{"id":2985,"date":"2026-05-29T00:35:18","date_gmt":"2026-05-29T00:35:18","guid":{"rendered":"https:\/\/materialparts.com\/opa4322aipwr\/"},"modified":"2026-05-29T00:35:18","modified_gmt":"2026-05-29T00:35:18","slug":"opa4322aipwr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/opa4322aipwr\/","title":{"rendered":"OPA4322AIPWR"},"content":{"rendered":"

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

The OPA4322AIPWR from Texas Instruments is a quad-channel, low-noise, precision CMOS operational amplifier with 20MHz bandwidth and 0.5pA input bias current. Operating from a single 1.8V to 5.5V supply, it features 400\u03bcV offset voltage and 7nV\/\u221aHz noise density. Housed in a 14-pin TSSOP package, it is ideal for low-power, high-impedance sensor applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Category<\/td>\nQuad Operational Amplifier<\/td>\n<\/tr>\n
\u901a\u9053\u6570<\/td>\n4<\/td>\n<\/tr>\n
Bandwidth (GBW)<\/td>\n20 MHz<\/td>\n<\/tr>\n
\u538b\u6446\u7387<\/td>\n10 V\/\u03bcs<\/td>\n<\/tr>\n
\u8f93\u5165\u5931\u8c03\u7535\u538b<\/td>\n400 \u03bcV (typical)<\/td>\n<\/tr>\n
\u8f93\u5165\u504f\u7f6e\u7535\u6d41<\/td>\n0.5 pA<\/td>\n<\/tr>\n
Input Voltage Noise<\/td>\n7 nV\/\u221aHz @ 1kHz<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.8V ~ 5.5V (single supply)<\/td>\n<\/tr>\n
Quiescent Current per Channel<\/td>\n1.4 mA (typical)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\n\u00b150 mA (short circuit)<\/td>\n<\/tr>\n
Rail-to-Rail<\/td>\nInput and Output<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ 125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n14-TSSOP<\/td>\n<\/tr>\n
\u90e8\u4ef6\u72b6\u6001<\/td>\n\u6d3b\u8dc3<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Rail-to-rail input and output for maximum dynamic range<\/li>\n
  • 20MHz GBW with only 1.4mA per channel<\/li>\n
  • Ultra-low input bias current: 0.5pA<\/li>\n
  • Low noise: 7nV\/\u221aHz at 1kHz<\/li>\n
  • Low offset voltage: 400\u03bcV typical<\/li>\n
  • Single supply operation from 1.8V to 5.5V<\/li>\n
  • Phase reversal protection<\/li>\n
  • EMI filtered inputs<\/li>\n
  • High capacitive load drive capability<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • High-impedance sensor interfaces<\/li>\n
    • Photodiode and transimpedance amplifiers<\/li>\n
    • Medical instrumentation<\/li>\n
    • Battery-powered signal conditioning<\/li>\n
    • Portable audio and data acquisition<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The OPA4322AIPWR from Texas Instruments is a quad-channel, low-noise, precision CMOS operational amplifier with 20MHz bandwidth and 0.5pA input bias current. Operating from a single 1.8V to 5.5V supply, it features 400\u03bcV offset voltage and 7nV\/\u221aHz noise density. Housed in a 14-pin TSSOP package, it is ideal for low-power, high-impedance sensor applications. Key […]<\/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-2985","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Quad 20MHz CMOS op-amp, 0.5pA Ibias, 7nV\/\u221aHz, RRO, 1.8-5.5V, 14-TSSOP","date_code":"","package_case":"14-TSSOP (5.0x4.4mm)","in_stock":3472,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/opa322.pdf","price":".80 @ 1ku","product_introduction":"The OPA4322AIPWR from Texas Instruments is a quad-channel, precision CMOS operational amplifier optimized for low-power, high-impedance sensor applications. The device combines 20MHz gain-bandwidth product and 10V\/\u03bcs slew rate with an ultra-low input bias current of 0.5pA, making it ideal for interfacing