{"id":3203,"date":"2026-05-31T03:44:40","date_gmt":"2026-05-31T03:44:40","guid":{"rendered":"https:\/\/materialparts.com\/lm321mfx\/"},"modified":"2026-06-06T03:28:43","modified_gmt":"2026-06-06T03:28:43","slug":"lm321mfx","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm321mfx\/","title":{"rendered":"LM321MFX"},"content":{"rendered":"

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

The LM321MFX from Texas Instruments is a low-power single operational amplifier in a 5-pin SOT-23 package supplied on tape and reel (3000 units). It features a 1 MHz gain-bandwidth product, 430 uA supply current, and a wide supply voltage range of 3 V to 32 V. The input common-mode range includes ground for single-supply operation.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u901a\u9053\u6570<\/td>\n1 (Single)<\/td>\n<\/tr>\n
\u589e\u76ca-\u5e26\u5bbd\u4e58\u79ef<\/td>\n1 MHz<\/td>\n<\/tr>\n
\u538b\u6446\u7387<\/td>\n0.4 V\/us<\/td>\n<\/tr>\n
Supply Voltage Range<\/td>\n3 V to 32 V<\/td>\n<\/tr>\n
Supply Current<\/td>\n430 uA typical<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n45 nA typical<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n7 mV max<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to 85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Single version of the industry-standard LM324 quad op-amp<\/li>\n
  • Wide supply voltage range: 3 V to 32 V<\/li>\n

Input common-mode voltage range includes ground<\/td>\n<\/tr>\n
  • Stable with high capacitive loads<\/li>\n
  • Low supply current: 430 uA typical at 5 V<\/li>\n
  • Compact SOT-23-5 surface-mount package<\/li>\n
  • Supplied on large tape and reel (3000 units)<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Battery-powered instruments and portable devices<\/li>\n
    • Chargers and power supply regulation loops<\/li>\n
    • Industrial controls and instrumentation<\/li>\n
    • Desktop and communications infrastructure<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM321MFX from Texas Instruments is a low-power single operational amplifier in a 5-pin SOT-23 package supplied on tape and reel (3000 units). It features a 1 MHz gain-bandwidth product, 430 uA supply current, and a wide supply voltage range of 3 V to 32 V. The input common-mode range includes ground for […]<\/p>\n","protected":false},"author":2,"featured_media":0,"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-3203","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Low-power single op-amp, 1 MHz GBW, 3-32 V, SOT-23-5, tape and reel 3000 pcs","date_code":"","package_case":"SOT-23-5 (2.90 x 1.60 x 1.45 mm)","in_stock":7200,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm321.pdf","price":"$0.15 @ 1ku","product_introduction":"The LM321MFX is a low-power single operational amplifier from Texas Instruments, supplied on a large tape and reel of 3000 units for high-volume automated assembly. As the single-channel version of the ubiquitous LM324, it provides a 1 MHz gain-bandwidth product with only 430 uA typical supply current in a 5-pin SOT-23 package. The wide supply voltage range of 3 V to 32 V accommodates both single-supply and dual-supply applications. The input common-mode range includes ground, enabling true single-supply operation without a negative rail. The device remains stable with high capacitive loads, a feature that simplifies design when driving cables, filter networks, or other capacitive loads. The MFX suffix denotes the tape-and-reel packaging variant with 3000 units per reel, suitable for pick-and-place assembly in volume production.","working_principle":"The LM321MFX operates as a voltage-feedback operational amplifier with internal compensation: (1) The differential input stage amplifies the voltage difference between the non-inverting and inverting inputs using bipolar transistors. The input bias current of 45 nA and input common-mode range that includes ground support single-supply operation. (2) The gain stage provides voltage amplification with internal frequency compensation for unity-gain stability. The 1 MHz gain-bandwidth product and 0.4 V\/us slew rate are optimized for low-to-moderate frequency signal processing. (3) The Class AB output stage drives resistive and capacitive loads without oscillation. The output can swing close to ground in single-supply configurations, and the low 430 uA quiescent current makes the device ideal for battery-powered applications.","pin_description":"
      Pin No.<\/td>Pin Name<\/td>Function<\/td><\/tr>
      1<\/td>OUT<\/td>Amplifier output<\/td><\/tr>
      2<\/td>V-<\/td>Negative supply \/ ground<\/td><\/tr>
      3<\/td>IN+<\/td>Non-inverting input<\/td><\/tr>
      4<\/td>IN-<\/td>Inverting input<\/td><\/tr>
      5<\/td>V+<\/td>Positive supply (3 V to 32 V)<\/td><\/tr><\/table>","application_scenarios":"
      • High-volume consumer electronics production requiring a cost-effective single op-amp in tape-and-reel format for automated assembly<\/li>
      • Single-supply sensor signal conditioning with ground-referenced inputs in portable instrumentation<\/li>
      • Power supply feedback loops and charger control circuits where the wide 3-32 V range provides design flexibility<\/li>
      • Industrial control circuits driving capacitive loads such as cable outputs or passive filter networks<\/li><\/ul>","alternative_models":"
        Model<\/td>Brand<\/td>GBW<\/td>Supply Range<\/td>Package<\/td><\/tr>
        LM321MF\/NOPB<\/td>TI<\/td>1 MHz<\/td>3-32 V<\/td>SOT-23-5 (1ku T&R)<\/td><\/tr>
        LM321MFX\/NOPB<\/td>TI<\/td>1 MHz<\/td>3-32 V<\/td>SOT-23-5 (3ku T&R)<\/td><\/tr>
        MCP6001T-I\/SN<\/td>Microchip<\/td>1 MHz<\/td>1.8-6 V<\/td>SOT-23-5<\/td><\/tr>
        LMV321IDBVR<\/td>TI<\/td>1 MHz<\/td>2.7-5.5 V<\/td>SOT-23-5<\/td><\/tr>
        TSU104IYLT<\/td>ST<\/td>0.9 MHz<\/td>1.8-5.5 V<\/td>SOT-23-5<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3203","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=3203"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3203\/revisions"}],"predecessor-version":[{"id":3284,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3203\/revisions\/3284"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3203"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3203"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3203"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}