{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"OPA381AIDGKR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"OPA381AIDGKR","canonicalUrl":"https://icboms.com/texas-instruments/OPA381AIDGKR","factsUrl":"https://icboms.com/api/mcp/products/OPA381AIDGKR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments OPA381AIDGKR, Transimpedance Amplifier, 1 Circuit, 18 MHz Gain Bandwidth, 12 V/µs Slew Rate, 3 pA Input Bias, 7 µV Offset, 2.7 V to 5.5 V Supply, 8-VSSOP Package, -40°C to 125°C.","salesMarkdown":"## 18 MHz transimpedance amplifier for photodiode front-ends Its 18 MHz gain-bandwidth product and 12 V/µs slew rate support fast optical pulse detection, while the 3 pA input bias current and 7 µV input offset voltage minimize DC error in low-light measurements. Applications include optical sensors, medical diagnostics, and industrial photodetection chains. ## 3 pA input bias — why it matters for photodiode interfaces In a transimpedance configuration, the input bias current flows through the feedback resistor, creating a DC offset voltage at the output. At 3 pA, the OPA381AIDGKR keeps this error negligible even with large feedback resistors used in low-light applications. Compare this to a general-purpose op-amp with nanoamp bias, which would swamp a small photocurrent signal. The 7 µV input offset voltage further tightens the baseline accuracy. For a photodiode producing 1 nA through a 1 MΩ feedback resistor, the signal is 1 mV — the offset contribution is less than 1% of that. ## 8-VSSOP package — footprint and layout notes The small footprint suits space-constrained optical modules.","metaTitle":"Texas Instruments OPA381AIDGKR Transimpedance Op-Amp, 18 MHz","metaDescription":"Texas Instruments OPA381AIDGKR transimpedance amplifier: 18 MHz GBW, 3 pA input bias, 7 µV offset, 12 V/µs slew rate, -40 to 125°C, 8-VSSOP. 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","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","Number of Circuits":"1","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":"$2.27","priceTiers":[{"qty":1,"price":"$2.27000","currency":"USD"},{"qty":10,"price":"$2.03900","currency":"USD"},{"qty":25,"price":"$1.92400","currency":"USD"},{"qty":100,"price":"$1.63920","currency":"USD"},{"qty":250,"price":"$1.53912","currency":"USD"},{"qty":500,"price":"$1.34672","currency":"USD"},{"qty":1000,"price":"$1.11586","currency":"USD"},{"qty":2500,"price":"$1.08900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f33e02ddf7b8add37391353f33d9e9e7.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/OPA381AIDGKR/alternatives.json"},"ai":{"faq":[{"question":"Is OPA381AIDGKR suitable for low-light photodetection?","answer":"Yes. The combination of 3 pA input bias current, 7 µV offset, and 18 MHz gain-bandwidth makes it well-suited for low-light photodiode front-ends where signal levels are small and bandwidth is needed for pulse detection."},{"question":"Does OPA381AIDGKR have a shutdown mode?","answer":"The evidence does not list a shutdown or power-down feature. The part draws a continuous 800 µA supply current when active."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/OPA381AIDGKR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/OPA381AIDGKR 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}}