Part Number:OPA2990
请教一下。
运放的参数都是在一定的测试 条件下测得的,比如OPA2990的测试条件为: at TA = 25°C, VS = ±20 V, VCM = VS / 2, RLOAD = 10 kΩ connected to VS / 2, and CL = 10 pF
请问:
- 如何实现VCM = VS / 2,
- 如何实现RLOAD = 10 kΩ connected to VS / 2,
请问能帮忙画出对应的测试电路图吗?
Amy Luo:
您好,
VCM是输入共模电压,在双电源供电时,比如这里的 VS = ±20 V,VCM = VS / 2,那就是0V;RLOAD = 10 kΩ connected to VS / 2,这里也是10KΩ电阻接地;如下接线示意图: