{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX31820MCR+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX31820MCR","canonicalUrl":"https://icboms.com/analog-devices/MAX31820MCR","factsUrl":"https://icboms.com/api/mcp/products/MAX31820MCR%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX31820MCR+, Digital Local Temperature Sensor, 11 b Resolution, 1-Wire® Output, TO-226-3 / TO-92-3 (TO-226AA) Package, Through Hole, -55°C to 125°C Operating Range, 3V to 3.7V Supply.","salesMarkdown":"## What this sensor is and where it fits The Maxim Integrated MAX31820MCR+ is a digital local temperature sensor that communicates over a 1-Wire bus and reports readings with 11-bit resolution. It is packaged in a through-hole TO-92-3 case, making it a direct mechanical fit for existing sensor sockets or breadboard layouts. The part is rated for the full -55°C to 125°C operating range, which qualifies it for industrial process monitoring, HVAC duct sensing, cold-chain logging, and under-hood automotive temperature measurement where the sensor must survive extreme ambient conditions. ## Accuracy across the temperature span The headline accuracy of ±0.5°C is specified only within the 10°C to 45°C band. Outside that narrow window — from -55°C up to 10°C and from 45°C up to 125°C — the guaranteed accuracy relaxes to ±2°C. For a BOM decision this means the sensor is well suited for comfort-zone monitoring (indoor climate, server-room ambient, medical storage) where the ±0.5°C figure holds. If the application routinely sees the full -55°C to 125°C range, the ±2°C worst-case figure must be budgeted into the system error stack. ## Lifecycle and sourcing posture The MAX31820MCR+ carries an active lifecycle status and is ROHS3 compliant. For a BOM line this means no last-time-buy urgency and no forced redesign to a second source.","metaTitle":"MAX31820MCR+ Digital Temperature Sensor, TO-92-3, 1-Wire","metaDescription":"Maxim MAX31820MCR+ digital local temperature sensor, TO-92-3 package, 1-Wire interface, ±0.5°C accuracy, -55°C to 125°C range. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Bulk","Resolution":"11 b","Output Type":"1-Wire®","Sensor Type":"Digital, Local","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA)","Test Condition":"10°C ~ 45°C (-55°C ~ 125°C)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.7V","Operating Temperature":"-55°C ~ 125°C","Supplier Device Package":"TO-92-3","Accuracy - Highest (Lowest)":"±0.5°C (±2°C)","Sensing Temperature - Local":"-55°C ~ 125°C"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.76","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.76000","currency":"USD"},{"qty":5,"price":"$4.20400","currency":"USD"},{"qty":10,"price":"$3.71400","currency":"USD"},{"qty":25,"price":"$3.01320","currency":"USD"},{"qty":50,"price":"$2.66260","currency":"USD"},{"qty":100,"price":"$2.59260","currency":"USD"},{"qty":500,"price":"$2.17216","currency":"USD"},{"qty":1000,"price":"$2.03203","currency":"USD"},{"qty":5000,"price":"$1.89189","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX31820.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is MAX31820MCR+ a direct replacement for DS18B20?","answer":"The MAX31820MCR+ is pin-compatible with the DS18B20 in the same TO-92 package and uses the same 1-Wire protocol, but there are two differences to verify in your firmware. First, the MAX31820MCR+ defaults to 11-bit resolution (0.0625°C per LSB) while the DS18B20 powers up at 12-bit. Second, the supply range is narrower — 3V to 3.7V versus the DS18B20's 3V to 5.5V. If your design runs on a 5V rail, the MAX31820MCR+ will not work. On a 3.3V rail with the resolution difference handled in code, it is a drop-in swap."},{"question":"What is the accuracy of MAX31820MCR+ at different temperatures?","answer":"The sensor guarantees ±0.5°C accuracy in the 10°C to 45°C band. Outside that range, across the full -55°C to 125°C operating window, the accuracy is ±2°C. There is no intermediate specification for, say, -20°C to 85°C — the datasheet gives only these two zones."},{"question":"Does MAX31820MCR+ work with 3.3V systems?","answer":"Yes, the 3V to 3.7V supply range includes 3.3V. Provided the 3.3V rail is regulated to within ±5% (staying above 3.0V and below 3.7V), the sensor operates correctly. A standard 3.3V LDO with ±2% tolerance is sufficient."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX31820MCR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX31820MCR 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}}