RF Power Management Attach Training Module

Editor's Notes

• #3: This is giving the agenda of the RF Power Management Attach MTM. RF Power Managemenmt Attach is a very important initiative for ADI. This is an area where spezialized low noise power solutions are key. Also, as the provider for high ASP RF solutions, we can easily sell the correct and in many cases prooven and tested power management solution with it.
• #4: ADI has a very good position to attach our power solutions to all of the high end and market leading Ex Hittite portfolio. In the list on this slide, all the good reasons are mentioned, why RF Power Management Attach is working well.
• #5: This slide is showing one typical RF block diagram signal chain of a vector signal analysis system for IAD (Instrumentation, Aerospace and Defense). Many different RF blocks are shown that also are used in other RF systems. This gives us an idea, of how many different blocks need power. Some blocks need absolutely lowest noise power and others just need the right voltage. Also interesting, such systems do not only need power for the RF components, we can very well use our PMUs and other DC/DC converters for the blocks on the right: interfaces, processors, displays and many more.
• #6: Here we can see all the different product areas in which we do the core power management attach. The most differentiating are the ultra low noise LDOs. Later in this presentation, on the competitive slides, we can find many details on why and how we differentiate. Just the LDOs by themselves do not represent the complete solution for a system. Usually some preregulation is needed. We have a good portfolio of DC to DC converters coming from a 24V, 12V or 5V rail. Another highlight is our family of low noise inverting regulators to generate negative voltages. A new version with an interleaved negative charge pump will be released during 2016. Finally our Power Managementz Units (uPMUs) are very usefull for teh generation of multiple different voltages in such a system. They also help to maintain lowest noise, by all teh included switching regulators to share one switching frequency and the different regulators to opperate out of phase. This reduces teh AC current on teh input line and thus calms down any switching regulator.
• #7: Here we go into the individual power requirements of each block of an RF signal chain. Low noise power management is key for many of these blocks.
• #8: Same as on the slide before. Here we look at detectors, transceivers, power amplifiers (PAs) and HDR products.
• #9: This is the last slide on requirements for RF blocks. It contains control products and frequency conversion products.
• #10: In data transmission, we can easily see, how a signal needs to have very low jitter so that high data rates are possible. Low noise power management reduces the jitter amount in such systems.
• #11: Here we look at the first example. It is the AD936x software defined radio chip. The table lists specifically all the different voltage rails needed for such a device. Below teh table, we can see a few screenshots of the detailed power management documentation for the chip. This documentation is part of the AD936x development package.
• #12: The block diagram shows one real solution on how the transceiver section of the ADP936x can be powered. It uses one ADP5040 for the general purpose input output rail, another linear regulator for the Vdd interface and the 1.2A buck reguzlator in combination with an ultra low noise ADP1755 for the 1.3V core voltage. This proposal is ioptimized to run off a 5V rail.
• #13: The second RF power management attch example is the new AD9370 transceiver. This slide shows different voltage domains which need powering.
• #14: Here we can see an option which is available in many different RF designs. There is one conservative version on the left. Here each different power rail of the chip is powered by a seperate DC/DC converter. This helps to decouple AC loads from each other. It will prevent cross coupling between different areas of the AD9370 chip. For very high performance systems this is the optimum solution. On teh right side, we can see an optimized power design. Here, multiple different power rails all come from one single DC/DC converter. This can save cost and space. However, care must be taken, so that different rails are not influenced by each other. Performance might need to be thoroughly checked. On both designs, a 12V input voltage rail is supported.
• #15: The third example is showing the AD9162 Barium 12 GSPS 16 bit RF DAC. It is being powered by a few different positive ultra low power LDOs. Some of teh voltage rails for teh input of teh LDOs are generated by a ADP5054 for highest system power efficiency. A negative voltage is generated with the ADP5073 and then it is post filtered with the ADP7183, our new ultra low noise negative LDO. Release date March 2016. With this power supply, the AD9162 will get the best performance.
• #16: One VCO example with our best in class LDO ADM7150. For VCOs it is especially important to provide very clean supplies. Noise on the power supply will couple into the system as phase noise and is very difficult to get rid of. The total system quality heavily depends on clean supply rails for the VCO. Also an interesting thought, the power management BOM cost can be quite high for such applications.
• #17: The 5th example is showing a power supply for a power stage with different process technologies. LDMOs are the standard components which are relatively low cost. GaN technology is more costly, but much more power efficient. Such drivers need negative voltages which need to be extremely clean.
• #18: Besides the right RF component and the best power supply from ADI, often filters are needed to clean up remaining noise. Here we see some prefiltering and post filtering of the ADP1740 LDO powering an AD9369. While we do notz sell LC filters, we do give suggestions as part of our power mangement attach package.
• #19: The ADP5003 is one of the key new developments for RF Attach. It is a 3A switchingh regulator which can run off a 12V or 5V input voltage rail. The output is generated in a very low noise way,. Than this voltage is fed into the input of an integrated post filtering ultra low noise LDO. This solution guarantees very low noise and highest power efficiency. Depending on load current, the output voltage of the switcher can dynamically be adjusted to give the lowest dropout voltage on the LDO, but also the lowest noise and highest power supply rejection ratio (PSRR) possible. This device will be released in July 2016.
• #20: When it comes to further information, there are some sources on the topic of power management RF attach. However, what is still missing, is a hyperlinked presentation summarizing a lot of the detailed information needed to power different RF products. This presentation is beeing put together right now. The MTM you are looking at right now, can not go into more technical detail. The new presentation will however.
• #21: Jut a sumary of what we learned. This presentation will be updated over time, as things evolve. Thank you for your attention.