90E21
Single-Phase High-Performance Wide-Span Energy Metering IC
The 90E21 is a high-performance energy metering device for single-phase two-wire active energy meters. With the measurement function, the 90E21 can also be used in power instruments which need to measure voltage, current, etc.
Features
- Fully compliant with IEC standards IEC62052-11 and IEC62053-21
- Applicable to class 1 or class 2 single-phase watt-hour meter
- Accuracy of 0.1% for active energy over a dynamic range of 5000:1
- Temperature coefficient is 15ppm/°C (typical) for on-chip reference voltage
- Electrical parameters measurement: less than ± 0.5% fiducial error for Vrms, Irms, mean active/apparent power, frequency, power factor and phase angle
- Current sampled over shunt resistor or current transformer (CT)
- Voltage sampled over resistor divider network or potential transformer (PT)
- Voltage channel (when gain is ‘1’): 120uVrms~600mVrms
- Current channel (when gain is ‘24’): 5uVrms~25mVrms
