Honeywell HMC1052L handbook
Datasheet
The HMC1052L is a high performance magnetoresistive sensor design with two-axis orthogonal sensing, miniature size, and low height profile. Each of the magnetoresistive sensors is configured as a 4-element Wheatstone bridge to convert magnetic fields to differential output voltages. Capable of sensing fields below 0.1 milligauss, this sensor offers a compact, low cost, high sensitivity, and highly reliable solution for low field magnetic sensing.