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ADE7762
POWER SUPPLY MONITOR
The ADE7762 contains an on-chip power supply monitor. The
power supply (V DD ) is monitored continuously. At power-up,
when the supply is less than 4 V ± 2% and V REF is less than 1.9 V
(typical), the outputs of the ADE7762 are inactive and the data
path is held in reset. Once VDD is greater than 4 V ±2% and
VREF is greater than 1.9 V (typical), the chip is active and energy
accumulation begins. At power-down, when VDD falls below
4 V or V REF falls below 1.9 V (typical), the data path is again held
in reset. This implementation ensures correct device operation
at power-up and at power-down. The power supply monitor
5V
4V
2.4V
1.9V
0V
V DD
V REF
has built-in hysteresis and filtering. This gives a high degree of
immunity to false triggering due to noisy supplies.
INTERNAL
RESET
INACTIVE
ACTIVE
INACTIVE
The power supply and decoupling for the part should be such
that the ripple at V DD does not exceed ±5% as specified for
normal operation.
Rev. 0 | Page 17 of 28
Figure 20. On-Chip Power Supply Monitor
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