BL0942 is a calibration-free energy metering chip with a built-in clock, suitable for single-phase multi-function energy meters, smart sockets, smart home appliances and other applications.
Features
- Two independent Sigma-Delta ADCs, one current and one voltage.
- RMS current range ( 10mA~30A ) @1mohm
- Active energy ( 1w~6600w ) @1mohm@220V
- Can output current, voltage RMS, fast current RMS, active power
- The batch factory gain error is less than 1% , and the external components can be exempted from calibration if they meet certain conditions
- The current channel has an overcurrent monitoring function, and the monitoring threshold and response time can be set
- Voltage / current zero-crossing signal output
- Built-in waveform register, which can output waveform data for load type analysis
- SPI ( the fastest rate supports 900KHz )/UART ( 4800-38400bps ) communication
- Power down monitoring, below 7V, the chip enters the reset state
- Built-in 218V reference voltage source
- Built-in oscillation circuit, the clock is about 4MHz
- Chip single working power supply 3.3V, low power consumption 10mW ( typical value )
Resources
