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TMAG6180-Q1: Support

Ayyappan A
Prodigy 40 points
Part Number: TMAG6180-Q1
Other Parts Discussed in Thread: TMAG6180

Tool/software:

Hi, 

We have below requirement to read the position of control surfaces in aircraft which has possible deflection angle of +/-179 Deg. Can we use TMAG6180-Q1 for below application and what is the resolution of IC couldnt find in datasheet.

At continuous 100RPM(1.6Hz), and no latency greater than 2msec.

with 12 Bit Res 4096/360(0 to +/-179)=11.33 Res/Deg; So minimum Detected degree (1/11.33=0.0886)

Regards

Ayyappan A

  • 0
    TI__Mastermind 26335 points

    Hello Ayyappan,

    Thanks for considering to use Texas Instruments.  The tmag6180 does not directly output an angle, rather it provides an analog voltage in accordance with a magnetic field vector.  The device translates the magnetic field vector into sine and cosine components which a microcontroller can process and translate into an angle. So long as the magnitude of the field vector is above 20mT, the device will provide a peak output voltage of 60% Vcc. Since the sine and cosine outputs are meant to be measured differentially, then the resolution of the output would be (60% Vcc )*2/4096.

  • 0
    Prodigy 40 points

    Hi Patrick

    The accuracy for IC given in datasheet is +/-0.1Deg, is this value of for FS degree (360).

    Apart for factory calibration, do we have provision for accessing the internal register to read and write commands for offset tunning, error correction, gain. Also, how shall I access the memory and diagnostics information.

    For any angle correction, error mismatch should we need to have logic written onto the microcontroller

    Thanks and Regards

    Ayyappan

  • 0 in reply to Ayyappan A
    TI__Mastermind 26335 points

    Hello Ayyappan,

    That accuracy specification is based on us comparing our post processed outputs gathered from a high resolution ADC against a characterized angle reference.  The accuracy corresponds to a full scale range of 360 degrees.

    I think the register question needs to be forwarded to whoever you are using for the microcontroller.  The TMAG6180 does not have communication lines or a register, rather just output lines and power.

    You may need to calibrate due to mechanical offsets found in your system assembly.   Those might be determined from prototyping.