{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4041BICT-1.2","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM4041BICT-1.2","canonicalUrl":"https://icboms.com/stmicroelectronics/LM4041BICT-1.2","factsUrl":"https://icboms.com/api/mcp/products/LM4041BICT-1.2","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM4041BICT-1.2 precision shunt voltage reference, fixed 1.225 V output, ±0.2% tolerance, 100 ppm/°C, 12 mA output, SOT-323-5, -40°C to 85°C.","salesMarkdown":"## Fixed 1.225 V shunt reference in SOT-323-5 The STMicroelectronics LM4041BICT-1.2 is a precision shunt voltage reference delivering a fixed 1.225 V output with ±0.2% initial tolerance. It operates as a two-terminal shunt (Zener-like) device, requiring only an external series resistor to set the bias current from the supply rail. It is suited for precision analog bias, ADC/DAC reference, and low-drift voltage clamping in power supplies and sensor interfaces. ## Tolerance and drift — the precision floor The ±0.2% initial tolerance (B-grade) places this part between the tighter A-grade (±0.1%) and the looser C-grade (±0.5%) in the LM4041 family. For a 1.225 V output, ±0.2% translates to a maximum initial error of ±2.45 mV — tight enough for most 12-bit ADC references without external trimming. The 60 µVrms noise (10 Hz to 10 kHz) is low enough for precision analog front-ends, though a bypass capacitor at the reference output further reduces wideband noise. ## Shunt topology — resistor selection matters As a shunt reference, the LM4041BICT-1.2 conducts current from cathode to anode, and the external series resistor must be chosen to maintain the cathode current between the 50 µA minimum and 12 mA maximum. The resistor value is calculated as (V_supply - 1.225 V) / I_bias, where I_bias must exceed the load current plus the 50 µA minimum cathode current. The 12 mA maximum output current limits the load this reference can drive directly. For higher load currents, a buffer amplifier is needed; for lower loads, the 50 µA minimum cathode current ensures the shunt stays in regulation.","metaTitle":"LM4041BICT-1.2 Shunt Voltage Reference, 1.225 V ±0.2%","metaDescription":"STMicroelectronics LM4041BICT-1.2 precision shunt reference, fixed 1.225 V output, ±0.2% tolerance, 100 ppm/°C drift, SOT-323-5.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.2%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"5-TSSOP, SC-70-5, SOT-353","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"12 mA","Current - Supply":"-","Current - Cathode":"50 µA","Base Product Number":"LM4041","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"60µVrms","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-323-5","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"1.225V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6960","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/06ccf6ae1f4c6fea187fcb5187905d18.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between LM4041BICT-1.2 and LM4041AICT-1.2?","answer":"The primary difference is initial tolerance: the A-grade offers ±0.1%, while this B-grade offers ±0.2%. Both are otherwise identical in output voltage, package, temperature range, and pinout, making the A-grade the tighter-tolerance choice for higher-precision applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM4041BICT-1.2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM4041BICT-1.2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T17:38:08.005Z","lastPublished":"2026-07-16T17:38:08.005Z","indexable":true}}