https://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-outputProduct Detail Documentsen-USTelligent Community 12https://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-outputFri, 05 May 2023 16:02:58 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e615fdab-6b47-425d-aec0-bf41e2f961efe14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-output#commentsCurrent Revision posted to Documents by e14-publisher on 5/5/2023 4:02:58 PM<br /> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output</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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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">MAXREFDES75</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-31974" 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('31974'));" data-farnell="2530537" 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"> Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter.<br /><br /> The MAXREFDES75# brings a full 24-bit ADC into a high-performance system performing small-signal (down to &plusmn;25mV full scale) 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal.<br /><br />The signal chain begins with the sensor signal feeding directly into the MAX11270. No external op amp is necessary because the PGA is integrated in the MAX11270. Following isolation via the MAX14850, the MAXQ622 reads the input signal, applies zero-offset and weight-factor, and presents the resulting weight. The MAXQ622 calculates a DAC value, based on DAC calibration and output range mapping and writes this to the DAC. </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Ratiometric measurement or measurement compared to a precision voltage reference</li> <li>User-programmable offset and gain calibration for sensor (load cell)</li> <li>User-programmable offset and gain calibration for DAC</li> <li>User-programmable voltage output range mapping</li> </ul> <p><strong>MAX11270</strong></p> <ul> <li>24-bit resolution, 64ksps</li> <li>6nV/&radic;Hz Integrated programmable-gain amplifier (PGA) with gains up to 128</li> </ul> <p><strong>MAX542</strong></p> <ul> <li>16-bit resolution with no missing codes</li> <li>High accuracy: INL &plusmn;2 LSB (max)</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/MAX11270.pdf" target="_blank">MAX11270 24-Bit, 10mW, 130dB SNR, 64ksps Delta-Sigma ADC with Integrated PGA (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX541-MAX542.pdf" target="_blank">MAX542 5V, Serial-Input, Voltage-Output 16-Bit DACs (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Applications Library</h4> <div class="attachment "> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_CALIBRATION_GUI_RA.zip" target="_blank">Calibration GUI (zip)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_FIRMWARE_RA.zip" target="_blank">MAXQ622 Platform (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_BOM_RA.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES75 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Design Package</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/RD75V01_00.zip" target="_blank">Design Files for MAXREFDES75 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_SCH_RA.pdf" target="_blank">Schematic for MAXREFDES75 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_LAYOUT_RA.pdf" target="_blank">PCB Layout for MAXREFDES75 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES75_GERBER_RA.ZIP" target="_blank">PCB Gerber for MAXREFDES75 (zip)</a> </div> </div> </div> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3828, "type": "devtool", "part_number": "MAXREFDES75" };</script> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: dac, digital to analog converter, analog to digital converter, mcu, maxim, development_platforms_kits, adc, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-output/revision/3Thu, 16 Dec 2021 23:34:08 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e615fdab-6b47-425d-aec0-bf41e2f961efe14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-output#commentsRevision 3 posted to Documents by e14-publisher on 12/16/2021 11:34:08 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3828, "type": "devtool", "part_number": "MAXREFDES75" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output</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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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">MAXREFDES75</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-d4748" 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('d4748'));" data-farnell="2530537" 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"> Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter.<br /><br /> The MAXREFDES75# brings a full 24-bit ADC into a high-performance system performing small-signal (down to &plusmn;25mV full scale) 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal.<br /><br />The signal chain begins with the sensor signal feeding directly into the MAX11270. No external op amp is necessary because the PGA is integrated in the MAX11270. Following isolation via the MAX14850, the MAXQ622 reads the input signal, applies zero-offset and weight-factor, and presents the resulting weight. The MAXQ622 calculates a DAC value, based on DAC calibration and output range mapping and writes this to the DAC. </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Ratiometric measurement or measurement compared to a precision voltage reference</li> <li>User-programmable offset and gain calibration for sensor (load cell)</li> <li>User-programmable offset and gain calibration for DAC</li> <li>User-programmable voltage output range mapping</li> </ul> <p><strong>MAX11270</strong></p> <ul> <li>24-bit resolution, 64ksps</li> <li>6nV/&radic;Hz Integrated programmable-gain amplifier (PGA) with gains up to 128</li> </ul> <p><strong>MAX542</strong></p> <ul> <li>16-bit resolution with no missing codes</li> <li>High accuracy: INL &plusmn;2 LSB (max)</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/MAX11270.pdf" target="_blank">MAX11270 24-Bit, 10mW, 130dB SNR, 64ksps Delta-Sigma ADC with Integrated PGA (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX541-MAX542.pdf" target="_blank">MAX542 5V, Serial-Input, Voltage-Output 16-Bit DACs (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Applications Library</h4> <div class="attachment "> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_CALIBRATION_GUI_RA.zip" target="_blank">Calibration GUI (zip)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_FIRMWARE_RA.zip" target="_blank">MAXQ622 Platform (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_BOM_RA.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES75 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Design Package</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/RD75V01_00.zip" target="_blank">Design Files for MAXREFDES75 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_SCH_RA.pdf" target="_blank">Schematic for MAXREFDES75 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_LAYOUT_RA.pdf" target="_blank">PCB Layout for MAXREFDES75 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES75_GERBER_RA.ZIP" target="_blank">PCB Gerber for MAXREFDES75 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: dac, digital to analog converter, analog to digital converter, mcu, maxim, development_platforms_kits, adc, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-output/revision/2Thu, 16 Dec 2021 03:22:06 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e615fdab-6b47-425d-aec0-bf41e2f961efe14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-output#commentsRevision 2 posted to Documents by e14-publisher on 12/16/2021 3:22:06 AM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3828, "type": "devtool", "part_number": "MAXREFDES75" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output</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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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">MAXREFDES75</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-90db4" 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('90db4'));" 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"> Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter.