\n| \u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n | -40 to +125 C<\/td>\n<\/tr>\n<\/table>\n\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n\n- Measures current, voltage, and power<\/li>\n
- Programmable PGA with 4 gain settings<\/li>\n
- 16 programmable I2C addresses<\/li>\n
- Calibration register for direct ampere readout<\/li>\n
- Programmable conversion time and filtering<\/li>\n<\/ul>\n
\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n\n- Server and telecom power monitoring<\/li>\n
- Battery charger current measurement<\/li>\n
- Notebook computer power management<\/li>\n
- Industrial power supply monitoring<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"
Product Overview The INA219AIDCNR from Texas Instruments is a 26V 12-bit I2C current\/power monitor with programmable PGA and calibration in SOT-23-8. Key Specifications Common-Mode Range 0V to 26V Resolution 12-bit ADC Shunt Voltage Range +\/-320mV (PGA \/8) PGA Gains \/1, \/2, \/4, \/8 Accuracy (A grade) 1% max over temp I2C Addresses 16 programmable Supply […]<\/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-7643","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"26V current\/power monitor, I2C, 12-bit, SOT-23-8","date_code":"","package_case":"SOT-23-8 DCN (2.90 x 1.63 mm)","in_stock":35000,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/ina219.pdf","price":"$0.76 @ 1ku","product_introduction":"The INA219AIDCNR from Texas Instruments is a zero-drift bidirectional current\/power monitor with I2C interface in SOT-23-8. It measures both shunt voltage drop and bus supply voltage (0-26V), with a 12-bit ADC and programmable PGA providing +\/-320mV full-scale shunt range. The calibration register combined with an internal multiplier enables direct readout of current in amperes, and a power register provides wattage. The A grade offers 1% accuracy over temperature. 16 programmable I2C addresses allow multiple devices on the same bus.","working_principle":"The INA219AIDCNR operates as a digital current and power monitor. (1) The differential input measures the voltage across an external shunt resistor with 12-bit resolution (10uV LSB). The programmable PGA provides \/1, \/2, \/4, \/8 gain settings, enabling shunt ranges from +\/-40mV to +\/-320mV. The bus voltage input measures the common-mode voltage (0-26V) with 4mV LSB. (2) The calibration register sets the current LSB based on the shunt resistance and desired measurement range. The internal multiplier computes current = shunt_voltage x calibration_value, and power = current x bus_voltage. This eliminates the need for the host MCU to perform floating-point calculations. (3) The I2C\/SMBus interface provides access to six registers: Configuration, Shunt Voltage, Bus Voltage, Power, Current, and Calibration. Programmable conversion times (84us to 586us) and averaging (1 to 128 samples) allow trading speed for noise reduction. The 16 address options are set by A0 and A1 pins tied to GND, VS, SDA, or SCL.","pin_description":" | Pin<\/th> | Name<\/th> | Description<\/th><\/tr> |
|---|
| 1<\/td> | IN+<\/td> | Shunt voltage positive input; connect to load-side of shunt resistor<\/td><\/tr> | | 2<\/td> | IN-<\/td> | Shunt voltage negative input; connect to ground-side of shunt resistor<\/td><\/tr> | | 3<\/td> | GND<\/td> | Ground reference<\/td><\/tr> | | 4<\/td> | SDA<\/td> | I2C serial data; open-drain bidirectional, requires external pull-up<\/td><\/tr> | | 5<\/td> | SCL<\/td> | I2C serial clock; open-drain input, requires external pull-up; supports 3.4 MHz High-Speed mode<\/td><\/tr> | | 6<\/td> | A0<\/td> | I2C address select bit 0; connect to GND, VCC, SDA, or SCL for 16 address combinations<\/td><\/tr> | | 7<\/td> | A1<\/td> | I2C address select bit 1; connect to GND, VCC, SDA, or SCL for 16 address combinations<\/td><\/tr> | | 8<\/td> | VCC<\/td> | Power supply (3.0 V to 5.5 V); connect 0.1 uF decoupling capacitor<\/td><\/tr><\/table> Package: MSOP-8 (DCN). Common-mode voltage range: 0 V to 26 V independent of VCC. ADC resolution: 12-bit for current, 12-bit for shunt voltage. Programmable PGA: +\/-40 mV to +\/-320 mV full-scale. 16 programmable I2C addresses.<\/p>","application_scenarios":" - Server Power Monitoring:<\/strong> Real-time current and power measurement on server 12 V and 3.3 V rails with direct digital ampere and watt readout via I2C to BMC<\/li>
- Battery Charger Management:<\/strong> Measuring charge\/discharge current through a shunt with 0 V to 26 V common-mode range covering full battery voltage span<\/li>
- Notebook Computer Power:<\/strong> Monitoring CPU\/GPU rail current and voltage with 16 I2C addresses allowing multiple INA219 on same bus for multi-rail power budgeting<\/li>
- Solar Panel Monitoring:<\/strong> Tracking panel output current and bus voltage with high-side shunt measurement up to 26 V for maximum power point tracking<\/li>
- Industrial Power Supply Metering:<\/strong> Programmable PGA and calibration registers enable accurate current measurement across multiple supply rails with a single IC design<\/li><\/ul>","alternative_models":"
\n| Model<\/th> | Manufacturer<\/th> | Key Difference<\/th> | Package<\/th> | Resolution<\/th><\/tr>\n |
|---|
| INA219BIDCNR<\/td> | TI<\/td> | B-grade version with 0.5% current sensing accuracy vs 1% for A-grade, same functionality<\/td> | MSOP-8<\/td> | 12-bit<\/td><\/tr>\n | | INA226AIDGKR<\/td> | TI<\/td> | 16-bit resolution with programmable alert\/comparator output and 0.1% accuracy<\/td> | VSSOP-10<\/td> | 16-bit<\/td><\/tr>\n | | PAC1710-1-AIA-TR<\/td> | Microchip<\/td> | Single-supply 0-40V power monitor with 11-bit ADC and one-shot measurement mode<\/td> | MSOP-8<\/td> | 11-bit<\/td><\/tr>\n | | MAX34407ETAT<\/td> | ADI<\/td> | Quad power accumulator with I2C, 12-bit ADC, and continuous power calculation<\/td> | TQFN-16<\/td> | 12-bit quad<\/td><\/tr>\n | | INA260AIPWR<\/td> | TI<\/td> | Integrated 2mOhm shunt with 0.1% accuracy and 15-bit current\/voltage ADC<\/td> | TSSOP-16<\/td> | 15-bit<\/td><\/tr>\n<\/table>\n The INA219AIDCNR is a 12-bit bidirectional current\/power monitor with 0-26V common-mode range and I2C interface. It measures shunt voltage, bus voltage, current, and power. For higher accuracy, the INA226 offers 16-bit resolution and 0.1% accuracy with an alert pin for threshold monitoring.<\/p>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/7643","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/comments?post=7643"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/7643\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/media?parent=7643"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/categories?post=7643"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/tags?post=7643"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=7643"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} |
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