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 Active Components Sep 1, 2004 12:00 PM Voltage variable attenuators
Mini-Circuits' RVA-2500, 10 MHz to 2500 MHz broadband voltage variable attenuators provide up to 55 dB (typ) attenuation and +43 dBm IP3 (typical) while maintaining constant in/out VSWR and insertion phase over the full attenuation range. This RVA-2500 model has built-in biasing and matching network, and is housed in a shielded case for superior performance on PC board. In quantities of 10, the price for RVA-2500 starts at $9.95 each. Mini-Circuits GaAs MMIC balanced mixer
Mimix Broadband's gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) fundamental balanced mixer has been optimized for use as a down-converter. Using 0.15 micron gate length GaAs pseudomorphic high electron mobility transistor (pHEMT) device model technology, this mixer covers the 32 GHz to 42 GHz frequency bands. The device has conversion loss of 8 dB with 22 dBm input third-order intercept point. This mixer, 40BRFM0058, is suited for wireless communications applications such as millimeter-wave point-to-point radio, local multipoint distribution services (LMDS) and SATCOM. Mimix performs 100% on-wafer RF testing on the 40BRFM0058, as well as 100% visual inspection to MIL-STD-883 method 2010. The chip also has surface passivation to protect and provide a rugged part with backside via holes and gold metallization to allow either a conductive epoxy or eutectic solder die attach process. Engineering samples are available from stock, and production quantities are available six to eight weeks ARO. The 40BRFM0058 datasheet and additional product information can be obtained from the Mimix Broadband web site. Mimix Broadband Crystal-based ASK/FSK transmitter
Maxim Integrated Products offers the MAX1479, a miniature VHF/UHF PLL-based ASK/FSK transmitter to deliver more than +10 dBm output. It is housed in a small, 3 mm × 3 mm, 16-pin thin QFN package. This transmitter is suited for low-cost, high-volume applications where space is critical, such as tire pressure monitoring systems (TPMS), key fobs, security products, garage door openers, and remote sensors operating in the 300 MHz to 450 MHz band. The MAX1479 has a simple data interface and a divider-programmable clock-out feature that eliminates the need for an MCU resonator. The MAX1479 is designed to run directly off a lithium cell, and will operate down to 2.1 V, consuming only 0.2 nA of current in standby mode. The output power of the MAX1479 can be adjusted from -10 dBm to +10 dBm into a 50-Ohm load by using an external resistor. At the +10 dBm power level, the MAX1479 consumes 6.7 mA of current at 315 MHz when using a 50% duty-cycle encoding scheme, such as Manchester. Current consumption is only 4.5 mA at 0 dBm output. The part can transmit at date rates up to 100 kbps in ASK and 20 kbps in FSK (both Manchester encoded). Once the enable pin of the MAX1479 is activated, it takes only 200 microseconds for the PLL and crystal to settle and be available to transmit. As the device is targeted at small, portable applications, the MAX1479 accepts crystal frequencies from 9 MHz to 15 MHz, widely available in inexpensive, surface-mount packages. The MAX1479 operates over the automotive temperature range (-40°C to +125°C). Prices start at $0.99 (10,000-up, FOB USA). Evaluation kits are available to speed designs. Maxim Integrated Products Infrared emitter
A high-speed LED infrared (IR) emitter from Agilent Technologies' Semiconductor Products Group uses the company's high-power aluminum gallium arsenide (AlGaAs) LED technology, which has been optimized for high radiant intensity, speed and low forward voltage. The HSDL-4261 IR emitter provides manufacturers with a low-cost illumination source suitable for communication devices and IR LANs to consumer products such as optical mice, IR headphones, microphones and keyboards. The HSDL-4261 emitter features 15 ns rise time and 45 ns fall time (10% to 90%), with intensities of up to 180 mW/sr (typical) at ILED = 100 mA at a 26° viewing angle. It operates at the 870 nm optical wavelength and is supplied in an industry-standard 5 mm (T-1 3/4) form-factor package. The Agilent IR emitter is built with iron lead frames that dissipate power efficiently over a range of currents. The forward voltage is a low 1.40 volts at 20 mA, which, in some applications, allows two or more of the emitters to be connected in series without exceeding the supply-voltage capability. The HSDL-4261 is priced at $0.12 each in moderate volumes and is available through manufacturer's direct sales channel and worldwide distribution partners. Agilent Technologies Gunn diodes
MicroWave Technology Inc., an IXYS Company, is adding a line of Gunn diode products. The first is the MwT-GK, K-band 18Hz to 26.5 GHz Gunn diode. It is available in chip and microwave ceramic packages. The product is based on MwT proprietary epitaxial profile design and process technology. It is fabricated at MwT GaAs fab using process technologies that have proven reliability for commercial and hi-rel/space applications. The MwT-GK has high output power of 13 dBm and excellent chirp performance in pulse mode applications. This Gunn diode is designed for CW and pulsed mode K-band frequency source applications. Plus, it offers excellent low phase noise characteristics. Applications include motion detection and surveillance, microwave transmitters and receivers, military radar systems, Gunn diode oscillators, radar detectors, microwave radio links and instrumentation. The MwT-GK series of Gunn Diodes are available from stock up to 20K pieces (chip form). MicroWave Technology Inc. 3 GHz Log RF detector
