{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"AD5274BCPZ-20-RL7","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"AD5274BCPZ-20-RL7","canonicalUrl":"https://icboms.com/analog-devices/AD5274BCPZ-20-RL7","factsUrl":"https://icboms.com/api/mcp/products/AD5274BCPZ-20-RL7","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices AD5274BCPZ-20-RL7, 20kOhm digital rheostat, 256 taps, I2C interface, ±1% tolerance, non-volatile memory, 10-LFCSP-WD (3x3mm) package, Tape & Reel.","salesMarkdown":"## Package and integration story The AD5274BCPZ-20-RL7 is a 20 kOhm digital rheostat in a 10-lead LFCSP-WD (3x3 mm) package — the exposed paddle underneath is the thermal path, not a signal connection, so the board footprint needs a thermal via array under the pad to pull heat into the ground plane. The 0.5 mm pitch demands a soldermask-defined pad and a reflow profile that matches the lead-free paste; a hot-air rework station with a fine nozzle is the safe removal method. The I2C interface runs on two wires (SDA, SCL) with the address set by a logic-level pin — the Selectable Address feature lets up to two of these share the same bus without a multiplexer, as long as the address pin is tied high or low. Pull-up resistors to the supply rail are required on both lines; the 400 kHz standard-mode clock is fine for the 256-tap write cycle. ## What the 256 taps and 5 ppm/°C tempco mean for your circuit 256 taps across 20 kOhm gives a step size of about 78 ohms — fine enough for trimming a voltage divider or setting a bias current in a feedback loop, but too coarse for precision setpoints where a 1% resistor tolerance already eats half the step. The 5 ppm/°C temperature coefficient means the end-to-end resistance drifts about 0.1 ohm per degree C — negligible in a lab environment but worth budgeting in an engine bay that sees 105°C ambient. The wiper resistance is 35 ohms typical — at the lowest code (wiper at the B terminal) the total resistance is 20 kOhm plus 35 ohms, which is a 0.175% error. At mid-scale the wiper resistance is a smaller fraction of the total, but in a rheostat configuration the wiper resistance adds directly to the series path, so a 35-ohm offset matters if the circuit expects a true zero-ohm minimum. ## Lifecycle and compliance — still active, no end-of-life watch The tape-and-reel packaging (7-inch reel, 3000 pieces per reel) is the standard carrier for the LFCSP package — the embossed pocket protects the exposed pad from mechanical damage during shipping. Cut-tape quantities are available for prototyping. ## How it compares to the AD5274BRMZ-20 and AD5272BRMZ-20-RL7 The AD5274BRMZ-20 is the same die in an MSOP-10 package — same 256 taps, same 20 kOhm, same I2C interface, but the MSOP has no exposed pad and a different pinout. The AD5274BCPZ-20-RL7 will not drop into a board laid out for the BRMZ without a footprint change; the LFCSP's thermal pad needs a different land pattern and via placement. The AD5272BRMZ-20-RL7 offers 1024 taps instead of 256 — four times the resolution for finer adjustment — but uses the same I2C protocol and the same 20 kOhm range. The trade-off is a longer write time per tap (the 1024-step part takes more clock cycles to load the full register) and a slightly higher cost per unit. For a trimming application that only needs 1% accuracy, the 256-tap AD5274 is sufficient; for a precision calibration loop, the 1024-tap AD5272 is the better fit.","metaTitle":"AD5274BCPZ-20-RL7 20kOhm Digital Pot, 256 Taps, I2C","metaDescription":"AD5274BCPZ-20-RL7 20kOhm digital rheostat, 256 taps, I2C, ±1% tolerance, 5ppm/°C tempco, -40°C to +125°C, 10-LFCSP-WD. Active production, ROHS3. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Taper":"Linear","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Selectable Address","Interface":"I2C","Tolerance":"±1%","Memory Type":"Non-Volatile","Configuration":"Rheostat","Mounting Type":"Surface Mount","Number of Taps":"256","Package / Case":"10-VFDFN Exposed Pad, CSP","lifecycle_stage":"eol_hot","Voltage - Supply":"2.7V ~ 5.5V, ±2.5V ~ 2.75V","Resistance (Ohms)":"20k","Number of Circuits":"1","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"10-LFCSP-WD (3x3)","Temperature Coefficient (Typ)":"5ppm/°C","Resistance - Wiper (Ohms) (Typ)":"35"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.56","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.56000","currency":"USD"},{"qty":10,"price":"$3.19700","currency":"USD"},{"qty":25,"price":"$3.02240","currency":"USD"},{"qty":100,"price":"$2.61940","currency":"USD"},{"qty":250,"price":"$2.48512","currency":"USD"},{"qty":500,"price":"$2.22988","currency":"USD"},{"qty":1500,"price":"$1.88062","currency":"USD"},{"qty":3000,"price":"$1.78659","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between AD5274BCPZ-20-RL7 and AD5274BRMZ-20?","answer":"Both parts share the same 20 kOhm rheostat, 256 taps, I2C interface, and ±1% tolerance. The difference is the package: the BCPZ variant is a 10-lead LFCSP-WD (3x3 mm) with an exposed thermal pad, while the BRMZ variant is an MSOP-10 without an exposed pad. The pinouts differ, so they are not drop-in replacements — a board layout change is required to switch between them."},{"question":"How do I get pricing and availability for AD5274BCPZ-20-RL7?","answer":"Pricing and current stock levels are confirmed at quote time. Submit an RFQ through this listing with your target quantity and lead-time requirement; availability is verified against authorized and independent distribution channels before quoting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/AD5274BCPZ-20-RL7","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/AD5274BCPZ-20-RL7 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}