Setup

• Select the Frequency range and process Corner of interest. V_SLOPE and P_INT should be automatically updated in the fields directly below, but they can be modified if necessary.
• For other than 50 ohm use, enter Z₀ in the provided field.
• A Correction factor is needed for waveforms other than purely sinusoidal. Select the type of signal to be estimated from the pulldown menu.
• If Additional gain is needed or to add your own correction factor, use the provided field. One possible source of gain is in the matching components. Click on the matching chart link to calculate a simple LC match for the AD8313. After a suitable match is found, click "Done" to close the window and enter the calculate gain in the Additional gain field.

• After the system params have been entered, the response of the AD8313 with V_SET-V_OUT shorted is shown in blue (top chart). A more steeply sloped response can be obtained by changing R_EXT or by entering the desired slope in New V_SLOPE (which will calculate the corresponding R_EXT). The new response is shown in red.

• Enter V_SET and the power threshold (P_T) will be calculated and plotted (bottom chart).

The pop-up matching feature of this tool is currently incompatible with Mozilla-based browsers such as Netscape 6&7 and has consequently been disabled for those browsers.

For further troubleshooting information, please visit our Interactive Tools troubleshooting page.

AD8313 Product Page

Logarithmic Amplifier Selection Table