Hardware Update – New Radio Board

We  are currently evaluating the CC1120 Sub-Ghz radio from TI.  Our existing solutions use the CC1101 Sub-Ghz  radio (again from TI).

Here is a pic of the first version of  our WSN1120l  mesh node. The radio board is mated to our micro PCB which hosts the MSP430G2955  ultra-low power 16 bit micro from TI. Our modular design allows us to easily change the radio and micro-controller.

wsn1120l

The CC1120 radio board (WSR1120) has a PCB  antenna as well as a U.FL connector to connect to an external antenna.  We will be offering two different CC1120 radio boards (one with a PCB antenna and the other with U.FL connector). The U.FL version will have a smaller form factor (similar to our CC1101 radio board which is 30 mm x 27.5 mm).

This node will also operate in the 865-867 MHz  license free band  in India.

The CC1120 radio control and user interface are based on the widely used CC1101 transceiver.  This relationship enables an easy transition between the two platforms. The command strobes  and the main radio states are the same for the two platforms.

 

Here  are some of the  key differences between the CC1101 radio and the  CC1120 radio. Will include selectivity/blocking in another post. The table shows that the CC1120 is  better in every respect except that it costs more.

Parameter CC1101 CC1120
Data FIFO RX-64 / TX-64    RX-128  / TX-128 
Data Rate    0.6 to 600 kbps 0 to 200 kbps
Sensitivity           –112 dBm @ 1.2 kBaud

  • 865-867 MHz
  • 58 kHz CHF
  • GFSK
  • 5.2 kHz deviation
-123 dBm @ 1.2 kbaud

  • 865-867 MHz
  • 10 kHz CHF
  • GFSK
  • 4 kHz deviation
Max Tx Power +10 dBm +14 dBm   
Operating supply Voltage 1.8V to 3.6V 2.0V to 3.6V
IO GPIO0, GPIO2 GPIO0, GPIO2, GPIO3
External Crystal Oscillator 26 MHz 32 MHz
Digital channel filter programmable BW (CHF)   58 KHz to 812 KHz 8 KHz to 200 KHz 
Narrow-Band            No Narrow-band Wireless Systems With Channel Spacing Down to 12.5 kHz
RF carrier phase noise (indicates quality of carrier signal) -92 dBc//HZ  at 40kHz offset -111 dBc/HZ  at 10kHz offset

(Much better)

Support for re-transmissions No Yes
Support for auto acknowledgments       No Yes
TCXO Support and Control

(Temperature compensated  crystal oscillator)

No Yes
Wave-Match No Yes

 

References:

 

For more information on WiSense, please visit wisense.in.

 

Posted on August 17, 2016, in Uncategorized. Bookmark the permalink. Leave a comment.

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