The ADE7912/AD7913 are isolated, 3-channel Σ-Δ ADCs for polyphase energy metering applications using shunt current sensors. Data and power isolation are based on the Analog Devices, Inc., iCoupler® technology. The ADE7912 features two 24-bit ADCs, and the ADE7913 features three ADCs. The current ADC provides a 67 dB signal-to-noise ratio over a 3 kHz signal bandwidth, whereas the voltage ADCs provide a SNR of 72 dB over the same bandwidth. One channel is dedicated to measuring the voltage across a shunt when the shunt is used for current sensing. Up to two additional channels are dedicated to measuring voltages, which are usually sensed using resistor dividers. One voltage channel can be used to measure the temperature of the die via an internal sensor. The ADE7913 includes three channels: one current and two voltage channels. The ADE7912 has one voltage channel but is otherwise identical to the ADE7913

APPLICATIONS

• Shunt based polyphase meters
• Power quality monitoring
• Solar inverters
• Process monitoring
• Protective devices
• Isolated sensor interfaces
• Industrial PLCs

FEATURES AND BENEFITS

• Two or Three 24-bit Isolated, Σ-Δ analog-to-digital converters (simultaneously sampling ADCs)
• Integrated isoPower, isolated dc-to-dc converter
• On-chip temperature sensor
• 4-wire SPI serial interface
• Up to four ADE7912/ADE7913 energy metering ICs synchronously clocked from a single crystal or an external clock
• Synchronization of multiple ADE7912/ADE7913 devices
• ±31.25 mV peak input range for current channel
• ±500 mV peak input range for voltage channels
• Reference drift: 10 ppm/°C typical

• See data sheet for additional features
  • ADE7912_7913