{"id":6438,"date":"2026-06-16T03:43:33","date_gmt":"2026-06-16T03:43:33","guid":{"rendered":"https:\/\/materialparts.com\/ad8476brmz\/"},"modified":"2026-06-16T03:43:33","modified_gmt":"2026-06-16T03:43:33","slug":"ad8476brmz","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ad8476brmz\/","title":{"rendered":"AD8476BRMZ"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The AD8476BRMZ is a low-power, unity-gain fully differential amplifier and ADC driver from Analog Devices. Consuming only 330\u00b5A supply current, it provides precision gain of 1 with 200\u00b5V max output offset, 39nV\/\u221aHz noise, and -126dB HD2 at 10kHz. The VOCM pin sets the output common-mode voltage to match ADC input requirements, while \u00b118V overvoltage protection ensures robustness in industrial environments. Housed in 8-lead MSOP.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Gain<\/td>\n1 V\/V (unity, integrated resistors)<\/td>\n<\/tr>\n
Bandwidth<\/td>\n6MHz (-3dB)<\/td>\n<\/tr>\n
\u0645\u0639\u062f\u0644 \u0627\u0644\u062f\u0648\u0631\u0627\u0646<\/td>\n10 V\/\u00b5s<\/td>\n<\/tr>\n
Supply Current<\/td>\n330\u00b5A (typical)<\/td>\n<\/tr>\n
Output Offset Voltage<\/td>\n200\u00b5V max (B grade)<\/td>\n<\/tr>\n
\u0636\u0648\u0636\u0627\u0621 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\n39 nV\/\u221aHz<\/td>\n<\/tr>\n
HD2 \/ HD3<\/td>\n-126dB \/ -128dB @ 10kHz<\/td>\n<\/tr>\n
Gain Drift<\/td>\n1 ppm\/\u00b0C<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n3V to 18V single, \u00b11.5V to \u00b19V dual<\/td>\n<\/tr>\n
Overvoltage Protection<\/td>\nUp to \u00b118V beyond supplies<\/td>\n<\/tr>\n
\u0646\u0648\u0639 \u0627\u0644\u0625\u062e\u0631\u0627\u062c<\/td>\nDifferential, Rail-to-Rail<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n8-lead MSOP (3.0 x 3.0mm)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Ultra-low 330\u00b5A supply current<\/li>\n
  • Unity gain with integrated precision resistors<\/li>\n
  • VOCM pin for output common-mode voltage control<\/li>\n
  • Rail-to-rail differential outputs for maximum dynamic range<\/li>\n
  • Drives 16-bit ADCs up to 250kSPS<\/li>\n
  • 1ppm\/\u00b0C gain drift \u2014 excellent over temperature<\/li>\n
  • \u00b118V overvoltage protection beyond supply rails<\/li>\n
  • Single-ended to differential conversion<\/li>\n
  • Settles to 16-bit accuracy in 1\u00b5s<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Precision ADC driver for SAR and sigma-delta converters<\/li>\n
    • Single-ended to differential signal conversion<\/li>\n
    • Differential instrumentation amplifier building block<\/li>\n
    • Thermocouple and bridge sensor signal conditioning<\/li>\n
    • Battery-powered precision measurement<\/li>\n
    • Industrial process control front-ends<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AD8476BRMZ is a low-power, unity-gain fully differential amplifier and ADC driver from Analog Devices. Consuming only 330\u00b5A supply current, it provides precision gain of 1 with 200\u00b5V max output offset, 39nV\/\u221aHz noise, and -126dB HD2 at 10kHz. The VOCM pin sets the output common-mode voltage to match ADC input requirements, while \u00b118V […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,13],"tags":[],"chip_brand":[165],"class_list":["post-6438","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-adi"],"acf":{"brief_explanation":"Low-power fully diff amp G=1, 330\u00b5A, 6MHz, 39nV\/\u221aHz, VOCM pin, \u00b118V OVP, MSOP-8","date_code":"","package_case":"8-lead MSOP (3.0 x 3.0mm)","in_stock":4890,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/AD8476.pdf","price":"$3.62 @ 1ku","product_introduction":"The AD8476BRMZ is a very low power, unity-gain fully differential precision amplifier from Analog