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Part number
Measurement
Power Consumption
ADC Channels
Output
Clock
VDD
Calibration
Free
Package
ST0942 Single 3.3V 10mW Calibration-Free Single-Phase Energy Metering IC with UART CascadingST0942
Built-in clock calibration-free single-phase energy metering: RMS current/voltage, fast current RMS (over-current protection), active power/energy, waveform data output; current 10mA~30A@1mΩ, energy 1W~6600W@1mΩ@220V
10 mW (typ, single 3.3V)
2 independent Sigma-Delta ADCs (one current, one voltage)
UART/SPI (SPI up to 900 kHz, UART 4800~38400 bps, up to 4 devices cascaded on TSSOP14L); zero-crossing detection output
Built-in oscillator, approx. 4 MHz
Single 3.3V
Factory gain error <1%
Calibration-free when external discrete components meet specified conditions
SOP8 / SSOP10L / TSSOP14L
ST0940 Single 3.3V 10mW Built-in Clock Calibration-Free Single-Phase Energy Metering ICST0940
Built-in clock calibration-free single-phase energy metering: RMS current/voltage, active power/energy, fast current RMS (over-current protection), temperature detection, waveform output, phase angle; current 10mA~35A@1mΩ, energy 1W~7700W@1mΩ@220V
10 mW (typ, single 3.3V)
2 independent Sigma-Delta ADCs (one current, one voltage)
UART/SPI (data) + voltage zero-crossing signal output
Built-in oscillator, approx. 4 MHz
Single 3.3V
Factory gain error <1% per batch
Calibration-free when external discrete components meet specified conditions
TSSOP14
ST0937B Single 3.3V 8mW Single-Phase Socket Energy Metering IC with Built-in ClockST0937B
Single-phase socket meter energy metering: active energy, active power, RMS current/voltage; current range 4mA~30A@1mΩ
8 mW (typ, single 3.3V)
2 high-precision Sigma-Delta ADCs
CF/CF1 high-frequency pulse output (CF metering; CF1 indicates RMS current/voltage)
Built-in oscillator, no external crystal required
Single 3.3V (3.0~3.6V)
Factory calibrated
Not specified
SOP8
ST0910 Single 3.3V 40mW Calibration-Free 10-Phase AC/DC Multi-Channel Energy Metering ICST0910
10-phase AC/DC energy metering: RMS current/voltage, active power/energy, leakage monitoring (min 1 mA, fastest response 10 ms), per-channel overcurrent indication, temperature measurement (-40~85°C, ±3°C), waveform output; optional full-wave/fundamental/DC filters
40 mW (typ, single 3.3V)
11 high-precision Sigma-Delta ADCs (simultaneously measure 11 current/voltage signals)
UART / High-speed SPI
Built-in oscillator, approx. 8 MHz
Single 3.3V
Factory gain error calibrated <1%; system error <2% without system-level calibration (with external high-precision shunt); high-accuracy (<0.3%) requires system-level calibration
Calibration-free for system error <2%
LQFP48