Part Number: AFE4490 Tool/software:
Greetings,
We are conducting research and development related to pulse oximetry and are using your AFE4490 pulse oximetry product.
We would like to inquire about the actual bias voltage applied to the photodetector…
Part Number: AFE4490 Tool/software: First Here is datasheet to use this case.
www.ti.com/.../afe4490.pdf
What I want to do: I want to set the AFE4490 datasheet Figure 116. LEDCNTRL: LED Control Register (Address = 22h, Reset Value = 0000h) and control…
Part Number: AFE4490 Dear Sir/Madam,
I purchased AFE4490SPO2EVM and tested its SNR. I have questions about this AFE's SNR performance.
I was looking for the SNR measurements in the datasheet, and it seems that SNR was presented as noise-free bits…
Part Number: AFE4490 Hello TI team,
We are currently developing an SpO2 device using the AFE4490 with an STM32 MCU. We have conducted tests using a simulator and a reference SpO2 machine.
During our tests, we observed discrepancies in the data acquisition…
Part Number: AFE4490 Dear Expert
The AFE4490 circuit is designed according to TI's recommended circuit and works normally in indoor environments; 1. Place the AFE4490 module board into the freezer (at a temperature of about 3 degrees Celsius) (the…
Part Number: AFE4490 Hello, I have a question about the bypass mode. I see that bypass is suitable for bypassing normal procedures. If I don’t need it, can I connect it empty. Below is my circuit diagram,Could you please check it out for me?
Part Number: AFE4490 Other Parts Discussed in Thread: AFE4403 I been doing data conversion with the goal of SpO2 from the link provided below:
https://www.ti.com/lit/an/slaa655/slaa655.pdf
My values have been varying depending on the gains of both the…
Part Number: AFE4490SPO2EVM To my understanding, calculating SpO2 is given by the general formula of % SpO2 = 110 – 25 × R, where R = (ACrms of Red / DC of Red) / (ACrms of IR / DC of IR). I have been trying to figure out the SpO2 but have…
