- #1
axemaster
- 59
- 7
Hi guys, I'm currently designing a battery powered audio circuit. I've already finished all the signal processing stuff, and now I'm looking for a suitable output buffer to drive the speaker, which is about 50Ω impedance.
Some of the requirements for the op amp buffer:
- Single supply operation with Vss ≥ 3V
- Rail to rail output
- Low distortion / noise
- Unity gain stable
- Output current of at least 100mA
I have already experimented with the BUF634, and it works, but at $8 it is just too expensive. The LME49726 might be better as it's only $1.50, but I can't find a PSpice or LTSpice model for it.
So I'm hoping that someone here will either 1) know how to get the PSpice model for the LME49726, or 2) know of a better op amp.
Thanks for helping me out!
Some of the requirements for the op amp buffer:
- Single supply operation with Vss ≥ 3V
- Rail to rail output
- Low distortion / noise
- Unity gain stable
- Output current of at least 100mA
I have already experimented with the BUF634, and it works, but at $8 it is just too expensive. The LME49726 might be better as it's only $1.50, but I can't find a PSpice or LTSpice model for it.
So I'm hoping that someone here will either 1) know how to get the PSpice model for the LME49726, or 2) know of a better op amp.
Thanks for helping me out!