nrf automotive grade

RE: nrf automotive grade

Jørgen Holmefjord — Thu, 27 Jul 2017 08:34:59 GMT

You can chose to use the balun or a discrete matching network. Have a look at this answer for more details. You will also need antenna with both alternatives

RE: nrf automotive grade

pavan — Thu, 27 Jul 2017 08:14:36 GMT

Hello ,

Thanks for the information. but for QFN package i.e for "nRF51x22-QFAx Reference Layout 2_4" they have used PCB antena. not the "BAL-NRF01D3" ..please confirm

RE: nrf automotive grade

Jørgen Holmefjord — Thu, 27 Jul 2017 07:33:42 GMT

Hi,

This depends on which package of the chip you are planning to use. nRF51x22-CxAx Reference Layout 1_3 are for CSP packages and nRF51x22-QFAx Reference Layout 2_4 are for QFN package. Looking at the nRF51824 compatibility matrix, this chip is only available in QFN package.
The BAL-NRF02D3 (BAL-NRF01D3 should be used for QFN packages) is a balun, used for converting signal from balanced to unbalanced. The part also include matching network and harmonics filter. You can read more about baluns in this and this thread.
Any of the GPIO pins can be used for UART. Please have a look at the UART peripheral example, and the BLE UART example in our SDK.

Best regards,

Jørgen