{"id":7833,"date":"2026-06-28T02:42:01","date_gmt":"2026-06-28T02:42:01","guid":{"rendered":"https:\/\/materialparts.com\/ina219bidcn\/"},"modified":"2026-06-28T10:20:30","modified_gmt":"2026-06-28T10:20:30","slug":"ina219bidcn","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ina219bidcn\/","title":{"rendered":"INA219BIDCN"},"content":{"rendered":"

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

The INA219BIDCN is a bidirectional current\/power monitor with I2C interface from Texas Instruments featuring 0.1% gain error, 16 programmable addresses, and 12-bit ADC in a tiny SOT-23-8 package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7535\u6e90\u7535\u538b<\/td>\n3V to 5.5V<\/td>\n<\/tr>\n
Common-Mode Voltage<\/td>\n0V to 26V<\/td>\n<\/tr>\n
Gain Error<\/td>\n0.1% (max)<\/td>\n<\/tr>\n
Offset Voltage<\/td>\n100 \u00b5V (max)<\/td>\n<\/tr>\n
ADC Resolution<\/td>\n12-bit<\/td>\n<\/tr>\n
Interface<\/td>\nI2C (up to 1MHz fast mode plus)<\/td>\n<\/tr>\n
I2C Addresses<\/td>\n16 programmable via A0\/A1 pins<\/td>\n<\/tr>\n
Shunt Voltage Range<\/td>\n\u00b1320mV (PGA gain = \/1)<\/td>\n<\/tr>\n
Operating Current<\/td>\n1mA maximum<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-8<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • High-precision 0.1% gain error over temperature<\/li>\n
  • Wide common-mode voltage range: 0V to 26V<\/li>\n
  • 16 programmable I2C addresses for multi-sensor systems<\/li>\n
  • Bidirectional current measurement capability<\/li>\n
  • 12-bit ADC with programmable resolution and conversion time<\/li>\n
  • Internal multiplier for direct power calculation<\/li>\n
  • Alert pin with programmable over-limit threshold<\/li>\n
  • Low quiescent current: 1mA max<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Battery chargers and fuel gauges<\/li>\n
    • Power supply monitoring<\/li>\n
    • Server and telecom power management<\/li>\n
    • Motor control current sensing<\/li>\n
    • Solar and renewable energy systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The INA219BIDCN is a bidirectional current\/power monitor with I2C interface from Texas Instruments featuring 0.1% gain error, 16 programmable addresses, and 12-bit ADC in a tiny SOT-23-8 package. Key Specifications Supply Voltage 3V to 5.5V Common-Mode Voltage 0V to 26V Gain Error 0.1% (max) Offset Voltage 100 \u00b5V (max) ADC Resolution 12-bit Interface […]<\/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-7833","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Bidirectional current\/power monitor, I2C, 0-26V CMV, 0.1% gain error, SOT-23-8","date_code":"","package_case":"SOT-23-8 (2.9 x 2.8 x 1.45mm)","in_stock":8920,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/ina219.pdf","price":"$2.19 @ 1ku","product_introduction":"The INA219BIDCN is a high-side bidirectional current shunt and power monitor from Texas Instruments with an I2C interface. It features 0.1% gain error accuracy, a wide 0V to 26V common-mode voltage range, and a 12-bit ADC with programmable resolution (9 to 12 bits). The device measures shunt voltage, bus voltage, and internally calculates power, providing all data via the I2C interface. The 16 programmable I2C addresses allow up to 16 devices on a single bus. An alert pin with programmable threshold provides hardware interrupt capability for over-current or over-power conditions. The B-grade version offers improved 0.1% gain error specification over the A-grade.","working_principle":"The INA219BIDCN operates as a delta-sigma ADC-based current and power monitor. The shunt voltage across the external sense resistor is amplified by the programmable gain amplifier (PGA) with gains of \/1, \/2, \/4, or \/8, providing full-scale ranges of \u00b1320mV, \u00b1160mV, \u00b180mV, or \u00b140mV respectively. The ADC converts the amplified shunt voltage and the bus voltage using a delta-sigma architecture with programmable resolution and conversion time (9 to 12 bits, 84\u00b5s to 68.1ms). An internal multiplier circuit automatically computes the power value by multiplying the shunt current (derived from shunt voltage and programmed calibration value) by the bus voltage. The calibration register allows the user to set the current LSB to any desired value, enabling direct readout in amperes and watts. The I2C interface provides access to all measurement registers, configuration, and alert threshold settings. The alert comparator monitors selected parameters and asserts the ALERT pin when thresholds are exceeded.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>IN+<\/td>Analog Input<\/td>Positive shunt voltage input (connect to load side)<\/td><\/tr>\n
      2<\/td>IN-<\/td>Analog Input<\/td>Negative shunt voltage input (connect to supply side)<\/td><\/tr>\n
      3<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>\n
      4<\/td>SDA<\/td>I\/O<\/td>I2C data (open drain)<\/td><\/tr>\n
      5<\/td>SCL<\/td>Input<\/td>I2C clock<\/td><\/tr>\n
      6<\/td>A0<\/td>Input<\/td>I2C address select bit 0 (connect to GND, VS, SDA, or SCL)<\/td><\/tr>\n
      7<\/td>A1<\/td>Input<\/td>I2C address select bit 1 (connect to GND, VS, SDA, or SCL)<\/td><\/tr>\n
      8<\/td>VS<\/td>Power<\/td>Supply voltage (3V-5.5V)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Battery Management:<\/strong> Bidirectional current measurement with 0.1% accuracy tracks charge and discharge cycles in battery packs<\/li>\n
      • Server Power Monitoring:<\/strong> 0-26V CMV range covers 12V and 5V rails; 16 addresses enable multi-rail monitoring<\/li>\n
      • Solar Energy:<\/strong> Power calculation eliminates need for external MCU multiplication; alert pin flags over-current<\/li>\n
      • Motor Control:<\/strong> Bidirectional capability measures both drive and regenerative currents in H-bridge motor drivers<\/li>\n
      • Test Equipment:<\/strong> Programmable gain and calibration enable flexible current ranges from milliamps to amps<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Specs<\/th><\/tr>\n
        INA219AIDCN<\/td>TI<\/td>A-grade, 1% gain error, lower cost<\/td>-<\/td>-<\/td><\/tr>\n
        INA226<\/td>TI<\/td>Higher precision (0.1%), 16-bit, alert pin, MSOP-10<\/td>-<\/td>-<\/td><\/tr>\n
        INA260<\/td>TI<\/td>Integrated 2m\u03a9 shunt, no external resistor needed<\/td>-<\/td>-<\/td><\/tr>\n
        MAX34417<\/td>ADI\/Maxim<\/td>Quad channel, 12-bit, I2C<\/td>-<\/td>-<\/td><\/tr>\n
        PAC1710-1-AIA<\/td>Microchip<\/td>Single-supply, 0-40V, I2C<\/td>-<\/td>-<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7833","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=7833"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7833\/revisions"}],"predecessor-version":[{"id":8302,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/7833\/revisions\/8302"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=7833"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=7833"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=7833"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=7833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}