{"id":2436,"date":"2026-05-20T03:57:30","date_gmt":"2026-05-20T03:57:30","guid":{"rendered":"https:\/\/materialparts.com\/lm4040aim3-4-1-nopb\/"},"modified":"2026-05-20T03:57:30","modified_gmt":"2026-05-20T03:57:30","slug":"lm4040aim3-4-1-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm4040aim3-4-1-nopb\/","title":{"rendered":"LM4040AIM3-4.1\/NOPB"},"content":{"rendered":"

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

The LM4040AIM3-4.1\/NOPB from Texas Instruments is a precision micropower shunt voltage reference providing a fixed 4.096V output with +\/-0.1% initial accuracy (A grade). It features 100ppm\/C temperature coefficient, low 35uVrms noise, and requires no external stabilizing capacitor, in a tiny SOT-23-3 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u5fb7\u5dde\u4eea\u5668<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n4.096V (fixed)<\/td>\n<\/tr>\n
Initial Accuracy<\/td>\n+\/-0.1% (A grade)<\/td>\n<\/tr>\n
Temperature Coefficient<\/td>\n100 ppm\/C (max)<\/td>\n<\/tr>\n
Operating Current Range<\/td>\n73uA ~ 15mA<\/td>\n<\/tr>\n
Output Noise<\/td>\n35uVrms (10Hz-10kHz)<\/td>\n<\/tr>\n
Dynamic Impedance<\/td>\n0.3 ohm (typ)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-3 (2.92 x 1.3mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ 85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • +\/-0.1% initial accuracy (A grade at 25C)<\/li>\n
  • 100ppm\/C maximum temperature coefficient<\/li>\n
  • Low output noise: 35uVrms (10Hz-10kHz)<\/li>\n
  • Wide operating current: 73uA to 15mA<\/li>\n
  • No external capacitor required for stability<\/li>\n
  • Tolerates capacitive loads<\/li>\n
  • Ultra-small SOT-23 package<\/li>\n
  • Bandgap reference with curvature correction<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Data acquisition systems and ADC\/DAC references<\/li>\n
    • Portable and battery-powered equipment<\/li>\n
    • Industrial instrumentation and process control<\/li>\n
    • Energy management systems<\/li>\n
    • Power supply monitoring and threshold detection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM4040AIM3-4.1\/NOPB from Texas Instruments is a precision micropower shunt voltage reference providing a fixed 4.096V output with +\/-0.1% initial accuracy (A grade). It features 100ppm\/C temperature coefficient, low 35uVrms noise, and requires no external stabilizing capacitor, in a tiny SOT-23-3 package. Key Specifications Manufacturer Texas Instruments Reference Voltage 4.096V (fixed) Initial Accuracy […]<\/p>\n","protected":false},"author":2,"featured_media":2861,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-2436","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"4.096V precision shunt voltage reference, +\/-0.1% accuracy, 100ppm\/C, 73uA-15mA, SOT-23-3","date_code":"","package_case":"SOT-23-3 (2.92 x 1.3 x 0.93 mm)","in_stock":5430,"datasheet":"https:\/\/www.ti.com\/product\/LM4040-N","price":"$0.86 @ 1ku","product_introduction":"The Texas Instruments LM4040AIM3-4.1\/NOPB is a precision micropower shunt voltage reference that provides a stable 4.096V output with +\/-0.1% initial accuracy. Designed for space-critical applications, it is available in the compact SOT-23-3 surface-mount package. The device uses laser-trimmed resistors and Zener-zap technology during wafer sort to achieve its high accuracy. Bandgap reference temperature drift curvature correction and low dynamic impedance (0.3 ohm typical) ensure stable output voltage over a wide range of operating temperatures and currents. The LM4040 requires no external stabilizing capacitor while maintaining stability with any capacitive load, simplifying PCB design.","working_principle":"The LM4040 operates as a two-terminal shunt (parallel) voltage reference: 1) Bandgap Core: The internal bandgap reference circuit generates a temperature-compensated voltage using curvature correction techniques. The 4.096V output is derived from the bandgap voltage through laser-trimmed resistive dividers, ensuring +\/-0.1% initial accuracy. 2) Shunt Regulation: The device is connected in parallel with the load. A series resistor limits the total current, and the LM4040 shunts excess current to maintain a constant 4.096V across its terminals. Operating current can range from 73uA to 15mA. 3) Stability: The low dynamic impedance of 0.3 ohm at 120Hz ensures the reference voltage remains stable despite variations in load current and supply voltage, without requiring an external bypass capacitor.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>NC<\/td>-<\/td>No connect (leave floating or tie to pin 2)<\/td><\/tr>
      2<\/td>Cathode<\/td>Input\/Output<\/td>Positive terminal; connect to supply through series resistor<\/td><\/tr>
      3<\/td>Anode<\/td>Ground<\/td>Negative terminal; connect to ground<\/td><\/tr><\/table>","application_scenarios":"
      • Precision voltage reference for 12-bit and higher ADC\/DAC systems<\/li>
      • Portable and battery-powered data acquisition equipment<\/li>
      • Industrial process control and instrumentation<\/li>
      • Power supply voltage monitoring and threshold detection circuits<\/li>
      • Energy management and smart metering applications<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM4040CIM3-4.1\/NOPB<\/td>SOT-23-3<\/td>0.5% accuracy, C grade<\/td><\/tr>
        TI<\/td>LM4040AIM3-5.0\/NOPB<\/td>SOT-23-3<\/td>5.0V version, A grade<\/td><\/tr>
        ADI<\/td>ADR3440ARJZ<\/td>SOT-23-3<\/td>4.096V, 0.1%, 8ppm\/C<\/td><\/tr>
        Maxim<\/td>MAX6143ASA41+<\/td>SOT-23-6<\/td>4.096V, 0.05%, 3ppm\/C<\/td><\/tr>
        TI<\/td>REF3040AIDBZR<\/td>SOT-23-3<\/td>4.096V series reference, 50ppm\/C<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2436","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=2436"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2436\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2861"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2436"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}