ADE7760

Features:

High accuracy active energy measurement IC, supports IEC 687/61036 
Less than 0.1% error over a dynamic range of 500 to 1 
Supplies active power on the frequency outputs F1 and F2 
High frequency output CF is intended for calibration and  supplies instantaneous active power 
Continuous monitoring of the phase and neutral current  allows fault detection in 2-wire distribution systems 
Current channels input level best suited for current transformer sensors 
Uses the larger of the two currents (phase or neutral) to bill-even during a fault condition 
Two logic outputs (FAULT and REVP) can be used to indicate a potential miswiring or fault condition 
Direct drive for electromechanical counters and 2-phase stepper motors (F1 and F2) 
Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time 
Reference 2.5 V ± 8% (drift 30 ppm/°C typical) with external overdrive capability 
Single 5 V supply, low power 


Pinout




Specifications

VDD to AGND                                                                  0.3 V to +7 V
Analog Input Voltage to AGND                                          6 V to +6 V
V_1AP, V_1BP, V_1N, V_2N, V_2P
Reference Input Voltage to AGND                      0.3 V to VDD + 0.3 V
Digital Input Voltage to DGND                            0.3 V to VDD + 0.3 V
Digital Output Voltage to DGND                          0.3 V to VDD + 0.3 V
Operating Temperature Range
Industrial                                                                    40°C to +85°C
Storage Temperature Range                                    65°C to +150°C 
Junction Temperature                                                                150°C 
20-Lead SSOP, Power Dissipation                                           450 mW
JA Thermal Impedance                                                         112°C/W
Lead Temperature, Soldering  
Vapor Phase (60 s)                                                                    215°C
Infrared (15 s)                                                                           220°C


Description

The ADE7760 is a high accuracy, fault tolerant, electrical energy measurement IC intended for use with 2-wire distribution systems. The part specifications surpass the accuracy requirements as quoted in the IEC61036 standard.  The only analog circuitry used on the ADE7760 is in the ADCs and reference circuit. All other signal processing (such as multiplication and filtering) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time. It incorporates a fault detection scheme similar to the ADE7751 by continuously monitoring both the phase and neutral currents. A fault is indicated when these currents differ by more than 6.25%. 

The ADE7760 supplies average active power information on the low frequency outputs F1 and F2. The CF logic output gives instantaneous active power information.  It includes a power supply monitoring circuit on the VDD supply pin. Internal phase-matching circuitry ensures  that the voltage and current channels are matched. An internal  no-load threshold ensures that the ADE7760 does not exhibit  any creep when there is no load.