FXLS8471Q replacement from NXP

[adeleon71]

Hi. FXLS8471 is in EOL status. It lent us an excellent service with nice performance for my application.
It is a difficult time to search for a replacement. I understand that.
Are there any updates of possible replacement of FXLS8471Q ? 
What I need is  an 14bit (may be 12bit with very low noise), +/-2g @ < 100 Hz, in full production status. One year has gone since EOL notification and we still can not find a replacement or similar part from NXP brand.
Any comments or plans will be appreciated. Thank you!

[JozefKozon]

Hi Adelon,

the discontinuation of the FXLS8471. The replacement is FXLS8462 which will be later replaced with pin and software compatible FXLS8964/67/74 family of accelerometers.

With Best Regards,

Jozef

[adeleon71]

Josef: I don't think it is neither exact nor fair to mark this answer as a solution to this situation. 
Recommended parts in your answer are obsolete (FXLS8962 is non stocked, last time buy listed) and/or non stocked anywhere and all of them have less resolution than the 14 bits FXLS8471.
Please tell me if I am missing something that could lead an NXP faithful follower to a solution, among NXP portfolio.

[JozefKozon · Accepted solution]

Hi Adelon,

I apologize, that the FXLS8962 is not available anymore. It supposed to be available. It seems its sold out earlier than we thought. But has 12-bit resolution, so it wouldn't help you anyway.

Unfortunately currently we do not have a 14-bit 3-axis accelerometer, in Active stage of life in our portfolio, but I have checked the distributor pages and Mouser has 108 of MMA8491QR1 (End Of Life) in stock and another 20 000 can be ordered. 

https://www.nxp.com/products/sensors/accelerometers:ACCELEROMETERS

https://www.mouser.com/ProductDetail/NXP/MMA8491QR1?qs=sGAEpiMZZMsI%2FesINBwTt%252B%2F5LLuZJZqJmOeUn...

Also Arrow has 7 pieces of MMA8491QR1 in stock. Perhaps they will have more pieces to order. 

https://www.arrow.com/en/products/mma8491qr1/nxp-semiconductors?q=MMA8491QR1

I hope it will help you and I apologize for inconvenience.

With Best Regards,

Jozef

[adeleon71]

Thank you for your answer.

  In our case, as we need a +/-2g span, we should study oversampling MMA8491Q (14 bits, +/-8 g, 1 mg/LSB) to 16 bits in order to obtain 0,24 mg/LSB and see: a) what happens with signal to noise ratio in our specific application; b) how about those 20.000 pieces and their lead time until NXP issues a new 14 bit+, +/-2g, in full production.

Any way I think MMA8491Q might surely result in an acceptable provisional replacement for many FXLS8471 users

Regards!

[JozefKozon]

Hi Adelon,

a) what happens with signal to noise ratio in our specific application;

[A] The signal to noise ratio will be about four times worse, than the FXLS8471 14 bit+, +/-2g accelerometer you have used before. I presume you will use only +/-2g from the +/-8g span and the resolution is for the full +/-8g span. Unfortunately in the MMA8491Q maximum g span cannot be changed. I apologize for inconvenience and that we cannot offer you a better solution.

b) how about those 20.000 pieces and their lead time until NXP issues a new 14 bit+, +/-2g, in full production.

[A] The Chiron with 14-bit resolution is only planned, but is not approved yet. Currently we don't know if the Chiron or any other accelerometer will have +/-2g span and when there will be a new 14 bit+, +/-2g, in full production. I apologize for inconvenience. 

With Best Regards,

Jozef

[adeleon71]

Thank you Jozef for your answer. 
I have studied those alternatives you suggested. However I can not find any of them to be purchasable  or with a certain delivery lead time. 

Can you please help with some commercial part number of those "Chiron-NPI" line of 14 bit accelerometers?

[JozefKozon]

Hi Adelon,

it is unfortunate situation right now. Although we have replacements for the discontinued parts, the factories are not able to product enough chips to cover the demand. I apologize for inconvenience. 

Regarding the Chiron accelerometer, you need to contact your local NXP Authorized distributor directly (https://www.nxp.com/support/sample-buy/distributor-network:DISTRIBUTORS).

With Best Regards,

Jozef