Hi Fernando,
It would of course be preferable that an ADI application engineer (or someone who has done the chip swap already) would answer this directly. In the meantime, searching the ADI website for "ADAU1401 ADAU1701" yields some references that indicate that these are indeed form, fit, and function compatible:
- This FAQ:
FAQs/RAQs | ADAU1702 | SigmaDSP Processors | Processors and DSP | Analog Devices
- This from the ADAU1401A Eval Board Manual:
The EVAL-ADAU1401AEBZ can also be used for evaluation of
the pin-compatible ADAU1701 and ADAU1702 SigmaDSP®s.
The differences between the ADAU1401A, ADAU1401,
ADAU1701, and ADAU1702 are:
• The ADAU1701, ADAU1401A, and ADAU1401 have 1024
program RAM locations, while the ADAU1702 has 512
program RAM locations.
• The ADAU1701 has 2k words of data memory, while the
ADAU1702 has 0.5k words of data memory.
Semi manufacturers often produce two or more temperature grades of what amounts to the same chip. In some cases (not necessarily here), chips coming out of the fab are tested, then those that work over the wider temperature range are chosen for that model number.
Best regards,
Bob