AD7750AR

Overview

The AD7750AR is a polyphase energy metering integrated circuit manufactured by Analog Devices. It functions as a product-to-frequency converter designed for three-phase electricity metering applications. The device integrates analog signal processing and digital conversion capabilities to measure active, reactive, and apparent power. It operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range from -40°C to +85°C. The component is housed in a 24-pin SOIC surface-mount package.

Feature Summary

• Integrates product-to-frequency conversion for direct pulse output generation
• Supports polyphase energy measurement including active and reactive power
• Includes on-chip fault detection mechanisms for system reliability

Applications

• Three-phase electricity metering systems
• Polyphase energy monitoring devices
• Industrial power quality analysis equipment

Procurement Notes

Verify the specific suffix ARZ or AR against the required RoHS compliance status and lead time constraints. Confirm that the SOIC-24 package matches the target PCB footprint. Ensure the operating temperature grade meets the environmental requirements of the final assembly. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when designing three-phase metering solutions requiring integrated fault detection and direct frequency output. Compare power consumption and accuracy specifications against alternative polyphase metering ICs. Evaluate the need for external reference components versus internal bias circuits. Consider the interface requirements for downstream microcontroller or display units connected to the frequency outputs.

Part Context

The AD7750 belongs to the AD775x series of energy metering ICs from Analog Devices. This family provides specialized analog front-end processing for utility metering applications. The AD7750 variant specifically targets polyphase configurations, distinguishing it from single-phase counterparts like the AD7750AN. It represents a dedicated solution for accurate energy measurement without complex external DSP requirements.

Replacement Considerations

The AD7751 is a documented replacement within the same series offering enhanced features. Verify pinout compatibility between the AD7750AR and potential substitute part numbers before implementation.