8.2.1.3 Application Curves

The following figures show oscilloscope captures of the LOG200 output as the device responds to one-decade

shifts in the input current. Rising and falling steps between 10 nA and 100 nA, and between 10 µA and 100 µA,

were recorded. The oscilloscope was set to use the ac-coupled path.

For the current steps between 10 nA and 100 nA, a 10-mA laser diode bias was used. A rise time of

approximately 268 ns and a fall time of approximately 626 ns were observed.

Figure 8-6. Oscilloscope Capture of a 10

‑nA to

100

‑nA Current Step

Figure 8-7. Oscilloscope Capture of a 100

‑nA to

10

‑nA Current Step

For the current steps between 10 µA and 100 µA, a 13

‑mA laser diode bias was used. A rise time of

approximately 45.60 ns and a fall time of approximately 55.60 ns were observed.

Figure 8-8. Oscilloscope Capture of a 10

‑µA to

100

‑µA Current Step

Figure 8-9. Oscilloscope Capture of a 100

‑µA to

10

‑µA Current Step

LOG200

SBOSA28 – AUGUST 2023

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