{"id":5128,"date":"2026-06-09T08:52:59","date_gmt":"2026-06-09T08:52:59","guid":{"rendered":"https:\/\/materialparts.com\/lm1971mx-nopb\/"},"modified":"2026-06-09T08:52:59","modified_gmt":"2026-06-09T08:52:59","slug":"lm1971mx-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/lm1971mx-nopb\/","title":{"rendered":"LM1971MX\/NOPB"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The LM1971MX\/NOPB from Texas Instruments is a digitally-controlled 62 dB audio attenuator with mute function, featuring 0.0008% THD and 115 dB dynamic range for high-fidelity audio volume control.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629<\/td>\n\u062a\u0643\u0633\u0627\u0633 \u0625\u0646\u0633\u062a\u0631\u0648\u0645\u0646\u062a\u0633<\/td>\n<\/tr>\n
\u0627\u0644\u0642\u0646\u0648\u0627\u062a<\/td>\n1<\/td>\n<\/tr>\n
Resolution<\/td>\n8-bit (1 dB steps)<\/td>\n<\/tr>\n
Attenuation Range<\/td>\n0 to -62 dB<\/td>\n<\/tr>\n
Mute Attenuation<\/td>\n102 dB typical<\/td>\n<\/tr>\n
Dynamic Range<\/td>\n115 dB typical<\/td>\n<\/tr>\n
THD<\/td>\n0.0008% typical<\/td>\n<\/tr>\n
Frequency Response<\/td>\n>200 kHz (-3dB)<\/td>\n<\/tr>\n
\u0627\u0644\u0648\u0627\u062c\u0647\u0629<\/td>\n3-wire serial<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n4.5V to 12V<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOIC-8 (3.90mm wide)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +85 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Digital volume control with 1 dB steps<\/li>\n
  • 62 dB attenuation range<\/li>\n
  • Mute function: 102 dB attenuation<\/li>\n
  • Ultra-low THD: 0.0008%<\/li>\n
  • 115 dB dynamic range<\/li>\n
  • Click-free level transitions<\/li>\n
  • 3-wire serial interface (TTL\/CMOS)<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Professional audio mixing consoles<\/li>\n
    • High-end consumer audio<\/li>\n
    • Audio distribution systems<\/li>\n
    • Broadcast equipment<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM1971MX\/NOPB from Texas Instruments is a digitally-controlled 62 dB audio attenuator with mute function, featuring 0.0008% THD and 115 dB dynamic range for high-fidelity audio volume control. Key Specifications Manufacturer Texas Instruments Channels 1 Resolution 8-bit (1 dB steps) Attenuation Range 0 to -62 dB Mute Attenuation 102 dB typical Dynamic Range […]<\/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-5128","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Digital audio attenuator, 62dB range, 1dB steps, 0.0008% THD, SOIC-8","date_code":"","package_case":"SOIC-8 (4.90 x 3.90 mm)","in_stock":12438,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm1971.pdf","price":"$4.20 @ 1ku","product_introduction":"The LM1971MX\/NOPB from Texas Instruments is a CMOS digitally-controlled single-channel audio attenuator providing 62 dB attenuation in 1 dB steps via a 3-wire serial interface. With ultra-low 0.0008% THD, 115 dB dynamic range, and click-free transitions, it delivers audiophile-grade volume control. The mute function provides 102 dB attenuation. Overture series design operates from 4.5V to 12V supply.","working_principle":"The LM1971 uses a resistor ladder network with CMOS switches for precise attenuation in 1 dB steps. The 3-wire serial interface (data, clock, latch) loads the desired attenuation code. Zero-crossing detection synchronizes level changes to minimize audible artifacts. The mute function disconnects the input through a high-impedance path, providing over 100 dB isolation.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Positive supply<\/td><\/tr>
      2<\/td>GND<\/td>Ground<\/td><\/tr>
      3<\/td>DATA<\/td>Serial data input<\/td><\/tr>
      4<\/td>CLOCK<\/td>Serial clock<\/td><\/tr>
      5<\/td>LATCH<\/td>Latch enable<\/td><\/tr>
      6<\/td>MUTE<\/td>Mute control<\/td><\/tr>
      7<\/td>OUT<\/td>Signal output<\/td><\/tr>
      8<\/td>IN<\/td>Signal input<\/td><\/tr><\/table>","application_scenarios":"
      • Professional audio mixing consoles<\/li>
      • High-end consumer preamplifiers<\/li>
      • Audio distribution systems<\/li>
      • Broadcast studio equipment<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Notes<\/th><\/tr>
        TI<\/td>LM1972MX\/NOPB<\/td>Dual-channel version<\/td><\/tr>
        TI<\/td>LM1973MX\/NOPB<\/td>Three-channel version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=5128"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5128\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=5128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=5128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=5128"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=5128"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}