TI中文支持网Part Number:LDC5072-Q1
The LDC5072 chip outputs a voltage difference of 200mv between OUT0P/N, but a voltage difference of 1.8V between OUT1P/N. Is this phenomenon normal? If not, what should we do and how to obtain position information by processing these two differential signals? The PCB schematic is provided in the attachment.
Vivian Gao：
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(1) LDC5072-Q1: Unequal output voltage difference of LDC5072 chip and subsequent processing issues – Sensors forum – Sensors – TI E2E support forums
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Hello John, we have designed a 90mm long Linear-Type1 coil using the LDC5072sensor design tool to detect the position of straight tooth slots. The dimensions of the teeth and slots are both 30mm, as shown in the attached image. Can we use this chip to achieve this design? Please provide some assistance，
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The test waveforms of IN0P/N, IN1P/N, and LCIN/OUT are shown in the following figure. When we switched channels (the IN1 channel of the coil is connected to the IN0 pin of the chip, and the IN0 channel of the coil is connected to the IN1 channel of the chip), we found that the voltage difference between OUT0P/N became 1.8V and the voltage difference between OUT1P/N became 200mV, which is exactly opposite to before switching. Is this voltage difference related to the design of the coil
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Vivian Gao：
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Vivian Gao：
Could you share the inputs you used in the sensor design tool to get your design?
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We used the LDCdesign tool and selected TYPE1 as the sensor type to generate a set of 90mm receiving coils. The design parameters should be left unchanged by default, as shown in the attached figure. I would like to ask why the graphic of the linear receiving coil needs to be drawn in the form of sine and cosine
