F4 Maximum DAC update rate

[michalt]

Posted on September 09, 2016 at 09:55

Hello. Do you know what is a maximum DAC update rate for F446RE?

[slimen]

Posted on September 09, 2016 at 11:07

Hi,

Max DAC Update rate is 1Msps, this is mentioned in the 

http://www.st.com/content/ccc/resource/technical/document/datasheet/65/cb/75/50/53/d6/48/24/DM00141306.pdf/files/DM00141306.pdf/jcr:content/translations/en.DM00141306.pdf

 (page 150).

Regards

[mark239955_stm1]

Posted on September 09, 2016 at 13:04

For that 1Msps speed, the datasheet also notes ''Max frequency for a correct DAC_OUT change when small variation in the input code (from code i to i+1LSB)''

Previous versions of the datasheet used to quote the maximum DAC sample rate as 300ksps, but my observations of the (F407) DAC were that it is more a question of the maximum slew rate that the DAC can achieve; iirc it appeared to be around 1V/us.