Semiconductor Strain Sensor STREAL SR300 Series - Semiconductor Business -Macnica

Overview

What is a strain sensor?

This is a sensor that measures strain (= the amount of deformation (expansion, contraction) of an object). By knowing the strain, it is possible to estimate the force applied to the object. It is attached directly to objects such as metal and can detect minute changes.

What is the semiconductor strain sensor STREAL?

Macnica brand's STREAL semiconductor strain sensor is an ultra-compact, highly accurate, and low-power semiconductor strain sensor. Conventional large-scale strain measurement systems have been integrated onto a semiconductor chip measuring just 2.5mm square, significantly improving ease of integration into equipment. To ensure smooth integration into customer equipment, the sensor is supplied in a module format equipped with a semiconductor chip. STREAL is available in two series. The SR300 series features low power consumption, a measurement resolution of 1με, and a small chip (2.5mm square), making it suitable for a variety of applications, including IoT. The SR500 series is ideal for industrial machinery requiring precise control, such as robots and machine tools.

exterior

*Apply adhesive to the adhesive surface of STREAL and attach it to the object to be measured.

Module Types

Two types of detection modules with different chip mounting angles are available, allowing flexible selection according to the application.

Outline specifications

item	Specifications (common to tension, compression and shear)
Power supply voltage (VDD)	Compatible with 3.3V/5.0V
Operating temperature range	-20℃～70℃
Output format	Analog output/digital output (SPI)
resolution	±1με (minimum detection unit)
Built-in AD converter	12-bit resolution, maximum sampling rate: 10ksps
Analog Output Voltage Range	Full scale: 0.5V to (VDD-0.5V)
Terminals	Total of 12 pins
	Terminal configuration No. Terminal name Function 1 PDN_B Standby mode signal 2 VDD Power supply voltage 3 OVDD I/O power supply 4 VOFS analog offset adjustment 5 GND Reference voltage 6 SOUT Sensor analog output 7 SDIN Serial Data Input 8 SDOUT Serial data output 9 CS Chip Select 10 SCK Serial Clock Input 11 MOUT for testing 12 TRIM Device trimming terminal
Built-in features	・Amplifier magnification change - Fine adjustment of strain sensitivity ・Offset adjustment - Offset temperature characteristic correction
Built-in temperature sensor	・Resolution: 1℃ ・Measurement range:-40 to +120°C

If you would like to learn more about the SR300 series, please submit the form below to download the datasheet.

Download the datasheet here

Adhesion and connection information

item	content
glue	Epoxy-based heat-curing adhesive is recommended.
Adhesive surface	12 x 5 mm attached to a flat surface (cannot be attached to a curved surface)
Recommended Connector	Hirose Electric FH52K-12S-0.5SH

The bonding procedure guide is here.

Evaluation kit configuration

Macnica offers an evaluation kit that allows you to immediately begin initial evaluation and PoC of STREAL. The evaluation kit itself is common to both the SR300 and SR500 series, and by adding an SR500-compatible conversion board, it can be flexibly used with both series. Using the evaluation kit reduces risks and hurdles in the initial evaluation stage, allowing you to smoothly proceed with operation checks on the actual device.

Evaluation kit accessories list

Constitution	quantity	detail
Evaluation kit main body	1 piece	Evaluation board (with dedicated plastic case)
wireless receiver	1 piece	Receiver connected to evaluation PC for wireless communication
Extension cable (1m)	1 bottle	Used to extend the distance between the STREAL module and the evaluation kit. (Can be extended up to 3m)
USB cable (1m)	1 bottle	Used to connect the evaluation PC and the evaluation kit via USB communication Can also be used to supply power from a mobile battery during wireless communication
STREAL module	1 piece	STREAL main unit When you purchase the evaluation kit, you can choose one of the following items: ①SR300 tension/compression type (adhesion area: 12 x 5 mm) ②SR300 shear type (adhesion area: 12 x 5 mm)
CD-ROM	1 sheet	①User's Manual ② Microcomputer firmware ③Evaluation application

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