BL BL0942

BL0942 is a built-in clock calibration-free energy metering IC, which is suitable for single-phase multifunction electricity meters, smart sockets, smart home appliances and other applications, with more cost-efficient solution. BL0942 incorporates two sigma delta ADC with a high accuracy energy measurement core. It measures line voltage and current and calculate active energy as well as instantaneous voltage and current. BL0942 provides access to on-chip registers via UART/SPI interfaces. One configurable low jitter pulse output Pin provide pulse that is proportional to active energy. Zero-crossing voltage (ZX_V), zero-crossing current (ZX_I) and overcurrent are accessible via the external pin. BL0942 has a patent active power no-load detection to prevent meter-creep.

• Two independent Sigma-Delta ADC, one current and one voltage.
• Less than 0.1% error in active energy measurement over a dynamic range of 4000:1
• Current RMS range [10mA ~ 30A) @ 1mOhm
• Measure current, voltage RMS, fast current RMS, active power, sampled waveform
• The batch factory gain error is less than 1%, and the peripheral components can be free of calibration under certain conditions
• Programmable over-current detection
• ZX_V/ZX_I output
• Provide sampled waveform data for load type analysis
• SPI (maximum speed 900kHz)/ UART (4800~38400bps) communication
• On-chip power supply monitor
• On-chip reference 1.218v(typical)
• On-chip oscillator as clock source
• Single 3.3V supply, low power consumption 10mW (typical)
• SSOP10L/TSSOP14L package

• Single-phase multifunction electricity meters
• Smart sockets
• Smart home appliances