opa548 lm675

mario soccini

Intellectual 730 points

Other Parts Discussed in Thread: OPA548, LM675, OPA564

i SIMULATED THE CIRCUIT IN ATTACHED.

IT'S OK IT WORKS AROUND 12V.

BUT OPA548 IS VERY EXPENSIVE.

WHAT CONMPONENT CAN I USE IN ALTERNATIVE ?

LM675 IS CHEAPER BUT THE GAIN MUST BE AT LEAST 10, I CANNOT FIND A SOLUTION.

THANKS.

MARIO

over 11 years ago

0 Andy Liu (BMS) over 11 years ago

TI__Guru 52115 points

Hi Mario,

Both OPA548 and LM675 belong to precision amplifier, so I will ask some one from precision amplifier to answer this question.

Andy

0 John Caldwell over 11 years ago

TI__Genius 12375 points

Hi Mario,

Do you have any other information on your application? What bandwidth signals are you trying to deliver to your load?

0 mario soccini over 11 years ago in reply to John Caldwell

Intellectual 730 points

Hi John.

I have 2 case:

1 1Arms with 5kHz (C resosant is 10uf)

2 0.2Arms with 50kHz (C resonat is 100nf)

I have already simulated by tina the circuit: is ok

The problem is the cost of OPA548....

Also can you tell me if the OPA548 and LM675 are UL marked ?

thanks in advance.

Mario.

0 John Caldwell over 11 years ago in reply to mario soccini

TI__Genius 12375 points

Op Amps are not UL marked. UL testing is system-level, not component level. It is the responsibility of the circuit/system developer to have their specific product UL tested.

The OPA564 is a lower cost option to the OPA548 able to source 1.5A peak.

0 mario soccini over 11 years ago in reply to mario soccini

Intellectual 730 points

Hi John.

In resonance condition what will the amplifier be required to dissipate ?

is 24*1 (power from 24V) - 5 (load power) ? 19 W ?

it works around 12V point rest.

Thanks.

Mario.

Amplifiers

Amplifiers forum

opa548 lm675