{"id":2958,"date":"2026-05-28T15:23:51","date_gmt":"2026-05-28T15:23:51","guid":{"rendered":"https:\/\/materialparts.com\/ad7891as1\/"},"modified":"2026-05-28T15:23:51","modified_gmt":"2026-05-28T15:23:51","slug":"ad7891as1","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ad7891as1\/","title":{"rendered":"AD7891AS1"},"content":{"rendered":"

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

The AD7891AS-1 from Analog Devices is an LC\u00b2MOS 8-Channel, 12-Bit High Speed Data Acquisition System in a 44-lead MQFP package. It integrates an input multiplexer, on-chip track\/hold amplifier, a fast 12-bit ADC, a 2.5 V reference, and parallel\/serial interface on a single chip operating from a 5 V supply.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Resolution<\/td>\n12 Bit<\/td>\n<\/tr>\n
\u6e20\u9053<\/td>\n8 Single-Ended<\/td>\n<\/tr>\n
Conversion Time<\/td>\n1.6 \u03bcs<\/td>\n<\/tr>\n
Throughput Rate<\/td>\n454.5 kSPS (AD7891-1)<\/td>\n<\/tr>\n
Analog Input Range<\/td>\n\u00b15 V, \u00b110 V<\/td>\n<\/tr>\n
SNR<\/td>\n70 dB min<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n5 V single<\/td>\n<\/tr>\n
\u529f\u7387\u8017\u6563<\/td>\n82 mW typ<\/td>\n<\/tr>\n
Interface<\/td>\nParallel \/ Serial (pin-selectable)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n44-Lead MQFP<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Fast 12-bit ADC with 1.6 \u03bcs conversion time<\/li>\n
  • 8 single-ended analog input channels with overvoltage protection<\/li>\n
  • On-chip track\/hold amplifier and 2.5 V reference<\/li>\n
  • Parallel and serial interface (MODE pin selectable)<\/li>\n
  • Single 5 V supply, low power operation (100 mW max)<\/li>\n
  • Power-down mode (75 \u03bcW typ)<\/li>\n
  • \u00b15 V and \u00b110 V bipolar input ranges<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Data acquisition systems<\/li>\n
    • Motor control<\/li>\n
    • Mobile communication base stations<\/li>\n
    • Industrial instrumentation<\/li>\n
    • Process monitoring<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AD7891AS-1 from Analog Devices is an LC\u00b2MOS 8-Channel, 12-Bit High Speed Data Acquisition System in a 44-lead MQFP package. It integrates an input multiplexer, on-chip track\/hold amplifier, a fast 12-bit ADC, a 2.5 V reference, and parallel\/serial interface on a single chip operating from a 5 V supply. Key Specifications Resolution 12 […]<\/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":[165],"class_list":["post-2958","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-adi"],"acf":{"brief_explanation":"8-ch 12-bit 454kSPS ADC DAS, bipolar inputs, parallel\/serial, 44-MQFP, 5V supply","date_code":"","package_case":"MQFP-44 (10 x 10 mm)","in_stock":9131,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/ad7891.pdf","price":"","product_introduction":"The AD7891AS-1 is an 8-channel, 12-bit high speed data acquisition system manufactured by Analog Devices. It contains an input multiplexer, on-chip track\/hold amplifier, high-speed 12-bit ADC, 2.5 V reference, and high-speed interface. The device operates from a single 5 V supply and accepts bipolar analog input ranges of plus\/minus 5 V and plus\/minus 10 V (AD7891-1 variant). The parallel or serial interface structure is determined by the MODE pin, providing easy interfacing to modern microprocessors, microcontrollers, and digital signal processors.","working_principle":"The AD7891AS-1 operates as a complete data acquisition system. The analog input is selected by the multiplexer from 8 single-ended channels, each with overvoltage protection. The selected signal passes through the on-chip track\/hold amplifier, which acquires the input during the tracking phase. Upon CONVST assertion, the track\/hold enters hold mode and the 12-bit successive approximation ADC performs the conversion in 1.6 microseconds. The result is available through either the parallel or serial interface as selected by the MODE pin. An internal 2.5 V reference is provided for ratiometric conversion.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1-6<\/td>VIN1A-VIN3B<\/td>Input<\/td>Analog input channels 1-3<\/td><\/tr>
      7-18<\/td>VIN4A-VIN8B<\/td>Input<\/td>Analog input channels 4-8<\/td><\/tr>
      20-21<\/td>REF IN\/OUT<\/td>I\/O<\/td>Reference input\/output<\/td><\/tr>
      29<\/td>VDD<\/td>Power<\/td>+5 V supply<\/td><\/tr>
      30<\/td>AGND<\/td>Ground<\/td>Analog ground<\/td><\/tr>
      34<\/td>EOC<\/td>Output<\/td>End of conversion signal<\/td><\/tr>
      36<\/td>CONVST<\/td>Input<\/td>Conversion start signal<\/td><\/tr>
      40<\/td>CS<\/td>Input<\/td>Chip select (active low)<\/td><\/tr>
      42<\/td>MODE<\/td>Input<\/td>Interface mode select (parallel\/serial)<\/td><\/tr>
      43-50<\/td>DB11-DATA IN<\/td>I\/O<\/td>Data bus \/ serial data<\/td><\/tr><\/table>","application_scenarios":"
      • Multichannel data acquisition systems<\/li>
      • Motor control and drive feedback<\/li>
      • Mobile communication base station monitoring<\/li>
      • Industrial instrumentation and measurement<\/li>
      • Automated test equipment<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Analog Devices<\/td>AD7891AS-2<\/td>MQFP-44<\/td>Unipolar input ranges variant<\/td><\/tr>
        Analog Devices<\/td>AD7891ASZ-1<\/td>MQFP-44<\/td>Pb-free version<\/td><\/tr>
        Analog Devices<\/td>AD7890<\/td>TSSOP-28<\/td>8-ch 12-bit with serial interface<\/td><\/tr>
        Maxim Integrated<\/td>MAX1300<\/td>TQFP-48<\/td>8-ch 12-bit 500kSPS ADC<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2958","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=2958"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2958\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2958"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}