Amplifiers

Amplifiers forum

State TI Thinks Resolved
Locked Locked
Replies 4 replies
Answers 2 answers
Subscribers 47 subscribers
Views 425 views
Users 0 members are here

Support feedback

Options

Options

Related

OPA187: Looking for some missing information

Cedrick

Expert 8270 points

Part Number: OPA187

Hi,

Good day.

Our customer is looking for the following information for OPA187IDBV:

Need value of large signal voltage gain
Need value of closed loop output Impedance
Need value of supply current per Amplifier
Need value of Phase margin

Can you please help us provide these details? Thank you.

Thank you.

Regards,

Cedrick

over 4 years ago

0 Raymond Zhang1 over 4 years ago

TI__Guru* 77501 points

Hi Cedrick,

Please see the reply below. Please see the captured image.

Need value of large signal voltage gain
Need value of supply current per Amplifier

Need value of closed loop output Impedance: The closed loop output impedance is approx. -28dB or 40mΩ @1kHz (10^(-28/20)). 5238.OPA350 output impedance 01152021.TSC
Need value of Phase margin: Assumed OPA187 is in buffer configuration: The phase margin is approx 76 degree with BW at approx. 597kHz in simulation. The published datasheet is at 550kHz as a typical figure.

If you have additional questions, please let us know.

Best,

Raymond

0 Cedrick over 4 years ago in reply to Raymond Zhang1

TI__Expert 8270 points

Hi Raymond,

Thank you so much for the detailed information.

They also requested for the following info:

Output voltage High
Output voltage Low

Can you pleas help us further? Thank you.

Regards,

Cedrick

0 Raymond Zhang1 over 4 years ago in reply to Cedrick

TI__Guru* 77501 points

Hi Cedrick,

Enclosed are the information you requested.

The output voltage high and low depend on the load current, see the captured plot. OPA187 is considered RRO, but not the RRI input.

If you have additional questions, please let us know.

Best,

Raymond

0 Raymond Zhang1 over 4 years ago in reply to Raymond Zhang1

TI__Guru* 77501 points

Hi Cedrick,

I am going to close this inquiry. If you have additional questions, you may re-open the thread or create a new one via E2E.

Best,

Raymond