Devices, designed primarily as an ADC driver. With integrated gain-setting resistors for precise G=1, it converts single-ended inputs to differential outputs while the VOCM pin sets the output common-mode voltage to match the ADC's input range. The amplifier features only 330\u00b5A supply current, 200\u00b5V max output offset, 39nV\/\u221aHz noise density, and -126dB HD2, making it suitable for driving 16-bit ADCs at up to 250kSPS. Overvoltage protection up to \u00b118V beyond the supply rails ensures robustness in industrial environments where input signals may exceed the amplifier's supply voltage.","working_principle":"The AD8476 uses an internal op-amp with four precision-trimmed 10k\u03a9 resistors in a difference-amplifier configuration. The resistors set a fixed gain of 1 V\/V between the differential input and differential output. An internal common-mode feedback loop maintains output balance and suppresses even-order harmonic distortion. The VOCM pin is the input to this feedback loop; connecting it to the ADC's reference midpoint (e.g., VREF\/2) forces the AD8476's output common-mode to match the ADC's optimum input common-mode voltage. The output stage is a push-pull rail-to-rail design that can drive capacitive ADC input loads directly. The overvoltage protection uses internal ESD structures and current-limiting to tolerate input voltages up to 18V above or below the supply rails.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>VOCM<\/td>Output common-mode voltage set point<\/td><\/tr>
      2<\/td>VIN+<\/td>Non-inverting input (+IN)<\/td><\/tr>
      3<\/td>VIN-<\/td>Inverting input (-IN)<\/td><\/tr>
      4<\/td>-VS<\/td>Negative supply (or GND for single supply)<\/td><\/tr>
      5<\/td>+OUT<\/td>Positive differential output<\/td><\/tr>
      6<\/td>-OUT<\/td>Negative differential output<\/td><\/tr>
      7<\/td>+VS<\/td>Positive supply (3V to 18V)<\/td><\/tr>
      8<\/td>NC<\/td>No connect<\/td><\/tr><\/table>","application_scenarios":"
      • SAR ADC Driver:<\/b> Drive a 16-bit SAR ADC such as the AD7980 from a single-ended sensor. Connect the sensor to VIN+ and ground VIN- for single-ended-to-differential conversion. Tie VOCM to the ADC's VREF\/2 point to center the output common-mode. The 1\u00b5s settling to 16-bit accuracy matches SAR ADC acquisition times.<\/li>
      • Thermocouple Amplifier:<\/b> Use the AD8476 as the front-end for a K-type thermocouple measurement system. The differential input rejects common-mode noise picked up on the thermocouple leads. The \u00b118V overvoltage protection handles transients in industrial environments. Pair with a cold-junction compensator like the AD8495.<\/li>
      • Bridge Sensor Interface:<\/b> Connect a Wheatstone bridge's differential output to the AD8476 inputs. The precision G=1 preserves the bridge's millivolt output without gain error, while the VOCM pin levels the output to the ADC's input range. The 1ppm\/\u00b0C gain drift ensures measurement stability over temperature.<\/li><\/ul>","alternative_models":"
        Model<\/th>Gain<\/th>Current<\/th>Bandwidth<\/th>Key Difference<\/th><\/tr>
        AD8476ACPZ-R7<\/td>1<\/td>330\u00b5A<\/td>6MHz<\/td>LFCSP-16 package option<\/td><\/tr>
        ADA4940-1<\/td>1\/2<\/td>1.5mA<\/td>30MHz<\/td>Programmable gain, faster<\/td><\/tr>
        THS4551<\/td>Varying<\/td>1.4mA<\/td>27MHz<\/td>TI alternative, higher speed<\/td><\/tr>
        LMH6550<\/td>Varying<\/td>10mA<\/td>360MHz<\/td>Texas Instruments, very high speed<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=6438"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6438\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6438"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6438"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}