{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT1991IDD#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT1991IDDPBF","canonicalUrl":"https://icboms.com/analog-devices/LT1991IDDPBF","factsUrl":"https://icboms.com/api/mcp/products/LT1991IDD%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT1991IDD#PBF, Programmable Gain Amplifier, 1 Circuit, Rail-to-Rail Output, 560 kHz Gain Bandwidth, 110 kHz -3dB Bandwidth, 0.12V/µs Slew Rate, 2.7V to 36V Supply, 25 µV Offset, 130 µA Supply Current, 10-WFDFN Exposed Pad Package, -40°C to 85°C.","salesMarkdown":"## Programmable-gain amplifier for precision sensor front-ends It combines a 560 kHz gain-bandwidth product with a 110 kHz -3 dB bandwidth, a 0.12 V/µs slew rate, and rail-to-rail output swing — characteristics that suit it for conditioning signals from strain gauges, thermocouples, and bridge sensors where the gain needs to be set by external resistors rather than a fixed topology. The 25 µV input offset voltage and 2.5 nA input bias current keep DC errors low enough that many applications can skip a software calibration step. Supply range from 2.7 V to 36 V means the same part can serve a 3.3 V battery-powered data logger or a 24 V industrial transmitter without a rail converter. ## Supply current and output drive — sizing for always-on and loop-powered designs At 130 µA supply current, the LT1991IDD#PBF fits into power budgets where every microamp counts — think 4-20 mA loop-powered transmitters or battery-backed sensor nodes that stay awake continuously. If the load is purely resistive and the signal bandwidth stays under 110 kHz, the 0.12 V/µs slew rate is sufficient to maintain linearity; for faster edges, a wider-bandwidth PGA would be needed. ## Package and thermal — what the 10-DFN exposed pad means for the board The exposed pad is also the ground return for the die substrate — the layout should connect it to the analog ground plane with a low-impedance path, not leave it floating.","metaTitle":"LT1991IDD#PBF Programmable Gain Amplifier, 560 kHz","metaDescription":"LT1991IDD#PBF from Analog Devices is a single-channel programmable gain amplifier with 560 kHz GBP, 110 kHz bandwidth, rail-to-rail output, 25 µV offset, 130","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Package":"Bulk","Slew Rate":"0.12V/µs","Output Type":"Rail-to-Rail","Mounting Type":"Surface Mount","-3db Bandwidth":"110 kHz","Amplifier Type":"Programmable Gain","Package / Case":"10-WFDFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Supply":"130µA","Number of Circuits":"1","Current - Input Bias":"2.5 nA","Operating Temperature":"-40°C ~ 85°C","Gain Bandwidth Product":"560 kHz","Voltage - Input Offset":"25 µV","Supplier Device Package":"10-DFN (3x3)","Current - Output / Channel":"21 mA","Voltage - Supply Span (Max)":"36 V","Voltage - Supply Span (Min)":"2.7 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.55","stockQuantity":0,"priceTiers":[{"qty":85,"price":"$3.55000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4ad8cca34e6b6826eba813e6e71b691d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent part for LT1991IDD#PBF?","answer":"There is no pin-compatible second source listed for the LT1991IDD#PBF. The AD627ARZ-RL is another instrumentation amp with 80 kHz bandwidth and 50 µV offset, but it lacks the programmable-gain topology. For a direct replacement, stick with the LT1991IDD#PBF."},{"question":"What is the gain range of LT1991IDD#PBF?","answer":"The LT1991 is a programmable gain amplifier whose gain is set by external resistors. The datasheet typical configuration supports gains from 1 to 1000, but the exact range depends on the resistor values chosen. The 560 kHz gain-bandwidth product means the usable bandwidth drops proportionally as gain increases — at a gain of 100, expect roughly 5.6 kHz of usable bandwidth."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT1991IDDPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT1991IDDPBF 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}}