https://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-icProduct Detail Documentsen-USTelligent Community 12https://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-icFri, 05 May 2023 16:02:38 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c8322ea1-ef3e-4a3f-8ef8-aba443b60919e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-ic#commentsCurrent Revision posted to Documents by e14-publisher on 5/5/2023 4:02:38 PM<br /> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES39</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-6ddec" data-at-areainteracted="design-center" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('6ddec'));" data-farnell="2528321" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The MAXREFDES39# power amplifier (PA) bias reference design uses the MAX11300, also called a programmable mixed-signal I/O (PIXI&trade; IC), to bias and monitor a power amplifier for an RF base station application. In this case, an Infineon PTMA210152M-20W is used but any Power Amplifier can be used. <br /><br />The MAX11300 provides a highly integrated solution for the RF power amplifier biasing infrastructure. The design utilizes all of the MAX11300&rsquo;s analog peripherals, while only requiring one MAX11300 device to both bias and monitor a 2-stage RF power amp. <br /><br /> <p>The USB interface to the microcontroller and serial interface to the MAX11300 are digitally isolated from the main circuit through the MAX14850. The microcontroller section is powered through USB power, whereas the rest of the circuit is powered by a separate 36V DC supply. Figure 1 also shows power control and monitoring for RF PA.</p> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Monitor, biasing, and control for frequency division duplex (FDD) and time division duplex (TDD) radio frequency (RF) power amplifiers.</li> <li>Monitoring function <ul> <li>Accurate voltage and current measurement</li> <li>Current measurement through Maxim current-sense amplifier (MAX44285)</li> <li>Drain voltage and current of first- and second-stage amplifiers</li> <li>Two external and one internal temperature monitors</li> <li>Gate biasing of first-stage and second-stage amplifiers</li> </ul> </li> <li>Control function <ul> <li>Fast RF PA on/off</li> <li>Synchronized TDD function</li> <li>Efficient, adjustable drain voltage supply</li> <li>LED signaling and alarm</li> <li>Automatic control function</li> </ul> </li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX44285.pdf" target="_blank">MAX44285 Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX11300.pdf" target="_blank">MAX11300 PIXI, 20-Port Programmable Mixed-Signal I/O with 12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX14850.pdf" target="_blank">MAX14850 Six-Channel Digital Isolator (pdf)</a> </div> </div> </div> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3786, "type": "devtool", "part_number": "MAXREFDES39" };</script> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: power amplifier, MAX11300, mcu, maxim, development_platforms_kits, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-ic/revision/3Thu, 16 Dec 2021 23:33:47 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c8322ea1-ef3e-4a3f-8ef8-aba443b60919e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-ic#commentsRevision 3 posted to Documents by e14-publisher on 12/16/2021 11:33:47 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3786, "type": "devtool", "part_number": "MAXREFDES39" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES39</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-c761f" data-at-areainteracted="design-center" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c761f'));" data-farnell="2528321" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The MAXREFDES39# power amplifier (PA) bias reference design uses the MAX11300, also called a programmable mixed-signal I/O (PIXI&trade; IC), to bias and monitor a power amplifier for an RF base station application. In this case, an Infineon PTMA210152M-20W is used but any Power Amplifier can be used. <br /><br />The MAX11300 provides a highly integrated solution for the RF power amplifier biasing infrastructure. The design utilizes all of the MAX11300&rsquo;s analog peripherals, while only requiring one MAX11300 device to both bias and monitor a 2-stage RF power amp. <br /><br /> <p>The USB interface to the microcontroller and serial interface to the MAX11300 are digitally isolated from the main circuit through the MAX14850. The microcontroller section is powered through USB power, whereas the rest of the circuit is powered by a separate 36V DC supply. Figure 1 also shows power control and monitoring for RF PA.</p> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Monitor, biasing, and control for frequency division duplex (FDD) and time division duplex (TDD) radio frequency (RF) power amplifiers.</li> <li>Monitoring function <ul> <li>Accurate voltage and current measurement</li> <li>Current measurement through Maxim current-sense amplifier (MAX44285)</li> <li>Drain voltage and current of first- and second-stage amplifiers</li> <li>Two external and one internal temperature monitors</li> <li>Gate biasing of first-stage and second-stage amplifiers</li> </ul> </li> <li>Control function <ul> <li>Fast RF PA on/off</li> <li>Synchronized TDD function</li> <li>Efficient, adjustable drain voltage supply</li> <li>LED signaling and alarm</li> <li>Automatic control function</li> </ul> </li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX44285.pdf" target="_blank">MAX44285 Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX11300.pdf" target="_blank">MAX11300 PIXI, 20-Port Programmable Mixed-Signal I/O with 12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX14850.pdf" target="_blank">MAX14850 Six-Channel Digital Isolator (pdf)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: power amplifier, MAX11300, mcu, maxim, development_platforms_kits, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-ic/revision/2Thu, 16 Dec 2021 03:21:41 