{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"INA191A3IYFDR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"INA191A3IYFDR","canonicalUrl":"https://icboms.com/texas-instruments/INA191A3IYFDR","factsUrl":"https://icboms.com/api/mcp/products/INA191A3IYFDR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Zero-Drift Current Sense Amplifier, INA191A3IYFDR, 1 Circuit, 37 kHz GBW, 0.3 V/µs Slew Rate, Rail-to-Rail Output, 6-DSBGA Package.","salesMarkdown":"## Current-Sense Parametrics for the Shunt Drop Decision The INA191A3IYFDR is a Zero-Drift current-sense amplifier from Texas Instruments, designed to measure the voltage drop across a shunt resistor in the supply or return path. Its 2.5 µV input offset voltage and 100 pA input bias current let the designer choose a lower-value shunt for reduced power dissipation — the offset error at 10 mV full-scale drop is under 0.025 %, and the bias current drawn from the shunt leg is negligible even with a 1 kΩ series resistance. The 37 kHz gain-bandwidth product and 0.3 V/µs slew rate set the usable sense bandwidth to roughly 5–7 kHz for a 10× gain configuration — adequate for DC load monitoring, battery charge/discharge profiling, and overcurrent detection where the fault response time is tens of milliseconds. Faster transients (switching-edge ring, inrush spikes above 10 kHz) will be attenuated before they reach the ADC input. ## Supply Range and Quiescent Draw for Always-On Rails Operating from 1.7 V to 5.5 V, the amplifier can be powered from a common 1.8 V, 3.3 V, or 5 V rail without an extra regulator. The 43 µA supply current makes it viable for always-on sense circuits in battery-powered equipment — a 1000 mAh cell running the amplifier continuously sees 2.9 years of standby before the sense circuit alone drains it. The rail-to-rail output swings within 10 mV of each supply at light load, preserving the full dynamic range of the downstream ADC. For a 5 V supply with a 100 mV full-scale shunt drop and a gain of 50 V/V, the output sits at 5 V — the rail-to-rail headroom keeps the signal from clipping. ## Package and Temperature Grade for Board Integration Supplied in a 6-DSBGA package measuring 1.17 × 0.77 mm, the INA191A3IYFDR occupies roughly 0.9 mm² of board area — suitable for space-constrained designs such as battery-pack monitor boards or compact power-management modules. The 0.4 mm ball pitch demands a controlled solder-paste stencil and a 2-layer board with micro-vias for fan-out to the inner layers. Rated for -40°C to +125°C ambient, the part covers the full automotive temperature grade (Grade 1 equivalent) and industrial extended-range applications. The Zero-Drift architecture maintains the 2.5 µV offset across the temperature band — no auto-zero cycling needed, so the sense output stays stable through a cold-crank or hot-soak condition.","metaTitle":"Texas Instruments INA191A3IYFDR Current Sense, 37 kHz","metaDescription":"INA191A3IYFDR Zero-Drift current sense amplifier, 1.7-5.5 V supply, 43 µA supply current, 2.5 µV offset, -40 to 125 °C. Active, ROHS3. Order for BOM.","metaKeywords":null},"attributes":{"series":"Zero-Drift","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Series":"Zero-Drift","Package":"Tape & Reel (TR); Cut Tape (CT)","Slew Rate":"0.3V/µs","Output Type":"Rail-to-Rail","Mounting Type":"Surface Mount","Amplifier Type":"Current Sense","Package / Case":"6-XFBGA, DSBGA","lifecycle_stage":"eol_hot","Current - Supply":"43µA","Number of Circuits":"1","Current - Input Bias":"100 pA","Operating Temperature":"-40°C ~ 125°C (TA)","Gain Bandwidth Product":"37 kHz","Voltage - Input Offset":"2.5 µV","Supplier Device Package":"6-DSBGA (1.17x0.77)","Voltage - Supply Span (Max)":"5.5 V","Voltage - Supply Span (Min)":"1.7 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.92","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.92000","currency":"USD"},{"qty":10,"price":"$2.62400","currency":"USD"},{"qty":25,"price":"$2.48040","currency":"USD"},{"qty":100,"price":"$2.14970","currency":"USD"},{"qty":250,"price":"$2.03944","currency":"USD"},{"qty":500,"price":"$1.82998","currency":"USD"},{"qty":1000,"price":"$1.56000","currency":"USD"},{"qty":3000,"price":"$1.56000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2b17da36d23c078c4c749ec3bfd8e6cc.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order INA191A3IYFDR or check availability?","answer":"The INA191A3IYFDR is an active Texas Instruments part in ROHS3-compliant 6-DSBGA packaging. It is available to order against an RFQ through independent distribution channels; current pricing and lead time are confirmed at quote time. The part ships in Tape & Reel or Cut Tape options — specify the reel quantity in the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/INA191A3IYFDR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/INA191A3IYFDR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}