Linear Technology Corp.'s high-performance logarithmic type RF detector, the LT5534, can detect RF signals up to 3 GHz. It is designed for cellular base station receivers and transmitters, subscriber radios, instrumentation applications, and other high-performance transceivers, enabling accurate RF power control and RSSI measurement. The LT5534 has a log-linear transfer characteristic with a total dynamic range of 60 dB. Its output is directly proportional to the logarithm of the average RF voltage input. The device has exceptional temperature stability. At 900 MHz, the LT5534 provides repeatable measurement of RF power within ±1dB over a typical 50 dB dynamic range, while spanning the temperature extremes of -40°C to 85°C. It has excellent sensitivity, detecting signals as small as -63 dBm. The LT5534 operates over a wide RF input frequency range, from 50 MHz to 3 GHz. Its output buffer has a 30 MHz bandwidth that can track fast RF signal level transitions. It is capable of detecting full-scale RF changes with 38 ns delay. Internally, the chip contains temperature-compensation circuitry that provides stable and accurate measurements over the full range of temperature extremes. The LT5534 operates from a single 2.7 V to 5.25 V supply, drawing a quiescent current of 7 mA. The device is the first product offering this level of performance in a six lead 2 mm × 2 mm surface-mount SC-70 package. The price in 1,000-piece quantities is $4.50. Linear Technology Corp. 1 GHz voltage feedback op-amp
To simplify design, Analog Devices' AD8045 combines voltage feedback architecture and unity gain stability with 1 GHz speed, low noise and low distortion. It can slew at 1350 V/µs and settle to 0.1% in 7.5 ns. With spurious-free dynamic range (SFDR) of 101 dBc at 5 MHz and low noise of 3 nV/rt Hz, the amplifier is suited for systems that demand high resolution at high speeds such as medical instrumentation, ATE and data acquisition systems. In addition to these AC specifications, the AD8045 has superior DC characteristics with a voltage offset of 200 µV and input bias current of 2 µA. The amplifier can operate on supply voltages between 3.3 V and 12 V. The AD8045 features an advanced pin-out to enhance performance and stability over traditional amplifier pin-outs. The AD8045 uses this standard pin-out to reduce the mutual inductance-and resulting distortion products caused by the coupling between positive input and negative supply. The amplifier also provides two output pins to reduce feedback parasitics. This simplifies board layout and increases the stability of the amplifier. The AD8045 is available in full production quantities. The part is specified over the extended industrial temperature range (-40°C to +125°C) and is available in 3 mm × 3 mm lead-frame chip scale package (LFCSP) and an 8-lead small-outline integrated circuit (SOIC). Both packages feature an exposed paddle that provides better thermal characteristics. In either packaging option, the device is priced at $1.39 per unit in 1,000-piece quantities. Analog Devices Low-power UHF receiver
Micrel's MICRF009, a QwikRadio, is a low-power single chip, ASK/OOK (ON-OFF Keyed) UHF receiver IC. It is aimed at the automotive remote keyless entry (RKE), remote light and fan control, long-range RFID, and garage door and gate openers. The IC offers enhanced performance over other QwikRadio receivers by providing higher sensitivity and faster recovery from shutdown. The MICRF009 is shipping in volume quantities and is priced at $1.88 in 1K quantities. The IC features sensitivity typically 6 dB higher than previous MICRF00x series chips. It offers quicker recovery from shutdown, characteristically 1ms. The receiver has a frequency range of 300 MHz to 440 MHz, and a data rate up to 2.0 kbps (Manchester encoding). The MICRF009 also provides designers with low power consumption (2.9 mA fully operational; 315 MHz). The MICRF009 offer two modes of operation: fixed-mode (FIX) and sweep-mode (SWP). In fixed-mode the MICRF009 functions as a conventional superheterodyne receiver. In sweep-mode the MICRF009 employs a patented sweeping function to sweep a wider RF spectrum. Fixed-mode provides better selectivity and sensitivity performance while sweep mode enables the MICRF009 to be used with low-cost, imprecise transmitters. It comes in 16-pin SOIC packaging. Micrel Inc. SAW duplexer
Murata Manufacturing Co. Ltd. has commercialized a small, lightweight SAW duplexer for 1.9 GHz band PCS portable phones. This product is a module type with SMD type SAW filter and matching element mounted on the PCB. Its compact size is 5.0 × 5.0 × 1.65 mm max. The frequency temperature coefficient (frequency variance per 1° centigrade), from about -42 ppm/degrees centigrade to about -14 ppm/degrees centigrade by incorporating Murata's material selection as well as design approach for IDT. It features excellent attenuation characteristics over the range of temperatures between -30° to 85° centigrade for 1.9 GHz band PCS having a narrow frequency gap of only 20 MHz between the Tx band and Rx band. This product displays superior input power to meet market demand (guaranteed for 10,000 hours at 55° centigrade atmospheric temperature and 0.8 W operation wattage). Mass production quantity of this product is at 1 million units per month. By this month, the company will produce two million units per month. Murata Manufacturing Co. Quadrature modulator
