{"id":8549,"date":"2026-06-29T05:13:04","date_gmt":"2026-06-29T05:13:04","guid":{"rendered":"https:\/\/materialparts.com\/lm321sn3t1g\/"},"modified":"2026-06-29T05:13:04","modified_gmt":"2026-06-29T05:13:04","slug":"lm321sn3t1g","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm321sn3t1g\/","title":{"rendered":"LM321SN3T1G"},"content":{"rendered":"

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

The LM321SN3T1G from onsemi is a single-channel, low-power operational amplifier in a tiny SOT-23-5 package. Supporting a wide supply range of 3V to 32V (single supply) or plus\/minus 1.5V to plus\/minus 16V (dual supply), this 1MHz bandwidth amplifier draws only 430uA typical supply current, making it an excellent choice for battery-powered and space-constrained analog signal conditioning.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n1<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n3V ~ 32V (single) or plus\/minus 1.5V ~ plus\/minus 16V<\/td>\n<\/tr>\n
\u589e\u76ca-\u5e26\u5bbd\u4e58\u79ef<\/td>\n1MHz<\/td>\n<\/tr>\n
\u538b\u6446\u7387<\/td>\n0.5V\/us<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\nplus\/minus 7mV (max, 25C)<\/td>\n<\/tr>\n
Supply Current<\/td>\n430uA (typical, 5V)<\/td>\n<\/tr>\n
CMRR<\/td>\n70dB (typical)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C ~ +85C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-5<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Wide single-supply operation from 3V to 32V<\/li>\n
  • Low supply current of 430uA typical<\/li>\n
  • 1MHz gain-bandwidth product for general-purpose use<\/li>\n
  • ESD protection: HBM 2000V, CDM 1000V<\/li>\n
  • Directly replaces LM358\/LM324 single-channel sections in space-constrained designs<\/li>\n
  • Output swings to ground in single-supply applications<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Battery-powered sensor signal conditioning<\/li>\n
    • Active filters and low-frequency amplifiers<\/li>\n
    • Portable medical instrument front-ends<\/li>\n
    • Industrial transducer interface circuits<\/li>\n
    • Single-supply audio pre-amplification<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM321SN3T1G from onsemi is a single-channel, low-power operational amplifier in a tiny SOT-23-5 package. Supporting a wide supply range of 3V to 32V (single supply) or plus\/minus 1.5V to plus\/minus 16V (dual supply), this 1MHz bandwidth amplifier draws only 430uA typical supply current, making it an excellent choice for battery-powered and space-constrained […]<\/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":[144],"class_list":["post-8549","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-on"],"acf":{"brief_explanation":"onsemi single-channel 1MHz op-amp, 3V~32V supply, 430uA Iq, SOT-23-5","date_code":"","package_case":"SOT-23-5 (SN suffix)","in_stock":2409,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/LM321-D.PDF","price":"$0.06 @ 1ku","product_introduction":"The LM321SN3T1G is a general-purpose single-channel operational amplifier manufactured by onsemi in a compact SOT-23-5 surface-mount package. It operates over a wide supply voltage range from 3V to 32V in single-supply configurations or plus\/minus 1.5V to plus\/minus 16V in dual-supply configurations. With a gain-bandwidth product of 1MHz and a typical slew rate of 0.5V\/us, the LM321 is well-suited for low-frequency signal conditioning tasks. The device draws a typical supply current of only 430uA at 5V, making it ideal for battery-powered and portable applications. Its input common-mode range includes ground, and the output can swing to within 1.5V of the positive rail, providing flexibility in single-supply designs.","working_principle":"The LM321SN3T1G uses a classic two-stage CMOS\/bipolar operational amplifier architecture. The input stage consists of a differential pair that amplifies the voltage difference between the inverting and non-inverting inputs. The gain stage provides the majority of the open-loop voltage gain (typically 50V\/mV). The output stage is a class-AB push-pull buffer capable of driving loads to within 1.5V of the supply rails. Frequency compensation is internal, providing stable operation for unity-gain and higher gain configurations. The device maintains a high power supply rejection ratio (PSRR) of 100dB typical, ensuring that power supply noise does not significantly affect the output signal.","pin_description":"\n
      Pin<\/th>Name<\/th>Function<\/th><\/tr>\n
      1<\/td>IN+<\/td>Non-inverting Input<\/td><\/tr>\n
      2<\/td>V-\/GND<\/td>Negative Supply \/ Ground<\/td><\/tr>\n
      3<\/td>IN-<\/td>Inverting Input<\/td><\/tr>\n
      4<\/td>VOUT<\/td>Output<\/td><\/tr>\n
      5<\/td>V+<\/td>Positive Supply<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Sensor signal conditioning: Amplify low-level outputs from temperature, pressure, or light sensors in battery-operated instrumentation<\/li>\n
      • Active filters: Implement low-pass, high-pass, or band-pass filters for audio or instrumentation signal paths<\/li>\n
      • Portable medical devices: Serve as a front-end amplifier for ECG, EMG, or pulse oximetry sensors with low power consumption<\/li>\n
      • Industrial transducer interfaces: Convert 4-20mA current loop signals to voltage for ADC input<\/li>\n
      • Audio pre-amplification: Boost microphone or line-level signals in single-supply consumer audio circuits<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Brand<\/th>GBW<\/th>Iq<\/th>Package<\/th><\/tr>\n
        LMV321SN3T1G<\/td>onsemi<\/td>1MHz<\/td>130uA<\/td>SOT-23-5<\/td><\/tr>\n
        MCP6001T-I\/SN<\/td>Microchip<\/td>1MHz<\/td>100uA<\/td>SOT-23-5<\/td><\/tr>\n
        TLV313SIDBVR<\/td>TI<\/td>1MHz<\/td>150uA<\/td>SOT-23-5<\/td><\/tr>\n
        TS321IDBVR<\/td>ST<\/td>1MHz<\/td>300uA<\/td>SOT-23-5<\/td><\/tr>\n
        NCV321SN3T1G<\/td>onsemi<\/td>1MHz<\/td>430uA<\/td>SOT-23-5<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8549","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=8549"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8549\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8549"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}