RN8209G can measure active power, reactive power, active energy and reactive energy, and can provide two-channel independent active power and RMS, voltage RMS, line frequency, zero-crossing interrupt, etc. to achieve flexible anti-tampering solutions.

RN8209G supports all-digital gain, phase and offset calibration, with the active and reactive energy pulses respectively output from the pins of PF and QF.

RN8209G provides two serial interfaces SPI and RSIO, to facilitate communication with the external MCU, in which RSIO is RENERGY’s proprietary single-wire communication interface, able to achieve two-channel communication based on a single data cable.

The internal power supply monitoring circuit of RN8209G can ensure reliable operation of the chip when power on and off.

Features

1.Measurement

n Three channels of Σ-△ ADC are provided.

n The active energy accuracy is less than 0.1% (< 0.1%) over a dynamic range of 1500:1 with the  IEC62053-22: 2003 Standard supported.

n The reactive energy accuracy is less than 0.1% (< 0.1%) over a dynamic range of 1500:1 with  the IEC62053-23: 2003 Standard supported.

n Two-channel current and one-channel voltage RMS is provided, with the RMS accuracy <0.5%  over the 400:1 dynamic range.

n No-load threshold is adjustable.

n Reverse active power indication is provided.

n Provide voltage channel frequency measurement.

n Provide voltage channel zero-crossing detection.

2.Software meter calibration

n The meter constant (HFConst) is adjustable.

n Gain and phase calibration is provided.

n Offset calibration is provided for active, reactive and RMS.

n Reactive phase calibration is provided.

n Acceleration is provided for small-signal meter calibration.

n Automatic checksum is provided for configuration parameters.

3.SPI / RSIO interfaces are provided

4.Power supply monitoring is provided

5.Single +5 V power supply with the typical power consumption value of 32mW

6.Built-in 2.5V ± 3% reference voltage, with typical temperature coefficient of 25ppm / ℃

7.SSOP24 lead-free package is adopted