Bosch Sensortec recently announced the release of a compact 9-axis motion sensor — the BMF055 — along with a software development package that enables customized sensor systems to be programmed for specific applications. The new sensor is part of the company’s Application-Specific Sensor Node (ASSN) family and combines an accelerometer, a gyroscope and a magnetometer with a Cortex M0+ processor from Atmel’s SAMD20 microcontroller family. The device is in a 5.2 x 3.8 x 1.1mm3 package. The company says that the new sensor is well suited to the needs of users developing advanced application-specific sensor fusion algorithms, adding sophisticated motion sensing capabilities, and replacing multiple discrete components with a single package. Among the market segments being targeted are robotics, gaming, remote controls, navigation systems, drones, and human interface devices for Internet of Things (IoT) projects.
The software development package includes a precompiled BSX Lite fusion library with integration guidelines, API source files for individual sensors and example projects as a plugin for Atmel Studio. The Atmel toolchain can be downloaded from Atmel’s website. The company noted that this software development package will enable end users to develop their own application-specific firmware for the BMF055 sensor without requiring an additional application processor.
Chip Scale Review asked Divya Thukkaram, Product Manager at Bosch Sensortec, to discuss some of the requirements and challenges the company had to address to develop the new sensor, and to provide context for it within the ASSN family. “The target was to build an ASSN small enough to fit into wearables and IoT devices,” Thukkaram told CSR. “The BNO055 delivers fused orientation data that is required by many IoT and wearable applications, while the BMF055 is the flexible programmable version of the BNO055.”
Regarding the technical challenges that had to be overcome to meet the customized SiP requirements of the new sensor’s package, Thukkaram said that the big challenge for the hardware was the integration of six different chips with more than 90 bond wires in one single package. “The duration and complexity of the product qualification rise together with the integration of increasing hardware components,” said Thukkaram. “Of course, the software development was also a big challenge, first of all because of the complexity of the fusion algorithms, and certainly also due to the flexibility we set as a target from the very beginning.” Thukkaram further noted that an advantage of the sensor and the software development package is that the device takes care of the complete sensor fusion, “so the designer can concentrate on the application development.” She added that the industry trend is to further miniaturize package technology and integrate more sensors into an SiP package to meet the requirements of wearable devices, as well as IoT applications.