MAXM86146CFU+: FAQ

Created over 6 years ago

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Accelerometer Recommendation for the MAXM86146

According to the documentation available in the MAXM86146 software package, the internal microcontroller has drivers for the only 2 accelerometers: KX122 and the LIS2DS12. However, an alternative is…
Can the MAXM86146 capture the SPO2 data while the user is running?

By definition, SPO2 data should be measured while the user is at rest, but the MAXM86146 will still work while the user is running.
Does the AFE_gpio1 pin on the MAXM86146 have an internal pull-up resistor?

The AFE_GPI pin of the MAXM86146 does not have an internal pull-up resistor. In this case, an external pull up resistor is needed to, as the GPIO is open-drain (active low) when used as an output.
Does the MAXM86146 AFE_GPIO1 pin have an internal pull-up resistor?

The AFE_GPI pin of the MAXM86146 does not have an internal pull-up resistor. In this case, an external pull up resistor is needed to, as the GPIO is open-drain (active low) when used as an output as shown…
External Clock Requirements for MAXM86146 for 32KIN Pin

The V IH and V IL levels for the 32KIN pin should be the same as the GPIO, but since this pin is not characterized specifically during production, the voltage tolerances for this pin as well as its rising…
From the MAXM86146 datasheet, the pin no 34 is NC pin and in the EVkit datasheet that pin is connected to the controller. Is it really required to connect to the controller?

No, its not required to connect to the controller.
What is the difference between AGC and AEC?

AGC is a subset of AEC. In AEC, the MAXM86146 controls most of the AFE's settings, while in AGC, you need to control the PD (Photodiode) current. The best fit between AGC and AEC depends on your algorithm…
What is the Photodiode arrangement of the MAXM86146 IC?

Here are the details of the spacing of the PDs integrated with the MAXM86146: The recommended spacing between Green LED and PD active edge is 2.5mm, and for RED and IR LEDs and Active Edge of the PD…
Where can I find the registers for the MAXM86146?

The MAXM86146 integrates both the MAX86141 and MAX32664 into a single package. Therefore, you can refer to the register documentation for those components when working with the MAXM86146.

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MAXM86146CFU+: FAQ

Accelerometer Recommendation for the MAXM86146

Can the MAXM86146 capture the SPO2 data while the user is running?

Does the AFE_gpio1 pin on the MAXM86146 have an internal pull-up resistor?

Does the MAXM86146 AFE_GPIO1 pin have an internal pull-up resistor?

External Clock Requirements for MAXM86146 for 32KIN Pin

From the MAXM86146 datasheet, the pin no 34 is NC pin and in the EVkit datasheet that pin is connected to the controller. Is it really required to connect to the controller?

What is the difference between AGC and AEC?

What is the Photodiode arrangement of the MAXM86146 IC?

Where can I find the registers for the MAXM86146?

Before You Switch