Sensors up to 2 bar.

Analog Microelectronics is adding further models with pressure ranges up to 2 bar to its high-precision AMS 5935 pressure sensor series. Until now, the AMS 5935 series of board-mount sensors was only available for differential pressure measurements in the ultra-low and low pressure ranges up to 100 mbar. Now several new pressure ranges are added, with which overpressure and vacuum measurements up to 1 bar as well as absolute pressure measurements up to 2 bar are possible. This expands the application possibilities of the AMS 5935 considerably.

In medical technology, the AMS 5935 can now be used for insufflators, IPC systems, hyperbaric oxygen therapy or blood pressure measurements. Further applications can be found in breath monitoring, ventilators, CPAP systems and spirometers. The extremely low power consumption of the AMS 5935 also allows it to be used in mobile, battery-operated devices with wireless data transmission technology.

The new AMS 5935 are especially distinguished by their high measurement accuracy at room temperature (0.1 %FSO for 1 bar pressure sensors) and the low total error (TEB = 0.25 %FSO) in the temperature range from -25 to 85 °C. In addition, they offer a resolution of 18 bits, an I2C / SPI output and a ceramic DIL package for PCB mounting.

To simplify the first experiments with the AMS 5935, an evaluation kit for Windows and an Arduino board are available.

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Evaluation kits simplify and shorten the design process.

Evaluation kits for the high-resolution 18-bit digital pressure sensors in the AMS 5935 series have been announced by Analog Microeletronics GmbH. With the new USB Starter-Kit/Data-Logger AMS 5935 and the Arduino Uno Kit AMS 5935, two evaluation platforms are now available that simplify and shorten the design-in process significantly.

The USB Starter Kit consists of two PCBs, a USB cable and software for a Windows PC. This allows the AMS 5935 to be connected to a PC without any additional components and to read data from the sensor's I2C interface. In addition, the Starter Kit provides the ability to change the sensor's I2C address and to graphically display and save measurement data to a file.

If the developer does not only want to use the predefined functions of the starter kit, but also wants to implement own functions, read out measurement data from the sensor's SPI interface or have more influence on the data analysis, the Arduino Uno Kit AMS 5935 is a good choice. The kit consists of a PCB that is plugged into Arduino Uno's connectors and the software package "AMS". This makes it possible to read out AMS 5935's measurement data with the help of an Arduino Uno in a very short time.

Wether the USB Starter Kit or the Arduino Uno Kit AMS 5935 are chosen, both allow quickly to find out if the sensor is suitable for a planned application.

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DP Sensor.

Analog Microelectronics has a new bidirectional differential pressure sensor for ultra low pressures and thereby expands its digital board-level pressure sensor series AMS 5915 with I2C output.

The new AMS 5915-0002-D-B allows the precise measurement of extremely low differential pressure in a pressure range from -250 Pa (-2.5 mbar) vacuum up to 250 Pa (2.5 mbar) overpressure. The membrane based differential pressure sensor features a burst pressure of 200 mbar, is completely gas-tight and is especially suitable for ultra low pressure applications in the fields of industry, HVAC and medical instrumentation.

The board-mount AMS 5915-0002-D-B is digitally calibrated, linearized and extensively temperature compensated in a wide operating temperature range of -25 to 85 °C. It features a resolution of 14 bit and is ideal for system integration with its supply voltage of 3.3 V and I2C interface. AMS 5915-0002-D-B reaches a total error band (TEB) > 2 %FSO over its complete operating temperature range without additional zero-point adjustment at system level. Furthermore the combination of a high quality MEMS-element with a modern mixed-signal ASIC on a ceramic substrate guarantees excellent long term stability. With a reaction time of typically 0.5 ms the sensor is also suitable for fast measurements. AMS 5915-0002-D-B is available in two package variants: in a ceramic DIL package with vertical metal tubes for hose connection or without tubes for O-ring sealing (manifold mount).

For easy evaluation of AMS 5915-0002-D-B Analog Microelectronics offers a USB starter kit, which can also be used to program an individual I2C address. For operation with an Arduino adapter PCBs for Arduino Uno and Nano are available as well as an example code for Arduino’s integrated development environment.

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