{"id":7155,"date":"2026-06-23T05:47:31","date_gmt":"2026-06-23T05:47:31","guid":{"rendered":"https:\/\/materialparts.com\/lf444cmx-nopb\/"},"modified":"2026-06-23T05:47:31","modified_gmt":"2026-06-23T05:47:31","slug":"lf444cmx-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lf444cmx-nopb\/","title":{"rendered":"LF444CMX\/NOPB"},"content":{"rendered":"

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

The LF444CMX\/NOPB from Texas Instruments is a quad low-power JFET-input operational amplifier in a SOIC-14 package. With 100pA input bias current and 1MHz GBW, it provides high-impedance input interfacing for sensor and photodiode applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n4 (quad)<\/td>\n<\/tr>\n
Gain-Bandwidth<\/td>\n1 MHz<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n100 pA (typical)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n+\/-5 V to +\/-18 V<\/td>\n<\/tr>\n
\u538b\u6446\u7387<\/td>\n1 V\/us<\/td>\n<\/tr>\n
Supply Current<\/td>\n0.4 mA per amplifier<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +85C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 100pA ultra-low input bias current for high-impedance sensors<\/li>\n
  • JFET input stage for low-noise precision applications<\/li>\n
  • 0.4mA per-amplifier supply current (1\/10 of TL074)<\/li>\n
  • Pin-compatible with TL074 and LM348<\/li>\n
  • 1MHz GBW for general-purpose signal conditioning<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Photodiode and photovoltaic transimpedance amplifiers<\/li>\n
    • pH electrode and high-impedance sensor interfaces<\/li>\n
    • Low-power battery-operated instrumentation<\/li>\n
    • Active filters for low-frequency signals<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LF444CMX\/NOPB from Texas Instruments is a quad low-power JFET-input operational amplifier in a SOIC-14 package. With 100pA input bias current and 1MHz GBW, it provides high-impedance input interfacing for sensor and photodiode applications. Key Specifications Channels 4 (quad) Gain-Bandwidth 1 MHz Input Bias Current 100 pA (typical) Supply Voltage +\/-5 V to […]<\/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":[138],"class_list":["post-7155","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Quad JFET op-amp, 100pA Ibias, 1MHz GBW, 0.4mA\/ch, SOIC-14, low power","date_code":"","package_case":"SOIC-14 (8.75 x 3.90 x 1.50 mm)","in_stock":9971,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lf444.pdf","price":"$0.75 @ 1ku","product_introduction":"The LF444CMX\/NOPB from Texas Instruments is a quad low-power JFET-input operational amplifier in a SOIC-14 package. The JFET input stage provides 100pA typical input bias current, making the device ideal for interfacing with high-impedance sensors such as photodiodes, pH electrodes, and piezoelectric transducers. The 1MHz gain-bandwidth product and 1V\/us slew rate support general-purpose signal conditioning. Supply current is only 0.4mA per amplifier, approximately one-tenth of the popular TL074, making the LF444 suitable for battery-operated instruments. The device operates from +\/-5V to +\/-18V dual supplies and is pin-compatible with the TL074 and LM348, allowing direct substitution in low-power applications. Offset voltage is typically 3mV with 10uV\/C drift.","working_principle":"The LF444CMX\/NOPB uses a JFET input stage with bipolar output for low-power precision amplification. (1) JFET Input: A matched JFET differential pair provides the 100pA input bias current and high input impedance (10^12 Ohms typical). The JFETs operate in the constant-current region, providing low noise (15nV\/sqrtHz) and low input bias current independent of common-mode voltage. (2) Gain Stage: A common-emitter gain stage provides approximately 100dB open-loop gain. Internal compensation (30pF capacitor) ensures stability at unity gain with capacitive loads up to approximately 100pF. (3) Output Stage: A class-AB bipolar output stage swings to within approximately 1.5V of the supply rails and can source\/sink approximately 10mA. (4) Low Power: The bias network is designed for 0.4mA per-amplifier supply current, compared to 1.4mA for the TL074. The reduced bias current trades bandwidth for power savings, making the device ideal for battery-powered applications.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>1OUT<\/td>Output<\/td>Channel A output<\/td><\/tr>
      2<\/td>1IN-<\/td>Input<\/td>Channel A inverting input<\/td><\/tr>
      3<\/td>1IN+<\/td>Input<\/td>Channel A non-inverting input<\/td><\/tr>
      4<\/td>V+<\/td>Power<\/td>Positive supply<\/td><\/tr>
      5<\/td>2IN+<\/td>Input<\/td>Channel B non-inverting input<\/td><\/tr>
      6<\/td>2IN-<\/td>Input<\/td>Channel B inverting input<\/td><\/tr>
      7<\/td>2OUT<\/td>Output<\/td>Channel B output<\/td><\/tr>
      8<\/td>3OUT<\/td>Output<\/td>Channel C output<\/td><\/tr>
      9<\/td>3IN-<\/td>Input<\/td>Channel C inverting input<\/td><\/tr>
      10<\/td>3IN+<\/td>Input<\/td>Channel C non-inverting input<\/td><\/tr>
      11<\/td>V-<\/td>Power<\/td>Negative supply<\/td><\/tr>
      12<\/td>4IN+<\/td>Input<\/td>Channel D non-inverting input<\/td><\/tr>
      13<\/td>4IN-<\/td>Input<\/td>Channel D inverting input<\/td><\/tr>
      14<\/td>4OUT<\/td>Output<\/td>Channel D output<\/td><\/tr><\/table>","application_scenarios":"
      • Photodiode and photovoltaic transimpedance amplifiers with 100pA bias<\/li>
      • pH electrode and high-impedance sensor interfaces at 0.4mA per channel<\/li>
      • Low-power battery-operated instrumentation with 1MHz GBW<\/li>
      • Active filters for low-frequency signals in portable equipment<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>TL074CDR<\/td>SOIC-14<\/td>Higher speed (3MHz), higher Iq<\/td><\/tr>
        TI<\/td>LF347DR<\/td>SOIC-14<\/td>Similar JFET, higher Iq<\/td><\/tr>
        ADI<\/td>ADA4075-4ARUZ<\/td>TSSOP-14<\/td>Precision quad JFET<\/td><\/tr>
        Microchip<\/td>MCP6H04-E\/SN<\/td>SOIC-14<\/td>RRIO, low power CMOS<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7155","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=7155"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7155\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7155"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}