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Product Detailed Parameters
- Description：ENERGY METERING IC
- Series：AD7751
- Mfr：Analog Devices Inc.
- Package：Bulk
- Input Impedance：400kOhm
- Measurement Error：0.10%
- Voltage - I/O High：2.4V, 4.5V
- Voltage - I/O Low：0.8V, 0.5V
- Current - Supply：2mA
- Voltage - Supply：4.5 V ~ 5.5 V
- Meter Type：Single Phase
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：24-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：24-SSOP
- Grade：-
- Qualification：-
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Overview
The AD7751ARS is a high-accuracy, fault-tolerant electrical energy measurement integrated circuit designed for two-wire distribution systems. It features a single 5 V supply and low power consumption of 15 mW typical. The device includes on-chip power supply monitoring, creep protection, and a 2.5 V reference with external overdrive capability. It supports direct drive for electromechanical counters and two-phase stepper motors via frequency outputs.
Feature Summary
- High accuracy supporting IEC 687/1036 standards with less than 0.1% error over a dynamic range of 500 to 1
- Continuous monitoring of phase and neutral currents enables fault detection in two-wire distribution systems
- Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time
Applications
- Two-wire distribution system energy metering
- Electromechanical counter direct drive
- Two-phase stepper motor control
Procurement Notes
Verify the specific suffix against official Analog Devices documentation to confirm package type and temperature grade. Ensure compatibility with existing board layouts and voltage requirements before procurement. Confirm availability status through authorized distributors as lead times may vary.
Selection Notes
Select this component for applications requiring high-accuracy energy measurement in two-wire systems. Consider its fault tolerance and ability to bill using the larger of phase or neutral currents during fault conditions. Evaluate the need for direct drive capabilities for mechanical counters versus digital interfaces.
Part Context
The AD7751 belongs to Analog Devices' specialized energy metering IC family. It is engineered to surpass IEC1036 accuracy requirements. The device integrates signal conditioning, analog-to-digital conversion, and digital signal processing on a single CMOS chip.
FAQ
How does the AD7751 handle billing during a fault condition?
The device uses the larger of the two currents (phase or neutral) to bill, even during a fault condition.
What standards does the AD7751 support?
It supports IEC 687/1036 standards with high accuracy.
