{"product_id":"ina139na-3k-high-side-current-shunt-monitor-c129947-sot-23-5","title":"INA139NA\/3K High-Side Current Shunt Monitor (C129947, SOT-23-5)","description":"\u003cp\u003eKeep a precise eye on your system's power consumption with the \u003cb\u003eINA139NA\/3K\u003c\/b\u003e high-side current shunt monitor. Designed to measure the voltage drop across a shunt resistor, this IC is an absolute must-have for designing custom Power Distribution Boards (PDBs), Battery Management Systems (BMS), or smart chargers for your FPV drones and robotics projects.\u003c\/p\u003e\n\u003cp\u003eWhat makes the INA139 stand out is its wide input common-mode voltage range of 2.7V to 40V, which allows it to monitor high-voltage LiPo battery packs (up to 8S+) entirely independently of its own supply voltage. It converts the differential input voltage into a proportional current output, making it extremely easy to interface with any microcontroller's ADC using a single external load resistor. Housed in a tiny SOT-23-5 footprint, it provides robust, industrial-grade current sensing without taking up valuable PCB space.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHigh-Side Measurement:\u003c\/b\u003e Safely monitors current on the positive supply line, keeping the system ground path completely undisturbed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eWide Voltage Range:\u003c\/b\u003e The input common-mode voltage extends from 2.7V up to 40V, perfect for multi-cell LiPo battery setups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eIndependent Supply:\u003c\/b\u003e The measurement inputs can handle voltages far exceeding the chip's own VCC supply, providing excellent flexibility and safety.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eEasily Scalable:\u003c\/b\u003e The output is a current proportional to the measured voltage drop, allowing you to set the custom voltage gain with just one external resistor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePart Number:\u003c\/b\u003e INA139NA\/3K (LCSC: C129947)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eIC Type:\u003c\/b\u003e High-Side Current Shunt Monitor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCommon-Mode Input Voltage:\u003c\/b\u003e 2.7V to 40V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSupply Voltage:\u003c\/b\u003e 2.7V to 40V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eQuiescent Current:\u003c\/b\u003e 60 µA (Typical)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePackage Type:\u003c\/b\u003e SOT-23-5 (SMD\/SMT)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RC-LIFE","offers":[{"title":"Default Title","offer_id":54258383487314,"sku":null,"price":5.0,"currency_code":"PLN","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1065\/8067\/2850\/files\/150_C04-091_CT_OT_5_web_640x640_b6962e89-2280-4450-bf79-b44a11e626d3.webp?v=1786695246","url":"https:\/\/rc-life.com\/products\/ina139na-3k-high-side-current-shunt-monitor-c129947-sot-23-5","provider":"rc-life","version":"1.0","type":"link"}