Mickey,
The lowest (1ku) price op amp that has input rail to rail, similar performance, and same pinout is the LMV611
The schematic on page 16 of data sheet shows the reason why.
First stage is difference PNP which cuts off then second stage which is…
Nikhil,
I would suggest a simple voltage divider to a unity gain rail to rail op amp powered by 3V.
Add a diode from op amp input to 3V rail for over voltage protection.
Lowest cost 1ku price goes to LMV611 family
Other Parts Discussed in Thread: LMV611 , OPA544 , LM675 , LM386 Hi
I am trying to use lmv611 in order to generate wave generator.
I am building simple wein bridge (see below) where: r1=r2=160k, c1=c2=100n rf=20k rb=10k (f=~10hz).
1. without a load I get…
