In the ever-evolving world of technology, the demand for smaller, more powerful devices like smartphones, wearables, and IoT gadgets continues to push the boundaries of engineering. These compact devices rely heavily on the ability to amplify low-power signals from equally small sensors. To meet this challenge, Rohm has introduced the TLR377GYZ, the smallest op amp on the market, designed specifically for applications where space is at a premium.

A Tiny Powerhouse

Measuring just 0.88 mm x 0.58 mm x 0.33 mm, the TLR377GYZ op amp is a marvel of miniaturization. Despite its tiny size, it offers impressive functionality, thanks to its wafer-level chip scale package (WLCSP) that efficiently fits six connections with a 0.3-mm ball pitch.

Key Specifications of the TLR377GYZ

This rail-to-rail op amp operates with a supply voltage range of 1.8 V to 5.5 V, making it versatile for a wide range of applications. It can function in both single-supply and dual-supply modes, accommodating various circuit designs. With low standby current consumption and a shutdown function, the TLR377GYZ is ideal for mobile, wearable, and power-sensitive applications requiring high-accuracy sensing.

Big Performance in a Small Package

In many applications, sensors for temperature, pressure, and flow operate at voltages too low for microcontrollers to accurately process. This is where an op amp like the TLR377GYZ comes into play—it amplifies these small signals to a usable level without introducing noise or distortion.

One of the main challenges in designing such a small op amp is avoiding common signal distortion errors, such as input offset voltage and noise generation. These errors are usually mitigated by using larger transistors, but shrinking the transistor size can increase susceptibility to these issues. Rohm has tackled this problem with improved circuit design, advanced fabrication processes, and innovative packaging.

For example, Rohm's proprietary compensation circuit addresses input offset voltage errors, ensuring accurate performance even in a miniature package. The company has also implemented process improvements to reduce flicker noise, a type of low-frequency distortion common in small chip-scale components.

Check it on Rohm Semiconductor: https://www.rohm.com/products/amplifiers-and-linear/operational-amplifiers/high-performance/input-output-rail-to-rail-low-offset-voltage/tlr377gyz-product#productDetail

Challenges in Design and Prototyping

Designing with such a small component brings its own set of challenges. While many engineers are familiar with ball grid array (BGA) packaging, the 0.3 mm pitch of the TLR377GYZ is new enough to disrupt standard practices. Additionally, the WLCSP form factor is not light-tight, which means designers must take precautions to avoid photoelectric effects that could impact performance.

To assist with prototyping and testing, Rohm offers the TLR377GYZ-EVK-001 evaluation board. This board is sized like an SSOP6 IC and can be used for component evaluation or as a replacement on a PCB designed for an SSOP6 op amp. The chips are now available in both sample and production quantities from multiple distributors.

Evaluation Board - TLR377GYZ-EVK-001

TLR377GYZ-EVK-001 is a conversion board that connects TLR377GYZ, which is a CSP package, to a SSOP6 pattern.

Rohm's TLR377GYZ op amp represents a significant advancement in miniaturization, offering high performance in a package that fits the smallest of spaces. As devices continue to get smaller, components like the TLR377GYZ will play a critical role in enabling the next generation of innovative technology.


Reference Links:

- TLR377GYZ Datasheet: https://fscdn.rohm.com/en/products/databook/datasheet/ic/amp_linear/opamp/tlr377gyz-e.pdf

- https://www.rohm.com/products/amplifiers-and-linear/operational-amplifiers/high-performance/input-output-rail-to-rail-low-offset-voltage/tlr377gyz-product#productDetail

- https://www.allaboutcircuits.com/news/rohm-announces-the-industrys-smallest-cmos-op-amp

- Image credits to Rohm Semiconductor
- Reference from https://www.allaboutcircuits.com

- https://www.rohm.com/products/amplifiers-and-linear/operational-amplifiers/high-performance/input-output-rail-to-rail-low-offset-voltage/tlr377gyz-product#productDetail