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c8322ea1-ef3e-4a3f-8ef8-aba443b60919e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-ic#commentsRevision 2 posted to Documents by e14-publisher on 12/16/2021 3:21:41 AM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3786, "type": "devtool", "part_number": "MAXREFDES39" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES39</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-59777" data-at-areainteracted="design-center" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('59777'));" data-farnell="" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The MAXREFDES39# power amplifier (PA) bias reference design uses the MAX11300, also called a programmable mixed-signal I/O (PIXI&trade; IC), to bias and monitor a power amplifier for an RF base station application. In this case, an Infineon PTMA210152M-20W is used but any Power Amplifier can be used. <br /><br />The MAX11300 provides a highly integrated solution for the RF power amplifier biasing infrastructure. The design utilizes all of the MAX11300&rsquo;s analog peripherals, while only requiring one MAX11300 device to both bias and monitor a 2-stage RF power amp. <br /><br /> <p>The USB interface to the microcontroller and serial interface to the MAX11300 are digitally isolated from the main circuit through the MAX14850. The microcontroller section is powered through USB power, whereas the rest of the circuit is powered by a separate 36V DC supply. Figure 1 also shows power control and monitoring for RF PA.</p> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Monitor, biasing, and control for frequency division duplex (FDD) and time division duplex (TDD) radio frequency (RF) power amplifiers.</li> <li>Monitoring function <ul> <li>Accurate voltage and current measurement</li> <li>Current measurement through Maxim current-sense amplifier (MAX44285)</li> <li>Drain voltage and current of first- and second-stage amplifiers</li> <li>Two external and one internal temperature monitors</li> <li>Gate biasing of first-stage and second-stage amplifiers</li> </ul> </li> <li>Control function <ul> <li>Fast RF PA on/off</li> <li>Synchronized TDD function</li> <li>Efficient, adjustable drain voltage supply</li> <li>LED signaling and alarm</li> <li>Automatic control function</li> </ul> </li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX44285.pdf" target="_blank">MAX44285 Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX11300.pdf" target="_blank">MAX11300 PIXI, 20-Port Programmable Mixed-Signal I/O with 12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX14850.pdf" target="_blank">MAX14850 Six-Channel Digital Isolator (pdf)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: power amplifier, MAX11300, mcu, maxim, development_platforms_kits, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-ic/revision/1Mon, 18 Oct 2021 20:24:44 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c8322ea1-ef3e-4a3f-8ef8-aba443b60919e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22379/reference-design-for-power-amplifier-biasing-through-max11300-pixi-ic#commentsRevision 1 posted to Documents by e14-publisher on 10/18/2021 8:24:44 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3786, "type": "devtool", "part_number": "MAXREFDES39" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x330_1579633383.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_power_amplifier_biasing_through_max11300_pixi_ic_500x492_1579633384.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for Power Amplifier Biasing through MAX11300 PIXI IC" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES39</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-91a6d" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('91a6d'));" data-farnell="2528321" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The MAXREFDES39# power amplifier (PA) bias reference design uses the MAX11300, also called a programmable mixed-signal I/O (PIXI&trade; IC), to bias and monitor a power amplifier for an RF base station application. In this case, an Infineon PTMA210152M-20W is used but any Power Amplifier can be used. <br /><br />The MAX11300 provides a highly integrated solution for the RF power amplifier biasing infrastructure. The design utilizes all of the MAX11300&rsquo;s analog peripherals, while only requiring one MAX11300 device to both bias and monitor a 2-stage RF power amp. <br /><br /> <p>The USB interface to the microcontroller and serial interface to the MAX11300 are digitally isolated from the main circuit through the MAX14850. The microcontroller section is powered through USB power, whereas the rest of the circuit is powered by a separate 36V DC supply. Figure 1 also shows power control and monitoring for RF PA.</p> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Monitor, biasing, and control for frequency division duplex (FDD) and time division duplex (TDD) radio frequency (RF) power amplifiers.</li> <li>Monitoring function <ul> <li>Accurate voltage and current measurement</li> <li>Current measurement through Maxim current-sense amplifier (MAX44285)</li> <li>Drain voltage and current of first- and second-stage amplifiers</li> <li>Two external and one internal temperature monitors</li> <li>Gate biasing of first-stage and second-stage amplifiers</li> </ul> </li> <li>Control function <ul> <li>Fast RF PA on/off</li> <li>Synchronized TDD function</li> <li>Efficient, adjustable drain voltage supply</li> <li>LED signaling and alarm</li> <li>Automatic control function</li> </ul> </li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX44285.pdf" target="_blank">MAX44285 Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX11300.pdf" target="_blank">MAX11300 PIXI, 20-Port Programmable Mixed-Signal I/O with 12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX14850.pdf" target="_blank">MAX14850 Six-Channel Digital Isolator (pdf)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: power amplifier, MAX11300, mcu, maxim, development_platforms_kits, reference_designs</div>