ADAU1787 can I have the PLL in power-down mode if PLL_BYPASS=1?
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I plan to bring in my own 24.576MHz MCLK to the ADAU1787and I see in the PLL_MB_PGA_PWR register a PLL_EN bit for PLL power.
If I have the PLL_BYPASS=1, do I still have to enable PLL power?
Thanks,
Dan
ADAU1787
Integrated/Special Purpose A/D Converters
pll
Audio CODECs
Hi Dan,
If bypassing the PLL, the PLL does not need to be enabled.
In case of using an external clock source with XTAL_MODE = 0 and PLL_BYPASS = 1,
power consumption can be lowered with PLL_EN = 0 (AVDD current reduces from 3.139mA to 2.86mA).
Disabling the PLL allows us to avoid unnecessary power consumption in the PLL.
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