Component Specifier: Filters/Oscillators

FILTERS TYPE/Model ...

June 21, 2004

3 min read

FILTERS
TYPE/Model	Features	P & A	Source
EMI SUPPRESSION NFA21SL series	Designed for use in high-frequency, high-speed applications like cell phones and digital TVs; combines four circuits in small 0805 package for less consumption of board space and more compact end products; provides steep insertion-loss characteristics that allow for noise suppression in the 800-MHz and higher ranges	$0.34 per unit; eight to 10 weeks	Murata Electronics North America www.murata.com (770) 436-1300
ACTIVE RECEIVE MIXER AD8344	Suitable in wireless infrastructure designs; has 50-(omega) broadband inputs for the RF and LO ports; input linearity of +24-dBm third-order input intercept (IIP3) with +3-dB conversion gain and an 11.5-dB noise figure at 900 MHz; packaged in a 3- by 3-mm leadframe chip-scale package (LFCSP)	$3.50 each in 1000-piece quantities; samples available now	Analog Devices www.analog.com (800) 262-5643
OSCILLATORS
TYPE/Model	Features	P & A	Source
LOW-FREQUENCY, SPREAD-SPECTRUM DS1090 EconOscillator	Ideal as an external clock for switched-mode power supplies; offers output frequencies between 125 kHz and 8 MHz with 3- to 5.5-V single-supply operation; users can choose from dither percentages of 0%, 2%, 4%, and 8% and dither rates of fMOSC/512, 1024, 2048, and 4096; operates from -40°C to 85°C; housed in eight-pin microSOP (small-outline package)	Starts at $0.68 each in 1000-unit quantities; 16 weeks	Dallas Semiconductor www.maxim-ic.com (800) 998-8800
MICROMINIATURE CRYSTAL CLOCK NZ2520 series	Meant for portable devices; measures 2.5 by 2.0 by 0.9 mm and weighs 0.02 g; available in a frequency range of 1.5 to 67.5 MHz; operates from 2.5 or 3.0 V dc while consuming 3.5 mA; can fan out up to 15 IC gates; operating temperature ranges from -20°C to 70°C with frequency stability of ±30 ppm from -10°C to 60°C	About $1.40 each in 10,000-piece lots; engineering samples are available	NDK www.ndkxtal.com (800) NDK-XTAL
VOLTAGE-CONTROLLED OSCILLATOR (VCO) V910ME01	Intended for the microwave radio market; delivers 3930 to 4200 MHz within 1.5 to 11 V dc of control voltage; covers the 270-MHz bandwidth with an average tuning sensitivity of 45 MHz/V; realizes spectral purity of -111 dBc/Hz, typically, at 100 kHz from the carrier; measures 0.5 by 0.5 by 0.13 in.	Starts at $11.95; stock	Z-Communications www.zcomm.com (858) 621-2700
LOW-PHASE-NOISE VCO CVCO55BH-5256-5356	Aimed at digital radio equipment, fixed wireless access, satellite comunications systems, and basestations; frequency range of 5256 to 5356 MHz with a tuning voltage range of 1 to 4 V dc; typical phase noise of -86 dBc/Hz at 10 kHz; output power of 0 ±2.0 dBm into a 50-(omega) load; 5-V dc supply; typical 25-mA current consumption; housed in a 0.5- by 0.5-in. square surface-mount package	Starts at $14.80 in volume; four weeks	Crystek Crystals Corp. www.crystek.com (800) 237-3061
TEMPERATURE- COMPENSATED CRYSTAL VCO CFPT-125 series	Designed to withstand a peak reflow soldering temperature of 260°C for 10 seconds, suiting it for lead-free soldering processes; has a standard frequency stability of ±0.9 ppm from -20°C to 70°C; provides HCMOS output; operates from 3.3-V supply and typically draws 3 mA; surface-mount package measures 7 by 5 by 2 mm	Ranges from $4 to $8 depending on quantity; eight to 10 weeks	C-MAC Micro Technology www.cmac.com (919) 941-9333
TEMPERATURE- COMPENSATED CRYSTAL VCO FOX783	Made for telecom, basestation, avionics, satellite, military, test equipment, and other high-frequency applications; suits use with 1.5- to 312.0-MHz frequencies; standard frequency stability over operating-temperature range of -40°C to 85°C; frequency tolerance of ±5.0 ppm; tighter tolerances to ±1.0 available	Begins at $68 each in 1000-unit quantities; delivery is eight weeks ARO	Fox Electronics www.foxonline.com (888) GET-2-FOX