Global semiconductor manufacturer ROHM, headquartered in Kyoto, Japan, has developed a compact CMOS operational amplifier named "TLR377GYZ," ideal for amplifying sensor detection signals such as temperature, pressure, and flow in applications like smartphones and small IoT devices.
The trend toward miniaturization in smartphones and IoT terminals requires the components they carry to shrink in size as well. Simultaneously, to enhance the control capabilities of application products, precise amplification of tiny signals from sensors is necessary. This calls for achieving miniaturization while maintaining high accuracy. Against this backdrop, ROHM has leveraged its years of expertise in circuit design, process technology, and packaging technology to develop an operational amplifier that meets the dual requirements of being compact and highly accurate.
By further refining ROHM's long-established circuit design, process technology, and packaging technology, the new product successfully achieves miniaturization and high precision, challenges that are typically considered difficult to address simultaneously in operational amplifiers.
Factors contributing to operational amplifier errors typically include "input offset voltage" and "noise." Both are critical aspects affecting amplification accuracy and can be mitigated by enlarging the built-in transistor size. However, this involves a delicate balance with miniaturization. Leveraging a built-in offset voltage correction circuit developed using ROHM's proprietary circuit design technology, the new product achieves a low input offset voltage of just 1mV while keeping the transistor size constant. Furthermore, the new product not only uses ROHM's proprietary process technology to enhance common flicker noise but also achieves ultra-low noise by readjusting resistance components at the device level, with an equivalent input noise voltage density of only 12nV/√Hz.
Moreover, the new product adopts a Wafer Level Chip Size Package (WLCSP) packaging, reducing pin spacing to 0.3mm utilizing ROHM's proprietary packaging technology. Compared to previous products, the size has been reduced by approximately 69%, and compared to previous small-sized products, the size has been reduced by approximately 46%.