Does DLP7970AABP offer longer read distance than the TRF7970AEVM?

Arian Papajani

Other Parts Discussed in Thread: TRF7970A

The TRF7970AEVM read distance for 14443 A/B standard is not that great, it is short of the EMVco specification compliance.

Does anyone know if the DLP7970AABP offers a better read distance than the TRF7970AEVM?

over 9 years ago

0 Josh Wyatt over 9 years ago

TI__Guru* 91206 points

Arian -

the TRF79xxA devices (like every other 200mW transceiver IC out there) do not on their own generate the complete operating volume required by EMVCo, nor do they have a large enough onboard antenna for that application use case. This application requires an amplifier and at least a 4cm x 4cm antenna (or larger, up to 6cm x 6cm) which we have an unreleased examples of.

0 Arian Papajani over 9 years ago in reply to Josh Wyatt

Intellectual 320 points

I agree with your assessment and thank you!
We got to implement the amplifying circuit but the minimum 6VDC for it is been a great obstacle.

0 Josh Wyatt over 9 years ago in reply to Arian Papajani

TI__Guru* 91206 points

yes, we used ~6.1 or 6.3VDC to achieve operating volume on the amplifier section rail.

0 Arian Papajani over 9 years ago in reply to Josh Wyatt

Intellectual 320 points

Did TI published the information regarding the PA (TRF7970A_PA_MODULE_REV10)? Is there any ready module for public use?

0 Josh Wyatt over 9 years ago in reply to Arian Papajani

TI__Guru* 91206 points

not at the moment - we can provide reference design application note and design files
pls. send me email: josh.wyatt@ti.com

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Does DLP7970AABP offer longer read distance than the TRF7970AEVM?