of communication systems, which includes xMax, a mobile VoIP product.
The company's first commercial offering, xMax delivers true mobile VoIP. By using unlicensed spectrum, xMax eliminates the need for multimillion-dollar licensed airwaves and, on average, delivers three times the range of other wireless technologies with comparable power and antenna height. xG system simulation blockset uses the same technology used in xMax and gives engineers insight into how the technology benefits their projects. Offering a reality-based simulation with real-world variables, the kit implements all the mandatory features of xMax in the unlicensed ISM-900 MHz and allows users to integrate xG with various channel scenarios in the MATLAB environment.
xG System Simulation Blockset is used with MATLAB and SIMULINK to evaluate the performance of a complete xG system. Features include an xG Index N Lite encoder; a narrowband carrierless xG transmitter; supported data rates from 1 Mb per second to 17 Mb per second; adjustable power settings; xG proprietary wave damping; and a xG demodulator and decoder.
Laird Technologies has released its Ultrasphere CAF 94895, a microminiature, low-profile, in-building wireless antenna that provides as high as 3.6 dBi gain and operates over the wideband frequency range of 800 MHz to 2.4 GHz, enabling six technologies (AMPS, GSM, PCS, DCS, UMTS and Wi-Fi) to radiate through a single antenna device.
The multiband, omnidirectional wireless antenna is targeted at cellular voice and data service providers, system integrators, VARs and OEMs. Due to its wideband coverage, the Ultrasphere is service provider and region-independent, which enhances its flexibility. The Ultrasphere CAF 94895 measures 1.7 mm maximum thickness. The product is suited for ceiling applications and is unobtrusive, which allows it to be concealed almost anywhere.
Depending on frequency range, the antenna has a peak gain range up to 3.6 dBi, and is 179 mm × 80 mm × 1.7 mm with a SMA female connector. Samples are available with MSRP of $34.95 for 500 pieces.
GaAs digital step attenuators
Skyworks has introduced a family of general-purpose gallium arsenide (GaAs) attenuators for linear applications including UMTS, WCDMA, WiMAX and WLAN. These GaAs digital single-positive-control step attenuators are also designed for base station transmitter and receivers and can be used in RFID transceivers. Targeted at OEMs building any type of receiver or modem, these attenuators are built in packages of 3 mm × 3 mm. The bilateral RF ports allow input and output. In addition, an external control voltage of only 2.7 V to 5.5 V is required.
SKY12322 with 5 bits and 0.5 dB LSB provides up to 15.5 dB of attenuation. SKY12323 with 5 bits and 1 dB LSB provides up to 31 dB of attenuation. SKY12325 with 3 bits and 1dB LSB provides up to 7 dB of attenuation.
These products are available for sampling, and in units of 10,000 are priced as follows: the SKY12322, which operates from 500 MHz to 4 GHz is priced at $2.10; the SKY12323, which operates from 500 MHz to 3 GHz at $2.10; and the SKY12325, which operates from 500 MHz to 6 GHz at $1.70
Sensing and Security
The TDC-GPX chip, developed by Acam-Messelectronic and available in North America through Transducers Direct, has a resolution as low as 10 ps and a measurement range up to 40 µs.
Operating in M mode, the GPX's 10 picosecond resolution translates to a measurement accuracy of ±1 mm rms to a range of 1500 m, with peak-to-peak variation of 70 ps (±5 mm). A peak pulse rate of 182 MHz makes the GPX chip suitable for 3-D laser scanners where a high sampling rate and excellent single-shot resolution are required.
Four selectable operating modes make the GPX suitable for a range of applications. In I-mode, the GPX provides eight LVTTL input channels, a resolution of 81 ps, infinite measurement range, and 5.5 ns pulse-pair resolution. G, R and M modes all provide two LVTTL or two LVPECL input channels. In G-mode, the resolution is 40 ps, the measurement range is 65 µs, and the minimum pulse-width measurement is 1.5 ns. In R mode, the resolution is 27 ps, the measurement range is 40 µs, and the pulse-pair resolution is 5.5 ns. In M mode, the resolution is 10 ps rms with a peak-to-peak of 10 ps, and the measurement range is 10 µs. Current consumption of the GPX typically ranges from 39 mA to 45 mA.
+49 7244 7419-0
ADC with serial LVDS interface
The ADS8413 and ADS8410 from Texas Instruments (TI) are 16-bit, 2 Msps successive-approximation register (SAR) analog-to-digital converters (ADC) that offer a serial LVDS interface. These devices use serial LVDS outputs to provide data transfer of up to 200 Mbps with reduced digital noise. The devices are suited for high-speed, high-precision applications.
The ADS8413 has a pseudo-bipolar, differential input and features ac performance without compromising dc precision: -107 dB total harmonic distortion (THD), 92 dB signal-to-noise ratio (SNR) and ±1 LSB integral non-linearity (INL). The ADS8410 has a unipolar, single-ended input and features -98 dB THD, 87.5 dB SNR and ±1 LSB INL.
The LVDS interface is designed to support daisy chaining or cascading of multiple devices on the same bus. Both devices feature low power dissipation of 290 mW at 2 Msps and offer two additional power-saving modes. When used at lower throughput rates, the nap mode enables substantial power-saving options. When not in use, a hardware power-down mode helps conserve energy (with 5 µW power consumption).
The ADS8413 and ADS8410 are available in 48-pin QFN packages. The ADS8413 is priced at $24.05 in 1000-piece quantities, and the ADS8410 is priced at $23.00, in 1000-piece quantities.
Test and Measurement
Site survey tool
Meritech and Cognio have teamed to provide an RFID site survey tool capable of mapping RFID reader coverage and improving network performance. Meritech will integrate the Cognio UHF RFID Cardbus module into the iSite platform. iSite is a software application created for Wi-Fi network deployments that provides a powerful design environment able to plot the coverage footprint of radio signals.
