Are there OpAmps working under 7V ?

[malcolmthe4]

Operational amplifiers

I have to design the electronics of a model-airplane.
So I have to use LPFs ( low-pass-filters).
i think it's preferable to use OP-Amps tha capacitors-resistors only.
In the model plane i am not allowed to use voltage higher than 7 Volt.
is it possible to find an op-anplifier that works i such low voltage?

 

[analogic]

Re: Operational amplifiers

7 voltage is high. u can even find opamp works at as low as 1.8V
check Maxim, TI, ADI website
good luck

 

[yeechyan]

Operational amplifiers

What is the cutoff frequency for your filter? Quite a number of opamps has difficulties operating abouve 1MHz.

 

[zigma]

Re: Operational amplifiers

I think LM10 opamps work at 1.5V. You can get these in the national or amxim website i guess.

 

[ezt]

Re: Operational amplifiers

Hi
I agree with our friends. Some opamps can work with very lower supply voltages as the technology scales down. if you want a good book about opamps and their applications, I recommend the book by Sergio Franco. unfortunately I can't remember the exact title of the book but I think that was something like Design with Analog ICs and Operational Amplifiers.
good luck.

 

[Desert Leo]

Re: Operational amplifiers

Microchip offers free software FilterLab for calculating of active filters with Op Amp. You can use also Microchip's CMOS Op Amps for 5V single supply MCPxxx.

 

[yangxh]

Operational amplifiers

Low power means low HZ,so when you choose which chip,you may notice this.