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发表于 2013-6-4 09:20
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来自 四川省成都市
因为这是一个纯运放的放大器,所以尝试翻一翻作者对一些运放的点评,来和大家讨论。
BB OPA627 也许就是运放里的布加迪。威龙 和布加迪威龙一样,它们的指标都是最好的。同威龙一样,你无法总是发挥它的最好性能,除非在赛道上。Ferdinand Piech和他的公司通过布加迪。威龙而胜其它公司一筹,BB 的OPA627也是如此。
一般来说,选择OPA627就好比把毛巾放在健身房更衣室一样自然。
对于你付出的24美元,TI提供给你了如此快速的运放,它们达到更宽的亚摆。
但是与威龙不一样,opa627没有内置稳定控制,性能发挥完全取决于设计师的能力。因为 55V/uS的转换率,OPA627需要非常认真去考虑PCB布局,旁路供电,降低寄生电感和电容, 以及输出阻抗,一般来说如果你只是在普通路上跑一跑,例如 耳机,它价格过高了,而且带来的麻烦超过了价值。
原文:
• OPA627 – The Burr Brown/TI OPA627 might be the Bugatti Veyron of op amps as both offer some of the best performance numbers around. But, just like it’s pretty much impossible to explore the Veyron’s full performance anywhere but on a race track, the same is true with the OPA627. Ferdinand Pi**35;ch was playing corporate one-upmanship with the Veyron, and Burr Brown did the same with the OPA627. Basically it’s the op amp of choice for those who keep their towels on in the gym locker room. In exchange for your $24, TI gives you a stereo pair of op amps so quick they can easily go sideways. Unlike the Veyron, there’s no built-in stability control—that’s up to the designer to get right. With a slew rate of 55 V/uS, the OPA627 demands very careful attention to PC board layout, power supply bypassing, parasitic inductances and capacitances, and reactive loads on the output. Basically if you’re only going to drive on public roads in traffic--i.e. headphone audio applications--it’s expensive overkill and more trouble than it’s worth.
因为我不是英语专业,也没模电背景,所以翻译的可能偏生硬。希望高手指教。 |
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