reg tms3705 testing

yakasi kumar

Prodigy 145 points

Other Parts Discussed in Thread: TMS3705

hai josh,

i connected tms3705 in the same manner that was given in the application circuitry

SCBA020

i dont know how to check whether ic is working or not can u suggest me any solution.

regards

bharath

over 15 years ago

0 Josh Wyatt over 15 years ago

TI__Guru* 91336 points

Bharath -

Please see attached training documents/notes on the TMS3705. Basically, to start out with, if you drop TXCT line, then the TX will come on, which you could see with o'scope or spectrum analyzer. Then you can move on to putting tag in field, dropping TXCT line for 50mSec for general read and look for response from standard RO/RW TI tag (see ppt)

1016.LF TMS3705A ASIC.pdf 4011.Notes on TMS3705A1DRG4 & Read.ppt

0 yakasi kumar over 15 years ago in reply to Josh Wyatt

Prodigy 145 points

hai josh,

thanx for the in formation and one more thing i should a get a carrier signal of 134khz across the antenna pins right?. when i first connect the circuitry i changed the capacitor 22uf polarity due to that it burnt out this wont damage the tms3705 ic right?

regards

bharath

0 Josh Wyatt over 15 years ago in reply to yakasi kumar

TI__Guru* 91336 points

Bharath -

as i am not sure of your ckt. can't guarantee that you have not damaged the TMS3705, but, yes if you follow the procedure for turning on the carrier, you will then be able to observe it.

0 yakasi kumar over 15 years ago in reply to Josh Wyatt

Prodigy 145 points

HAI JOSH, THANX FOR THE SUPPORT ONE MORE THING I HAVE GONE THROUGH UR PDF i.e LF TMS3705A ASIC.PDF IN THAT U HAVE GIVEN A TRANSCEIVER MODULE WITH ANTENNA MAY I KNOW THE COST OF THAT MODULE PLEASE REGARDS BHARATH

0 Josh Wyatt over 15 years ago in reply to yakasi kumar

TI__Guru* 91336 points

Bharath - the ez430-TMS37157 kit is avaialble through eStore for $199, https://estore.ti.com/Search.aspx?k=ez430-TMS37157 and Digikey for $226 http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=ez430-TMS

0 yakasi kumar over 15 years ago in reply to Josh Wyatt

Prodigy 145 points

josh, i want the cost of the tranceiver antenna module given in the LF TMS3705A ASIC PDF please look into that pdf regards bharath

0 Josh Wyatt over 15 years ago in reply to yakasi kumar

TI__Guru* 91336 points

Bharath - we don't sell just the antenna as we buy this ourselves. This is a Vogt antenna (now Sumida), drawing is attached - but you need to contact them about any price for that.

581_05_042_40-2009_12_23.pdf