onsemi has announced the availability of the CEM102, a state-of-the-art miniaturized analog front-end (AFE) that enables electrochemical sensing with the highest accuracy at very low currents. With its small form factor and the industry’s lowest power consumption, it allows engineers to create versatile and compact solutions for industrial, environmental and healthcare applications such as air and gas detection, food processing and agricultural monitoring as well as medical wearables such as continuous glucose monitors. It is ideal for applications that rely on battery-operated electrochemical sensors. Industrial safety equipment such as portable gas detection will alert workers of potential hazards when they are in remote settings or where mobility is needed.
The CEM102 is designed to be used together with the RSL15 Bluetooth 5.2 enabled microcontroller, which provides the industry’s lowest power Bluetooth Low Energy technology. As a complete electronics solution, it allows biosensors and environmental sensors to accurately measure chemical current while operating with very low system power consumption and wide supply voltage range. With a broad 1.3 to 3.6 V supply voltage range, the system can operate from a 1.5 V silver oxide battery or a 3 V coin cell. Its operation consumes just 50 nA in disabled mode, 2 uA in sensor biased mode, and 3.5 uA in active measurement mode with the 18-bit ADC continuously converting. This translates to a market leading 14 days of operation with only a 3 mAh battery or several years with larger size batteries.
Key Features
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Complete two-channel solution for electrochemical measurement (system level)
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Supports from one to four electrodes
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Extremely low system current consumption
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Supports two battery selections of either 1.3 - 1.65V or 2.375 - 3.6V
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High resolution ADC, several DACs for continuous bias setting and factory-trimmed system
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Detection of abnormal sensor conditions and host processor wakeup
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Small footprint - 1.884 x 1.848 mm packaging
