ADL5513 temperature compensation with a single resistor

Hi Turker, this is an older part so it's difficult to get information on it. I don't think that it's a good idea to rely on the internal resistances on the TADJ pin. You are proposing to make a resistor divider using the resistor that is tied to Vinternal combined with the internal resistor to ground in parallel with a single external resistor from Tadj to ground. My problem with this is that the internal resistances will change from part to part and over time with the semiconductor process (typical guidance is that these resistances can vary by +/-10 to +/-20 %. 

If I can get my hands on an evaluation board, I could measure the resistance from Tadj to ground. If I then measue the Tadj voltage, the resistor from from Tadj to Vinternal can be back calculated. If you have an evaluation board, you could probably get this measurement done quicker than I can. I would then recommend setting the external Tadj resistors to be an order of magnitude lower than the internal values. This will reduce the sensitivity of  the Tadj  voltage setting to the variances in the internal resistors. - Eamon 

Hi Turker, this is an older part so it's difficult to get information on it. I don't think that it's a good idea to rely on the internal resistances on the TADJ pin. You are proposing to make a resistor divider using the resistor that is tied to Vinternal combined with the internal resistor to ground in parallel with a single external resistor from Tadj to ground. My problem with this is that the internal resistances will change from part to part and over time with the semiconductor process (typical guidance is that these resistances can vary by +/-10 to +/-20 %. 

If I can get my hands on an evaluation board, I could measure the resistance from Tadj to ground. If I then measue the Tadj voltage, the resistor from from Tadj to Vinternal can be back calculated. If you have an evaluation board, you could probably get this measurement done quicker than I can. I would then recommend setting the external Tadj resistors to be an order of magnitude lower than the internal values. This will reduce the sensitivity of  the Tadj  voltage setting to the variances in the internal resistors. - Eamon