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AD5684 Power Management

Question asked by ddarko on Jan 7, 2014
Latest reply on Jan 16, 2014 by ddarko

Hello,

 

What is the Vlogic pin for in the AD5684 Digital-to-Analog Converter? The data sheet indicates it as a “Digital Power Supply”. How is this different from Vdd? I currently have Vdd connected to a 5V supply and I'm using a microcontroller powered with 3.3V. Should I connect Vlogic to the 5V or 3.3V rail?

 

Also, since I’m connecting this to a 3.3V microcontroller, the serial data will vary between 0 for low and 3.3V for high. If I use a 2.5V reference, kept GAIN at high, and connected Vdd to 5V, can I still get an output between 0 to 5V?

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