• ADPD4100/ADPD4101 Medical grade

    Is ADPD4100/ADPD4101 belonging to Medical grade IC? 

  • RE: ADPD4101 errata and BPF question

    Hello HarjitS,

    The date code may vary depending on the manufacturing batch. The released part of the ADPD4100/4101 has ChipID 0x02C2. 


    Glen B. 

  • Q. ADPD4100/ADPD4101 power sequence problem?

    I have a question regarding the ADPD4100/ADPD4101.

    The customer made 6 boards of its own and all used ADPD4101.
    Three ADPD4101s operate normally, but the other three do not.
    (Sometimes it works normally.)

    When ADPD4101 does not operate normally, the…

  • Q. ADPD4101 total supply current (max.)


    How much current is required to operate all the functions of ADPD4101?

    The datasheet states that the maximum current is 400mA when multiple LED drivers are used simultaneously.

    It seems that it does not require a large current other than the LED…

  • How to drive the LED in ADPD4101 sensor?


    We are using ADPD4101 sensor which is using I2C interface. I am unable to drive the LED which is present in ADPD4101 sensor.

    I have attached my code snippet here. I am looking ahead for your suggestion on ADPD4101 sensor LED drive.

    int32_t adpd410x_reg_read…

  • ADPD4100/ADPD4101 Integrator chopping SUBTRACT_x and REVERSE_INTEG_x

    Would the bit pattern for these two fields ever be different? If so, why?


  • Question about the problem that ADPD4101 does not operate normally when power-up.

    My client made 6 of them using the parts below.
    -Part No. : ADPD4101BCBZR7
    -Date code: 2016

    After power-up, 3 of them operate normally (addr 0x08, value 0x2c2), but the remaining 3 are read as CHIP_ID (addr 0x08) as 0x0000.

    For reference, My client controlled…

  • Q. ADPD4101, The power sequence is changed and the green LED generates a peak noise.

    Hi Glen.

    The circuit was modified so that power is supplied simultaneously according to the power sequence recommended by ADI.

    When the green signal is measured in the changed circuit, peak noise occurs every 25 samples.

    From the FIFO, 25 samples of each…

  • RE: How to drive an OLED for PPG in ADPD4001?

    Hi there,

    The shunt resistor as a current divider may work. You may want to check the voltage drop across the OLED at your targeted current and then select a shunt resistor accordingly.

    The ADPD4001 and ADPD4101 are pin-to-pin compatible while ADPD4101…

  • RE: ADA2200 is EOL. Substitutes?

    Hi Shingo,

    I didn't see this when you first asked, but I wanted to mention a few other options. We have a couple Circuits from the Lab that do optical measurements with synchronous demodulation that it might be worth checking.

    CN0363 uses digital synch…