- Buyers Guide
868/915 MHz RF Transceiver Chip
The model CC900 totally integrated RF transceiver chip is designed for use in the European 868 MHz and US 915 MHz short-range device RF bands. Offering high flexibility and integration, the unit also complies with all requirements for communication in all 868 MHz sub-bands. The frequency-hopping spread spectrum option of the unit as well as other features that improve the communication security make the unit a good choice for critical applications such as wireless alarm and security systems. The programmable carrier frequency from 800 to 1000 MHz gives customers flexibility to use the unit in their products for the worldwide market. The long communication range (up to 500 m with 4 dBm output power) makes the product well suited for a broad range of wireless applications. The chip’s high level of integration enables high performance communication and low system cost. The fine frequency programming steps (250 Hz) enable communication in 25 kHz channels without the use of a temperature-compensated crystal oscillator (TCXO).
Chipcon Components AS, Oslo, Norway +47 22 95 85 44.
3G CDMA Chipset and System Software Solution
The model MSM5000™ Mobile Station Modem (MSM™) is a 3G CDMA 1x multicarrier solution for CDMA handsets that is compliant with the 3G standard as specified by the International Telecommunications Union (ITU). The chipset and system software allow manufacturers to design 3G handsets that, in addition to offering a rich application and feature set in small form factors, provide longer standby times and higher data rate capabilities. The unit is pin compatible with the model MSM3000™ chip and its software architecture. Pin compatibility allows the 29 handset manufacturers using the MSM3000 to introduce 3G handsets rapidly by reusing existing handset designs and software applications. The new MSM5000 exceeds the ITU’s 3G requirements for data rates in full wide-area mobility of 144 kbps by enabling data rates of 153.6 kbps on both the forward and reverse links. The solution gives operators up to twice the overall capacity of IS-95A and IS-95B systems by providing features such as fast 800 Hz forward power control and new modulation and coding schemes.
QUALCOMM Inc., San Diego, CA (858) 587-1121.
pHEMT GaAs IC SPDT Switch
The model AS191-73 pHEMT GaAs FET IC high linearity SPDT switch features +2.5 to 5 V linear operation at input power levels greater than +35 dBm. This low insertion loss (0.5 dB at 0.9 GHz), high isolation (27 dB at 0.9 GHz) switch is manufactured in the ultraminiature SOT-6 package. The switch can be used in many analog and digital wireless communication systems, including cellular, GSM and Digital Enhanced Cordless Telephony applications. Price: $1.05 each (50,000).
Alpha Industries, Woburn, MA (781) 935-5150.
PA Driver Amplifiers
The models UPG2110TB and UPG174TA power amplifier (PA) driver amplifiers feature low voltage, low current operation and low adjacent-channel power leakage to help ensure minimal distortion. Specifications for the UPG2110TB and UPG174TA include a VDD of 3 and 3.3 V, IDD of 20 and 37 mA (typ), and adjacent-channel power leakage of Ð60 and Ð42 dBc, respectively. In addition, the UPG2110TB features external input and output matching and an on-chip variable gain control function, eliminating the need for additional circuitry in the design. Housed in the 2.1 x 2.0 mm six-pin super mini-mold S06 package, the UPG2110TB is priced at $1.50 each (1,000,000). The UPG174TA is housed in the 2.8 x 2.9 mm six-pin mini-mold T06 package and is priced at $1.30 each (1,000,000).
California Eastern Laboratories, Santa Clara, CA (408) 988-3500.
High Resolution DDS
The model HSP45314 direct digital synthesizer (DDS) features a high performance architecture that delivers the fine-tuning resolution, accurate digital control and good spurious performance required by today’s evolving communications standards. The unit integrates a 48-bit programmable carrier numerically controlled oscillator, a high speed 14-bit digital-to-analog converter and a comparator circuit for square-wave generation into a single 48-pin LQFP package, and is suitable for use in point-to-point microwave systems, wireless local loop, LMDS, MMDS, satellite terminals, communications instrumentation, cable modems, NTSC/PAL video systems and last-mile wireless applications. The DDS is a monolithic IC that uses programmable numerically controlled oscillator technology together with an internal high speed, 125+ MHz D/A converter and comparator to form a complete, digitally controlled frequency synthesizer and clock generator. The device’s architecture allows the generation of output frequencies of up to one-half the reference clock frequency (62.5 MHz). Frequency shift-keying modulation is accomplished by updating the offset frequency register or toggling an enable pin. The 48-bit tuning word permits an output tuning resolution of 0.444 microhertz with a 125 MHz reference clock input. The device operates over the extended industrial temperature range of -40° to +85°C. Price: $10.20 (1000).
Intersil Corp., Melbourne, FL (888) 468-3774.