{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM385M/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM385M-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM385M-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM385M%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM385M/NOPB, adjustable shunt voltage reference, ±2% tolerance, 1.24V to 5.3V output, 55 µA min cathode current, 20 mA output, 50 µVrms noise, 150ppm/°C drift, 8-SOIC, 0°C to 70°C.","salesMarkdown":"## Shunt reference basics for the BOM It operates like a low-power Zener, regulating the voltage across its terminals by shunting current through an external series resistor. ## Setting the bias current matters As a shunt reference, the LM385M/NOPB requires a minimum cathode current of 55 µA to maintain regulation. The external series resistor must be sized to deliver this current plus the load current at the minimum supply voltage. Maximum output current is 20 mA. For noise-sensitive circuits like ADC references, this should be factored into the signal chain budget.","metaTitle":"LM385M/NOPB Shunt Voltage Reference, Adjustable ±2%, 8-SOIC","metaDescription":"Texas Instruments LM385M/NOPB adjustable shunt voltage reference. Output range 1.24V to 5.3V, ±2% tolerance, 55 µA min cathode current. 8-SOIC, active.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Tolerance":"±2%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"20 mA","Current - Supply":"-","Current - Cathode":"55 µA","Base Product Number":"LM385","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"50µVrms","Operating Temperature":"0°C~70°C(TA)","Voltage - Output (Max)":"5.3 V","Supplier Device Package":"8-SOIC","Temperature Coefficient":"150ppm/°C","Voltage - Output (Min/Fixed)":"1.24V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4199e8d59659e82b20c871ef2cbe4629.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM385M%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the minimum cathode current for LM385M/NOPB?","answer":"The minimum cathode current required for regulation is 55 µA. The external series resistor must be selected to ensure this current flows under all load conditions."},{"question":"Can LM385M/NOPB replace TL431?","answer":"Both are shunt references, but the TL431 typically has a 2.5 V reference and higher output current. The LM385M/NOPB has a 1.24 V minimum output and 20 mA maximum output. Pinout and resistor divider values differ, so a direct replacement is not guaranteed without circuit modification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM385M-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM385M-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}