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ROHM Develops New EMARMOUR Op Amp Series

ROHM has introduced the BD8758xY series (BD87581YG-C, BD87582YFVM-C) of rail-to-rail input/output high-speed CMOS op-amps that feature improved EMI immunity for automotive and industrial equipment applications requiring high-speed sensing in harsh environments, such as vehicle engine control units and anomaly detection systems for factory automation equipment.

ROHM ROHM released the EMARMOUR™ series in 2017 that has since been well received in the automotive and industrial markets due to their superior noise immunity that reduces design resources by combining a vertically integrated production system with proprietary analog design technology.

The EMARMOUR™ series is designed to prevent malfunctions due to noise without the need to take special application measures. The latest BD8758xY series in particular has demonstrated superior performance under four international noise evaluation tests.

For example, in ISO 11452-2 radio wave emission testing conducted by vehicle manufacturers, the output voltage of standard products fluctuates by more than ±300mV in all frequency bands, while the new BD8758xY series achieves ±10mV or less.

At the same time, the CMOS element structure enables accurate, high-speed signal amplification – without being affected by external noise when installed inside the targeted sensor applications. This significantly improves reliability while reducing design production hours in a wide range of applications, including anomaly detection systems.

In addition, the ROHM Real Model, a new high accuracy SPICE model that matches the electrical and temperature characteristics of the actual IC and simulation values to prevent rework after prototyping, is available on ROHM’s website.

EMARMOUR is the brand name reserved by ROHM only for those products leveraging proprietary technologies covering layout, processes, and circuit design to achieve ultra-high noise immunity that minimizes output voltage fluctuation across the entire noise frequency band during noise evaluation testing under the international ISO 11452-2 standard. This unprecedented noise immunity both reduces design resources while improving reliability by solving issues related to noise in the development of a variety of systems.

Application Examples

  • EV/HEV inverters, engine control units, eCall (vehicle emergency call system), car navigation/air conditioning systems
  • Industrial factory automation equipment, measurement equipment, measuring instruments, servo systems, and sensor systems
  • and other automotive/industrial applications sensitive to noise


Aishwarya Saxena

A book geek, with creative mind, an electronics degree, and zealous for writing.Creativity is the one thing in her opinion which drove her to enter into editing field. Allured towards south Indian cuisine and culture, love to discover new cultures and their customs. Relishes in discovering new music genres.

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