Looking to use the HMC409 and have run into questions not entirely answered on the data sheet or in the Application Notes.
I will be running this device off a +5v rail. It would be ideal to run Vcc1, Vcc2, Vpd and Vbais off this rail (with proper bypassing of course)
- It would be advantageous for my application to not use an active bais circuit with the HMC409. Is it sufficient to tie the Vbais pin (pin 9) straight to the +5V with only the recommended 100 pF bypass cap, C5, shown in the application circuit?
- An application note in the data sheet, "MMIC Amplifier Biasing Procedure Application Note" gives a start sequence for HBT Self-Biased Amplifier with Control Bias. The HMC409 has both Vpd and Vbais.
Could a start sequence for the HMC409 device be recommended?
- What sequence needs to be used in order to turn off the device.
- A max rating is not given for Vbais, I assume it is 5V?
Much thanks for the assistance, I want to avoid damaging one of these devices the first time I try turning it on on the bench.