The site survey tool reduces interference between readers and improves readability for tag detection and tag performance. iSite shows plots as a floor plan overlay and includes information about signal strength, interference and coverage overlap. Plots are then used to identify and fix problem areas. iSite also provides prediction capabilities allowing network adjustments to be evaluated before they are applied.
The iSite RFID site survey tool is targeted for semi-passive tag and active tag networks where readers reach distances of up to 30 and 100 feet.
Wireless communications test set
Agilent Technologies Inc. has announced the availability of its next-generation wireless communications test set platform. The Agilent E6601A is an integrated test system in one box. It features a built-in open Windows XP PC, which allows test programs to be developed, downloaded and executed directly in the system — eliminating the test system PC.
A key feature of the E6601A test solution is its speed — up to 30% faster than other solutions. New calibration applications for GSM/GPRS/EGPRS, WCDMA and HSDPA provide scalable, multiformat capability with a software upgrade. An optional fast device tune measurement provides breakthrough test-time improvements for mobile-phone calibration, up to 10 times faster than traditional methods.
Pricing for the E6601A wireless communications test set is $27,100; GSM/GPRS calibration application is $6000; and WCDMA calibration application is $6000.
Software for radio test set
Aeroflex has announced the availability of a version of software for the 2975 Project 25 radio test set. Software release 1.9.2 delivers test features to provide additional test data for P25 radios.
Release 1.9.2 adds the functionality of an eye diagram for P25 waveform analysis. With this diagram, users can see the C4FM deviation points as well as any offset or imbalance in the four frequency levels corresponding to the C4FM modulation (±600 Hz and ±1800 Hz). This eye diagram is included in option 2975OPT30 modulation analysis and is free.
In addition, release 1.9.2 has a new option configuration to simplify the ordering of LSM testing options. Options 11 (LSM/phase 2) and 13 (LSM advanced/P25 phase 2 advanced) have been combined. The option 2975OPT29 CQPSK generate/receive and analysis provides tests for linear simulcast modulation and is available at a reduced price of $8000.
High-speed multichannel system
Acqiris offers a compact, high-speed multi-channel data acquisition system that delivers essential oscilloscope capabilities that can be combined with a desktop or laptop PC. The MAQlink3000, 5000 and 8000 systems can accommodate multiple 8-, 10- and 12-bit CompactPCI digitizers.
In addition to the PC interface, the MAQlink systems can accommodate up to 28 high-speed acquisition channels. These channels are all controlled through Acqiris' AcqirisMAQS multichannel acquisition software installed on the interfaced PC. Once installed, there is no need for extensive software development.
Pricing for a MAQlink systems starts at $5790. Delivery is six to eight weeks ARO.
Time and Frequency
Low-jitter LVPECL VCXOs
MMD Components has announced a line of compact, low-jitter low-voltage positive-emitter coupled logic (LVPECL) voltage-controlled crystal oscillators (VCXOs) with frequency ranges up to 700 MHz. Using inverted mesa and AT strip crystals, these VCXOs come in a package that measures 5 mm × 7 mm × 1.5 mm (0.2 in. × 0.28 in. × 0.06 in.).
Part of MMD's expanding MVIP series, the VCXOs are suitable in applications with extreme environmental conditions. The units can operate in temperatures from -55 °C to +125 °C, and the inverted mesa technology enables them to meet the same shock and vibration levels as oscillators operating in the 20 MHz range. The inverted mesa crystals allow extended pull ranges — up to ±200 ppm at 700 MHz — while the chemically etched AT strip crystals, operating in the fundamental mode, provide excellent VC frequency pull range and a low factory jitter in the 0.5 picoseconds root-mean-square range.
The high-frequency VCXOs are available with tristate and LVPECL differential outputs and in operating voltages of 3 V and 3.3 V. Availability for the MVIP series low-jitter LVPECL surface-mount oscillators is stock to eight weeks, with prices starting at $17.50 each in 100-unit quantities.
Coaxial resonator oscillator
Z-Communications Inc. has introduced a lead-free, RoHS-compliant, coaxial resonator oscillator (CRO3293A-LF) in C band (3288 MHz to 3298 MHz) featuring a phase noise performance of -110 dBc/Hz at 10 kHz offset from the carrier. This design offers tuning linearity with a tuning sensitivity of 10 MHz/V and covers the band between 0.5 V and 4.5 V. It is designed to operate at 5 Vdc supply while drawing 25 mA (typical) over the extended operating temperature range of -40 °C to 85 °C.
The CRO3293A-LF comes in an industry-standard MINI package measuring 0.50 in. × 0.50 in. × 0.22 in. It is designed for automated surface-mount assembly and reflow. It is available in tape-and-reel packaging for production requirements. The cost is $29.95.
FM broadcast radio tuner
Silicon Laboratories Inc. has expanded its FM tuner product family with the Si4702 and Si4703. The Si4702/03 devices leverage patented low-IF digital architecture. The Si4702/03 devices are available in a 3 mm × 3 mm × 0.55 mm package.
The Si4703 addresses feature-rich devices by offering additional detection and processing of the Radio Data Service (RDS) and Radio Broadcast Data Service (RBDS) information. The Si4703 enables data such as the station ID and song name to be displayed to the user. The Si4702/03 FM tuners are software driver-compatible with the Si4700/1 FM tuners.
The Si4702 and Si4703 are available in a 20-pin quad flat no-lead (QFN) package. Pricing for the Si4702 is $2.60, in quantities of 10K. And for the Si4703, it is $2.99 in similar quantities. Volume production is expected in the fourth quarter. An evaluation board is available for $150.
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