TL;DR: Key Takeaways
- ROHM has introduced 17 new high-precision CMOS operational amplifiers across two series, TLRx728 and BD728x.
- These new components are specifically designed to meet the demanding requirements of automotive, industrial, and consumer precision applications.
- The TLRx728 series offers an ultra-low input offset voltage of 150 µV (typ.), enhancing measurement accuracy.
- Both series feature a low noise voltage density of 12 nV/√Hz and a fast slew rate of 10 V/µs, alongside crucial rail-to-rail input and output capabilities.
- Key applications include advanced sensor signal processing, precise current detection, efficient motor driver control, and robust power supply monitoring.
- The new CMOS op amps for automotive and industrial systems are now available through major distributors like DigiKey, Mouser, and Farnell.
ROHM Unveils New High-Precision CMOS Op Amps for Advanced Automotive Systems and Industrial Applications
In a significant development for the automotive, industrial, and consumer electronics sectors, leading semiconductor manufacturer ROHM has announced the expansion of its operational amplifier lineup with 17 new CMOS operational amplifiers. These devices, part of the newly introduced TLRx728 and BD728x series, are engineered to deliver enhanced precision and reliability across a spectrum of demanding applications, particularly bolstering capabilities for complex signal processing in vehicles and factory automation.
The strategic release, effective April 2, 2026, reinforces ROHM’s commitment to advancing semiconductor solutions that address the evolving needs of high-growth markets. The new op amps are designed to be integral components in systems requiring highly accurate signal conditioning, from sophisticated sensor interfaces in electric vehicles to critical control loops in industrial machinery.
Elevating Precision: Understanding the New Op Amp Series
The foundation of ROHM’s latest offering lies in its dual-series approach, providing tailored performance characteristics to suit diverse application requirements. This expansion into high-performance CMOS op amps for automotive and industrial uses marks a pivotal step in enabling more accurate and efficient electronic designs.
Dual Series, Distinctive Performance
The TLRx728 series stands out with an impressive input offset voltage of 150 µV (typical). This ultra-low offset is critical in applications where even minor deviations in signal measurement can lead to significant errors, such as high-precision data acquisition or sensitive medical instruments. Minimizing input offset voltage ensures that the amplifier introduces negligible error when no input signal is present, translating directly into higher accuracy for the entire signal chain.
Complementing this, the BD728x series offers a typical input offset voltage of 1.6 mV. While slightly higher than the TLRx728, this specification remains robust for a wide range of general-purpose precision applications where cost-effectiveness and good performance are paramount. Both series are available in versatile 1-channel, 2-channel, and 4-channel configurations, providing designers with flexibility to optimize board space and system complexity.
Shared Excellence in Noise and Speed
Beyond their distinct offset voltage characteristics, both the TLRx728 and BD728x series share several high-performance attributes. A critical common feature is a low noise voltage density of 12 nV/√Hz at 1 kHz. Noise density is a measure of the amplifier’s internal noise contribution, which can obscure small signals and degrade measurement resolution. A low noise floor is especially vital for amplifying weak sensor signals without introducing additional interference.
Furthermore, these new operational amplifiers boast a fast slew rate of 10 V/µs. The slew rate dictates how quickly an op amp’s output can change in response to a rapid input voltage transition. A high slew rate ensures that the amplifier can accurately process fast-changing signals without distortion, making these CMOS op amps for automotive motor control and high-speed data acquisition applications particularly well-suited.
Critical Features for Modern Electronic Design
Modern electronic systems, especially within the automotive and industrial domains, increasingly demand components that can operate efficiently and reliably under constrained conditions. ROHM’s new op amps integrate features designed to meet these challenges head-on, contributing to the development of more robust and compact solutions.
Rail-to-Rail Input and Output Benefits
A significant advantage of both series is their rail-to-rail input and output capability. This feature allows the operational amplifier’s input stage to accept signals that extend all the way to the positive and negative supply rails, and its output stage to swing nearly from one supply rail to the other. In single-supply designs, commonly found in battery-powered or compact automotive systems, this maximizes the usable dynamic range of the amplifier.
This rail-to-rail functionality eliminates the need for complex biasing networks or multiple power supplies, simplifying circuit design, reducing component count, and ultimately lowering system costs and power consumption. It is particularly beneficial in applications where the input signal might span the full supply voltage, such as battery voltage monitoring or current sensing on the positive supply rail.
Addressing Measurement Accuracy Limits
In both automotive and industrial signal chains, the precision of measurement is paramount for safety, efficiency, and performance. The input offset voltage and the noise floor of the operational amplifier are often the primary factors limiting overall measurement accuracy. By offering impressive specifications such as 150 µV (TLRx728) or 1.6 mV (BD728x) offset voltage, and a consistent 12 nV/√Hz noise density, ROHM’s new op amps directly tackle these limitations.
