Electronic Design


Low-Drift RF Detector And Controller Suitable For Wireless Designs
The AD8314 RF detector and controller enables precise, temperature-stable power amplifier control with ±0.5-dB accuracy. Because of this, designers no longer have to adjust for temperature variability during manufacturing, thereby reducing design time. The device also supports all current and emerging cellular standards.

Achieving an operating frequency of up to 2500 MHz, with 45-dB dynamic range, the AD8314 handles a wide signal range. This enables it to support all current and emerging PCS standards. In addition, the instrument replaces discrete diode detectors and offers wireless designers a single-package, temperature-stable IC solution.

The AD8314 also minimizes board area due to 8-pin microSOIC packaging. This reduces required real estate by as much as 50%. Superior function makes the device an efficient solution to the measurement and control problems that plague RF transmitter designers. Its 0.5-dB accuracy can reach up to 2.5 GHz, which is a new performance level. Such a rate enables an RF engineer to design a high-performance transmitter.

The AD8314 is priced at $3.95 in 1000-piece quantities.

Analog Devices, 3 Technology Way, P.O. Box 9106, Norwood, MA 02062; (781) 329-4700; fax (781) 329-1241; www.analog.com.

900-MHz Linear Amplifier Designed For Cellular Handsets
A high-power, high-efficiency linear amplifier IC, the RF2162, targets 3-V handheld systems. It was designed for use as the final RF amplifier in dual-mode 3-V CDMA/AMPS hand-held digital cellular equipment. The device also benefits 3-V JCDMA, 3-V TDMA and AMPS, spread-spectrum systems, and other applications in the 800- to 960-MHz band.

Manufactured with an advanced gallium-arsenide (GaAs) HBT process, the RF2162 employs a single 3-V power supply and an on-board power-down mode. The device is self-contained with a 50-Ω input. Output can be matched to obtain optimum power efficiency and linearity based on the IC's 29-dBm linear output power, 29-dB linear gain, and 35% linear efficiency.

Packaged in an ultra-small leadless, plastic MLF-16, the RF2162 is available for immediate shipment at $3.97 per unit in quantities of 10,000.

RF Micro Devices, 7625 Thorndike Rd., Greensboro, NC 27409; (336) 664-1233; www.businesswire.com.

Downconverter Chip Integrates Dual Mixers And Low-Noise Amplifiers
A dual-band downconverter IC, the MC13740A, was developed for use in GSM and TDMA cellular phones. The device integrates two complete downconverters in a single 24-pin plastic TQFP surface-mount package. Its design approach allows for excellent linearity at low current, resulting in improved battery life.

The MC13740A maximizes application flexibility in IF frequency selection and filtering due to open collector outputs and simple off-chip LNA matching. It can function at a wide range of frequencies up to 2.0 GHz, thereby enabling its operation in a variety of wireless end products. Uses include GSM900, DCS1800, PCS1900, TDMA cellular phones, and 900-MHz industrial, scientific, and medical (ISM) band applications.

The low-profile package contains a backside metal contact that provides a low-inductance path to ground. Physically connected to ground of the MC13740A, this large contact area is soldered to the pc board. Because it uses the same standard reflow process as other surface- mount components, good RF grounding and better performance are ensured.

In 10,000-piece quantities, the MC13740A dual-band downconverter IC is priced at $3.00 each.

Motorola, Semiconductor Products Sector, P.O. Box 52073, Phoenix, AZ 85072; (602) 413-4991; fax (602) 413-7986; www.motorola.com/semiconductors.

Synthesizer Trio Boosts Frequency Resolution By Four Orders
Members of the fractional-N synthesizer family increase frequency resolution by four orders of magnitude compared to alternative solutions. The devices bring high performance to personal wireless connectivity applications. Their architectures deliver fine step size (below 100 Hz) to support low-phase noise, fast-switching speeds, and low power consumption.

The PS-1200 and PS-2500 have an ultra-fine step size of less than 100 Hz that allows them to be used in very narrowband wireless applications. They maintain a phase noise floor of −100 dBc/Hz up to 2.5-GHz operation, and phase detectors that can operate at a maximum speed of 25 MHz. This permits better phase noise because of the lower division value.

The PS-6500 can be used for operations requiring low power, low phase noise, and high operating frequencies. It features a 1.2-GHz auxiliary synthesizer for high IF frequencies typically seen in high-frequency WLL and WLAN applications.

Fabricated on a SiGe process, the synthesizer trio is supplied in 28-pin TSSOPs. Samples will be available in the second quarter of this year, with production quantities available in the third quarter. Packaged in 10,000-piece quantities, the PS-1200, PS-2500, and PS-6500 are priced at $4.90, $5.90, and $10.00, respectively.

Philsar Semiconductor Inc., 146 Colonnade Rd. South, Nepean, ON, Canada K2E7Y1; (613) 274-0922; fax (613) 274-0915; www.philsar.com.

PLLs Offer Improved Phase Noise At A Fraction Of The Power
The PE9600 and PE9700 PLL high-performance phase-locked loop (PLL) devices provide precise frequency synthesis capabilities for commercial satellite communications. These chips feature greater than 10 dB in phase noise improvement and a tenth of the power consumption of alternatives.

Operating at up to 2.2 GHz, the PE9600 chips are combined with an external prescaler to generate the local oscillator (LO) signals required by satellite communications transceivers. The prescaler typically divides the required LO signal frequency down to 1.4 GHz. Doing so places it within the operating frequency of the PE9600 low-phase-noise PLL. The PE9700 devices function at up to 3.0 GHz, and are intended for more modern designs.

The PE9600/PE9700 chips are fabricated in a patented ultra-thin silicon (UTSi) CMOS process technology. They also surpass the radiation-hardened requirements for reliable operation in commercial satellites. In addition, they are immune to single-event latch-up (SEL), have single-event upset (SEU) of less than 10-9 errors per bit/day, and offer total-dose radiation tolerance of 100 krad.

Offered in a 44-pin CQFJ, the PE9600 and PE9700 PLLs are priced at $2500 each in quantities of 100 for fully flight-screened devices. Samples are available now, with volume production planned for early in the third quarter.

Peregrine Semiconductor Corp., 6175 Nancy Ridge Dr., San Diego, CA 92121; (858) 455-0660; fax (858) 455-0770; www.peregrine-semi.com.

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