New ICs ensure precise current and voltage measurements with ultra-low temperature drift

#News(IoTStack) [ via IoTForIndiaGroup ]

Silicon Labs has introduced a family of isolated analog amplifiers, voltage sensors and delta-sigma modulator (DSM) devices designed to provide accurate current and voltage measurement with very low drift across temperature.

Precise current and voltage measurement is essential for accurate operation of power control systems. To maximise efficiency and respond quickly to faults or changes in load, system controllers require current and voltage information from high-voltage rails. Silicon Labs’ third-generation isolation technology keeps controllers safe across wide temperature variations with 1414 V working voltage and 13 kV bipolar surge, exceeding stringent industry requirements.
Automotive battery and motor/photovoltaic inverter systems require reliable current monitoring with robust noise immunity. The Si89xx devices provide up to 3x higher common-mode transient immunity (CMTI) than competing products. The devices’ 75 kV/µs immunity to fast transients ensures reliable and accurate current readings in demanding industrial applications. The Si89xx family also supports a fail-safe indication to the host controller if the high-side supply voltage is not detected.

The Si89xx devices provide typical offset error as low as ±40 µV and ±0.1% gain error, enabling precise measurements. Typical offset drift as low as ±0.15 µV/˚C and typical gain drift as low as –6 ppm/˚C ensure exceptional accuracy across temperature.

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