ade7762 Analog Devices, Inc., ade7762 Datasheet - Page 17

• Manufacturer Part Number: ade7762
• Description: Polyphase Energy Metering Ic With Phase Drop Indication
• Manufacturer: Analog Devices, Inc.

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