{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"INA128UA","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"INA128UA","canonicalUrl":"https://icboms.com/texas-instruments/INA128UA","factsUrl":"https://icboms.com/api/mcp/products/INA128UA","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments INA128UA, precision instrumentation amplifier, single circuit, 1.3 MHz -3dB bandwidth, 4 V/µs slew rate, 8-SOIC package, surface mount, -40°C to 125°C operating temperature.","salesMarkdown":"## What this precision instrumentation amp does Texas Instruments INA128UA is a precision instrumentation amplifier in an 8-SOIC package, designed for accurate differential signal conditioning in bridge sensors, medical instrumentation, and industrial data-acquisition front-ends. Its 25 µV input offset voltage and 2 nA input bias current let it resolve microvolt-level signals without external trimming, while the 4 V/µs slew rate and 1.3 MHz bandwidth handle fast transient edges from PWM sensor outputs or multiplexed channels. ## Operating range and supply considerations The amplifier runs from a single supply as low as 4.5 V up to 36 V total span, making it usable on common 5 V or ±15 V rails. Quiescent current is 700 µA, which keeps the thermal budget manageable in densely populated boards. Housed in an 8-SOIC (0.154\" body width), the INA128UA is a straightforward hand-solder or reflow part. The SOIC-8 footprint is low-thermal-mass — it reflows cleanly with a standard 260°C peak profile and is easy to remove with hot air without lifting pads. The INA128UA is Active with no announced end-of-life, and it is ROHS3 Compliant. For long-term BOM planning, there is no immediate obsolescence risk.","metaTitle":"Texas Instruments INA128UA Instrumentation Amplifier","metaDescription":"Precision instrumentation amp in 8-SOIC. 25 µV offset, 2 nA bias, 700 µA supply. -40°C to 125°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Slew Rate":"4V/µs","Output Type":"-","Mounting Type":"Surface Mount","-3db Bandwidth":"1.3 MHz","Amplifier Type":"Instrumentation","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Supply":"700µA","Number of Circuits":"1","Base Product Number":"INA128","Current - Input Bias":"2 nA","Operating Temperature":"-40°C ~ 125°C","Voltage - Input Offset":"25 µV","Supplier Device Package":"8-SOIC","Current - Output / Channel":"15 mA","Voltage - Supply Span (Max)":"36 V","Voltage - Supply Span (Min)":"4.5 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.7000","priceTiers":[{"qty":1,"price":"$10.70000","currency":"USD"},{"qty":10,"price":"$9.67000","currency":"USD"},{"qty":75,"price":"$9.22000","currency":"USD"},{"qty":150,"price":"$8.00560","currency":"USD"},{"qty":300,"price":"$7.64580","currency":"USD"},{"qty":525,"price":"$6.97118","currency":"USD"},{"qty":1050,"price":"$6.07167","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/38ef53acfab362c1f4307adc148d9e91.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/INA128UA/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent or replacement for INA128UA?","answer":"The INA128UA is a classic precision instrumentation amplifier. A direct parametric fit would need a similar offset voltage (25 µV), bias current (2 nA), and bandwidth (1.3 MHz). The INA4290A2IRGVR is a different class — it is a quad current-sense amplifier, not a general-purpose instrumentation amp, so it is not a pin-compatible substitute. For a pin-compatible second source, look at the INA128 family from Texas Instruments; no other manufacturer offers an exact second source for this part number."},{"question":"Can INA128UA be used in single-supply applications?","answer":"Yes, the supply span range is 4.5 V to 36 V, so it can run from a single 5 V rail. Keep in mind that the output does not swing rail-to-rail — the common-mode input range also stops short of the positive rail — so headroom is needed at both ends."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/INA128UA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/INA128UA 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}}