KTH5701

Low Power, High Precision 3D Hall Sensor

The KTH5701 is a digital output 3D Hall sensor chip that integrates three independent Hall sensors for the X, Y, and Z axes. The signal chain uses a high precision operational amplifier and a 16-bit ADC to convert the analog signals into digital outputs. The external host can read the measurement data through SPI or I2C modes. Additionally, the chip integrates a temperature sensor for magnetic field temperature compensation.

The KTH5701 supports continuous sensing mode, wake-up sleep mode, and single measurement mode, making it suitable for various application scenarios. The BUTT_OUT pin is used to detect the button function between the magnet and the chip, and can also be configured as a trigger mode to trigger a single measurement.
The KTH5701 also integrates the CORDIC algorithm to support plane angle output (XY plane, XZ plane, YZ plane). The amplitude adjustment register greatly facilitates common knob applications in both on-axis and off-axis configurations. It supports magnetic field threshold detection for the selected plane (XY plane, XZ plane, YZ plane), allowing the same chip to detect both knob and button scenarios simultaneously. This product features high integration and flexible application, making it widely applicable in various scenarios.

KTH5701 can sense magnetic fields from the X, Y, and Z axes. The Hall elements in the XY direction are sensitive to magnetic fields parallel to the package, while the Z direction elements are sensitive to magnetic fields perpendicular to the package. The Hall elements in each direction are sensitive to both the N and S poles. When the chip is in a magnet-free environment, the three-axis magnetic field output value is 32768. When the magnetic field direction is consistent with the arrow direction shown in the figure, the axis output value is greater than 32768. When the magnetic field direction is opposite to the arrow direction shown in the figure, the axis output value is less than 32768.