BL0942 Clock Calibration Free Energy Smart Metering Chip SSOP10

Description

BL0942 Clock Calibration Free Energy Smart Metering Chip SSOP10

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 costefficient 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.

Features:
⚫ 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(BL0942 TSSOP14L supports cascading up to 4 ICs through UART 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 package

Datasheet