EMARMOUR™ Series

What is EMARMOUR™?

EMARMOUREMARMOUR™ 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 load while improving reliability by solving issues related to noise in the development of a variety of systems.

【The Need for High EMI Immunity Op Amps】

There are 2 main reasons for using high EMI immunity Op Amps The first is to shut out external noise in electronic devices that protect human lives and ADAS (Advanced Driver Assistance Systems) to prevent traffic accidents.
The second is to cope with increased noise generated by high voltage batteries and drive equipment along with high power motors in AC and power steering systems installed in electric vehicles.
ROHM’s high EMI immunity EMARMOUR™ Op Amp series provides stronger noise protection for electronic circuits.

"EMARMOUR™ Series" Key Features

Key Features 1. Industry-leading* noise immunity significantly reduces the design load for countermeasures

As shown in the graph of the output voltage fluctuation vs noise frequency below, in contrast to the measured peaks of standard and general-purpose high EMI immunity products that are easily affected by frequency-based noise, ROHM’s new products minimize fluctuations due to frequency, making it possible to limit output voltage variations to less than ±1% (vs ±3.5 to ±10% with standard products).
Achieving high EMI immunity greatly reduces the burden placed on designers of automotive electrical systems to develop noise countermeasures that typically require much time and effort.
This reduces the cost and space previously required for external components such as the CR filter and shielding.

*ROHM October 2021 study

Noise Immunity Comparison via Radio Wave Emission Test

Key Features 2. Significantly improving noise immunity by conducting a thorough review of circuits, layout, element size, and other factors

In addition to conducting a thorough analysis of previous products, adding noise countermeasures circuits, and reviewing the layout, ROHM selected processes that generate optimal capacitances to dramatically improve EMI immunity. The key to success was to utilize a flexible approach in selecting the optimum solution, rather than simply following the industry trend of reducing chip size. Breakthrough noise immunity could never be achieved with just one countermeasure, but was the culmination of 3 factors.

  • Circuit review

  • Layout review

  • Utilizing optimized processes

  • Susceptibility to external noise is prevented by fully aligning the above 3 measures

Key Features 3. Significantly reducing the time, effort, and costs for noise countermeasures

High EMI noise immunity created from an unprecedented design eliminates the need for an external CR filter and shield previously required, contributing to greater space savings while reducing peripheral component costs.
Also, previously when integrating noise countermeasures, if noise evaluation fails after implementing functional and noise designs, it was necessary to start from the beginning, placing a considerable burden in terms of time, effort, and cost.
In response, ROHM’s high EMI immunity Op Amps allow users to significantly reduce design man-hours and costs, thereby reducing delivery times for short-term set designs.

  • Conventional Op Amp ROHM High EMI Immunity Op Amp
  • When designing a new model (board)

Key Features 4. Provides superior versatility and complies with international standards for reliability

ROHM’s new high EMI immunity Op Amps maintain the same performance as conventional products, ensuring worry-free operation even when used as replacements.
In addition, compliance with the international automotive standard AEC-Q100 ensures superior reliability.

 

EMARMOUR™ Series Product Lineup

Op Amps

■High EMI Immunity Ground Sense Op Amps

Element StructurePart No.chSupply Voltage
(V)
Input Offset Voltage
(Max)
Input Bias Current
(Typ)(nA)
Slew Rate
(Typ)(V/μs)
Circuit Current
(Typ)(mA)
EMARMOUR™
(High EMI Immunity)
Nano Cap™
(Stable Output)
PackageComfySIL™
Functional
Safety Category
Automotive Grade
(AEC-Q100 Qualified)
BipolarBA82904YF-C23.0
to
36
6mV@25˚C
9mV@−40 to 125˚C
200.20.5SOP8FSsYES
BA82904YFVM-CMSOP8FSsYES
BA82902YF-C40.7SOP14FSsYES
NEW
BA82902YFV-C
SSOP-B14FSsYES

■High EMI Immunity 150°C Operation Ground Sense Op Amps

Element StructurePart No.chSupply Voltage
(V)
Input Offset Voltage
(Max)
Input Bias Current
(Typ)(nA)
Slew Rate
(Typ)(V/μs)
Circuit Current
(Typ)(mA)
EMARMOUR™
(High EMI Immunity)
Nano Cap™
(Stable Output)
PackageComfySIL™
Functional
Safety Category
Automotive Grade
(AEC-Q100 Qualified)
BipolarNEW
LM2904EYF-C
23.0
to
32
6mV@25˚C
9mV@−40 to 150˚C
200.20.6SOP8FSsYES
☆LM2904EYFJ-CSOP-J8FSsYES
NEW
LM2904EYFVM-C
MSOP8FSsYES
☆LM2902EYF-C41SOP-14FSsYES
☆LM2902EYFV-CSSOP-B14FSsYES

