Sensors

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 has introduced a low-power digital output mems microphone for voice command and sound detection in IoT applications such as smart watches and augmented reality glasses. Called T5848, it has a I2S interface and an ‘acoustic activity detect’ (AAD) function with its own outputs. Vital statistics of its surface-mount bottom acoustic port package are 3.5 x 2.65 x 0.98mm. Three traditional ...

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 ...

CUI Devices has announced an incremental encoder for motors with shafts between 1 and 6.35mm in diameter. “The AMT12 series brings the same durability, accuracy and immunity to environmental particulates as current AMT encoder models in a more compact 22.2 x 22.2 x 12.8mm package,” according to the company. Outputs are single-ended cmos quadrature A and B signals that can ...

Hamamatsu Photonics has created an x-ray image sensor for real-time non-destructive testing and digital radiography. C16401SK-51 has 1,272 x 1,104 pixels, a photo-sensitive area of 140 x 122.8mm, and uses cmos sensing with a GOS (gadolinium oxysulfide) scintillator. “This combination ensures optimal performance and reliability, even when used with x-ray tube voltages of up to 160kV, making it suitable for ...

Innodisk’s EV2U-SGR1 Camera Module revolutionizes smart parking management by offering high-quality image capturing for smart parking meters. This allows the advantage for smart parking meters to replace traditional manual enforcement methods, providing a convenient solution with features like automatic license plate recognition and real-time monitoring. This not only optimizes space usage and enhances efficiency but also relieves the burden of ...

Texas Instruments is planning a pair of precision current monitors that can measure ±50A over -4 to 110V. They are the standard INA791B (right) and the PWM residue rejecting INA790B (below). “High-precision measurements are enabled by matching the shunt resistor value and the current-sensing amplifier gain across temperature,” according to TI. “Enhanced PWM rejection reduces the effect of common-mode transients ...