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ADE7752B датащи(PDF) 16 Page - Analog Devices

номер детали ADE7752B
подробное описание детали  3-Phase, 3-Wire, and 4-Wire Energy Metering IC with Pulse Output
PDF  24 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADE7752B датащи(HTML) 16 Page - Analog Devices

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ADE7752B
Rev. 0 | Page 16 of 24
POWER SUPPLY MONITOR
The ADE7752B 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 ADE7752B 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.
VDD
VREF
5V
4V
0V
INTERNAL
RESET
ACTIVE
INACTIVE
2.4V
1.9V
INACTIVE
Figure 19. On-Chip Power Supply Monitor



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