{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX549ACUA+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX549ACUA~3","canonicalUrl":"https://icboms.com/analog-devices/MAX549ACUA~3","factsUrl":"https://icboms.com/api/mcp/products/MAX549ACUA%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX549ACUA+ dual 8-bit voltage-output DAC, SPI, R-2R, 4µs settling, 2.5-5.5V, 8-uMAX/uSOP, tube.","salesMarkdown":"## Dual 8-bit DAC in a small serial package The MAX549ACUA+ is a dual 8-bit, voltage-output digital-to-analog converter from Maxim Integrated, built around an R-2R ladder architecture. It packs two independent DACs into an 8-pin 8-uMAX/uSOP package — about 3×3 mm — so it fits on tight mixed-signal boards where a separate reference and output buffer would eat real estate. The SPI data interface keeps the pin count low: three wires (SCLK, DIN, CS) plus the output and supply rails. Settling time is 4 µs typical, which means the output reaches within ½ LSB of the final value in that window — fast enough for a control-loop update running at a few tens of kilohertz, or for trimming a bias voltage during power-on calibration. ## Supply rails and output drive That simplifies the power tree: one LDO or a clean 3.3 V bus feeds the whole part. The output is voltage-unbuffered, so the DAC's output impedance is the R-2R ladder resistance (typically 10 kΩ). It drives a high-impedance load directly, but for a 50 Ω or 100 Ω input, add an external op-amp buffer. The reference input is external, so the full-scale output voltage equals the reference voltage times the digital code divided by 256. An external 2.5 V reference gives a 0 V to 2.5 V output span; a 4.096 V reference gives a 0 V to 4.096 V span. The INL/DNL spec is -, ±0.9 LSB max — the DNL is guaranteed monotonic, meaning the output always increases for increasing digital codes, which matters in closed-loop control where a non-monotonic step would reverse the feedback sign. ## Temperature grade and board-fit That covers most benchtop instruments, industrial control cabinets with HVAC, and consumer electronics. For an engine bay or outdoor enclosure that sees -20°C, look at the industrial-temperature variant in the same family. The 8-TSSOP/8-MSOP footprint (0.118-inch body width, 3.00 mm) is a standard JEDEC outline. The 8-uMAX/uSOP supplier package is Maxim's own naming for the same 3×3 mm MSOP-8. No exposed pad; thermal dissipation is through the leads only.","metaTitle":"MAX549ACUA+ Dual 8-Bit DAC, SPI, 4µs, 8-uMAX","metaDescription":"MAX549ACUA+ dual 8-bit voltage-output DAC, SPI interface, 4µs settling time, R-2R architecture, 2.5-5.5V supply, 8-uMAX package. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Output Type":"Voltage - Unbuffered","Architecture":"R-2R","INL/DNL (LSB)":"-, ±0.9 (Max)","Mounting Type":"Surface Mount","Settling Time":"4µs (Typ)","Data Interface":"SPI","Number of Bits":"8","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","Reference Type":"External","lifecycle_stage":"eol_hot","Differential Output":"No","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"8-uMAX/uSOP","Number of D/A Converters":"2","Voltage - Supply, Analog":"2.5V ~ 5.5V","Voltage - Supply, Digital":"2.5V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.52","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.52000","currency":"USD"},{"qty":10,"price":"$7.69700","currency":"USD"},{"qty":25,"price":"$7.33920","currency":"USD"},{"qty":100,"price":"$6.37240","currency":"USD"},{"qty":250,"price":"$6.08600","currency":"USD"},{"qty":500,"price":"$5.54900","currency":"USD"},{"qty":1000,"price":"$5.37000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/73d9f1d6305443a913b5a93a4008bfc0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output type of MAX549ACUA+?","answer":"Voltage-unbuffered — the DAC output is the R-2R ladder's output through a unity-gain buffer internal to the DAC core. It is not a rail-to-rail output; the output swing is 0 V to VREF (or VREF to 0 V depending on the code). For loads under 10 kΩ, add an external buffer."},{"question":"What package does MAX549ACUA+ come in?","answer":"Supplied in a tube of 8-TSSOP/8-MSOP packages (0.118-inch body width, 3.00 mm)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX549ACUA~3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX549ACUA~3 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}}