<br /><br /> The MAXREFDES75# brings a full 24-bit ADC into a high-performance system performing small-signal (down to &plusmn;25mV full scale) 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal.<br /><br />The signal chain begins with the sensor signal feeding directly into the MAX11270. No external op amp is necessary because the PGA is integrated in the MAX11270. Following isolation via the MAX14850, the MAXQ622 reads the input signal, applies zero-offset and weight-factor, and presents the resulting weight. The MAXQ622 calculates a DAC value, based on DAC calibration and output range mapping and writes this to the DAC. </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Ratiometric measurement or measurement compared to a precision voltage reference</li> <li>User-programmable offset and gain calibration for sensor (load cell)</li> <li>User-programmable offset and gain calibration for DAC</li> <li>User-programmable voltage output range mapping</li> </ul> <p><strong>MAX11270</strong></p> <ul> <li>24-bit resolution, 64ksps</li> <li>6nV/&radic;Hz Integrated programmable-gain amplifier (PGA) with gains up to 128</li> </ul> <p><strong>MAX542</strong></p> <ul> <li>16-bit resolution with no missing codes</li> <li>High accuracy: INL &plusmn;2 LSB (max)</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/MAX11270.pdf" target="_blank">MAX11270 24-Bit, 10mW, 130dB SNR, 64ksps Delta-Sigma ADC with Integrated PGA (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX541-MAX542.pdf" target="_blank">MAX542 5V, Serial-Input, Voltage-Output 16-Bit DACs (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Applications Library</h4> <div class="attachment "> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_CALIBRATION_GUI_RA.zip" target="_blank">Calibration GUI (zip)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_FIRMWARE_RA.zip" target="_blank">MAXQ622 Platform (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_BOM_RA.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES75 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Design Package</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/RD75V01_00.zip" target="_blank">Design Files for MAXREFDES75 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_SCH_RA.pdf" target="_blank">Schematic for MAXREFDES75 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_LAYOUT_RA.pdf" target="_blank">PCB Layout for MAXREFDES75 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES75_GERBER_RA.ZIP" target="_blank">PCB Gerber for MAXREFDES75 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: dac, digital to analog converter, analog to digital converter, mcu, maxim, development_platforms_kits, adc, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-output/revision/1Mon, 18 Oct 2021 20:25:07 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e615fdab-6b47-425d-aec0-bf41e2f961efe14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22413/reference-design-for-24-bit-weigh-scale-with-a-16-bit-dac-0-to-10v-output#commentsRevision 1 posted to Documents by e14-publisher on 10/18/2021 8:25:07 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3828, "type": "devtool", "part_number": "MAXREFDES75" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output</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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x226_1579633414.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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_24bit_weigh_scale_with_a_16bit_dac_0_to_10v_output_500x321_1579633414.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output" /> </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">MAXREFDES75</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-64006" 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('64006'));" data-farnell="2530537" 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"> Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter.<br /><br /> The MAXREFDES75# brings a full 24-bit ADC into a high-performance system performing small-signal (down to &plusmn;25mV full scale) 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal.<br /><br />The signal chain begins with the sensor signal feeding directly into the MAX11270. No external op amp is necessary because the PGA is integrated in the MAX11270. Following isolation via the MAX14850, the MAXQ622 reads the input signal, applies zero-offset and weight-factor, and presents the resulting weight. The MAXQ622 calculates a DAC value, based on DAC calibration and output range mapping and writes this to the DAC. </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Ratiometric measurement or measurement compared to a precision voltage reference</li> <li>User-programmable offset and gain calibration for sensor (load cell)</li> <li>User-programmable offset and gain calibration for DAC</li> <li>User-programmable voltage output range mapping</li> </ul> <p><strong>MAX11270</strong></p> <ul> <li>24-bit resolution, 64ksps</li> <li>6nV/&radic;Hz Integrated programmable-gain amplifier (PGA) with gains up to 128</li> </ul> <p><strong>MAX542</strong></p> <ul> <li>16-bit resolution with no missing codes</li> <li>High accuracy: INL &plusmn;2 LSB (max)</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/MAX11270.pdf" target="_blank">MAX11270 24-Bit, 10mW, 130dB SNR, 64ksps Delta-Sigma ADC with Integrated PGA (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX541-MAX542.pdf" target="_blank">MAX542 5V, Serial-Input, Voltage-Output 16-Bit DACs (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Applications Library</h4> <div class="attachment "> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_CALIBRATION_GUI_RA.zip" target="_blank">Calibration GUI (zip)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_FIRMWARE_RA.zip" target="_blank">MAXQ622 Platform (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_BOM_RA.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES75 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Design Package</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/RD75V01_00.zip" target="_blank">Design Files for MAXREFDES75 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_SCH_RA.pdf" target="_blank">Schematic for MAXREFDES75 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5985/MAXREFDES75_LAYOUT_RA.pdf" target="_blank">PCB Layout for MAXREFDES75 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES75_GERBER_RA.ZIP" target="_blank">PCB Gerber for MAXREFDES75 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: dac, digital to analog converter, analog to digital converter, mcu, maxim, development_platforms_kits, adc, reference_designs</div>