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Procedure for grounding in AD5410

Question asked by agniteja@saitroniks.com on Jan 21, 2014
Latest reply on Jan 21, 2014 by tjohnson

Hi

I'm using single AD5410 (TSSOP package) current source dac in my application. I'm confused on how to ground the analog & digital ground in my circuit.

Problem Description:

the data sheets states two separate ground  which are as follows

pin no: 1,4,5,12 - GND - These pins must be connected to ground.

pin no : 11 - GND - Ground Reference Pin.

After going through the literature of " Grounding Data Converters and Solving the Mystery of "AGND" and "DGND" "  i understand that if there is a single converter (as in my application) i can connect the grounds at the DAC. But the data sheet doesn't say which is the AGND & Which is DGND.

This is the point at which i'm confused with how to connect the ground.

 

I'm using a 4 layer PCB in which I have a plane dedicated to ground.

It is divided into two half 1. Anglog GND 2. Digital GND both are isolated.

 

Input : 24vdc Output : 4-20mA Ground : Common Ground for both input & output.

 

Looking forward for your immediate reply

 

Thanks in advance

 

Teja

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