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ZigBee transceivers use TI SoCs

Posted: 31 May 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Alex Mendelsohn? AeroComm? ZigBee? RF transceiver? Texas Instruments?

ZigBee RF transceivers

RF supplier AeroComm Inc. is offering OEMs two ZigBee RF transceivers based on Texas Instruments' (TI) recently released IEEE-802.15.4 SoC and Z-Stack firmware.

For its part, the CC2431 SoC combines the performance of TI's CC2420 RF transceiver with an industry-standard enhanced 8051 microcontroller, 128Kbytes of flash and 8Kbytes of RAM. That's key, as no other controller is needed with Aerocomm's ZigBee Your Way modules.

With TI's embedded Z-Stack firmware, the ZB2430 is aimed at secure low-power mesh-network applications. Modules are offered as either Coordinators and Routers (full-function devices) or End-Devices (reduced-function).

Network scan, auto-configuration, dynamic routing, discovery and security enable the mesh network. These features deliver redundancy, secure multi-communication nodes, and long-range performance. Additionally, the 128Kbytes of on-module flash is ample for larger, more complex application profiles.

GUI-based development
Although the 802.15.4 PHY (physical layer) and MAC (media access control layer), and ZigBee stack, are industry standards, AeroComm's surface-mount products support lots of customization. Graphical utilities and test software assist as you configure and optimize your design.

AeroComm's ZB2430 ZigBee Your Way spread-spectrum transceivers are power-managed products for power-restricted industrial and commercial applications. Two output-power versions are offered to suit varying applications, and both can operate over the industrial temperature range.

ISM-ready
The ZB2430 modules communicate in the 2.4GHz ISM (industrial , scientific, medical) band. These ZigBee modules are full-featured, too, including battery monitors, temperature sensors, and timers.

ZigBee PHY layer data rates to 250Kbps can be implemented. A 3-V RS-232 serial interface supports local data exchanges at rates to 115Kbps.

Two power levels
A ZB2430 is a roughly 2mW (max) version, with variable power levels from -20dBm (0.01mW) to 2dBm EIRP (effective isotropic radiated power with a 2dBi antenna). Its receiver sensitivity is rated at -94dB (typical), for a 105 bit-error rate.

This module is primarily intended for battery-powered systems. A ZB2430 2mW version draws about 25mA at 3.3V delivering 0dBm of RF. Current demand drops to less than 300A in a Standby mode, dropping to less than 1A in Sleep mode and just 0.7A in a Hibernate mode. It's priced at about $19 each in quantities of 1,000.

The ZB2430-100 is a 100mW unit intended for ZigBee applications needing extended range. Its power can be varied from 10dBm to the full 20dBm EIRP.

The -100 version can be powered from a suitable DC source. It draws about 169mA at 3.3V delivering 18dBm. In Receive mode it draws about 27mA. The ZB2430-100 is priced at about $25 each in 1,000-piece orders.

Each ZB2430 kit includes evaluation boards with multiple configuration options that let you determine the feature set best suited for your application. The kits are priced from less than $200 (supporting two radios) to $995 (for five radios and conferring full factory support).

- Alex Mendelsohn
eeProductCenter




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