These specifications enable the accurate detection and amplification of minute signals, crucial for reliable performance in critical systems. The capability to cover a wide range of precision requirements positions these CMOS op amps for automotive and industrial environments as versatile solutions for engineers seeking to enhance system performance and reliability.
Expanding Application Horizons: Automotive and Industrial Impact
The introduction of these high-performance operational amplifiers is poised to significantly impact various critical applications within the target markets, driving innovation in areas ranging from vehicle intelligence to automated manufacturing processes.
Enhanced Sensor Signal Processing
Modern vehicles and industrial equipment rely heavily on a multitude of sensors for data acquisition, ranging from temperature and pressure sensors to sophisticated current and position sensors. Accurate sensor signal processing is fundamental for the reliable operation of advanced driver-assistance systems (ADAS), engine management units, battery management systems (BMS) in electric vehicles, and robotics in industrial settings.
The precision and low noise characteristics of ROHM’s new op amps ensure that signals from these sensors are amplified and conditioned with minimal error, providing clean and accurate data for downstream processing. This directly translates to improved system responsiveness, higher operational safety, and better overall control.
Robust Current Detection and Motor Control
Precise current detection is vital for efficient motor control in electric vehicles, hybrid vehicles, and various industrial machinery, including servo drives and automated production lines. Accurate current feedback allows for optimal motor operation, preventing overcurrent conditions, enhancing energy efficiency, and improving dynamic response.
The 10 V/µs slew rate combined with low offset and noise density makes these CMOS op amps for automotive motor driver control highly effective. They can rapidly and accurately detect changes in motor current, enabling precise adjustments to motor drive signals and contributing to smoother, more efficient, and safer operation of electric motors.
Reliable Power Supply Monitoring
Maintaining stable and reliable power supplies is crucial for the longevity and performance of any electronic system, especially in the harsh environments often found in automotive and industrial applications. These operational amplifiers are well-suited for power supply monitoring tasks, where they can accurately measure voltage and current levels to ensure the power integrity of a system.
Accurate monitoring can help detect anomalies, prevent system failures, and enable proactive maintenance. This capability contributes to the overall robustness and reliability of the end product, from vehicle infotainment systems to critical industrial control panels.
Market Availability and Strategic Pricing
The new TLRx728 and BD728x series of CMOS op amps for automotive, industrial, and consumer precision applications are readily accessible to designers and manufacturers globally. ROHM has ensured broad distribution through established channels, facilitating easy procurement for design and production cycles.
These components are currently available through leading electronics distributors, including DigiKey, Mouser, and Farnell. This widespread availability supports engineers in integrating these advanced operational amplifiers into their latest designs with efficient supply chain management. Sample pricing for these devices starts at $2.00 per unit for the 1-channel configuration, $2.80 for 2-channel, and $4.00 for 4-channel options (excluding tax). This competitive pricing strategy positions ROHM’s new series as an attractive option for a broad range of precision applications.
ROHM’s Commitment to Advanced Semiconductor Solutions
This latest product launch underscores ROHM’s ongoing commitment to innovation in the semiconductor industry, particularly in providing high-quality, reliable components for demanding market segments. By continuously enhancing its portfolio with high-precision devices like these CMOS op amps for automotive and industrial sectors, ROHM plays a vital role in enabling the next generation of electronic systems.
The company’s focus on foundational analog components ensures that engineers have access to the building blocks necessary to develop advanced, high-performance, and energy-efficient solutions for the future of transportation, manufacturing, and consumer technology.
Frequently Asked Questions (FAQ)
What are the primary applications for ROHM’s new CMOS op amps?
The new TLRx728 and BD728x series are ideal for precision applications in automotive, industrial, and consumer sectors, including sensor signal processing, current detection, motor driver control, and power supply monitoring. Their high accuracy and low noise make them suitable for critical measurement tasks.
What is the key difference between the TLRx728 and BD728x series?
The main distinction lies in their input offset voltage. The TLRx728 series offers an ultra-low typical input offset voltage of 150 µV, targeting the highest precision requirements, while the BD728x series provides a robust typical offset voltage of 1.6 mV for a broader range of general precision applications.
Why is rail-to-rail input and output important for these op amps?
Rail-to-rail input and output allows the op amp to operate effectively across the full range of its supply voltage. This feature is crucial in single-supply designs prevalent in automotive and portable industrial equipment, maximizing dynamic range and simplifying power management circuits.
How do these new op amps improve measurement accuracy in automotive systems?
By offering low input offset voltage and a low noise voltage density (12 nV/√Hz), these CMOS op amps for automotive applications minimize the intrinsic errors introduced by the amplifier. This results in more accurate and reliable data acquisition from sensors, critical for ADAS, BMS, and various control systems.
Where can engineers purchase samples or production quantities of these new operational amplifiers?
ROHM has made the TLRx728 and BD728x series widely available through major global distributors. Engineers and procurement professionals can obtain these operational amplifiers from DigiKey, Mouser, and Farnell, with sample pricing starting at $2.00 per unit for 1-channel configurations.