iC-TW14 iC-PMX Companion Chip
●DESCRIPTION
■iC-TW14 is a companion chip for iC-PMX that performs all the functions necessary to implement an energy-harvesting multiturn absolute encoder using an external singleturn sensor system such as iC-LG,iC-MHM,iC-MU,iC-MN,etc.The iC-TW14 also provides diagnostic modes and access to iC-PMX parameters for the design,optimization,and calibration of a complete system.
■Without power applied,the iC-PMX uses the attached Wiegand sensor and FRAM to count turns of the magnet autonomously by harvesting the energy of the Wiegand wire pulses.At power-on,the iC-TW14 interrogates the iC-PMX and determines the absolute position of the magnet.It provides this information via an SSI data stream to the external singleturn sensor for start-up calibration.During powered operation,the external singleturn sensor tracks the angular position of the magnet and the number of turns,providing output to the user’s system while the iC-TW14 monitors the turns counting and other operational conditions of the iC-PMX for faults.
■iC-TW14 has an operating temperature range of up to 125°C and is suitable for measuring at high speed.
■Typical applications are highly-integrated energy-harvesting magnetic multiturn absolute encoders.These absolute encoders can replace existing gear or battery-buffered solutions.
●FEATURES
■Complete processing for iC-PMX-based energy-harvesting absolute multiturn encoders using Wiegand sensors¹
■SSI multiturn data output
■Interface to iC-PMX(SPI master and singleturn Hall signal I/O)
■UART Interface for calibration and diagnosis
■Adjustable synchronization offset and multiturn preset value
■Based on NXP² S9KEAZN8 microcontroller
■Extended temperature range from–40 to+125°C
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iC-TW14 、 iC-PMX 、 S9KEAZN8 、 iC-LG 、 iC-MHM 、 iC-MU 、 iC-MN 、 iC-TW14 QFN24-4x4 |
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[ Gearless revolution counting ][ Revolution counting without batteries ][ Energy harvesting multiturn encoders ][ Absolute end-of-shaft encoders ] |
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Datasheet |
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Please see the document for details |
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QFN;QFN24 |
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English Chinese Chinese and English Japanese |
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2019/12/04 |
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Rev A5 |
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1.8 MB |
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