The data sheet for the HMC907 RF power amplifier lists IP3 for several frequency ranges. What can we expect for IP3 in the 20-50 KHz range, typical and minimum? Thanks and Best Regards,
-Tim Starr on behalf of BJ@TR
I can check to see if we have data for that frequency range but it would help to know...are you working with the die or with the packaged part? Are you aware that both are LTB?
The answer is: the packaged part. Actually I realize now the part I asked about is 0.2-22GHz. I should have asked about the HMC659, and/or HMC480 since these have response down to DC. Sorry about that. Your prompt response would be appreciated! Is there a rule of thumb? we can use?
PS I am aware of the fact that this part is LTB. I amazes and confounds me that ADI does not list the replacement (packaged) part on their web site. Is it not true that the HMC907A will become available as a drop in replacement sometime in the near future?
We don't have a rule of thumb for determining the lowest frequency of our IP3 data. For some parts we measure IP3 as low as tens of MHz and for other parts we don't measure quite as low. Many parts can technically operate down to *DC* but still require DC blocks so as to not load down the gate and/or drain biases. For those parts we usually use very wideband coaxial models which have their own low frequency limits.
In the case of the HMC907 product page (see link below), a replacement actually is listed...though it's hidden!
To see it, you'll need to click on "Show More..." (as shown below). That said, I agree that our website needs much improvement. We have not yet published the expected release dates for the HMC907A products.
I will redirect your HMC659 and HMC480 requests toward the Apps Engineer who supports them.
I've been told by the product line that the HMC907A packaged part is expected to release in March 2017.
Both HMC480ST89 and HMC659LC5 are DC coupled devices, you can you them down to couple of kHz with necessary biasing components, like Sean mentioned on above posts.
We have OIP3 data for HMC480ST89 down to 100 MHz, it is typically 37.5 dBm, which is 1.5 dB more than 500 MHz OIP3 point on the datasheet plot. I expect the OIP3 around 20 kHz to be typically more than 35 dBm.
We do not have any OIP3 data at frequencies lower than 500 MHz. Based on past experience with similar devices, I think you can get 35 dBm OIP3 at 20 kHz out of HMC659LC5. It would be better to test and verify though.
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