What is EMARMOUR™?
EMARMOUR™ is the brand name given to ROHM products developed by leveraging proprietary technologies covering chip layout, processes, and circuit design to achieve ultra-high noise immunity that limits output voltage fluctuation to within ±3% across the entire noise frequency band when testing according to the ISO11452-2 standard. This unprecedented noise immunity reduces design resources and time while improving reliability by solving issues related to noise in the development of vehicle electrical systems.
EMARMOUR™ Series Featuring Ultra-High Noise Immunity
| Product Type | Part No. | No. of Channels | Supply Voltage Range |
Current Consumption | Input Offset Voltage |
Input Voltage Range |
Output Voltage Fluctuation Due to Noise*1 |
Operating Temp. Range |
Package |
|---|---|---|---|---|---|---|---|---|---|
| High-Speed Op Amp | NEW BD77501G | 1ch | 7.0V to 15V |
1.3mA | ±4mV（Typ.） ±27mV（Max.） |
VSS to VDD－2 .0V |
Less than ±1% | -40℃ to +85℃ |
SSOP5 |
| Ground Sense Op Amp*2 |
BA82904YF-C | 2ch | 3.0V to 36V |
0.5mA | ±2mV（Typ.） ±6mV（Max.） |
VEE to VCC －1.5V |
-40℃ ～ 125℃ |
SOP8 | |
| BA82904YFVM-C | MSOP8 | ||||||||
| BA82902YF-C | 4ch | 0.7mA | SOP14 | ||||||
| BA82902YFV-C | SSOP-B14 | ||||||||
| BA82902YFJ-C | SOP-J14 | ||||||||
| BA82902YFVJ-C | TSSOP-B14J | ||||||||
| Ground Sense Comparator*2 |
NEW BA82903YF-C | 2ch | 2.0V to 36V |
0.6mA | ±2mV（Typ.） ±5mV（Max.） |
SOP8 | |||
| NEW BA82903YFVM-C | MSOP8 | ||||||||
| NEW BA82901YF-C | 4ch | 0.8mA | SOP14 | ||||||
| NEW BA82901YFV-C | SSOP-B14 |
*1: Under ISO11452-2 noise testing
*2: Qualified under the automotive reliability standard AEC-Q100
*EMARMOUR™ is trademarks or registered trademarks of ROHM Co., Ltd.
The BD77501G is the industry’s first op amp that not only supports high-speed amplification (high slew rate: 10V/us) required in anomaly detection and other systems, but also completely eliminates oscillation caused by load capacitance (i.e. wiring). Unlike conventional high-speed op amps that can become unstable due to load-capacitance-induced oscillation, ROHM’s new product ensures stable operation with no unwanted oscillation. In addition, whereas the output voltage for conventional products can fluctuate by ±200mV or more across the entire noise frequency band, the BD77501G provides unprecedented EMI Immunity (noise immunity) that limits variation to less than ±20mV (1/10th).
This enables high-speed signal amplification without being affected by load capacitance or external noise when installed in the latter stages of sensor applications, improving reliability and reducing design time.
Key Features 1. The industry’s first no oscillation and high-speed op amps that minimizes design time related to load capacitance
「The BD77501G utilizes original Nano Cap™ power supply technology to achieve extremely stable control, making it the industry’s first op amp that completely eliminates oscillation induced by load capacitance (i.e. wiring) while supporting high-speed amplification (high slew rate: 10V/us) required in anomaly detection and other systems.
Unlike conventional op amps that can be difficult to use due to restrictions imposed on the wiring and peripheral components resulting from instability caused by load capacitance, ROHM’s new op amp eliminates oscillation to ensure stable operation and facilitate application design.
Key Features 2．Superior noise immunity reduces noise design requirements
Whereas the output voltage of conventional products can fluctuate by ±200mV or more across the entire noise frequency band, ROHM’s latest EMARMOUR™ series op amp achieves unprecedented noise immunity that limits variation to less than ±20mV. This eliminates the need for countermeasures (filter circuits) for each noise frequency, reducing the noise design resources for sensors (which play an important role in a variety of systems) facilitating application design while improving system reliability.
Key Features 3．Eliminates 10 parts required for noise suppression
The BD77501G provides superior noise immunity that eliminates the need for external noise countermeasure components conventionally required for standard products (i.e. RC filters for the power supply, input, and output pins). For example, in the case of a 1ch op amp, ROHM’s new product uses 10 fewer external components than conventional solutions.
Application Examples
■Facility management equipment such as abnormal current and gas detectors
■Motors requiring high-speed control (signal transmission)
■Inverter control equipment
■Pre-drive buffers for driving transistors
...and other applications in the industrial and consumer fields requiring high-speed signal transmission and amplification without the need to consider load capacitance.
＜What is the Nano Cap™？＞
Nano CapTM is ROHM’s original technology that provides stable control even with a capacitance on the order of nF.
Incorporating in an op amp makes it possible to configure a circuit that prevents oscillation even with an output capacitance on the order of nF, simplifying circuit design considerably
*Nano Cap™ is trademarks or registered trademarks of ROHM Co., Ltd.
Key Features 1. Groundbreaking noise tolerance reduces design resources and time
In contrast to conventional products whose output voltage can fluctuate up to ±20%, the BA8290xYxx-C series utilizes superior noise tolerance to limit output voltage fluctuation to within ±1%, preventing malfunctions. This enables reduction of design resources and time for noise characterization and measure implementation that plays an important role in automotive systems design while improving reliability.
Key Features 3. Meeting international automotive requirements
The BA8290xYxxx-C series is qualified under the automotive reliability standard AEC-Q100 and reduces both current consumption (0.6mA vs 0.8mA) and offset voltage (±5mV vs ±7mV) compared to conventional products. Furthermore, a broad lineup is offered in a variety of common surface mount packages and channel counts with standard comparator pin layout, making it easy to replace existing products in applications sensitive to noise.
Application Examples
■EV/HEV inverters ECUs
■ECUs
■Automatic transmissions
■Electric power steering
■Automotive lamps
■Combination switches
■EV chargers
■Car navigation
■Vehicle AC
and other onboard electrical systems sensitive to noise
Key Features 1. Groundbreaking noise tolerance reduces design resources and time
In contrast to conventional products whose output voltage can fluctuate up to ±20%, the BA8290xYxx-C series utilizes superior noise tolerance to limit output voltage fluctuation to within ±1%, preventing malfunctions. This enables reduction of design resources and time for noise characterization and measure implementation that plays an important role in automotive systems design while improving reliability.
Key Features 2. Decreasing the number of noise suppression components
Superior noise tolerance eliminates the need for external components used in noise countermeasures (CR filters for the power supply, input, and output pins) used with conventional products. For example, in the case of a 4ch comparator, ROHM’s new products require 28 fewer components than conventional solutions.
Key Features 3. Meeting international automotive requirements
The BA8290xYxxx-C series is qualified under the automotive reliability standard AEC-Q100 and reduces both current consumption (0.6mA vs 0.8mA) and offset voltage (±5mV vs ±7mV) compared to conventional products. Furthermore, a broad lineup is offered in a variety of common surface mount packages and channel counts with standard comparator pin layout, making it easy to replace existing products in applications sensitive to noise.
Application Examples
■EV/HEV inverters
■ECUs
■Automatic transmissions
■Electric power steering
■Automotive lamps
■Combination switches
■EV chargers
■Car navigation
■Vehicle AC
and other onboard electrical systems sensitive to noise