Skyworks Solutions Inc. has announced its latest DCR component, the SKY73010-a single-chip direct quadrature modulator. The SKY73010 direct quadrature modulator accepts input frequencies from direct current to 250 MHz with a broad RF and local oscillator (LO) frequency range of 300 MHz to 2500 MHz. It provides superb broadband noise floor of -155 dBm/Hz, with 35 dBc and 45 dBc carrier and sideband suppression, respectively, at a LO input power of 0 dBm. The SKY73010 is manufactured in a Silicon Germanium BiPolar Complementary Metal Oxide Semiconductor (SiGe BiCMOS) process, and a lead-free 16-pin, 4 × 4 mm, RF land grid array (RFLGA) surface-mount package. Skyworks' SKY73010 direct quadrature modulator is available and priced at $5.25 in quantities of 10,000. Skyworks Solutions Inc. Downconverter
Hittite Microwave has introduced a dual downconverter. The HMC381LP6 is a high linearity dual downconverter receiver IC that operates from 1.7 GHz to 2.2 GHz and delivers a +27dBm input third-order intercept point for UMTS and PHS applications. The passive mixer outputs and high dynamic range IF amplifier inputs are positioned so that an external IF filter can be placed in series between them. The converter provides a gain of 9 dB and 12 dB typical single sideband noise figure. The IC operates from a positive +5V rail consuming 260 mA of current while requiring a LO drive level of only -4 dBm to +4 dBm. The design requires no external baluns and supports IF frequencies between 50 MHz and 300 MHz. Hittite Microwave Active splitter
Anadigics Inc. has announced the APS3602 active splitter for cable TV (CATV) set-top box applications. The highly linear APS3602 is offered in a 5 mm by 5 mm surface-mount package, which makes the device ideal for use in space-sensitive multiple-tuner set-top boxes with personal video recording and digital video recording functionality. Each of the output paths in Anadigics' active splitter includes independent gain control, eliminating the need for front-end automatic gain control functionality at the tuner. Anadigics' APS3602 active splitter amplifies the input signals using highly linear, low noise amplification stages, and couples the amplified signal to three output paths to drive video tuner inputs. The product provides high linearity over its full dynamic range and offers a noise figure of 5 dB at 5 dB gain. The active splitter operates in the 50 MHz to 860 MHz range and requires only a single +5 V power supply. The APS3602 is priced at $3.85 in quantities of 1,000 units. Samples are available. Anadigics Inc. Splitter
Mini-Circuits has introduced 315 MHz to 1460 MHz two-way 90° HPQ splitter series. The splitter is housed in a 0.200-inch square surface-mount package. Isolation ranges from 19 dB to 26dB typical and insertion loss is 0.17 dB to 0.30 dB (typ) with excellent amplitude-phase unbalance and input-output VSWR. The frequency range is 0.5 MHz to 2.4 MHz. Price is from $6.95 each in quantities of 10 units. Mini-Circuits SP6T switch
MA/Com has introduced a 2.5V high- power SP6T switch die intended for dual-, tri- or quad-band GSM and DCS/PCS handsets. The SP6T topology enables quad-band switching with a single chip. Features include 2 Tx, 4 Rx ports on chip, 35 dB Tx/Rx isolation, less than 0.6 dB Tx loss (2 GHz) and harmonics better than -70 dBc at +34.5 dBm input at 1 GHz. The switch is intended for low voltage, high power, low- cost applications. The SP6T is manufactured using a 0.5 micron GaAs pHEMT process. Devices shipped using Known Good Die testing techniques. M/A Com PHEMT transistors
MicroWave Technology Inc.'s “PH” series of power pseudomorphic-high-electron-mobility-transistor (pHEMT) AlGaAs/InGaAs devices, MwT-PH-7, PH-15, and PH-16, are suited for applications requiring medium power, high-gain, good linearity, high PAE (power-added efficiency) and high power density. They operate from low frequencies up to 28 GHz. These pHEMTs are effective for wideband (6 GHz to 18 GHz) or narrowband applications. They have a P1 dB that is nearly double that of standard GaAs MES FETs with the same geometry. These pHEMTs are produced using MwT's metal systems designs. All devices from each wafer are 100% DC screened and IDSS binned. Each wafer under goes a qualification process to ensure high quality and reliability. All MwT PH series chips are passivated using MwT's patented “Diamond-Like Carbon” process for increased durability. These devices use the same layout and bonding as the MwT-7, MwT-15 and MwT-16 MESFETs. More pHEMTs are coming out at higher power levels. This product is fabricated at MwT GaAs using process technologies with reliability for commercial and hi-rel/space applications. These devices are available in chip and package form from stock. MicroWave Technology Inc.
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