Hi,
I am facing a strange problem.
When I write DACR =0 (bit 6 to 15), the value at analogue out is not 0.
The analogue out pin shows a 10 to 20 mV.
The measurement is done with precision mil voltmeter.
How ever when I put 50% count ( 512) in DACR the value is exactly 1.25V
I am using precision voltage source of 2.5 volt for reference voltage.

Any idea what could be wrong?
Warm Regards,
Mukund Deshmukh,
Beta Computronics Pvt Ltd,
10/1 IT Park, Parsodi,
Nagpur -440022, India. Start a New Thread

Maybe nothing. I was curious so I checked the data sheet and there is no
data on the D/A. That may be within the range of offsets on the D/A.

You could try placing a unity gain buffer after the D/A to reduce
loading. You should probably feed it off of a bipolar supply in that case
though.

Without NXP actually characterizing the D/A you are pretty much on your own
I'm afraid. NXP really needs to step up here and document the device properly.

Robert

http://www.aeolusdevelopment.com/

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