{"id":2805,"date":"2026-05-26T01:23:24","date_gmt":"2026-05-26T01:23:24","guid":{"rendered":"https:\/\/materialparts.com\/ina333aidgkr\/"},"modified":"2026-05-26T01:23:24","modified_gmt":"2026-05-26T01:23:24","slug":"ina333aidgkr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ina333aidgkr\/","title":{"rendered":"INA333AIDGKR"},"content":{"rendered":"

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

The INA333AIDGKR from Texas Instruments is a micro-power (50\u03bcA), zero-drift, rail-to-rail output instrumentation amplifier in a VSSOP-8 (DGK) package. With offset voltage of 25\u03bcV max, drift of 0.1\u03bcV\/\u00b0C, and gain set by a single external resistor from 1 to 1000, it is ideal for precision measurement in battery-powered and portable applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n25\u03bcV max (G\u2265100)<\/td>\n<\/tr>\n
Offset Drift<\/td>\n0.1\u03bcV\/\u00b0C (G\u2265100)<\/td>\n<\/tr>\n
Noise Density<\/td>\n50nV\/\u221aHz (G\u2265100)<\/td>\n<\/tr>\n
CMRR<\/td>\n100dB min (G\u226510)<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n200pA max<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.8V to 5.5V<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n50\u03bcA<\/td>\n<\/tr>\n
Bandwidth<\/td>\n150kHz (G=1)<\/td>\n<\/tr>\n
Gain Range<\/td>\n1 to 1000 (external resistor)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nVSSOP-8 (3.0 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
  • Zero-drift: 0.1\u03bcV\/\u00b0C offset drift<\/li>\n
  • Ultralow offset: 25\u03bcV max (G\u2265100)<\/li>\n
  • Low noise: 50nV\/\u221aHz (G\u2265100)<\/li>\n
  • High CMRR: 100dB min (G\u226510)<\/li>\n
  • Low bias current: 200pA max<\/li>\n
  • Rail-to-rail output<\/li>\n
  • Single resistor gain setting: G = 1 + (100k\u03a9\/RG)<\/li>\n
  • RFI filtered inputs<\/li>\n
  • Micro-power: 50\u03bcA quiescent current<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Bridge amplifier circuits<\/li>\n
    • ECG and medical instrumentation<\/li>\n
    • Pressure and load cell sensors<\/li>\n
    • Thermocouple amplifiers<\/li>\n
    • RTD sensor amplifiers<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The INA333AIDGKR from Texas Instruments is a micro-power (50\u03bcA), zero-drift, rail-to-rail output instrumentation amplifier in a VSSOP-8 (DGK) package. With offset voltage of 25\u03bcV max, drift of 0.1\u03bcV\/\u00b0C, and gain set by a single external resistor from 1 to 1000, it is ideal for precision measurement in battery-powered and portable applications. Key Specifications […]<\/p>\n","protected":false},"author":2,"featured_media":2821,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,13],"tags":[],"chip_brand":[138],"class_list":["post-2805","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Zero-drift instrumentation amp, 25\u03bcV Vos, 50\u03bcA Iq, 1.8-5.5V, VSSOP-8","date_code":"","package_case":"VSSOP-8 \/ DGK-8 (3.0 x 4.9 x 1.15mm)","in_stock":10935,"datasheet":"https:\/\/www.ti.com\/product\/INA333","price":"$2.12 @ 1ku","product_introduction":"The INA333AIDGKR from Texas Instruments is a low-power, precision instrumentation amplifier offering excellent accuracy with zero-drift technology. It provides very low offset voltage (25\u03bcV max at G\u2265100), excellent offset voltage drift (0.1\u03bcV\/\u00b0C), and high CMRR (100dB at G\u226510). Operating from 1.8V to 5.5V with only 50\u03bcA quiescent current, it is ideal for battery-operated systems. Gain is set by a single external resistor from 1 to 1000 using the standard equation G = 1 + (100k\u03a9\/RG).","working_principle":"The INA333 uses a three-op-amp instrumentation amplifier topology with auto-calibration (chopper stabilization) to achieve zero-drift performance. The input stage consists of two auto-zeroed amplifiers that continuously correct their own offset, providing ultra-low 25\u03bcV offset and 0.1\u03bcV\/\u00b0C drift. The differential input signal is amplified by the gain stage, with gain determined by a single external resistor RG using G = 1 + (100k\u03a9\/RG). The output stage provides rail-to-rail output swing. RFI filtered inputs prevent high-frequency interference from aliasing into the baseband signal.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>RG<\/td>Passive<\/td>Gain resistor connection<\/td><\/tr>
      2<\/td>VIN-<\/td>Input<\/td>Inverting input<\/td><\/tr>
      3<\/td>VIN+<\/td>Input<\/td>Non-inverting input<\/td><\/tr>
      4<\/td>V-<\/td>Power<\/td>Negative supply<\/td><\/tr>
      5<\/td>REF<\/td>Input<\/td>Reference input (connect to GND)<\/td><\/tr>
      6<\/td>VOUT<\/td>Output<\/td>Amplifier output<\/td><\/tr>
      7<\/td>V+<\/td>Power<\/td>Positive supply<\/td><\/tr>
      8<\/td>RG<\/td>Passive<\/td>Gain resistor connection<\/td><\/tr><\/table>","application_scenarios":"
      • Wheatstone bridge amplifiers for strain gauges and load cells<\/li>
      • ECG and biopotential measurement front-ends<\/li>
      • Precision pressure sensor signal conditioning<\/li>
      • Thermocouple cold-junction compensated amplifiers<\/li>
      • RTD temperature sensor 3-wire\/4-wire interfaces<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>INA333AIDRGR<\/td>WSON-8<\/td>Same die, WSON package<\/td><\/tr>
        TI<\/td>INA3221AIRSVR<\/td>UQFN-16<\/td>3-channel, 1.8V instrumentation amp<\/td><\/tr>
        ADI<\/td>AD8237ARMZ<\/td>MSOP-8<\/td>Zero-drift, rail-to-rail in-amp<\/td><\/tr>
        Maxim<\/td>MAX4238AUT<\/td>SOT-23-6<\/td>Zero-drift op-amp alternative<\/td><\/tr>
        Microchip<\/td>MCP6N11-010E\/SN<\/td>SOIC-8<\/td>Zero-drift instrumentation amp<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2805","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=2805"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2805\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2821"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2805"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}