DA7218 Operating Conditions - inconsistency between datasheet and EVM

5 posts / 0 new
Last post
itsonlyaudio
Offline
Last seen: 6 months 4 days ago
Joined: 2019-03-21 12:54
DA7218 Operating Conditions - inconsistency between datasheet and EVM

Hi,

In designing a board and setting up my power structure I'm puzzled by conflicting requirements on my rails. The datasheet has Absolute Maximum Ratings but the silkscreening on the EVM has very different labels on the banana sockets that as far as I can see go straight (OK, through a 0.2R sense resistor) to the device pins.

 

Datasheet

VDD :: -0.3 .. +2.75V

VDD_IO :: -0.3 .. +5.5V

VDD_MIC :: -0.3 .. +5.5V

 

EVM

VDD :: 1V8 .. 3V6

VDD_IO :: 1V6 .. 3V6

VDD_MIC :: 1V8 .. 2V5

 

I am very confused dot com.

Could I get an authorative answer on the range and limits of the 7218 supplies? I would prefer not to spend another board revision on ambiguity.

 

Ta,

/ Remco

 

(also: why is there no Device Entry on this forum for the 7218?)

Device: 
bmcadam
Offline
Last seen: 1 month 3 days ago
Staff
Joined: 2015-09-16 16:25
Hello,

Hello,

The datasheet values you have stated are the Absolute maximum ratings and the evaluation board have the markings for the common operating conditions.

If you refer to table 6 of the datasheet this will give you the recommended operating conditions.

Best Regards.

itsonlyaudio
Offline
Last seen: 6 months 4 days ago
Joined: 2019-03-21 12:54
I'm sorry but that is

I'm sorry but that is slightly nonsensical. So the Abs Max Rating for VDD is 2.65V but the common operating range is up to 3V6?

So that means if I feed VDD 3.3V as I did intially and the device fails, you'll replace it?

ED_Dialog
Offline
Last seen: 2 days 7 hours ago
Staff
Joined: 2017-09-18 11:54
Hello,

Hello,

The performance board has an incorrect label. The input for VDD as stated on the performance is the VDD_MIC input. The VDD_MIC input as stated on the performance board is the VDD input. We apologise for the inconvenience.

Kind regards,
Elliott Dexter

itsonlyaudio
Offline
Last seen: 6 months 4 days ago
Joined: 2019-03-21 12:54
Thank you Elliott.

Thank you Elliott.