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ADE7912ARIZ Datasheet(PDF) 1 Page - Analog Devices |
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ADE7912ARIZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 44 page 3-Channel, Isolated, Sigma-Delta ADC with SPI Data Sheet ADE7912/ADE7913 Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Two (ADE7912) or three (ADE7913) 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 4 ADE7912/ADE7913 devices 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 Single 3.3 V supply 20-lead, wide-body SOIC package with 8.3 mm creepage Operating temperature: −40°C to +85°C Safety and regulatory approvals (pending) UL recognition 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A IEC 61010-1: 400 V rms VDE certificate of conformity DIN VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 846 V peak APPLICATIONS Shunt-based polyphase meters Power quality monitoring Solar inverters Process monitoring Protective devices Isolated sensor interfaces Industrial PLCs TYPICAL APPLICATIONS CIRCUIT Figure 1. GENERAL DESCRIPTION The ADE7912/ADE79131 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. 1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329; 6,262,600; 7,489,526; 7,558,080. Other patents are pending. NEUTRAL PHASE C ISOLATION BARRIER LOAD PHASE A EARTH PHASE B PHASE A ADE7912/ ADE7913 IP IM V1P VM V2P GNDMCU GNDISO_A 3.3V PHASE B ADE7912/ ADE7913 IP IM V1P VM V2P GNDMCU GNDISO_B 3.3V PHASE C ADE7912/ ADE7913 IP IM V1P VM V2P GNDMCU GNDISO_C 3.3V NEUTRAL LINE ADE7912/ ADE7913 (OPTIONAL) IP IM V1P VM V2P GNDMCU GNDISO_N 3.3V 3.3V GNDMCU |
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