{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"AD8403ARZ100-REEL","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"AD8403ARZ100-REEL","canonicalUrl":"https://icboms.com/analog-devices/AD8403ARZ100-REEL","factsUrl":"https://icboms.com/api/mcp/products/AD8403ARZ100-REEL","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices AD8403ARZ100-REEL, Quad Digital Potentiometer, 100kΩ, 256 Taps, SPI Interface, Volatile, Linear Taper, 24-SOIC Wide, Tape & Reel.","salesMarkdown":"## Quad 100kΩ digital pot — SPI-programmable analog trim in one package The AD8403ARZ100-REEL is a quad-channel digital potentiometer from Analog Devices, packing four independent 100 kΩ resistor strings with 256 wiper tap positions each, controlled over a shared SPI bus. Each channel replaces a mechanical trimmer in volume control, programmable gain amplifier offset calibration, or sensor bias adjustment — the SPI interface keeps the wiper setting immune to the contact noise and wear that plague mechanical pots on a vibrating production line. ## 256 taps per channel — the resolution and the trade-off 256 taps across a 100 kΩ end-to-end resistance gives a step size of roughly 390 Ω per tap (100 kΩ / 256). The wiper resistance is 200 Ω typical, which adds a fixed offset at the zero-scale end — the effective minimum resistance between wiper and B terminal is 200 Ω, not zero. The 500 ppm/°C temperature coefficient means the absolute resistance drifts about 50 Ω/°C. For an audio level-control application the drift is inaudible, but for a precision voltage divider feeding a 12-bit ADC the tempco should be budgeted into the system error stack. Tolerance is ±30 % on the end-to-end resistance — the absolute value varies part-to-part, but the ratiometric accuracy between taps is much tighter because the internal resistor-string matching is laser-trimmed. This is typical for digital pots used as voltage dividers rather than variable resistors. ## Volatile memory — the boot-time initialization requirement The wiper positions are volatile — on power-up the AD8403 resets to the mid-scale position (tap 128), and the host MCU must write the desired wiper codes over SPI before the analog path is enabled. The cascade pin (pin 3) allows daisy-chaining multiple AD8403 devices on a single SPI bus — the serial data output of the first device feeds the SDI of the next, so a multi-channel system with 8, 12, or 16 pots uses only three MCU pins (CS, CLK, SDI). Because the memory is volatile, a brown-out or glitch on the supply rail resets the wipers to mid-scale — the system design should include a power-good monitor that forces a re-initialization sequence after any supply interruption. ## Package and layout — 24-SOIC wide-body footprint Housed in a 24-SOIC wide-body package (7.50 mm body width, 1.27 mm lead pitch), the AD8403ARZ100-REEL uses the standard SOIC-24W footprint — the 1.27 mm pitch routes easily on a 2-layer board without blind vias. No exposed thermal pad — the die heat dissipates through the leadframe and copper traces. For a digital pot drawing microamps of supply current, thermal management is not a concern, but the wide-body package gives better clearance for high-voltage signal routing on adjacent layers. Supplied on tape and reel (2,500 pieces per reel) for automated pick-and-place assembly; cut-tape quantities are also available for prototype runs. ## Active lifecycle — no EOL watch required No stock-holding claim — each RFQ is quoted fresh.","metaTitle":"AD8403ARZ100-REEL Digital Potentiometer, 100kΩ, 4-Ch","metaDescription":"AD8403ARZ100-REEL quad 100kΩ digital pot, 256 taps, SPI, -40°C to +125°C. Active production, ROHS3.","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":"Cascade Pin","Interface":"SPI","Tolerance":"±30%","Memory Type":"Volatile","Configuration":"Potentiometer","Mounting Type":"Surface Mount","Number of Taps":"256","Package / Case":"24-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.7V ~ 5.5V","Resistance (Ohms)":"100k","Number of Circuits":"4","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"24-SOIC","Temperature Coefficient (Typ)":"500ppm/°C","Resistance - Wiper (Ohms) (Typ)":"200"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.29","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.29000","currency":"USD"},{"qty":10,"price":"$9.29800","currency":"USD"},{"qty":25,"price":"$8.86600","currency":"USD"},{"qty":100,"price":"$7.69810","currency":"USD"},{"qty":250,"price":"$7.35216","currency":"USD"},{"qty":500,"price":"$6.70344","currency":"USD"},{"qty":1000,"price":"$6.12000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Will AD8403ARZ100-REEL drop into a board that was specified around AD8403ARZ10-REEL without a layout change?","answer":"The AD8403ARZ10-REEL is the 10 kΩ variant in the same AD8403 family, same 24-SOIC wide-body package, same pinout. The two parts are footprint-compatible — the only difference is the end-to-end resistance value. If the board was designed for the 10 kΩ version, the 100 kΩ version will physically fit, but the wiper step size and the voltage-divider ratio will change by a factor of 10."},{"question":"What compliance documentation does Analog Devices provide for AD8403ARZ100-REEL?","answer":"The part is ROHS3 compliant per the manufacturer declaration. No UL, IEC, or AEC-Q automotive qualification is listed in the available documentation for this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/AD8403ARZ100-REEL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/AD8403ARZ100-REEL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}