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ADE7758
GENERAL DESCRIPTION
The ADE7758 has a waveform sample register that allows access
to the ADC outputs. The part also incorporates a detection
circuit for short duration low or high voltage variations. The
voltage threshold levels and the duration (number of half-line
cycles) of the variation are user programmable. A zero-crossing
detection is synchronized with the zero-crossing point of the
Data Sheet
Data is read from the ADE7758 via the SPI serial interface. The
interrupt request output (IRQ) is an open-drain, active low logic
output. The IRQ output goes active low when one or more
interrupt events have occurred in the ADE7758 . A status register
indicates the nature of the interrupt. The ADE7758 is available
in a 24-lead SOIC package.
line voltage of any of the three phases. This information can be
used to measure the period of any one of the three voltage
inputs. The zero-crossing detection is used inside the chip for
the line cycle energy accumulation mode. This mode permits
faster and more accurate calibration by synchronizing the
energy accumulation with an integer number of line cycles.
Rev. E | Page 4 of 72
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