OPT101: The pulse width of output

Ives Li

Expert 6440 points

Part Number: OPT101

Hi team,

My customer is testing OPT101, and they have some questions for TI.

For this diagram:

- Yellow signal is the waveform of detected optical signal, f = 10kHz, pulse width = 3us.

- Blue signal is the waveform from OPT101

The question is:

1. Compared to detected optical signal, the signal from OPT101has about 40us pulse width spread, is it the characteristic of OPT101? Could you help to explain it more detailly?

2. Whether we have IC of the same function as OPT101 is recommended with more than 1MHz Bandwidth?

Thanks!

Ives Li

over 2 years ago

0 Brent Elliott over 2 years ago

TI__Expert 6800 points

Hi Ives,

I will look at this and get you a reply early next week.

Thank you,

Brent Elliott

0 Ives Li over 2 years ago in reply to Brent Elliott

TI__Expert 6440 points

Any update about this?

0 Brent Elliott over 2 years ago in reply to Ives Li

TI__Expert 6800 points

Hi Ives,

Below is the frequency response of the device.

Since the rise/fall time is 28us, it makes sense that the pulse width of the signal is longer than the actual optical signal. There is also some clipping on that signal that may be hiding some of the behavior too.

We do not have an IC similar in function to the OPT101 that has higher bandwidth.

Thank you,

Brent Elliott

Sensors

Sensors forum

OPT101: The pulse width of output