{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX1231BETI+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX1231BETI","canonicalUrl":"https://icboms.com/analog-devices/MAX1231BETI","factsUrl":"https://icboms.com/api/mcp/products/MAX1231BETI%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX1231BETI+, 12-bit SAR ADC, 300k sampling rate, SPI, 8 or 16 differential/single-ended inputs, internal temperature sensor, 2.7V–3.6V supply, -40°C to 85°C, 28-TQFN (5x5).","salesMarkdown":"## On-chip temperature sensor saves a BOM line The integrated temperature sensor reports the die temperature directly through the ADC. If your system needs to monitor ambient temperature for fan control, thermal derating, or compensation of external sensors, this feature eliminates a separate thermistor or RTD and its signal-conditioning circuit. The sensor reading is available on a dedicated input channel through the same SPI interface. ## Industrial temperature rating and package The -40°C to 85°C operating range covers outdoor telecom cabinets, motor-drive enclosures, and factory-floor automation panels. The 28-TQFN (5x5 mm) with exposed pad conducts heat to the PCB ground plane — a solid thermal via pattern under the pad keeps the die temperature stable during continuous conversion at 300k samples per second. ## Active production — no LTB risk for new designs The MAX1231BETI+ carries an Active lifecycle status and is ROHS3 compliant.","metaTitle":"MAX1231BETI+ ADC 12-Bit SAR 300k SPI 28-TQFN","metaDescription":"MAX1231BETI+ 12-bit SAR ADC, 300k samples/sec, SPI interface, internal temp sensor, 8/16 inputs, -40 to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Tube","Features":"Temperature Sensor","Input Type":"Differential, Single Ended","Architecture":"SAR","Configuration":"S/H-ADC","Mounting Type":"Surface Mount","Data Interface":"SPI","Number of Bits":"12","Package / Case":"28-WFQFN Exposed Pad","Reference Type":"External, Internal","Ratio - S/H:ADC":"1:1","lifecycle_stage":"eol_hot","Number of Inputs":"8, 16","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"28-TQFN (5x5)","Number of A/D Converters":"1","Voltage - Supply, Analog":"2.7V ~ 3.6V","Voltage - Supply, Digital":"2.7V ~ 3.6V","Sampling Rate (Per Second)":"300k"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$23.02","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$23.02000","currency":"USD"},{"qty":10,"price":"$21.23200","currency":"USD"},{"qty":25,"price":"$20.27760","currency":"USD"},{"qty":100,"price":"$18.13070","currency":"USD"},{"qty":250,"price":"$17.29576","currency":"USD"},{"qty":500,"price":"$16.46078","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7ea35c5bc80b7e0ef367fd8c1d6ed694.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does MAX1231BETI+ have an internal temperature sensor?","answer":"Yes, it includes an on-chip temperature sensor that reports die temperature through the ADC over the SPI interface."},{"question":"Is MAX1231BETI+ compatible with 3.3V logic?","answer":"Yes, the digital supply range of 2.7V to 3.6V means the SPI interface operates at 3.3V logic levels directly — no level shifting needed."},{"question":"What is the closest pin-compatible alternative to MAX1231BETI+?","answer":"Within the same Maxim family, the MAX1231 (without the BETI+ suffix) is functionally similar but may differ in package or temperature grade. Verify pin compatibility against the specific variant datasheet before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX1231BETI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX1231BETI when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}