New Chip-Scale CMOS Op Amp Features Standby Mode

Rohm, a leading semiconductor company, has recently unveiled a groundbreaking CMOS operational amplifier that is touted as the smallest on the market while incorporating a standby mode to conserve power.

The TLR377GYZ, a 1.8V – 5V rail-to-rail CMOS op amp from Rohm, comes in wafer scale packaging with dimensions of 0.88mm by 0.58mm. This represents a significant reduction in size, approximately 69% smaller than conventional products and 46% smaller than existing compact products. The WLCSP (Wafer Level Chip Scale Package) features a ball pitch of 0.3mm.

Designed to optimize the amplification of signals from sensors like temperature, pressure, and flow rate, the op amp is ideal for use in smartphones, small IoT devices, and similar applications. Its low input offset voltage and minimal noise contribute to enhanced accuracy in sensor circuits.

As the demand for smaller components in smartphones and IoT devices continues to grow, the need for op amps that can accurately amplify small signals becomes crucial for high precision sensing applications. The TLR377GYZ successfully strikes a balance between miniaturization and high accuracy, a feat that has been challenging with traditional op amps, thanks to Rohm's proprietary circuit design, process, and packaging technologies.

Traditional op amps often face challenges with offset voltage and noise generation, which can compromise amplification accuracy. Rohm's innovative approach involves developing proprietary circuits that achieve a maximum offset voltage as low as 1mV without the need to increase the size of the transistors. Additionally, the company's process technology effectively reduces flicker noise, resulting in ultra-low noise with an input equivalent noise voltage density of 12nV/√Hz by optimizing resistive components. The op amp also features a shutdown function for mobile devices, reducing power consumption during standby mode.