DAC81408: Temperature sensor

Jacek Batkowski

Part Number: DAC81408

What is the max output current and impedance of the sensor output. I've had a couple of board with output set to approx. 5V. Is there any reason they could be damaged or there is something in the part configuration?

over 5 years ago

0 Akhilesh K over 5 years ago

TI__Mastermind 19086 points

Hi Batkowski,

Since this parameter which is not characterized, I need to check with my design team for the info.

please wait for one day, I will revert back to you with the information.

Regards,

0 Akhilesh K over 5 years ago in reply to Akhilesh K

TI__Mastermind 19086 points

Hi Batkowski,

Temp sensor output is not meant to be loaded, it has only capability of 100uA . Regarding output impedance,there is a mux in the path which will dictate the dc o/p impedance. The dc impedance has a variation of 420 ohms to 610 ohms. Typically it would be around 500 ohms.

Hope this clarifies.

Regards,

0 Jacek Batkowski over 5 years ago in reply to Akhilesh K

Prodigy 20 points

Hi Akhilesh

I have one more question. You mentioned there's a mux in the path. Is there any possibility of controlling the mux? I have two boards with the sensor output at 5V (output floating no load). So either they are damaged or somehow disconnected.

Regards

Jacek

0 Akhilesh K over 5 years ago in reply to Jacek Batkowski

TI__Mastermind 19086 points

Hi,

That mux is internal to device, user dont have choice to control the same. at room temp you should have 1.2- 1.3V at that pin and DAC outputs are at no load.

Regards,

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DAC81408: Temperature sensor