{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"OA4ZHA33Q","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"OA4ZHA33Q","canonicalUrl":"https://icboms.com/stmicroelectronics/OA4ZHA33Q","factsUrl":"https://icboms.com/api/mcp/products/OA4ZHA33Q","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics OA4ZHA33Q, zero-drift operational amplifier, quad 4-circuit, 400 kHz gain bandwidth, 0.19 V/µs slew rate, rail-to-rail output, 1.8 V to 5.5 V supply, 16-VFQFN exposed pad, tape & reel.","salesMarkdown":"## Quad zero-drift amp at 31 µA per channel — the battery-life trade-off The OA4ZHA33Q is a quad-channel zero-drift operational amplifier from STMicroelectronics, packing four independent amplifiers into a 3x3 mm 16-QFN package. The zero-drift topology continuously autozeroes the input offset, holding it to a typical 1 µV — two orders of magnitude below a standard precision op-amp — so the output error from offset drift over temperature is negligible in DC-coupled signal chains. That is low enough to leave a 100 mAh coin cell powering the amplifier for over 800 hours of continuous operation — relevant for battery-powered sensor interfaces where the op-amp is always on. ## 400 kHz GBP with 0.19 V/µs slew — the bandwidth ceiling for low-frequency precision The gain-bandwidth product of 400 kHz and slew rate of 0.19 V/µs set the usable signal bandwidth. For a gain-of-10 stage, the closed-loop bandwidth drops to 40 kHz — adequate for thermocouple conditioning, strain-gauge amplification, or audio-frequency filter stages, but not for high-speed ADC drivers or video paths. The rail-to-rail output stage swings within 50 mV of each supply rail, preserving dynamic range in low-voltage single-supply designs. Input bias current is 70 pA typical, and the input offset voltage is 1 µV typical. The low bias current means the voltage error from source impedance is minimal — a 10 kΩ source adds only 0.7 µV of additional offset, keeping the DC accuracy in the microvolt range. ## Industrial temperature grade and 3x3 mm QFN — board-fit for harsh environments Mounting is surface-mount only. The tape-and-reel packaging option indicates it is supplied on 7-inch or 13-inch reels for automated pick-and-place assembly. The 0.5 mm pitch QFN demands a solder-paste stencil aperture that matches the land pattern — a 0.25 mm square aperture per pad is a common starting point. ## Active lifecycle and ROHS3 compliance It is ROHS3 compliant, meaning no restricted substances above the exemption thresholds — no lead, cadmium, mercury, or phthalates in the package or plating. For new designs, the quad-channel TSZ124IYPT (automotive-qualified, AEC-Q100) shares the same 400 kHz GBP, 0.19 V/µs slew rate, and 1 µV offset — it is the automotive-grade sibling in the same zero-drift family. The dual-channel TSZ122IST and TSZ122IYDT are the two-channel variants if the BOM does not need four amplifiers.","metaTitle":"STMicroelectronics OA4ZHA33Q Zero-Drift Op-Amp, 400 kHz","metaDescription":"STMicroelectronics OA4ZHA33Q zero-drift op-amp, 4 circuits, 400 kHz GBP, 1 µV offset, 31 µA supply, -40 to 125°C. Active, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Slew Rate":"0.19V/µs","Output Type":"Rail-to-Rail","Mounting Type":"Surface Mount","Amplifier Type":"Zero-Drift","Package / Case":"16-VFQFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Supply":"31µA (x4 Channels)","Number of Circuits":"4","Current - Input Bias":"70 pA","Operating Temperature":"-40°C ~ 125°C","Gain Bandwidth Product":"400 kHz","Voltage - Input Offset":"1 µV","Supplier Device Package":"16-QFN (3x3)","Current - Output / Channel":"18 mA","Voltage - Supply Span (Max)":"5.5 V","Voltage - Supply Span (Min)":"1.8 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.46","priceTiers":[{"qty":1,"price":"$4.46000","currency":"USD"},{"qty":10,"price":"$4.00500","currency":"USD"},{"qty":25,"price":"$3.78640","currency":"USD"},{"qty":100,"price":"$3.28160","currency":"USD"},{"qty":250,"price":"$3.11328","currency":"USD"},{"qty":500,"price":"$2.79354","currency":"USD"},{"qty":1000,"price":"$2.77830","currency":"USD"},{"qty":3000,"price":"$2.77830","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ad34f2446a28c709a53f163d28b6e88d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/OA4ZHA33Q/alternatives.json"},"ai":{"faq":[{"question":"Is OA4ZHA33Q suitable for battery-powered applications?","answer":"Yes. The total chip supply of 124 µA at 3 V is 372 µW — low enough for continuous operation from a coin cell or a single Li-ion cell without a boost converter. The rail-to-rail output maintains dynamic range even as the battery discharges to 1.8 V."},{"question":"What is the equivalent or replacement for OA4ZHA33Q?","answer":"Within the same zero-drift family, the TSZ124IYPT is the quad-channel automotive-grade equivalent (AEC-Q100 qualified) with identical 400 kHz GBP, 0.19 V/µs slew rate, and 1 µV offset. The TSZ122IST and TSZ122IYDT are the dual-channel versions."},{"question":"What is OA4ZHA33Q's listed slew rate?","answer":"The slew rate is 0.19 V/µs. Combined with the 400 kHz gain-bandwidth product, this limits the large-signal bandwidth — a 2 V peak-to-peak output step slews in about 10.5 µs, setting the settling time for step inputs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/OA4ZHA33Q","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/OA4ZHA33Q 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}}