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ADSP-21489 junction tempature estimate

Question asked by on Jun 30, 2015
Latest reply on Aug 27, 2015 by Harshit.Gaharwar

Hi ADI team.

My customer is thinking to use the ADSP-21489. He wants to estimate the static current, but he doesn't estimate it because below reason.

In Data sheet, static current is written the Table 14 whose parameters is changed by junction temperature (Tj). But Tj is defined "Tj = Ta + (θja×Pd)" in Data Sheet (Pd is static current).

It is necessary to calculate Tj in order to determining the Pd. However, it is necessary to determine Pd in order to determine Tj.

How does he performed in order to obtain maximum current consumption of ADSP-21489 when VDD_INT is 1.1V.