久芯网

OPA187: the output resistance Rout

avatar jinyan ma 提问时间: 2023-10-12 13:00:49 / 已解决
Part Number: OPA187
Other Parts Discussed in Thread: OPA350

Hi :

 I want to know when I use the OPA187 as a buffer , what is the maximum value of the output resistance Rout .

I'm  looking forward for  your reply.

thanks and best regards

Kim


如需获得 OPA187 等器件的更多信息,请点击链接或 点击此处 联系在线客服!

1个回答
  • avatar Kailyn Chen
    回答时间: 2023-10-12 13:27:22

    Hello, we could refer to the OPA350 output impedance test model like this to simulate the OPA187 output impedance with TINA:

    https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/971211/opa350-output-impedance-stability-and-ref5030-buffering/3588400#3588400

    So the OPA187 output impedance which is used buffer is simulated as following( The current generator is +-1A sine wave):

    The gain is about -28dB with 1K frequency, so the closed loop output impedance is approx. -28dB or 40mΩ, 20 (10^(-28/20)) is about 40mohm.    

    Hope it is useful for you. 

会员中心 微信客服
客服
回到顶部