运算放大器规格怎么样

大家好，希望有人能给我指点！我正在尝试一个16F1779的OPA模块，我以前使用了几个解压部件和一个TL002给一个机载比较器做了RFID阅读器，所有的工作都很好，直到我意识到我在使用TL0852的规格（5V电源！）我认为把所有的东西都放在一个芯片上就好了，于是就去了16F1779，我可以看到范围内的信号，但是我在读取它时遇到了真正的问题，它不像TL082的输出那样“稳定”。车载的AMP是否足够好？OPA模块的增益带宽为3.5 MHz（未测试）？这是什么意思？TL085是4兆赫，输入偏移比TL002还要高一点。我对模拟东西很陌生，这真的让我撕开了头发。我猜我要问的是我应该坚持OPA模块还是只使用5V电源轨到轨道上的安培在我的桌子上。欢呼杰夫



      以下为原文

    Hi all,
Hope someone can advise me!
I'm trying out the opa module on a 16f1779, I had previously made a RFID reader by using a few descrete components and a tl082 feeding a onboard comparator, all worked nicely until I realized I was using the tl082 out of spec (5v supply!).

I thought it would be nice to get everything on one chip so went for the 16f1779, I can see the signal on the scope but am having real problems reading it, its not as 'steady' as the tl082's output.

Are the op amps onboard good enough? The gain bandwidth of the opa module is 3.5 MHz (not tested?!) What does that mean? The tl082 is 4 Mhz The input offset is quite a bit higher than the tl082 as well.

I'm quite new to analog stuff and this has really got me tearing out the hair.

I guess what I'm asking is should I persevere with the opa module or just use the 5v supply rail to rail op amps that are sat on my desk!

Cheers Geoff