ADE7755AR

Product Summary

The ADE7755AR is pin compatible with the AD7755. The only difference between the ADE7755AR and the AD7755 is that the ADE7755AR features a synchronous CF and F1/F2 outputs under all load conditions. The ADE7755AR is a high accuracy electrical energy measurement IC. The part specifications surpass the accuracy requirements as quoted in the IEC1036 standard. See Analog Devices Application Note AN-559 for a description of an IEC1036 watt-hour meter reference design based on the AD7755. The ADE7755AR 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 to an MCU. The CF logic output gives instantaneous real power information. This output is intended to be used for calibration purposes or for interfacing to an MCU. The ADE7755AR is available in a 24-lead SSOP package.

Parametrics

ADE7755AR absolute maximum ratings: (1)AVDD to AGND: -0.3 V to +7 V; (2)DVDD to DGND: -0.3 V to +7 V; (3)DVDD to AVDD: -0.3 V to +0.3 V; (4)Analog Input Voltage to AGND; (5)V1P, V1N, V2P, and V2N: -6 V to +6 V; (6)Reference Input Voltage to AGND: -0.3 V to AVDD + 0.3 V; (7)Digital Input Voltage to DGND: -0.3 V to DVDD + 0.3 V; (8)Digital Output Voltage to DGND: -0.3 V to DVDD + 0.3 V; (9)Operating Temperature Range, Industrial: -40℃ to +85℃; (10)Storage Temperature Range: -65℃ to +150℃; (11)Junction Temperature: 150℃; (12)24-Lead SSOP, Power Dissipation: 450 mW; (13)θJA Thermal Impedance: 112℃/W; (14)Lead Temperature, Soldering, Vapor Phase (60 sec): 215℃; Infrared (15 sec): 220℃.

Features

ADE7755AR features: (1)High Accuracy, Surpasses 50 Hz/60 Hz IEC 687/1036; (2)Less than 0.1% Error over a Dynamic Range of 500 to 1; (3)The ADE7755 Supplies Average Real Power on the Frequency Outputs F1 and F2; (4)The High-Frequency Output CF Is Intended for Calibration and Supplies Instantaneous Real Power; (5)Pin Compatible with AD7755 with Synchronous CF and F1/F2 Outputs; (6)The Logic Output REVP Can Be Used to Indicate a Potential Miswiring or Negative Power; (7)Direct Drive for Electromechanical Counters and Two Phase Stepper Motors (F1 and F2); (8)A PGA in the Current Channel Allows the Use of Small Values of Shunt and Burden Resistance; (9)Proprietary ADCs and DSP Provide High Accuracy over Large Variations in Environmental Conditions and Time; (10)On-Chip Power Supply Monitoring; (11)On-Chip Creep Protection (No Load Threshold); (12)On-Chip Reference 2.5 V ± 8% (30 ppm/℃ Typical) with External Overdrive Capability; (13)Single 5 V Supply, Low Power (15 mW Typical); (14)Low Cost CMOS Process.

Diagrams