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ETRX357HR ZigBee Module with onboard uFL antenna

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 Product Description

ETRX3 ZigBee Module

The ETRX357HR has onboard uFL connector for external antenna connection

Our most advanced family of ZigBee Modules to date.

The ETRX3 series is the 3rd generation of advanced ZigBee modules from Telegesis and the first module family on the market to feature the EM357 and EM351- the latest ARM® Cortex M-3 SOC's from Ember.

ETRX3 series modules have a footprint of just 19mm x 25mm for both standard and PA/LNA versions which represents a 40%reduction in size compared to the ETRX2 module. They will be available with either an on board antennae or a Hirose U.FL connector to allow connection of external antennae.

A link budget of 105dB on the standard ETRX3 module gives excellent performance and RF power can be further boosted by use of the ETRX3-LRS which adds the new SiGe SE2432 front-end module containing both LNA+PA for highest possible link budget.

The ETRX3 series are low power 2.4GHz ZigBee modules integrating a 2.4 GHz, IEEE 802.15.4 compliant transceiver with up to 192k of flash, 12k of RAM, and many advanced peripherals.

The EM357 and EM351 utilise an efficient architecture that exceeds the dynamic range requirements imposed by the IEEE 802.15.4-2003 standard by over 15 dB. The integrated receive channel filtering allows for robust co-existence with other communication standards in the 2.4 GHz spectrum, such as IEEE 802.11 and Bluetooth.

The ARM® Cortex M3 microprocessor is optimised for high performance, low power consumption, and efficient memory utilisation making it ideal for use in ZigBee applications. To maintain the strict timing requirements imposed by the ZigBee and IEEE 802.15.4-2003 standards, the EM357and EM351 integrate a number of MAC functions into the hardware handling automatic ACK transmission and reception, automatic backoff delay, and clear channel assessment for transmission, as well as automatic filtering of received packets.

ETRX3 series modules work from a 2.1v to 3.6v supply and active power consumption is reduced by over 20% compared to the ETRX2. In deep sleep mode, current consumption is reduced to 800nA and further reduced to 400na if the self wakeup feature is not enabled.

ETRX3 series modules features all the advanced software already present on other Telegesis ZigBee modules such as the Telegesis AT command set which allows the designer to use the functionality of the EmberZNet stack without the need for complex embedded code. Development is also made easier by the addition of an integrated JTAG and debugging interface.

As with all our modules, ETRX3 series devcies are designed to be easily integrated into designs without the need for RF or embedded expertise. Using the latest version of Embers Znet PRO meshing technology ETRX3 family modules allows designers to add the latest meshing radio technology without complex software engineering.

ETRX3 series module featuresetrx3-pair-01.jpg

• EM300 series ZigBee SOC featuring 32-bit ARM® Cortex-M3 processor
• Dimensions 19mm x 25 mm x 3.8 mm
• Up to 192k of Flash, 12k of RAM
• ETRX35x high RX Sensitivity -99dBm (-100dBm Boost)

• ETRX35x-LRS high RX Sensitivity -106dBm
• ETRX35x TX output power 3dBm (5dBm Boost)

• ETRX35x-LRS TX output power +20dBm (adjustable down to -21dBm)
• ETRX35x RX current: 25mA, TX current: 31mA at 3dBm

• ETRX35x-LRS RX current: 31.5mA, TX current: 140mA at 20dBm

• 128µS Wakeup
• Improved Hardware MAC Acceleration
• JTAG Interface for Programming and Debugging
• Improved Peripherals (ADC, timers etc.)

• Chip Antenna or U.FL coaxial Connector

• FCC compliance modular approval

• CE European Regulations

• Approvals for Canada, S Africa, Australia & NZ


ZigBee PRO

Telegesis believes ZigBee PRO offers significant advantages or your next design in many key areas of operation such as scalability of large networks, security, network resilience and ease of commissioning. This is why we have chosen it as standard for our range of modules and peripherals to give our customers the best experience of designing with ZigBee. When ordering any of our products with ZigBee PRO please request Firmware R3.


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