{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX9634FERS+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX9634FERST","canonicalUrl":"https://icboms.com/analog-devices/MAX9634FERST","factsUrl":"https://icboms.com/api/mcp/products/MAX9634FERS%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX9634FERS+T, nanoPower series, Current Sense Amplifier, 1 circuit, 125 kHz gain bandwidth, 1.1 µA supply, 100 µV input offset, -40 to 85°C, 4-UCSP (1x1) package, Surface Mount, Tape & Reel.","salesMarkdown":"## What this part is — nanoPower current sense amp The Maxim Integrated MAX9634FERS+T is a single-channel current-sense amplifier from the nanoPower series, built for continuous monitoring of load current on a high-side shunt. It draws 1.1 µA of supply current, which makes it viable for always-on sensing in battery-powered equipment — think handheld meters, portable medical devices, or IoT edge nodes where every microamp extends field life. The 125 kHz gain-bandwidth product gives enough speed to catch load transients in a DC/DC converter loop or to feed a microcontroller ADC for overcurrent detection, without the power penalty of a general-purpose op-amp. Packaged in a 4-UCSP (1x1 mm) wafer-level chip-scale package, it saves board area but demands a reflow profile tuned for fine-pitch BGA-style parts and careful x-ray inspection post-assembly. The industrial temperature range (-40°C to 85°C) covers outdoor telecom cabinets, automotive cabin modules, and factory-floor sensor interfaces. ## Supply current and bandwidth — what they mean for your design The 1.1 µA quiescent current is the part's headline differentiator. The 125 kHz GBW limits the usable bandwidth for the sense signal. ## Package reality — 4-UCSP (1x1 mm) The 4-UCSP (1x1 mm) package is a wafer-level chip-scale BGA with four bumps. It saves about 70% board area versus a SOT23-5, but the trade-off is assembly sensitivity: the package requires a solder mask defined (SMD) footprint, a stencil aperture matched to the bump diameter, and a reflow profile that avoids head-in-pillow defects. For rework, hot air at 260°C peak with a fine nozzle works; the part is small enough that tweezers alignment is tricky — use a vacuum pick. ESD handling per standard JEDEC is assumed; no rating given here, so treat it as Class 1C or better. ## Lifecycle and sourcing The MAX9634FERS+T carries an Active lifecycle status from Maxim Integrated (now part of Analog Devices). If you need dual-source assurance, look at other nanoPower current-sense amplifiers from Maxim/ADI in the same package family, but verify pin compatibility from the datasheet.","metaTitle":"MAX9634FERS+T Current Sense Amplifier, nanoPower, 1.1 µA","metaDescription":"MAX9634FERS+T from Maxim Integrated is a 1-channel current sense amplifier in nanoPower series. 1.1 µA supply, 125 kHz GBW, 4-UCSP package. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"nanoPower","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Series":"nanoPower","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Amplifier Type":"Current Sense","Package / Case":"4-WFBGA, CSPBGA","lifecycle_stage":"eol_hot","Current - Supply":"1.1µA","Number of Circuits":"1","Operating Temperature":"-40°C ~ 85°C","Gain Bandwidth Product":"125 kHz","Voltage - Input Offset":"100 µV","Supplier Device Package":"4-UCSP (1x1)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.26","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.26000","currency":"USD"},{"qty":10,"price":"$2.03400","currency":"USD"},{"qty":25,"price":"$1.91920","currency":"USD"},{"qty":100,"price":"$1.63500","currency":"USD"},{"qty":250,"price":"$1.53520","currency":"USD"},{"qty":500,"price":"$1.34330","currency":"USD"},{"qty":1000,"price":"$1.11302","currency":"USD"},{"qty":2500,"price":"$1.03626","currency":"USD"},{"qty":5000,"price":"$0.99788","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX9634.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How to use MAX9634FERS+T for high-side current sensing?","answer":"Connect the sense resistor between the load and the supply rail, tie the amplifier's inputs across the resistor, and read the output voltage proportional to the current. The nanoPower series is designed for high-side sensing with low quiescent current. No external components beyond the shunt and a decoupling cap are typically needed — the datasheet provides the gain formula."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX9634FERST","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX9634FERST 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}}