The TMAG6181-Q1 is a high-precision angle sensor based on the AMR sensor technology vertically integrated on top of the integrated amplifiers on silicon. The differential output sine and cosine signals from the AMR sensor are proportional to the angle of the applied magnetic field. They are internally signal conditioned, temperature compensated, and driven by differential output amplifiers with the ability to drive large capacitive loads. The output voltages of the AMR sensor are ratiometric to the supply voltage so the external ADC can use the supply voltage as a reference.

The TMAG6181-Q1 features a SLEEP pin to enable low power operation. The device integrates a rotation turns counter to measure the number of rotations of the external magnetic field using the integrated X and Y Hall sensors at a resolution of 90 degrees. The TURNS pin provides the integrated turns counter output using Pulse Width Modulation (PWM) scheme.

The TMAG6181-Q1 contains the following functional and building blocks:

• The Power Management and Oscillators block contains internal regulators, biasing circuitry, a low-frequency, wake-up oscillator and a high-frequency, wake-up oscillator, overvoltage and undervoltage detection circuitry
• The AMR sensor contains two Wheatstone bridges made of magnetic resistive sensors, each sensing one of the components of the applied magnetic field, the sine and the cosine components.
• The AMR sensing path contains the signal conditioning amplifiers, offset compensation, automatic gain control circuitry and the output drivers.
• The Turns Counting path contains the X and Y Hall sensors, related biasing circuitry, signal conditioning, logic comparators and a counter to keep track of rotations
• The Internal memory block supports the factory-programmed values
• The diagnostic blocks support background diagnostic checks of the internal circuitry