HMC920LP5E Biasing issue

We are planning to use HMC920 SMT type for biasing following components.

1.HMC8410

2.ADRF5020

3.HMC460LC5

We are finding some issues in handling HMC920 active bias controller.We are not able to get required drain and gate voltage.We have followed the circuit provided in the datasheet as simplified circuit.What are the checklist to be followed to operate hmc920.We have application note of the component also,but we could debug the error.So please suggest us the application circuit of HMC920 for the above amplifiers and switch and suggest us some thumb rules to deg the ic performances.

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  • Hi,

    Attached is the application circuit to bias HMC460 with HMC920.

    The application note, AN-1363 also has some example circuits. And the formulas required to calculate the external component values. If you can share your apps circuit for HMC8410, we can comment further.

    As for ADRF5020, that is a switch. Using a voltage inverter would be simpler,

    If there is +5V available in the system, a voltage inverter (ADM8828/ADM8829 or similar) can be used to generate -5V.

    If the positive supply available in the system is not equal to 5V, a voltage converter (ADM660/ADM88660 or similar) can be used to generate -5V.

    Best,

    Kagan

    depl_master_appscircuit_HMC920LP5E-HMC460LC5.pdf
Reply
  • Hi,

    Attached is the application circuit to bias HMC460 with HMC920.

    The application note, AN-1363 also has some example circuits. And the formulas required to calculate the external component values. If you can share your apps circuit for HMC8410, we can comment further.

    As for ADRF5020, that is a switch. Using a voltage inverter would be simpler,

    If there is +5V available in the system, a voltage inverter (ADM8828/ADM8829 or similar) can be used to generate -5V.

    If the positive supply available in the system is not equal to 5V, a voltage converter (ADM660/ADM88660 or similar) can be used to generate -5V.

    Best,

    Kagan

    depl_master_appscircuit_HMC920LP5E-HMC460LC5.pdf
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