I'm using ADAS1000 and ADAS1000-1 chips to measure 12-Leads ECG.
There are some quesions:
1、 Does the chips need to be calibrated by user?
2、How can cut off the 1.3v VCM_REF connect to the INPUT AMP?
Thanks for your answer a lot.
I had read the datasheet carfully again,and there is no question now.
I have got the Voltage which I wanted through Calibration DAC,and it can by send to CAL_DAC_IO.
I just want to know what should I do next to achive the chip calibration.
There is my own config about CALDAC register:
CALDATA[[9:0] = 0x55
CALDACEN = 1
CALINT = 1,this bit means Only the clibration DAC is connected to the ECG channel
CALMODEEN = 0
CALCHPEN = 1 ,enable the chop clock
Does it correct?
Wait for ADI engineers support.
The chip will work even without the users calibration. If you check USRCAL (CALXX) on table 51, setting it to 0 will write the factory calibration value into the register.
I can't answer the second question above. The support for this product is currently on holidays so we might have to wait until she return. I'll still try to for answers if this is possible.
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