ASCII Startup [New Japan Radio] Industry's highest level of EMI resistance * 1 Sample distribution of NJM2904B / NJM2902B single-power operational amplifier with 2/4 circuit started

New Japan Radio Co., Ltd. New Japan Radio Co., Ltd. (Headquarters: Chuo-ku, Tokyo, President: Kenichi Morita) has analog signal processing for various sensors that strongly require electromagnetic noise immunity (EMI immunity) in in-vehicle ECUs * 2. We have developed the NJM2904B / NJM2902B operational amplifiers with 2/4 circuits for automobiles that can operate with a single power supply and have the industry's highest level of EMI resistance. While inheriting the versatility of the industry standard operational amplifiers NJM2904 / NJM2902, EMI resistance has been greatly improved. In all in-vehicle ECU designs from body systems to powertrains, we contribute to a wide range of improvements in design quality, such as risk reduction by design rework, reduction of EMC design man-hours, and risk reduction when replacing parts. * 1 Researched by New Japan Radio in January 2021 * 2 ECU: Electronic Control Unit "Achieves the industry's highest level of EMI resistance" ● DPI evaluation method compliant with international standards IEC 62132-4, ED-5008 Measurement result The maximum injection power at which the output voltage fluctuation is less than 300 mV, and the larger the value, the higher the EMI resistance. [Background] When using an operational amplifier in an in-vehicle ECU, if external electromagnetic noise (EMI) that exceeds the operating band intrudes, the output voltage may fluctuate unexpectedly, which leads to ECU malfunction. Noise immunity evaluation is generally carried out at the final stage of vehicle development, and if a problem is discovered there, design rework can occur from analysis to countermeasures, ECU pattern design, and mounting component selection. It has the property and has a great impact on the design man-hours. While the number of ECUs installed is increasing due to the increasing number of functions in vehicles, the electromagnetic noise environment is becoming extremely harsh due to the increase in mobile phones, smartphones, electronic devices equipped with communication functions, etc., and operational amplifiers with high EMI resistance. The demand for is increasing. [Special length] 1. In addition to the input terminal, the EMI resistance of the power supply terminal has also been strengthened. The EMI intrusion route to the operational amplifier is generally considered to be vulnerable to the EMI resistance of the input terminal, and products with EMI countermeasures applied only to the input terminal. Existed. However, it is not enough assuming the case where the noise superimposed on the wire harness invades through the power supply terminal of the amplifier. New Japan Radio has taken optimal EMI countermeasures for each stage based on thorough analysis of the EMI noise intrusion path to each stage of the operational amplifier internal circuit, the effect on circuit operation, and the mechanism leading to malfunction. As a result, we have succeeded in raising the EMI resistance of the power supply terminal to the highest level in the industry in addition to the input terminal. Since it is a circuit measure inside the IC, it is not easily affected by the chip layout and assembly conditions, provides stable EMI resistance, and reduces the risk of design rework after noise evaluation. 2. Achieves the highest level of EMI resistance as a single component under the evaluation of IEC 62132-4. There are various uses for operational amplifiers, and the same operational amplifiers are installed in various electrical and electronic devices. At this time, since the required EMC standard differs depending on each state, it is extremely important to properly compare / evaluate the EMI resistance of the operational amplifier alone, which is the source. NJM2904B / NJM2902B have been compared / evaluated based on appropriate standards based on the international standard IEC 62132-4 * 3 and JEITA standard ED-5008 * 4, and confirmed to be the highest level in the industry. , You can use it with confidence from new design to consideration of parts replacement. [DPI evaluation results compliant with IEC 62132-4, ED-5008] Both the input terminal and power supply terminal have achieved the industry's highest level of EMI resistance. The power supply terminals ensure high EMI resistance even under harsh conditions without bypass capacitors. In this evaluation, the upper limit is the injection power of 27 dBm. * 3 IEC 62132-4 One of the IEC 62132 series, the international standard for semiconductor EMC (immunity) test methods. IEC 62132-4 is called the DPI method (Direct Power Injection Method), which evaluates immunity performance by injecting power into the IC terminal by capacitive coupling and measuring the limit power at which the IC operates normally. test. * 4 ED-5008 JEITA standard, semiconductor EMC performance equivalence evaluation method. It is a standard for evaluating the difference in EMC performance of semiconductors, and the evaluation method conforms to IEC 62132-4. [Product appearance] [Product function] ● NJM2904 / NJM2902 upward compatible, wide operating power supply voltage: + 3V to 36V, low current consumption: typ. 0.7mA, low input offset voltage: typ. 2mV, max. 4mV ● AEC-Q100 (Grade1): Scheduled to comply with 22 years ● Single power supply, ground sensing ● Package: VSP8 / SSOP14 [Application] ● In-vehicle ECU ● Voltage detection, current detection amplifier ● Various sensor amplifiers ● Various filters, waveform shaping [ Sample price / time] Product name Sample price Sample time NJM2904B ¥ 100. Available NJM2902B ¥ 200. Scheduled for March 2020 [Corporate information] Company name: Shin Nihon Radio Co., Ltd. (Nisshinbo Group *) Location: Nihonbashi Yokoyama, Chuo-ku, Tokyo Town 3-10 URL: https://www.njr.co.jp/ * Shin Nihon Radio plays a central role as a microdevice business company. [Contact for inquiries regarding this matter] Press releases, inquiries for interviews Electronic Device Division Digital Marketing Department Advertising Planning Section TEL: 049-278-1497 e-mail: semicon@njr.co.jp

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