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Re: 請問有沒有什麼OP......
#2
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因為輸入條件為0V~5V @5Vdd,所以你需要一個具有 Rail-to-Rail 輸入及輸出的 OP AMP 且具有Chip Select功能。
MCP6043 是 8-pin 的 OP AMP,工作電壓1.4V~5.5V 單電源,可以直接上 sample.microchip 申請樣品。

Data Sheet :
http://www.microchip.com/stellent/idc ... Id=1335&dDocName=en010445

The MCP6043 is a single amplifier with a chip select
(CS) option. When CS is pulled high, the supply current
drops to 20 pA (typ) and goes through the CS pin to
VSS. When this happens, the amplifier is put into a high
impedance state. By pulling CS low, the amplifier is
enabled. If the CS pin is left floating, the amplifier will
not operate properly. Figure 3-3 shows the output voltage
and supply current response to a CS pulse.

發表於: 2006/6/20 10:13
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請問有沒有什麼OP......
#1
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目前我學到的OP裡面
741是比較完整的,但是要加負偏壓
301同上,而且要外加電容
393則只能做比較器使用......

我想問一下
如果我想做類比緩衝器使用,把OP接成隨偶器的型態
然後我確定我的輸入電壓都是0-5V之間
這樣的話有沒有什麼隨偶器是只需要工作偏壓5V就可以的
不必再接負偏壓的
因為用在數位電路上,要負偏壓的話就要加滿多東西的......

&有沒有具有三態輸出的?因為我要用到類比多工器
目前我只想的到繼電器,但是好大.....

發表於: 2006/6/19 20:15
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