Datasheet

ADE7758 Data Sheet

Rev. E | Page 4 of 72

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

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.

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 . A status register

indicates the nature of the interrupt. The is available

in a 24-lead SOIC package.

ADE7758