Tag Archives: sensor

  Infineon has announced a 5V version of its compact (13.8 x 14 x 7.5mm) CO2 sensor. “The sensor is based on the photoacoustic spectroscopy principle, where CO2 molecules within the sensor cavity absorb infrared light, generating small pressure changes that are detected by an acoustic detector,” according to the company. “CO2 concentration is then delivered in the form of ...

Allegro MicroSystems had introduced 1MHz bandwidth current sensors that can measure hundreds of amps – the first fruit of its acquisition of Crocus Technologies. The technology is tunneling magnetoresistance, and the sensors are intended to sit over the current-carrying PCB track to be measured. Output is a voltage linearly proportional to the current, responding within 300ns. There are two base ...

Health-related chemicals can be detected on dry skin, according to the National University of Singapore (NUS), which developed a stretchable ‘ionic-electronic bilayer hydrogel’ sensor with the Singapore Agency for Science, Technology and Research (A*Star). The chemicals are known as solid-state epidermal biomarkers. “These biomarkers, which include cholesterol and lactate, are found in the stratum corneum, the outermost layer of the ...

HBK has launches what it describes as a “tactical-grade” embedded inertial navigation system in a 38 x 24 x 8.6mm 8.3g package – 18% thinner and 20% lighter than its earlier 3DMCV5. 3DM-CV7-INS, as it will be known, has 1.5°/hr gyro bias instability – which is where the tactical grade comment comes from, and is calibrated over its operating range ...

STMicroelectronics has created a time-of-flight distance sensor for industrial use. VL53L4ED works over -40 to +105°C and in high ambient light, and provides “provides distance measurement to objects up to 1,150mm away over the full temperature range,” according to the company. “Special settings allow accurate distance measurement up to 800mm under strong ambient light [5klux].” On-board the 4.4 x 2.4 ...

Allegro MicroSystems has announced a 4 x 4mm QFN current sensor that measures hundreds of amps bidirectionally, with a burden resistance of ~100μΩ (plus ~500pH). Called ACS37220, five versions are available, giving a choice of sensitivity (±100, 150 or 200A) and operation voltage (3.3 or 5V) – only the ±200A 3.3V option is not available (see table). Power consumption is ...

Infineon and Swoboda are developing current sensor modules for automotive traction inverters and battery management systems. The deal combines Infineon’s sensor ICs with Swoboda’s expertise in sensor modules, and the first product (photo right) is aimed specifically at Infineon’s ‘HybridPACK Drive G2’ three-phase traction motor drive modules. Later models will cover more general applications. The infineon-specific model is called the ...

Melexis has qualified a pair of current sensors to UL/IEC 62368-1 for use where ‘reinforced isolation’ is mandated. “Until now, MLX91220 and MLX91221 had only been qualified as a basic, single barrier, isolation device, mandating the need for an engineer to incorporate extra elements like an isolation amplifier into their design,” according to the company. The UL/IEC 62368-1 certification (material ...

TDK is aiming at automotive and industrial 360° magnetic angle sensing in high-reliability systems with a tunnel-magnetoresistance (TMR) IC. TAS8240 is designed to operate next to a rotating magnet and contains four pairs of TMR half bridges (four Wheatstone bridges) to provide four separated sine-cosine outputs. “Depending on system architectures, fail-operational concepts can be supported by the new sensor,” according ...

Micronas had created a pair of automotive-rated Hall effect magnetic angle sensors that work up to 150,000rpm. “Developers have the choice between two sensor models – HAL 3020 and HAL 3021 – for fast angle determination, with which they can meet the need for robust motor position detection and ISO 26262-compliant development. The components have differential or single-ended sine and ...