ROHM’s New ±1% Accuracy Current Sense Amplifier ICs Reduce Mounting Area by Approx. 46% Over Conventional Configurations

ROHM has recently developed the space-saving, high accuracy current sense amplifier ICs (BD1421x-LA series) for industrial applications – including wireless base stations, PLCs and inverters – as well as consumer applications such as home appliances.

The BD14210G-LA incorporates all required peripheral components. That simplifies current sensing by connecting a shunt resistor and a bypass capacitor. This reduces the number of components from eleven to just three compared to conventional configurations (operational amplifier + discrete components). Furthermore, it decreases the mounting area by 46% (SSOP6 package). Additionally, a highly accurate current detection of ±1% has been achieved over the entire temperature range (-40°C to +125°C). The internal circuitry prevents current detection accuracy to decrease even when an external RC filter circuit for noise suppression is added. That minimizes the number of man-hours required for design. The wide input voltage range (-0.2V to +26V) makes the BD14210G-LA ideal for current sensing applications operating from 12V/24V power supplies (more info).