{"id":3719,"date":"2026-06-08T02:19:44","date_gmt":"2026-06-08T02:19:44","guid":{"rendered":"https:\/\/materialparts.com\/ths4521idgkt\/"},"modified":"2026-06-08T02:19:44","modified_gmt":"2026-06-08T02:19:44","slug":"ths4521idgkt","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ths4521idgkt\/","title":{"rendered":"THS4521IDGKT"},"content":{"rendered":"

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

The THS4521IDGKT from Texas Instruments is a very low-power fully differential amplifier with negative rail input and rail-to-rail output. It features 145MHz bandwidth, 490V\/us slew rate, and 1.14mA per channel supply current in a VSSOP-8 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Architecture<\/td>\nFully Differential Amplifier<\/td>\n<\/tr>\n
Bandwidth<\/td>\n145MHz (AV=1)<\/td>\n<\/tr>\n
\u538b\u6446\u7387<\/td>\n490V\/us (typ)<\/td>\n<\/tr>\n
Voltage Noise<\/td>\n4.6nV\/sqrtHz @ 100kHz<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n2.5V to 5.5V (single or dual)<\/td>\n<\/tr>\n
Supply Current<\/td>\n1.14mA per channel (typ)<\/td>\n<\/tr>\n
HD2 \/ HD3<\/td>\n-133dBc \/ -141dBc @ 10kHz<\/td>\n<\/tr>\n
Open-Loop Gain<\/td>\n119dB (DC)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Fully differential architecture with output common-mode control<\/li>\n
  • 145MHz bandwidth at AV=1 V\/V<\/li>\n
  • Negative rail input (NRI) and rail-to-rail output (RRO)<\/li>\n
  • Ultra-low harmonic distortion: HD2 -133dBc at 10kHz<\/li>\n
  • 490V\/us slew rate for fast settling<\/li>\n
  • Power-down capability: 20uA typical<\/li>\n
  • Accurate output common-mode control for DC-coupled ADC driving<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • ADC drivers (SAR and delta-sigma)<\/li>\n
    • Audio signal conditioning<\/li>\n
    • Single-ended to differential conversion<\/li>\n
    • Low-power data acquisition systems<\/li>\n
    • Medical instrumentation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The THS4521IDGKT from Texas Instruments is a very low-power fully differential amplifier with negative rail input and rail-to-rail output. It features 145MHz bandwidth, 490V\/us slew rate, and 1.14mA per channel supply current in a VSSOP-8 package. Key Specifications Architecture Fully Differential Amplifier Bandwidth 145MHz (AV=1) Slew Rate 490V\/us (typ) Voltage Noise 4.6nV\/sqrtHz @ […]<\/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-3719","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Fully diff amp, 145MHz, 490V\/us SR, NRI\/RRO, 1.14mA\/ch, VSSOP-8","date_code":"","package_case":"VSSOP-8 \/ DGK (3.0 x 4.9 x 0.95 mm)","in_stock":6910,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/ths4521.pdf","price":"$1.88 @ 1ku","product_introduction":"The THS4521IDGKT from Texas Instruments is a very low-power, single-channel fully differential amplifier with negative rail input (NRI) and rail-to-rail output (RRO). Operating from a single 2.5V to 5.5V supply, it consumes only 1.14mA per channel while delivering 145MHz bandwidth at unity gain and 490V\/us slew rate. The device features exceptional harmonic distortion performance (HD2 -133dBc, HD3 -141dBc at 10kHz) and low voltage noise of 4.6nV\/sqrtHz. The input common-mode range extends below the negative rail, enabling easy DC-coupling with single-ended ground-referenced signal sources. Accurate output common-mode control allows direct DC-coupling to ADCs without level shifting. A power-down mode reduces supply current to 20uA typical. The THS4521 is available in an 8-pin VSSOP (DGK) package rated for -40 to 85 C.","working_principle":"The THS4521IDGKT operates as a fully differential amplifier with output common-mode control. Key subsystems include: (1) Differential Input Stage - a pair of matched input transistors with negative rail input capability accepts signals from below the negative supply to 1.2V below the positive supply; (2) Differential Output Stage - a rail-to-rail complementary output stage drives differential signals from nearly rail to rail; (3) Common-Mode Feedback Loop - an internal feedback loop sets the output common-mode voltage; the VOCM pin accepts an external reference voltage or can be left floating for mid-supply default; (4) Power-Down Control - the PD pin disables the amplifier, reducing supply current to 20uA; (5) Feedback Network - external resistors set the differential gain; the device operates as a voltage feedback amplifier with gain-bandwidth product of 95MHz.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VOUT-<\/td>Output<\/td>Negative differential output<\/td><\/tr>
      2<\/td>VOCM<\/td>Input<\/td>Output common-mode voltage set<\/td><\/tr>
      3<\/td>VS+<\/td>Power<\/td>Positive supply voltage<\/td><\/tr>
      4<\/td>VS+<\/td>Power<\/td>Positive supply voltage<\/td><\/tr>
      5<\/td>IN+<\/td>Input<\/td>Non-inverting differential input<\/td><\/tr>
      6<\/td>IN-<\/td>Input<\/td>Inverting differential input<\/td><\/tr>
      7<\/td>PD<\/td>Input<\/td>Power-down control (active high)<\/td><\/tr>
      8<\/td>VOUT+<\/td>Output<\/td>Positive differential output<\/td><\/tr><\/table>","application_scenarios":"
      • SAR ADC driver: DC-coupled single-ended to differential conversion with VOCM control<\/li>
      • Delta-sigma ADC driver: high linearity front-end for precision measurement<\/li>
      • Audio signal conditioning: ultra-low distortion (THD+N -112dBc) for professional audio<\/li>
      • Low-power data acquisition: 1.14mA per channel for battery-powered systems<\/li>
      • Medical instrumentation: high CMRR differential signal conditioning<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>THS4522IDGKT<\/td>VSSOP-8<\/td>Dual version<\/td><\/tr>
        TI<\/td>THS4551IDGKT<\/td>VSSOP-8<\/td>Lower noise, wider supply<\/td><\/tr>
        ADI<\/td>ADA4940-1ACPZ-R7<\/td>LFCSP-16<\/td>Low power FDA<\/td><\/tr>
        TI<\/td>LMH6551MA<\/td>SOIC-8<\/td>Higher speed FDA<\/td><\/tr>
        TI<\/td>THS4531IDGKT<\/td>VSSOP-8<\/td>Ultra-low power (0.25mA)<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3719","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=3719"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3719\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3719"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}