{"id":6450,"date":"2026-06-16T03:48:43","date_gmt":"2026-06-16T03:48:43","guid":{"rendered":"https:\/\/materialparts.com\/ad8226arz\/"},"modified":"2026-06-16T03:48:43","modified_gmt":"2026-06-16T03:48:43","slug":"ad8226arz","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ad8226arz\/","title":{"rendered":"AD8226ARZ"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The AD8226ARZ is a low-cost, wide-supply-range instrumentation amplifier from Analog Devices with rail-to-rail output. Operating from a single 2.2V to 36V supply (or dual \u00b11.35V to \u00b118V), it sets gain from 1 to 1000 with one external resistor. The input range extends below the negative supply, and inputs tolerate \u00b135V beyond the rails with \u00b15V supplies. With 90dB CMRR (B grade), 1.5MHz bandwidth, and 350\u00b5A supply current, it is ideal for industrial and portable multi-channel applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Gain Range<\/td>\n1 to 1000 (single resistor)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.2V to 36V single, \u00b11.35V to \u00b118V dual<\/td>\n<\/tr>\n
Bandwidth (G=1)<\/td>\n1.5 MHz<\/td>\n<\/tr>\n
CMRR (G=1, B grade)<\/td>\n90 dB minimum<\/td>\n<\/tr>\n
Input Voltage Noise<\/td>\n22 nV\/\u221aHz<\/td>\n<\/tr>\n
Supply Current<\/td>\n350 \u00b5A (typical)<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n125\/50 \u00b5V (A\/B grade max at \u00b115V)<\/td>\n<\/tr>\n
Input Overvoltage<\/td>\n\u00b135V beyond supplies (with \u00b15V supply)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7c7b\u578b<\/td>\nRail-to-Rail<\/td>\n<\/tr>\n
Input Range<\/td>\nExtends below negative supply<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n8-SOIC (3.9 x 4.9mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Wide supply range: 2.2V to 36V single supply<\/li>\n
  • Gain of 1 to 1000 with one external resistor<\/li>\n
  • Rail-to-rail output for maximum dynamic range<\/li>\n
  • Input voltage extends below negative supply<\/li>\n
  • Input overvoltage protection to \u00b135V beyond rails<\/li>\n
  • 90 dB minimum CMRR (B grade)<\/li>\n
  • Only 350\u00b5A supply current<\/li>\n
  • Minimum gain of 1 handles \u00b110V signals<\/li>\n
  • Minimum and maximum input bias currents specified for open-wire detection<\/li>\n
  • Available in SOIC and MSOP packages<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial process control<\/li>\n
    • Bridge amplifiers for load cells and pressure sensors<\/li>\n
    • Medical instrumentation<\/li>\n
    • Portable data acquisition<\/li>\n
    • Multi-channel signal conditioning<\/li>\n
    • Single-supply sensor interfaces<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AD8226ARZ is a low-cost, wide-supply-range instrumentation amplifier from Analog Devices with rail-to-rail output. Operating from a single 2.2V to 36V supply (or dual \u00b11.35V to \u00b118V), it sets gain from 1 to 1000 with one external resistor. The input range extends below the negative supply, and inputs tolerate \u00b135V beyond the rails […]<\/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-6450","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-adi"],"acf":{"brief_explanation":"Wide-supply in-amp, 2.2-36V, G=1-1000, 90dB CMRR, R-R output, \u00b135V OVP, 350\u00b5A, 8-SOIC","date_code":"","package_case":"8-SOIC (3.9 x 4.9 x 1.5mm)","in_stock":4560,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/AD8226.pdf","price":"$1.48 @ 1ku","product_introduction":"The AD8226ARZ is a low-cost, wide-supply-range instrumentation amplifier from Analog Devices that requires only one external resistor to set any gain from 1 to 1000. Its wide input range extends below the negative supply, enabling single-supply amplification of near-ground signals without level shifting. The rail-to-rail output maximizes dynamic range. Input protection tolerates voltages up to \u00b135V beyond the supply rails (with \u00b15V supplies), making it robust in industrial