• RE: Connecting 3 LEDs Red, Green IR to ADPD105

    Hi there,

    The ADPD105 operates two independent time slots, Time Slot A and Time Slot B, allowing two measurements. You can only enable one LED driver in either Time Slot A or Time Slot B by setting proper bit in register 0x14. Unfortunately the ADPD105…

  • Heart Rate Variability measurement


    I would like to get a suggestion over HRV measurement.

    I am using the ADPD4101 sensor where I am getting clean PPG signal using IR LED.

    I have enabled FIFO Threshold Interrupt ( Watermark level = 384 bytes) to read the PPG signal from FIFO.

    I am…

  • RE: How to create an earphone PPG sensor

    Hello - 

    There are a couple of options for your earphone PPG sensor:

    - ADPD188GG: it is a module with two green LEDs and a photodiode. ADPD188GG Datasheet and Product Info | Analog Devices

    - ADPD4100/4101: it is our latest multimodal sensor front end for…

  • How to measure temperature with ADPD410x


    I'm a master student in biomedical engineering and I'm developping a miniature sensor for PPG, ECG and body temperature. For this I'm using the ADPD4101. I'm in the very first step of the project: the 2D schematics.

    I have seen in…

  • Does this eval board exist (CN0503)?


    We are designing a sensor for fluorometry. We have found the ADPD4000 to be suitable for our application.

    There was a video named 'CN0503 + ADPD4000 Liquid Analysis Platform by Analog Devices'. In the video, a CN0503 eval board was used.…

  • RE: Strange readings using the 180 degree sensor on the EVAL-CN0409-ARDZ

    Hi Karlsson,

    I wouldn't be surprised at the alignment - note that we're just relying on the LED's built-in lens, nothing fancy. It's intended as a reference design for customers that would eventually be using their own optics. As you have demonstrated…

  • Question on how to reduce DC offset in PPG measurement of ADPD410x

    My customer is using ADPD4101.
    In the following situation, please advise on how to reduce the DC offset in the PPG signal.

    - Measured AC level is about -20~+20 (ADC max = 65535)
    - DC value is already ~ 44000, which is 2/3 of ADC max.
    -> We cannot increase…

  • Question about Two-Electrode Lead Off Measurement


    I am prototyping a device which will be able to measure ECG and two-electrode lead off. To do so I use the ADPD4101 but I am in trouble with your recommended configuration for ECG measurement with low DC offset. It concerns the INTEG_WIDTH_x, INTEG_OFFSET_x…

  • ADPD4100Z led is not blinking

    Hi sir,

    i am working with adpd4100z  device, i am able  communicate with device through SPI . I have done device configuration registers below mentioned  but led is not blinking.

    LED drive i have configured 0x0106 register i selected led3b and led 4b  ,A…

  • Question on whether setting can be changed without reset during PPG measurement in ADPD410x

    During PPG measurement in ADPD410x, we ask if the following settings can be changed without reset.
    (1) LED intensity
    (2) Number of Pulses
    (3) Time slot
    (4) TIA gain

    Any advice would be appreciated.