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ROHM Semiconductor's Operational Amplifiers Enable Improved Signal Processing Accuracy

ROHM Semiconductor today introduced the development of the BD5291G and the BD5291FVE low voltage, low offset operational amplifiers (opamp) designed to amplify signals from motion sensors such as accelerometers and gyroscopes.

ROHM's BD5291G and BD5291FVE provide a common-mode rejection ratio of 70dB (min), compared to only 45dB (min) with comparable devices, making it possible to provide high-accuracy signal amplification. (45dB and 70dB are roughly equivalent to 178x and 3,162x, respectively, resulting in an 18x improvement.). (PRNewsFoto/ROHM Semiconductor)

Recent years have seen a growing number of devices, such as smartphones, tablet PCs, and portable gaming systems, that incorporate sensors to detect acceleration, angular velocity, and other parameters. Sensors are often embedded in applications that convert physical changes to small electrical signals. To make use of these small signals, however, they must be amplified using sensor signal amplifiers, which are positioned downstream of the sensor and require sensitive analog technology to ensure high-accuracy amplification.

Both the BD5291G and BD5291FVE utilize ROHM's industry-leading analog technology, enabling input/output full-swing operation at only 1.7V (vs. 1.8V with comparable devices). In addition, high common-mode rejection ratio results in a small-signal processing accuracy 18 times better than what can be achieved with ordinary low voltage operational amplifiers, making them ideal for sensor signal amplification.

Key Features
1. Low voltage input/output full-swing operation
Low-voltage (1.7V) input / output full-swing operation provides sufficient margin against supply voltage fluctuations. This makes them well-suited for applications with low supply-voltage requirements.

2.High accuracy signal amplification
Low input offset voltage combined with high common-mode rejection ratio (70dB min vs. 45dB min with conventional products) makes it possible to amplify small signals (i.e. from sensors) with greater accuracy.

Pricing: US$0.16 (BD5291FVE-GTR)
(3000pcs) US$0.27 (BD5291G-GTL)
Availability: Samples Now
Delivery: 14 weeks ARO


  • Smartphones
  • Tablet PCs
  • Portable CD/DVD players
  • Handheld gaming equipment and other devices utilizing motion sensors
  • Microphone amps
  • Active filters
  • Buffer amps
  • Amplification circuits
  • General-purpose low voltage opamp applications

About ROHM Semiconductor:
ROHM Semiconductor is an industry leader in system LSI, discrete components and module products, utilizing the latest in semiconductor technology. ROHM's proprietary production system, which includes some of the most advanced automation technology, is a major factor in keeping it at the forefront of the electronic component manufacturing industry. In addition to its development of electronic components, ROHM has developed its own production system so that it can focus on specific aspects of customized product development. ROHM employs highly skilled engineers with expertise in all aspects of design, development and production. This allows ROHM the flexibility to take on a wide range of applications and projects and the capability to serve valuable clients in the automotive, telecommunication and computer sectors, as well as consumer OEMs.



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