with high-impedance sensors such as photodiodes, pH probes, and piezoelectric transducers. The rail-to-rail input and output stages maximize dynamic range in single-supply applications from 1.8V to 5.5V. With a low input offset voltage of 400\u03bcV and voltage noise density of 7nV\/\u221aHz, the OPA4322 delivers precision performance for signal conditioning. Each channel consumes only 1.4mA, making the quad package efficient for multi-channel systems.","working_principle":"The OPA4322AIPWR uses a CMOS input stage that provides virtually zero input bias current (0.5pA), eliminating the offset errors caused by bias current flowing through high-impedance source resistors. The rail-to-rail input stage uses complementary PMOS\/NMOS differential pairs that cover the entire supply range. The output stage uses a class-AB push-pull architecture for rail-to-rail output swing with low distortion. Internal EMI filtering on the inputs reduces susceptibility to RF interference. Phase reversal protection circuitry ensures the output does not invert when the input common-mode range is exceeded. The amplifier is internally compensated for unity-gain stability and can drive capacitive loads up to 1nF without oscillation.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>OUT A<\/td>O<\/td>Channel A output<\/td><\/tr>
      2<\/td>-IN A<\/td>I<\/td>Channel A inverting input<\/td><\/tr>
      3<\/td>+IN A<\/td>I<\/td>Channel A non-inverting input<\/td><\/tr>
      4<\/td>V+<\/td>PWR<\/td>Positive supply (1.8V-5.5V)<\/td><\/tr>
      5<\/td>+IN B<\/td>I<\/td>Channel B non-inverting input<\/td><\/tr>
      6<\/td>-IN B<\/td>I<\/td>Channel B inverting input<\/td><\/tr>
      7<\/td>OUT B<\/td>O<\/td>Channel B output<\/td><\/tr>
      8<\/td>OUT C<\/td>O<\/td>Channel C output<\/td><\/tr>
      9<\/td>-IN C<\/td>I<\/td>Channel C inverting input<\/td><\/tr>
      10<\/td>+IN C<\/td>I<\/td>Channel C non-inverting input<\/td><\/tr>
      11<\/td>GND<\/td>GND<\/td>Ground \/ Negative supply<\/td><\/tr>
      12<\/td>+IN D<\/td>I<\/td>Channel D non-inverting input<\/td><\/tr>
      13<\/td>-IN D<\/td>I<\/td>Channel D inverting input<\/td><\/tr>
      14<\/td>OUT D<\/td>O<\/td>Channel D output<\/td><\/tr><\/table>","application_scenarios":"
      • Photodiode TIA<\/b>: Transimpedance amplifier for optical sensors with 0.5pA bias current<\/li>
      • Medical Instrumentation<\/b>: ECG\/EEG front-end amplification with high input impedance<\/li>
      • Multi-Channel DAQ<\/b>: Quad op-amp for simultaneous 4-channel sensor signal conditioning<\/li>
      • Portable Audio<\/b>: Low-voltage audio preamplifier with low noise and RRO<\/li>
      • Chemical Sensors<\/b>: pH and gas sensor interface requiring ultra-low input current<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        OPA322AIPWR<\/td>Texas Instruments<\/td>Single channel, same specs, 8-SOIC<\/td><\/tr>
        OPA2322AIPWR<\/td>Texas Instruments<\/td>Dual channel, same specs, 8-SOIC\/MSOP<\/td><\/tr>
        MCP6004-I\/ST<\/td>Microchip<\/td>1MHz GBW, lower cost, 14-TSSOP<\/td><\/tr>
        TLV9004IPWR<\/td>Texas Instruments<\/td>1MHz, 350\u03bcA\/ch, ultra-low power alternative<\/td><\/tr>
        ADA4522-4ARZ<\/td>Analog Devices<\/td>Zero-drift, 2.1\u03bcV offset, 14-SOIC<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2985","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=2985"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2985\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2985"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}