32MHz & 32.768KHz Crystal Part Number

[Afzal]

Dear Team,

Please help us to confirm the part number of the 32MHz & 32.768KHz Crystal part Number-
1. As per the mentioned parameter of the 32MHz Cryatal in the BOM file of NRF52833 
-XTAL SMD 2016, 32MHz, Cl=8pF, Total Tol: ±40ppm Please confirm the Tolerance and ESR value as well.


2. As per the mentioned parameter of the 32.768KHz Cryatal in the BOM file of NRF52833 
  -XTAL SMD 3215, 32.768kHz, Cl=9pF, Total Tol: ±50ppm .

 -Please confirm if it is ok if we use XTAL-3215-32.768K-9pF-20ppm crystal it is in our Stock. Please confirm the tolerance will be ok for it.


Please let me know if there is any query.

ATLANTA SYS
Regards,
Syed Afzal
Hardware Design Engineer 
7503601370
  

[haakonsh]

Hey Syed,

I don't know what crystals you are referring to, can you share the manufacturer part numbers for the two crystals you want to use?

You can also double-check their specs with our crystal oscillator el-specs; 64 MHz crystal oscillator (HFXO), and Low frequency crystal oscillator (LFXO). 

BR,
Håkon Holdhus

[Afzal]

Hello Hakon,

Thanks for your reply.

Please clear up my query about the selection of both crystals (32MHz & 32.768KHz) for nRF52833.
1. As per the defined parameter of the 32MHz Crystal in the BOM file of nrf52833 is XTAL SMD 2016, 32MHz, Cl=8pF, Total Tol: ±40ppm. in this please clear the tolerance level which is better for the design. As per my knowledge if we select the low tolerance 10 to 30 ppm will be better please correct me if I am wrong.

2. As per the defined parameter of the 32.768KHz Crystal(which is used for the BLE) is XTAL SMD 3215, 32.768kHz, Cl=9pF, Total Tol: ±50ppm but I am having the same different in Tolerance i.e. +-20ppm. Please let me know if it will be ok if we use the 20ppm Tolerance.

Please feel free to contact me in case of any queries.

ATLANTA
Regards,
Syed Afzal
Hardware Design Engineer 
7503601370

[Afzal]

Dear Haakonsh,

Good Day!

Apart from this, please check if the XRCGB32M000F1S2AR0(XTAL SMD 2016, 32MHz, Cl=8pF, Total Tol +-20ppm, ESR 50ohms, Temp -40' to 105'C) Part number is suitable or not.
These are the parameter of this part.



ATLANTA
Regards,
Syed Afzal
Hardware Design Engineer 
7503601370

[haakonsh]

Hey Sayed,

I believe the XRCGB32M000F1S2AR0 will be suitable. 

I assumed that the rated 'max drive level' of the crystal must be below or equal to our oscillator's rated 'max drive level'. ( 'max drive level' <= 100uW)

I now believe that i was wrong and that the crystal's rated 'max drive level' must be above or equal to our oscillator's rated 'max drive level'. ( 'max drive level' >= 100uW) 

BR,
Håkon.

[Afzal]

Hello Hakon,

Thanks for your resposne.

[Afzal]

Hello Hakon,

Good Day!
We really appreciate your support.

Please help us to confirm the suggested part from our Crystal Vendor XTAL2016-32M-8P-1020-HT datasheet also attached below. As I can see the parameter almost meet your suggested part. 

Sorry for the inconvenience. Please help us with the same.


Please let me know if there are any queries.

Thanks & Regard
Syed Afzal

Hardware Design Engineer 
Atlanta Systems Pvt. Ltd
M-135 2nd Floor, Connaught Place
New Delhi-110001

Mob- [phone] |  http://www.atlantasys.com
XTAL2016-32M-8P-1020-HT.pdf

[haakonsh]

Hey Syed,

-Edit:
If the 'Effective Resistance' characteristic with the value ' ≤ 5 0' in unit of Ohm, actually means <= 50 Ohms. Then I think this crystal is within our specs. 

BR,
Håkon Holdhus.

[Afzal]

Hello Hakon,

Good Day!
We are really grateful for your support.

Thanks & Regard
Syed Afzal

Hardware Design Engineer 
Atlanta Systems Pvt. Ltd
M-135 2nd Floor, Connaught Place
New Delhi-110001

Mob- [phone] |  http://www.atlantasys.com

[haakonsh]

I edited my last reply, you might not have seen it, so I advice that you check it again :)