{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"OPA4345UA","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"OPA4345UA","canonicalUrl":"https://icboms.com/texas-instruments/OPA4345UA","factsUrl":"https://icboms.com/api/mcp/products/OPA4345UA","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments MicroAmplifier™ series, OPA4345UA, quad CMOS rail-to-rail output op-amp, 3 MHz gain bandwidth, 2V/µs slew rate, 150µA supply, 14-SOIC package, -40°C to 85°C.","salesMarkdown":"## Quad CMOS op-amp for low-power signal chains The Texas Instruments OPA4345UA is a quad-channel CMOS operational amplifier from the MicroAmplifier™ series, with four rail-to-rail output amplifiers in a 14-SOIC package. It has a 3 MHz gain-bandwidth product and 2V/µs slew rate, and draws 150 µA total supply current. ## 150 µA supply — the power budget decider The headline number for this part is the 150 µA supply current across all four amplifiers. In a three-wire 4-20 mA transmitter, the total electronics budget is typically 3.5 mA to leave headroom for the sensor and loop. Four OPA4345UA channels consume 0.15 mA of that — leaving the rest for the sensor excitation, reference, and microcontroller. The 0.2 pA CMOS input bias current means the amplifier does not load high-impedance sources like pH probes or photodiode transimpedance stages, preserving the signal integrity without a separate buffer. Rail-to-rail output swing lets each channel drive an ADC input or a comparator threshold without losing headroom at the rails. The 15 mA per-channel output current is enough to drive a reference input or a modest cable capacitance, though not intended for heavy loads like solenoids or relays.","metaTitle":"TI OPA4345UA Quad CMOS Op-Amp, 3 MHz GBW","metaDescription":"Texas Instruments OPA4345UA quad CMOS op-amp: 3 MHz GBW, 2V/µs slew rate, rail-to-rail output, 150µA supply. Industrial temp -40°C to 85°C.","metaKeywords":null},"attributes":{"series":"MicroAmplifier™","packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"MicroAmplifier™","Package":"Bulk","Slew Rate":"2V/µs","Output Type":"Rail-to-Rail","Mounting Type":"Surface Mount","Amplifier Type":"CMOS","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"150µA (x4 Channels)","Number of Circuits":"4","Current - Input Bias":"0.2 pA","Operating Temperature":"-40°C ~ 85°C","Gain Bandwidth Product":"3 MHz","Voltage - Input Offset":"200 µV","Supplier Device Package":"14-SOIC","Current - Output / Channel":"15 mA","Voltage - Supply Span (Max)":"5.5 V","Voltage - Supply Span (Min)":"2.5 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.02","priceTiers":[{"qty":149,"price":"$2.02000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/OPA4345UA/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent for OPA4345UA?","answer":"The closest functional peer in the same quad CMOS rail-to-rail class is the OPA4374AIPWT, which offers a 6.5 MHz gain-bandwidth and 5 V/µs slew rate versus the OPA4345UA's 3 MHz and 2 V/µs. The OPA4374 draws 600 µA supply current — four times the OPA4345UA's 150 µA — so the OPA4345UA is the lower-power choice for battery-operated designs where bandwidth above 3 MHz is not needed. Both are 14-pin SOIC, but verify pin compatibility in the respective datasheets."},{"question":"What is the slew rate of OPA4345UA?","answer":"The slew rate is 2 V/µs. At 3 MHz gain-bandwidth, this supports full-power bandwidth up to roughly 318 kHz for a 2 V peak-to-peak output swing — adequate for audio and low-frequency sensor signals, but not for video or fast pulse amplification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/OPA4345UA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/OPA4345UA 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}}