Like other wireless-communications specifications, ZigBee is driving increasingly higher levels of integration. A recent example is a line of ZigBee transceiver integrated circuits (ICs) that combines a ZigBee-compliant RF transceiver with an 8051-based, 8-b microprocessor. Known as the ZIC2410 series, these systems-on-a-chip (SoCs) have a transmit/receive frequency range of 2.400 to 2.4835 GHz. They deliver +8 dBm output power. Receiver sensitivity is 98 dBm. The transceivers flaunt a link budget of 106 dB. They operate from +1.5 to +3.3 VDC. Power consumption in transmit mode is 30.6 mA at 0 dBm for the QN48 package. For the VFBGA72, current consumption is 29.7 mA at 0 dBm (also in transmit mode). In receive and standby mode, current consumption is 33.2 mA and 0.3 A, respectively. The microprocessor offers peripherals including an on-board a-law/ - law audio codec with ADPCM support. When combined with an I2S interface, this codec enables the ZIC2410 to transmit voice data.

California Eastern Laboratories, 4590 Patrick Henry Dr., Santa Clara, CA 95054-1817; (408) 919-2500, Fax: (408) 988-0279, Internet: www.cel.com.

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