We report on a miniaturized magnetic field sensor system consisting of a fluxgate sensor fabricated in CMOS-compatible planar technology and a CMOS-ASIC for sensor supply, readout and signal processing using second harmonic principle with a feedback loop for zero field operation. The system exhibits a sensitivity of 9.2k0.1 mV/pT for a magnetic field range of k 9 h T and a temperature range of 0°C to 70°C. The 3 dl3 bandwith is 300 Hz and a noise value of 30 n T m was estimated. Using 5V supply voltage a power consumption of 16OmW for the system was measured.
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