ADE7752*

Features:

High Accuracy, Supports 50 Hz/60 Hz IEC 687/1036 Less than 0.1% Error Over a Dynamic Range of 500 to 1
Compatible with 3-phase/3-wire and 3-phase/4-wire configurations
The ADE7752 Supplies Average Real Power on the Frequency Outputs F1 and F2
The High Frequency Output CF Is Intended for Calibration and Supplies  Instantaneous Real Power
The Logic Output REVP indicates a Potential Miswiring or Negative Power for each phase
Direct Drive for Electromechanical Counters and Two Phase Stepper Motors (F1 and F2)
Proprietary ADCs and DSP Provide High Accuracy over
Large Variations in Environmental Conditions and Time
On-Chip Power Supply Monitoring
On-Chip Creep Protection (No Load Threshold)
On-Chip Reference 2.5 V ± 8% (30 ppm/8C Typical) with External Overdrive Capability
Single 5 V Supply, Low Power (15 mW Typical)
Low Cost CMOS Process

Pinout




Specifications

V_DD  to  AGND  . . . . . . . . . . . . . . . . . . . . . .   0.3 V  to  +7 V
V_DD  to  DGND . . . . . . . . . . . . . . . . . . . . . .   0.3 V  to  +7 V
Analog Input Voltage to AGND
VAP,  VBP,  VCP,  VN,  IAP,  IAN,  . . . . . . . . . . . . . . . . . .
IBP,  IBN,  ICP  and  ICN  . . . . . . . . . . . . .         6 V  to +6 V
Reference Input Voltage to AGND        0.3 V to V_DD + 0.3 V
Digital Input Voltage to DGND .            0.3 V to V_DD + 0.3 V
Digital Output Voltage  to DGND          0.3 V to V_DD + 0.3 V
Operating Temperature Range
Industrial  . . . . . . . . . . . . . . . . . . . . . . .      40°C to +85°C
Storage  Temperature  Range  . . . . . . . .  65°C to +150°C
Junction  Temperature  . . . . . . . . . . . . . . . . . . . . . . +150°C


Description

The ADE7752 is a high accuracy three phase electrical energy measurement IC. The part specifications surpass the accuracy requirements as quoted in the IEC1036 standard. The only analog circuitry used in the ADE7752 is in the ADCs and reference circuit. All other signal processing (e.g., multiplication, filtering and summation) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time.

The ADE7752 supplies average real power information on the low frequency outputs F1 and F2. These logic outputs may be used to directly drive an electromechanical counter or interface with an MCU. The CF logic output gives instantaneous real power information. This output is intended to be used for calibration purposes, or as interface with an MCU. The ADE7752 includes a power supply monitoring circuit on the AVDD supply pin. The ADE7752 will remain inactive until the supply voltage on VDD reaches 4 V. If the supply falls below 4 V, the ADE7752 will also be reset and no pulses will be issued on F1, F2 and CF. Internal phase matching circuitry ensures that the voltage and current channels are phase matched. An internal no-load threshold ensures that the ADE7752 does not exhibit any creep when there is no load. The ADE7752 is available in 24-lead SOIC packages.