op484 is getting heated

Question

I am using OP484 as an inverting amplifier . 
 But as soon as i powered up my board all OP484 start heating to very high temperature.. 
 i have attached my schematic . 
 Please tell what is wrong in that. 
 There are no floating pin i have connected sensor output to all inverting inputs.

FormerMember · Accepted Answer

-- You have no voltage readings?? 
 -- Lots of Rfeedback resistors are 1k, too low. Double it to 2k and 3k to 6k. 
 -- Use next generation ADA4084-4; lower supply current. 
 -- Several op amps, such as U14B U14D have outputs shorted together. What do you want to do? 
 Harry

FormerMember · Answer

If you want to invert the output of the first op amp, then for the second op amp, you have to ground 
 the non-inverting input and have a 5k input resistor and a 5k feedback resistor. Sorry, you have 
 to spin your board. 
 Also, for precision signal chains, I would use two duals (ADA4084-2) instead of a quad: 
 Planet Analog - Harry Holt - Op amps: to dual or not to dual? (Part 1 of 2) 
 Planet Analog - Harry Holt - Op amps: to dual or not to dual? (Part 2 of 2) 
 Harry

FormerMember · Answer

Nothing obvious. 
 Also read MT-032 to MT-060 at www.analog.com 
 Harry

EZAdministrator · Answer

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