{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1859B-050/TR","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1859B-050-TR","canonicalUrl":"https://icboms.com/analog-devices/DS1859B-050-TR","factsUrl":"https://icboms.com/api/mcp/products/DS1859B-050%2FTR","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS1859B-050/TR, dual 50kΩ non-volatile digital rheostat, linear taper, 256 taps, Serial interface, ±20% tolerance, 2.85V-5.5V supply, -40°C to 95°C, 16-TSSOP package.","salesMarkdown":"## Dual 50k rheostat with an on-die temperature sensor The Maxim Integrated DS1859B-050/TR is a dual-channel, non-volatile digital rheostat with a linear taper, 256 taps per channel, and a total end-to-end resistance of 50kΩ per channel. Each channel operates independently as a two-terminal variable resistor (rheostat configuration). The part integrates a temperature sensor on the same die, allowing the system to read die temperature over the serial interface and adjust the wiper setting accordingly — useful for closed-loop bias calibration or temperature-compensated trimming without an external thermistor. The 50 ppm/°C temperature coefficient keeps the set resistance stable across the rated temperature span — a practical concern when the rheostat sets a bias point or a reference current that must hold within a few percent over the equipment's operating season. ## 256 taps and non-volatile memory — what they mean for the BOM The ±20% resistance tolerance is the absolute end-to-end tolerance of the full 50kΩ resistor string. In a rheostat configuration the wiper resistance ratio between two positions is much tighter than the absolute value, so the tolerance mainly affects the total range available, not the step-to-step linearity. If the design requires a precise absolute resistance, plan for a one-time calibration step that stores the correction in the non-volatile register. ## Package and footprint Housed in a 16-TSSOP package (4.40 mm body width, 0.173-inch pitch), the DS1859B-050/TR is a surface-mount part that fits on a standard PCB without requiring a fine-pitch assembly line. The supplier device package is 16-TSSOP. The Bulk shipping option means the parts arrive in tubes or trays, not tape-and-reel — verify feeder compatibility if your CM runs a high-speed pick-and-place line that expects tape. ## Lifecycle and sourcing For a BOM line that needs a dual digital rheostat with an integrated temperature sensor, this part is a safe selection for new designs and ongoing production.","metaTitle":"DS1859B-050/TR Dual 50k Non-Volatile Digital Rheostat","metaDescription":"DS1859B-050/TR dual 50kΩ digital rheostat with linear taper, 256 taps, non-volatile memory, integrated temperature sensor. Active lifecycle, -40°C to 95°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Taper":"Linear","Package":"Bulk","Features":"Selectable Address, Temperature Sensor","Interface":"Serial","Tolerance":"±20%","Memory Type":"Non-Volatile","Configuration":"Rheostat","Mounting Type":"Surface Mount","Number of Taps":"256","Package / Case":"16-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.85V ~ 5.5V","Resistance (Ohms)":"50k","Number of Circuits":"2","Operating Temperature":"-40°C ~ 95°C","Supplier Device Package":"16-TSSOP","Temperature Coefficient (Typ)":"50ppm/°C"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.48","stockQuantity":0,"priceTiers":[{"qty":87,"price":"$3.48000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/591b8d701525e40848407a385c0de342.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does DS1859B-050/TR have an internal temperature sensor?","answer":"Yes — the DS1859B-050/TR integrates a temperature sensor on the same die. The die temperature can be read over the serial interface, enabling closed-loop calibration without an external thermistor."},{"question":"What is the resolution of DS1859B-050/TR?","answer":"The DS1859B-050/TR provides 256 wiper taps, giving roughly 0.4% of full-scale resolution per step. On the 50kΩ version that is approximately 195Ω per tap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1859B-050-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1859B-050-TR 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}}