I am not familiar with the HMC1001 so I looked at the data sheet. From a quick reading of the data sheet it seems that the output is of the order of millivolts not microvolts.
Have you read page 11 of the data sheet, which has recommended amplifiers and circuits?
It helps to post more information, such as a link to the data sheet.
Yes, HMC1001 is about 3.2mV/V/gauss, so about 1 to 2 mV/V for Earth's ambient magnetic field, so
given 5V excitation about 5 to 10mV full-scale as a compass - any decent instrumentation amp will
work with this as its a straight-forward low-impedance Wheatstone bridge circuit. I suspect the
HX711 (inst. amp + ADC) would work for instance.
i have attached datasheet and my output calculation is based on second attachment(page 4 first graph).
(20m+15m)/40.51%= 43.75 MicroV. please correct me if my calculation is wrong.
may i know how can i calculate the minimum output voltage from HMC1001?
i am looking for a amplifier that has low noise level around 1 Hz.
and also use low pass filter between sensor and amplifier input t0 suppress noise at high frequency
luofan:
(20m+15m)/40.51%= 43.75 MicroV. please correct me if my calculation is wrong.
Your calculation does not properly use units. Also, the (20mV+15mV)/4Oe is the absolute value of the slopes of the two lines, but the source of the (0.5*1%)Oe is not obvious (to me).
@luofan and @636ll have the same IP and email addresses
The 6311 account has been banned and luofan can count himself lucky not to have been banned as well
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