Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

AD7730 not working on 3.3V DVDD supply

Status
Not open for further replies.
P

PathakS

Newbie level 3
Joined
Oct 2, 2017
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
79
Hello Everyone,
I am working on AD7730 interface with msp432p401r controller. I give AVDD=+5V,AGND=DGND=ground,DVDD=+3.3V because controller required 3.3V so no external voltage convertor circuit required.But, when i give DVDD 3.3V the voltage suddenly goes increase upto 4.5V means at DVDD pin it shows 4.5 V. why?? if supply given to DVDD is 5 v then ic work properly.plz help??
 

Hi,

I assume: wrong schematic and/or wrong layout.
Maybe a short circuit.

(like so often) Without schematic and without PCB layout it´s about impossible to help.

Klaus
 

If it's no short circuit, any of the digital logic signals might be erroneously driven with 5V level and pull-up vdd through AD7730 substrate diodes.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top