Magnetic sensors play a crucial role in various fields. The 3-D magnetic field sensing capability is becoming increasingly important in applications such as navigation, position detection and consumer electronics. The final goal of this work is to design an analog front-end circuit to read out a novel 3-axis Hall magnetic sensor at the transistor level. The design of the IC front-end is an extension of the PCB characterization of the Hall sensor. In this work, a PCB (printed circuit board) is designed first for the characterization of the sensor. The measured specs are used for the IC front-end design. Finally, this current spinning read-out system achieves a residual offset of 1 mT and a dynamic range of 58 dB.