ADE7762ARWZ-RL(Rev0) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADE7762ARWZ-RL
(Rev.:Rev0)

Polyphase Energy Metering IC with Phase Drop Indication

Analog Devices 

POWER SUPPLY MONITOR

The ADE7762 contains an on-chip power supply monitor. The

power supply (VDD) is monitored continuously. At power-up,

when the supply is less than 4 V ± 2% and VREF 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 VREF 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

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 VDD does not exceed ±5% as specified for

normal operation.

ADE7762

5V

4V

2.4V

1.9V

0V

VDD

VREF

INTERNAL

RESET

INACTIVE

ACTIVE

INACTIVE

Figure 20. On-Chip Power Supply Monitor

Rev. 0 | Page 17 of 28

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