ART2K0FE-201104

The ART2K0FE-201104 evaluation board serves as a reference design for the ART2K0FE RF power transistor, a laterally diffused metal-oxide-semiconductor (LDMOS) device from Ampleon. This board enables engineers to characterize gain, efficiency, and linearity in amplifier development for applications such as 2.5 GHz to 2.7 GHz base stations. As a passive assembly of the bare transistor mounted on a tailored PCB with pre-tuned input and output matching networks, it presents distinct procurement risks — particularly mislabeled or refurbished boards that do not match the original tuning. Counterfeit boards may use substandard laminates, incorrect decoupling capacitors, or alternative transistor bond wires that shift the intended impedance match. Procurement professionals must verify three layers: physical authenticity, electrical performance at the datasheet-referenced bias point, and packaging integrity.

Visual and Marking Inspection: Laser Etch vs. Ink and YYWW Lot Decoding

Begin with macro-photography of the board surface under 10x magnification. Authentic Ampleon evaluation boards use a laser-etched part number on the PCB edge, not ink stamps. Ink markings can be chemically removed or smudged — a common tactic on refurbished units. The RF Evaluation and Development Kits, Boards from Ampleon typically carry a four-digit date code (YYWW) laser-engraved near the mounting hole. For example, code 2425 indicates the 25th week of 2024. Any board with a date code older than five years from the current date should be flagged — passive components (especially DC-blocking capacitors) degrade over time at elevated storage temperatures. Check the transistor marking: the ART2K0FE die should display the Ampleon logo (stylized "A" in a diamond) and the full part number without hyphen variants. Counterfeiters often use generic LDMOS dies with mismatched die attach materials. Reject any board where the transistor marking is scraped, re-stamped, or presented as "ART2K0F" or "ART2K0FE-2011."

Parameter Measurement Methods: Instruments and Pass/Fail Criteria

Because the ART2K0FE-201104 is an evaluation board (not a standalone component), the critical measured parameters are small-signal S-parameters and large-signal output power at 2.6 GHz under class-AB bias. Use a calibrated vector network analyzer (VNA) with a 40 dB dynamic range at 2.6 GHz ±100 MHz. At the gate supply terminal, set VGS to the recommended quiescent current (IDQ) value — consult the ART2K0FE datasheet for the exact bias point. For pass/fail criteria: the S21 magnitude at 2.6 GHz should lie within ±1.5 dB of the datasheet typical curve measured on a known-good board. If S11 shows a resonance notch shifted by more than 50 MHz from 2.6 GHz, the input matching network is likely altered. For large-signal testing: apply a continuous wave (CW) input at 2.6 GHz at +3 dBm and measure the output on a spectrum analyzer. The board must deliver at least 90% of the typical output power stated in the datasheet for a 50-ohm system. Any board dropping below 85% indicates a degraded die, damaged bond wires, or mis-tuned matching stubs.

X-Ray and Decap Inspection for High-Value Applications

For procurement into telecom infrastructure or medical RF exciters (where board failure triggers system downtime), X-ray inspection is mandatory. Use a microfocus X-ray system with 20x – 100x magnification. Examine the die attach void ratio underneath the LDMOS transistor — voids exceeding 5% of the die area correlate with thermal runaway under high-duty-cycle pulsed operation. Compare the bond wire pattern to a reference image from the Ampleon product brief. Counterfeit boards sometimes substitute aluminum wedge bonds for the original gold ball bonds, leading to additional 0.5–1.0 dB insertion loss at 2.6 GHz. In extreme cases, request decapsulation (chemical opening of the plastic package) for die inspection. Genuine ART2K0FE dies show the Ampleon through-silicon via (TSV) structure clearly visible under scanning electron microscopy (SEM) at 500× magnification. If decap is not feasible, X-ray is the minimum non-destructive alternative.

Packaging and Certificate of Authenticity (COA) Cross-Check

Ampleon evaluation boards ship in antistatic bags with a tamper-evident seal. The bag label must list the complete part number, quantity (quantity = 1 board), and the orderable package ID. Cross-reference the serial number printed on the bag with the COA, which should include a holographic Ampleon security sticker. Reject any board where the COA is missing, printed on plain paper, or lacks the lot-level trace code. For thermal protection: verify that the board includes an on-board temperature sensor at the heatsink interface — this is present on all Ampleon reference designs since 2020. The sensor part number (typically a small SOT-23 device) should match the bill of materials (BOM) available from Ampleon upon NDA request. Procurement should request a copy of the Ampleon factory test report that lists the measured output power and efficiency at 28 V drain supply. Any test report with handwritten corrections or missing calibration dates is a red flag.

AQL Sampling Plan with Accept/Reject Criteria

For lots of 10 boards or fewer, inspect 100% of units. For lots between 11 and 100 boards, apply an AQL of 1.0% with normal inspection (sampling size = 20 boards per MIL-STD-1916). Accept the lot if zero critical defects (miss-marking, die damage, wrong transistor) and one or fewer major defects (shifted S11 beyond 50 MHz, output power below 85% of typical) are found. Reject any lot with two or more major defects or any die-level fracture. For receiving inspection, document the measured S21 and IDQ in the supplier-issued certificate of conformance. The following table consolidates the verification checks that the supplier must confirm before shipment.

The two most critical parameters from the verification checklist are the S21 deviation and the die attach void ratio. S21 deviation beyond ±1.5 dB at the target frequency indicates that the board's matching network does not replicate the Ampleon reference design — this could be due to a counterfeit transistor with different parasitic capacitance or a PCB trace length variation. In a production amplifier design, such a board would yield incorrect load-pull data, wasting engineering hours. The die attach void ratio directly affects thermal impedance: a 10% void area raises the junction temperature by approximately 15°C under continuous 30 W dissipation, accelerating electromigration in the drain metal. Both parameters are non-negotiable for qualification into safety-critical RF subsystems.

Procurement workflow summary: verify the board's laser marking and date code during incoming inspection. Measure small-signal S21 on a VNA; reject any board outside ±1.5 dB of the reference. Run large-signal output power test at the rated bias point — output power below 90% of typical fails. For high-reliability orders (telecom, medical), request X-ray imaging to confirm die attach void ratio below 5%. For lots above 10 units, apply AQL = 1.0% with MIL-STD-1916. Cross-check the COA hologram with the bag serial number. By integrating these steps into the requisition checklist, procurement teams can confidently source genuine ART2K0FE-201104 boards that match the RF designer's expectations.