Chipcon & other RF transcievers?
in [Embedded]
|
Prev: MSP430, gcc -> IAR
Next: EasyAVR problem
From: Hw on 13 Jul 2005 17:39 Hi everyone. Has anyone here used Chipcon transciever parts? I'm thinking about using the CC2500 or maybe the CC110 for a project and wanted to find out the pro/cons for these devices. Also, is anyone aware of a part in this class (embedded RF, SPI or UART interface) that can do 1 Mbps? Finally, how good do the PCB screened antennas work for indoor use, near and around computers? I am hoping to avoid an external antenna. Thank you. H.
From: Jeremy Bentham on 14 Jul 2005 04:07 H, >Has anyone here used Chipcon transciever parts? > >I'm thinking about using the CC2500 or maybe the CC110 for a project and >wanted to find out the pro/cons for these devices. We've used the CC2420 802.15.4 / Zigbee part without any major snags, though it is important to follow their recommended PCB layout very closely, and have some decent RF test equipment to prove the design (frequency & power meters, vector signal generator etc.). >Also, is anyone aware of a part in this class (embedded RF, SPI or UART >interface) that can do 1 Mbps? 802.15.4 does 250 kbit/s at 2.4 Ghz - the next step up is 802.11, but chipset manufacturers are remarkably reluctant to sell to (or even give datasheets to) anyone buying less than a million parts per year. If you get past this hurdle the hardware design & testing isn't much harder than 802.15.4; the real killer is the software complexity. >Finally, how good do the PCB screened antennas work for indoor use, near >and around computers? I am hoping to avoid an external antenna. Most 802.11 WLAN cards have PCB antennas, but you might also consider a ceramic antenna which will have better directivity, and easier PCB design & manufacture. Jeremy Bentham Iosoft Ltd.
From: Hw on 14 Jul 2005 22:52 Hi Jeremy, In article <nj5cd1tlp6nbk6c50nb3qci9ajaa28eprq(a)4ax.com>, jb(a)iosoft.nospam.uk says... > 802.15.4 does 250 kbit/s at 2.4 Ghz - the next step up is 802.11, but > chipset manufacturers are remarkably reluctant to sell to (or even > give datasheets to) anyone buying less than a million parts per year. > If you get past this hurdle the hardware design & testing isn't much > harder than 802.15.4; the real killer is the software complexity. Yeah, that's exactly why I was looking for a Chipcon type device -- 802.11 is a mess I don't at all want to cross into. I'm even avoiding Zigbee because it's more complex than what I need (point-to-point RF). I know of a few other parts like it from guys like Atmel, Micrel, etc, just didn't know if anyone here had used a part and found it particularly compelling (or not). > >Finally, how good do the PCB screened antennas work for indoor use, near > >and around computers? I am hoping to avoid an external antenna. > > Most 802.11 WLAN cards have PCB antennas, but you might also consider > a ceramic antenna which will have better directivity, and easier PCB > design & manufacture. Did you end up doing a PCB antenna or going for a ceramic element? Thanks. HW.
From: Jeremy Bentham on 15 Jul 2005 05:38 Hw, >Yeah, that's exactly why I was looking for a Chipcon type device -- >802.11 is a mess I don't at all want to cross into. I'm even avoiding >Zigbee because it's more complex than what I need (point-to-point RF). A lot of developers are doing this; they use the 802.15.4 data transport, with the possibility of upgrading the software to Zigbee at a later date (a "Zigbee Ready" device). >I know of a few other parts like it from guys like Atmel, Micrel, etc, >just didn't know if anyone here had used a part and found it >particularly compelling (or not). We have no experience of these parts, but are very happy with our choice of Chipcon; they're the most helpful semiconductor company I've come across. >Did you end up doing a PCB antenna or going for a ceramic element? Neither; the current design has antenna connectors. Jeremy Bentham Iosoft Ltd.
From: Pieter Kruger on 15 Jul 2005 08:58
Hi... You can also look at NordIc, the nRF2401, radio only chip or the nRF2E41 which is the nRF2401 with a 8051 added. These are very easy to use and reliable. They are not really suited if you want to transmit large amounts of data because their packet size is very limited, but they are easy to use and setup. Good luck. Pieter. "Hw" <localhost(a)com.com> wrote in message news:CSfBe.7235$rF5.3725(a)tornado.socal.rr.com... > Hi everyone. > > Has anyone here used Chipcon transciever parts? > > I'm thinking about using the CC2500 or maybe the CC110 for a project and > wanted to find out the pro/cons for these devices. > > Also, is anyone aware of a part in this class (embedded RF, SPI or UART > interface) that can do 1 Mbps? > > Finally, how good do the PCB screened antennas work for indoor use, near > and around computers? I am hoping to avoid an external antenna. > > Thank you. > H. |