The SDI7768 is a single‑phase multifunction anti‑theft metering chip that measures active and reactive power, offers dual power‑measurement channels…
The SDI7768 chip provides comprehensive metering functions for single‑phase anti‑theft applications. It measures active power, reactive power, and various energy quantities while delivering two independent power‑measurement channels and RMS voltage measurement. The device supports full‑digital gain, phase and offset calibration and offers both SPI and RSIO serial interfaces for communication with external MCUs.
Key features include a typical power consumption of 32 mW, an internal 2.5 V±3 % reference, SSOP‑24 package, and built‑in power‑monitoring circuitry that resets the chip when AVDD falls below 4 V and enables normal operation above 4.3 V. The datasheet details pin assignments, electrical limits, and typical application circuits for anti‑theft metering. This manual is written in Chinese.
| Active power measurement error | ±0.1 % (1500:1 dynamic range) |
|---|---|
| Reactive power measurement error | ±0.1 % (1500:1 dynamic range) |
| RMS measurement error | ±0.5 % (400:1 dynamic range) |
| Supply voltage range (AVDD/DVDD) | 4.5 V – 5.5 V (5 V±10 %) |
| Typical power consumption | 32 mW |
| Reference voltage | 2.5 V±3 % |
| Package type | SSOP‑24 |
| Serial interfaces | SPI and RSIO |
The chip provides two serial interfaces: SPI and RSIO.
The device resets when AVDD drops below 4.0 V ± 0.1 V and operates normally when the voltage is above 4.3 V ± 0.1 V.
Both AVDD and DVDD are specified as 5 V ± 10 %, i.e., 4.5 V to 5.5 V.
Typical power consumption is 32 mW.