ROHM has developed the TLR377GYZ, an ultra-compact CMOS operational amplifier (op amp) with a voltage range of 1.8V to 5V and rail-to-rail input/output. It is designed to amplify signals from sensors, such as those measuring temperature, pressure, and flow rate, used in smartphones, small IoT devices, and similar applications.
As smartphones and IoT devices become smaller, the need for compact components increases. High precision sensing requires op amps that can accurately amplify small signals, necessitating improvements in low input offset voltage and noise performance without compromising on size.
The TLR377GYZ achieves a balance between miniaturization and high accuracy, which has been challenging with traditional op amps. This is made possible by advancements in proprietary circuit design, process, and packaging technologies developed by ROHM over many years.
Input offset voltage and noise generation in op amps can degrade amplification accuracy. These issues are typically mitigated by increasing the size of the built-in transistors, which conflicts with the goal of miniaturization. ROHM’s proprietary circuit technology achieves a maximum offset voltage as low as 1mV without increasing transistor size. Additionally, their process technology significantly reduces flicker noise. By optimizing resistive components at the element level, an ultra-low noise level is achieved with an input equivalent noise voltage density of 12nV/√Hz. The new product uses a WLCSP (Wafer Level Chip Scale Package) with a ball pitch of just 0.3mm, reducing size by approximately 69% compared to conventional products and 46% over existing compact products.
An IC-mounted conversion board that can replace SSOP6 packages is also available to facilitate replacement and initial evaluation. Both the TLR377GYZ and the conversion board can be purchased through online distributors. Additionally, the high accuracy SPICE model, known as ROHM Real Model, is available on ROHM’s website for verification simulations.
Looking ahead, ROHM plans to further enhance op amp performance by reducing power consumption through their proprietary ultra-low current consumption technology, alongside achieving greater miniaturization and accuracy.
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