environments with transient overvoltages. The minimum gain of 1 allows direct handling of \u00b110V signals without attenuation. With only 350\u00b5A supply current and operation from 2.2V to 36V, the AD8226 suits both battery-powered portables and industrial 24V systems. Open-wire detection is facilitated by specified minimum and maximum input bias currents.","working_principle":"The AD8226 uses an indirect current-feedback architecture. Unlike traditional three-op-amp in-amps, the input stage converts the differential input voltage to a current through a transconductance amplifier. This current is mirrored to the output stage where it is converted back to a voltage through a feedback amplifier. The gain-setting resistor RG determines the transconductance ratio: G = 1 + (49.4k\u03a9\/RG). The indirect current-feedback topology provides several advantages: the input common-mode range is independent of the gain and reference voltage, the output can swing rail-to-rail, and the input can extend below the negative supply. The input protection uses series resistors and clamp diodes to tolerate voltages well beyond the supply rails without damage. The REF pin adds a DC offset to the output, useful for level-shifting in single-supply applications.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>-IN<\/td>Inverting input<\/td><\/tr>
      2<\/td>RG<\/td>Gain resistor terminal 1<\/td><\/tr>
      3<\/td>RG<\/td>Gain resistor terminal 2<\/td><\/tr>
      4<\/td>+IN<\/td>Non-inverting input<\/td><\/tr>
      5<\/td>-VS<\/td>Negative supply (or GND for single supply)<\/td><\/tr>
      6<\/td>REF<\/td>Reference (output offset) input<\/td><\/tr>
      7<\/td>VOUT<\/td>Amplifier output (rail-to-rail)<\/td><\/tr>
      8<\/td>+VS<\/td>Positive supply (2.2V to 36V)<\/td><\/tr><\/table>","application_scenarios":"
      • Single-Supply Bridge Amplifier:<\/b> Connect a 350\u03a9 load cell excited by 5V to the AD8226 powered from a single 5V supply. The input range extends below ground, so the bridge output near 2.5V common-mode is well within range. Set G=100 with RG = 499\u03a9. The rail-to-rail output swings from near 0V to near 5V, maximizing ADC dynamic range. The \u00b135V input overvoltage protects against ESD and miswiring during installation.<\/li>
      • 24V Industrial 4-20mA Loop Receiver:<\/b> Use the AD8226 to sense the voltage across a precision shunt resistor in a 4-20mA current loop. The 36V maximum supply allows direct operation from the 24V loop supply. The input below-ground capability handles ground-loop offsets. The 90dB CMRR rejects common-mode noise on the loop.<\/li>
      • Multi-Channel Portable Data Acquisition:<\/b> At only 350\u00b5A per channel, eight AD8226 channels draw less than 3mA total \u2014 negligible in a battery-powered data logger. The MSOP package option (AD8226ARMZ) saves board space. The specified minimum bias current allows detection of open sensor wires by monitoring for zero bias current.<\/li><\/ul>","alternative_models":"
        Model<\/th>Supply Range<\/th>Gain Range<\/th>IQ<\/th>Key Difference<\/th><\/tr>
        AD8227BRZ<\/td>\u00b11.35-18V<\/td>5-1000<\/td>350\u00b5A<\/td>Same family, min gain = 5<\/td><\/tr>
        AD623ARZ<\/td>\u00b11.35-18V<\/td>1-1000<\/td>375\u00b5A<\/td>Predecessor, lower CMRR<\/td><\/tr>
        INA826EA<\/td>2.7-36V<\/td>1-1000<\/td>200\u00b5A<\/td>TI, lower IQ, similar specs<\/td><\/tr>
        INA333AIDR<\/td>1.8-5.5V<\/td>1-1000<\/td>50\u00b5A<\/td>TI, zero-drift, low IQ, low Vin<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6450","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=6450"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6450\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6450"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6450"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6450"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6450"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}