The advanced TMR process platform of Multidimensional Technology helps the consumer electronics industry expand application scenarios and achieve technological route upgrades
Jiangsu MultiDimension Technology Co., Ltd. (MDT), a magnetic sensor manufacturer specializing in Tunnel Magnetic Resistance (TMR) technology, has launched the TMR4101 high-precision magnetic grating sensor chip, which is suitable for consumer electronics and industrial applications such as camera autofocus and zoom, micrometer level displacement measurement, linear and angular position measurement, magnetic grating ruler and magnetic encoder.
Typical output signal waveform of TMR4101
The Multidimensional Technology TMR4101 magnetic gate sensor chip is used in conjunction with a multi pole magnetic gate with a magnetic pole distance of 0.4mm. When the chip moves along the length direction of the magnetic gate, its two built-in push-pull TMR half bridge structures output sine and cosine signals with a phase difference of 90 °, respectively. The period of the signal corresponds to the total length of an adjacent pair of north-south magnetic poles of 0.8mm. Based on the excellent high sensitivity and low noise characteristics of TMR technology, the sine and cosine output signals of TMR4101 can be accurately measured for micro displacement through analog front-end conditioning circuits and digital signal calculation. In typical application scenarios, it can achieve micrometer level repeated positioning accuracy. The advanced 8-inch TMR process of Multidimensional Technology optimizes manufacturing costs and improves chip reliability, while achieving a compact ultra-thin DFN4L (1.32 mm x 0.66 mm x 0.3 mm) package. It is particularly suitable for consumer application scenarios represented by smartphone and tablet camera modules with limited space size and the need to meet high-precision positioning requirements.
Schematic diagram of the relative position between TMR4101 and the matching magnetic gate
Multidimensional Technology provides a multi pole magnetic gate with a magnetic pole distance of 0.4mm that can be used in conjunction with TMR4101. The length and width of the magnetic gate can be selected according to the application requirements. For different application scenarios, Multidimensional Technology can customize magnetic gates with different pole distances and corresponding TMR sensor chips for customers.
TM4101 Product Features
• Tunnel magnetoresistance (TMR) technology
• Detect magnetic grating period of 0.8 mm
• High sensitivity
• Wide working voltage range
• Allow for larger measurement gaps
• Analog voltage output for phases A and B
• Good temperature stability
• Compliant with RoHS&REACH
The Multidimensional Technology TMR4101 magnetic grating sensor chip is used in conjunction with the previously released TMR3016 or TMR3017 angle sensors, providing an upgraded product solution for smartphone camera autofocus and zoom applications. Multidimensional Technology has planned a new product series based on TMR technology for both camera optical stabilization and intelligent wearable devices. These new products will be fully launched into the consumer electronics market by 2024, leveraging the low power consumption, high frequency response, and high signal-to-noise ratio characteristics of TMR technology to assist industry partners in upgrading their technology roadmap.
Multidimensional Technology independently owns advanced 8-inch TMR and AMR magnetic sensor production lines, with an annual chip production capacity of billions. Its complete manufacturing system has passed ISO9001, IS014001, and IATF16949 system certifications. Multidimensional Technology has reserved sufficient production capacity for partners in the consumer electronics, automotive electronics, industrial, medical, and new energy industries. It provides customers with high-quality magnetic sensor chip products and application solutions in various applications such as position detection, angle and velocity measurement, linear displacement measurement, weak magnetic field and magnetic feature detection, measuring instruments, and current detection. The IDM business model of Multidimensional Technology supports the design, manufacturing, and sales of its own branded magnetic sensor products, while also providing wafer foundry services to assist industry partners in upgrading their technology roadmap and achieving win-win cooperation.