☆: Development planned

■High EMI Immunity Ground Sense Op Amps

Element StructurePart No.chSupply Voltage
(V)
Input Offset Voltage
(Max)
Input Bias Current
(Typ)(nA)
Slew Rate
(Typ)(V/μs)
Circuit Current
(Typ)(mA)
EMARMOUR™
(High EMI Immunity)
Nano Cap™
(Stable Output)
PackageComfySIL™
Functional
Safety Category
Automotive Grade
(AEC-Q100 Qualified)
BipolarBA83472YF-C23.0
to
36
10mV@25˚C
10mV@−40 to 125˚C
1008.54.3SOP8FSsYES
BA83472YFVM-CMSOP8FSsYES
NEW
BA83474YF-C
48.6SOP14FSsYES
NEW
BA83474YFV-C
SSOP-B14FSsYES

■High EMI Immunity Input/Output Rail-to-Rail Op Amps

Element StructurePart No.chSupply Voltage
(V)
Input Offset Voltage
(Max)
Input Bias Current
(Typ)(nA)
Slew Rate
(Typ)(V/μs)
Circuit Current
(Typ)(mA)
EMARMOUR™
(High EMI Immunity)
Nano Cap™
(Stable Output)
PackageComfySIL™
Functional
Safety Category
Automotive Grade
(AEC-Q100 Qualified)
CMOSNEW
BD87581YG-C
14.0
to
14
9mV@25˚C
10mV@−40 to 125˚C
0.0013.52.3SSOP5FSsYES
NEW
BD87582YFVM-C
25MSOP8FSsYES
NEW
BD87584YFV-C
410SSOP-B14FSsYES

■High EMI Immunity High Speed Ground Sense Op Amps

Element StructurePart No.chSupply Voltage
(V)
Input Offset Voltage
(Max)
Input Bias Current
(Typ)(nA)
Slew Rate
(Typ)(V/μs)
Circuit Current
(Typ)(mA)
EMARMOUR™
(High EMI Immunity)
Nano Cap™
(Stable Output)
PackageComfySIL™
Functional
Safety Category
Automotive Grade
(AEC-Q100 Qualified)
CMOSBD77501G17.0
to
15
27mV@25˚C0.001101.3SSOP5
BD77502FVM22.6MSOP8
NEW
BD77504FV
45.2SSOP-B14

Comparators

■High EMI Immunity Open Collector Comparators

Element StructurePart No.chSupply Voltage
(V)
Input Offset Voltage
(Max)
Input Bias Current
(Typ)(nA)
Slew Rate
(Typ)(V/μs)
Circuit Current
(Typ)(mA)
EMARMOUR™
(High EMI Immunity)
Nano Cap™
(Stable Output)
PackageComfySIL™
Functional
Safety Category
Automotive Grade
(AEC-Q100 Qualified)
Bipolar BA82903YF-C22.0
to
36
5mV@25˚C
9mV@−40 to 125˚C
501.30.6-SOP8FSsYES
BA82903YFVM-CMSOP8FSsYES
BA82901YF-C40.8SOP14FSsYES
BA82901YFV-CSSOP-B14FSsYES

■High EMI Immunity 150°C Operation Open Collector Comparators

Element StructurePart No.chSupply Voltage
(V)
Input Offset Voltage
(Max)
Input Bias Current
(Typ)(nA)
Slew Rate
(Typ)(V/μs)
Circuit Current
(Typ)(mA)
EMARMOUR™
(High EMI Immunity)
Nano Cap™
(Stable Output)
PackageComfySIL™
Functional
Safety Category
Automotive Grade
(AEC-Q100 Qualified)
BipolarNEW
LM2903EYF-C
23.0
to
32
5mV@25˚C
9mV@−40 to 150˚C
501.30.6-SOP8FSsYES
NEW
LM2903EYFVM-C
MSOP8FSsYES
☆LM2901EYF-C45mV@25˚C
8mV@−40 to 150˚C
1.2SOP14FSsYES
NEW
LM2901EYFV-C
SSOP-B14FSsYES

☆: Development planned

 

Related information

Nano Series

FUNCTIONAL SAFETY

 

*EMARMOUR™, Nano Cap™ and ComfySIL™ are trademarks or registered trademarks of ROHM Co., Ltd.