{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"OPA2381AIDGKT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"OPA2381AIDGKT","canonicalUrl":"https://icboms.com/texas-instruments/OPA2381AIDGKT","factsUrl":"https://icboms.com/api/mcp/products/OPA2381AIDGKT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments OPA2381AIDGKT, dual transimpedance amplifier, 18 MHz gain bandwidth, 12V/µs slew rate, 3 pA input bias, 7 µV offset, rail-to-rail output, 8-VSSOP package, -40 to 125°C.","salesMarkdown":"## Transimpedance front-end in an 8-VSSOP The OPA2381AIDGKT: Its 18 MHz gain-bandwidth product and 12V/µs slew rate let it handle fast optical pulses from avalanche photodiodes or high-speed PIN diodes, while the 3 pA input bias and 7 µV input offset keep the dark-current error and DC baseline drift low enough to skip a trim pot in many designs. The 8-VSSOP package keeps the photodiode and feedback components close, minimising parasitic capacitance at the summing node. ## 800 µA per channel — sizing the power rail Each amplifier draws 800 µA supply current, so the dual channel OPA2381 consumes 1.6 mA total at no load. In a battery-powered photodiode receiver or an optical smoke detector that runs 24/7, that quiescent current lands in the right budget tier — not the sub-µA micropower class, but well below the 2 mA to 3 mA per channel a general-purpose 18 MHz op-amp would burn. The 10 mA output current per channel can drive a 50 Ω load or a moderate ADC input directly. Rated across the full industrial temperature span, the OPA2381AIDGKT is specified for outdoor telecom enclosures, under-hood optical sensors, and process-control photodetectors.","metaTitle":"OPA2381AIDGKT Dual Transimpedance Op-Amp, 18 MHz, 12V/µs","metaDescription":"Texas Instruments OPA2381AIDGKT dual transimpedance amplifier in 8-VSSOP. 18 MHz GBW, 12V/µs slew rate, 3 pA bias, rail-to-rail output. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Slew Rate":"12V/µs","Output Type":"Rail-to-Rail","Mounting Type":"Surface Mount","Amplifier Type":"Transimpedance","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"800µA (x2 Channels)","Number of Circuits":"2","Current - Input Bias":"3 pA","Operating Temperature":"-40°C ~ 125°C","Gain Bandwidth Product":"18 MHz","Voltage - Input Offset":"7 µV","Supplier Device Package":"8-VSSOP","Current - Output / Channel":"10 mA","Voltage - Supply Span (Max)":"5.5 V","Voltage - Supply Span (Min)":"2.7 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.41","priceTiers":[{"qty":1,"price":"$3.41000","currency":"USD"},{"qty":10,"price":"$3.06300","currency":"USD"},{"qty":25,"price":"$2.89520","currency":"USD"},{"qty":100,"price":"$2.50930","currency":"USD"},{"qty":250,"price":"$2.38064","currency":"USD"},{"qty":500,"price":"$2.13616","currency":"USD"},{"qty":1250,"price":"$1.82100","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f33e02ddf7b8add37391353f33d9e9e7.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/OPA2381AIDGKT/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between OPA2381AIDGKT and OPA2381AIDGKR?","answer":"Both are the same dual transimpedance amplifier die in the same 8-VSSOP package. The suffix difference is the shipping medium: AIDGKT ships in Tape & Reel, while AIDGKR ships in Cut Tape. Electrical characteristics are identical."},{"question":"What is a transimpedance amplifier?","answer":"A transimpedance amplifier (TIA) converts an input current — typically from a photodiode, photomultiplier, or other current-output sensor — into a proportional output voltage. The OPA2381 is specifically designed for this role, with the low input bias current (3 pA) and wide gain-bandwidth (18 MHz) needed to amplify small photocurrents without loading the sensor."},{"question":"What is the bandwidth of OPA2381?","answer":"The usable bandwidth in a transimpedance configuration depends on the feedback resistor and the photodiode capacitance, but the 18 MHz GBW supports photodiode signal bandwidths in the low-MHz range with adequate phase margin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/OPA2381AIDGKT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/OPA2381AIDGKT 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}}