Analog Devices (including Linear Technology and Maxim Integrated) primarily manufactures in Ireland and the Philippines. ADI is a dominant supplier of precision analog ICs, data converters, and MEMS sensors. Irish-origin ADI parts face only the 10% Section 122 surcharge.
Analog Devices (ADI) is headquartered in United States, but most components are manufactured in Ireland, United States, Philippines, Malaysia. For US customs purposes, the COO is where the component is manufactured — not where the company is based. Declaring United States as COO when parts ship from Ireland is a customs violation.
Wafer fabrication and assembly
Wafer fabrication
Assembly and test
Assembly and test
| Country | Sec 122 | Sec 301 | Total |
|---|---|---|---|
| Ireland | 10% | — | 10% |
| United States | 10% | — | 10% |
| Philippines | 10% | — | 10% |
| Malaysia | 10% | — | 10% |
* Section 301 rates shown for electronics HTS chapters (8541–8542). Rates vary by product.
| HTS Code | Description |
|---|---|
| 8542.39.0000 | ADC, DAC, op-amps, amplifiers |
| 8542.31.0000 | DSPs and signal processors |
| 9025.19.0000 | MEMS sensors (ADXL accelerometers) |
Analog Devices (ADI) operates a hybrid IDM model with wafer fabrication in the US (Wilmington, MA and Beaverton, OR) and Ireland (Limerick), plus outsourced wafer supply from TSMC for advanced CMOS nodes. The Limerick, Ireland facility is a significant integrated site performing both wafer fabrication (BiCMOS, CMOS) and back-end operations — making Ireland the COO for parts that complete their manufacturing transformation there. The Philippines (Cavite) and Malaysia (Penang) handle back-end assembly and test for the higher-volume portions of the portfolio. Former Linear Technology and Maxim Integrated product lines (acquired in 2017 and 2021 respectively) were largely manufactured in the US, Philippines, and Thailand, and have been progressively integrated into ADI's supply network.
ADI's product lines span multiple HTS categories. High-speed ADCs and DACs (AD9xxx, AD7xxx, LTC2xxx series) classify under HTS 8542.39.0000. DSPs and signal processors classify under 8542.31.0000. MEMS sensors (ADXL accelerometers, ADIS IMUs) classify under HTS 9025.19.0000 or 8542.39.0000 depending on the level of integration. Power management ICs (LTC series, MAX series) classify under 8542.39.0000. Ireland-origin ADI parts: 10% Section 122, no Section 301. Philippines-origin parts: 10%. Malaysia-origin: 10%. US-fabricated ADI parts that complete assembly in the US carry US COO and face zero tariff on domestic sale. China-origin ADI parts (rare): approximately 60%. ADI's primary portfolio faces 10% effective rate for the vast majority of US imports.
ADI dominates the precision data converter market with products like the AD7172 24-bit ADC and the ADAQ8251 signal chain SiP, which face no second-source alternatives at comparable performance. These specialty products are primarily manufactured in Wilmington, MA (US COO, zero tariff) or Ireland (10%). For precision measurement applications where ADI parts are sole-sourced, the 10% duty is a fixed cost component without sourcing flexibility — buyers should model it into landed cost from the design phase. ADI maintains an extended product lifecycle commitment (20+ years for some industrial/medical parts), reducing end-of-life risk but also limiting the availability of lower-tariff alternatives.
The Maxim Integrated acquisition (completed 2021) added a large portfolio of analog and mixed-signal ICs with manufacturing concentrated in Thailand (Bangkok) and the Philippines, plus a US wafer fab in San Jose (now closed) and Dallas (transferred to Global Foundries). MAX series PMICs, fuel gauges, protection ICs, and interface devices are predominantly assembled in Thailand and the Philippines, both at 10% Section 122. Some MAX series parts were assembled in Malaysia (Penang). Former Maxim parts that were assembled in the US (San Jose) have been transitioned to TSMC foundry with offshore back-end, changing their COO. Buyers of Maxim-branded parts should verify current COO documentation as ADI has updated manufacturing flows post-acquisition.
ADI's MEMS inertial sensors (ADXL345 3-axis accelerometer, ADIS16XXX IMU, ADXRS gyroscopes) are produced using a proprietary iMEMS process at the Wilmington, MA fab. Many of these parts carry US COO and face zero tariff as domestic products — a significant advantage for US defense and industrial buyers who are tariff-sensitive. The MEMS packaging step for some ADIS series IMUs occurs in the Philippines. For high-precision inertial navigation and vibration monitoring applications, ADI's US-COO MEMS devices provide both tariff-free access and ITAR/EAR compliance advantages relevant to defense procurement.
Enter any Analog Devices (ADI) part number to get the COO, HTS code, and full duty calculation including MPF and HMF.
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