ROHM Adds TLRx728 and BD728x CMOS Op Amp Series

Why It Matters

The addition expands ROHM's precision analog portfolio, giving designers more low‑error, high‑speed options for sensor and power‑management circuits, a critical need as automotive and industrial systems become increasingly complex.

Key Takeaways

• TLRx728 series offers 150 µV typical input offset
• BD728x series provides 1.6 mV typical offset voltage
• Both series deliver 12 nV/√Hz noise at 1 kHz
• Slew rate reaches 10 V/µs across configurations
• Available in 1, 2, 4‑channel packages, rail‑to‑rail

Pulse Analysis

The demand for high‑accuracy operational amplifiers has surged as automotive electronics shift toward advanced driver‑assistance systems and electrified powertrains. Engineers require op‑amps that can handle fast sensor data while minimizing offset and noise, ensuring reliable control loops for braking, steering and battery management. In parallel, industrial automation is embracing tighter feedback loops for motor drives and condition monitoring, further pressuring component suppliers to deliver precision performance in compact, power‑efficient packages.

ROHM's new TLRx728 and BD728x families answer this market pressure with a blend of low offset voltage, ultra‑low noise and high slew rate. The TLRx728’s 150 µV typical offset makes it suitable for millivolt‑level sensor front‑ends, whereas the BD728x’s 1.6 mV offset still meets many power‑monitoring needs at a lower cost. Both series maintain a 12 nV/√Hz noise floor and a 10 V/µs slew rate, supporting rapid signal transitions without sacrificing accuracy. Their rail‑to‑rail I/O capability and flexible channel counts (1, 2, 4) allow designers to optimize board space and simplify routing across a range of form factors, from compact consumer gadgets to rugged automotive ECUs.

By expanding its precision analog lineup, ROHM positions itself against competitors such as Texas Instruments and Analog Devices, which dominate the high‑performance op‑amp segment. The competitive pricing—starting at $2 for single‑channel devices—makes the series attractive for volume production, especially as supply chains normalize post‑pandemic. As sensor‑centric designs proliferate in electric vehicles and Industry 4.0 equipment, the availability of robust, low‑cost op‑amps like the TLRx728 and BD728x will likely accelerate time‑to‑market for next‑generation systems.