NXP Semiconductors A3G20S250-01SR3

Overview

A3G20S250-01SR3 from NXP Semiconductors is a 45 W average RF power GaN transistor designed for cellular base station amplifiers operating in the 1800–2200 MHz band, with 18.2 dB typical power gain, 37.0% drain efficiency, and –34.1 dBc adjacent channel power ratio at 2170 MHz under W-CDMA conditions.

For engineers reviewing the A3G20S250-01SR3 datasheet, A3G20S250-01SR3 pinout, A3G20S250-01SR3 application, or A3G20S250-01SR3 equivalent, key selection criteria include guaranteed 45 W avg. output in the 1800–2200 MHz band, GaN depletion-mode biasing sequence compliance, thermal resistance of 1.0 °C/W (IR), and NI-400S-2SA package compatibility for high-power RF PA stages.

Technical Context

This GaN HEMT operates as a depletion-mode RF power amplifier stage optimized for Doherty architectures and digital predistortion (DPD) linearization. It requires precise gate bias sequencing (V_GS = –5 V before V_DS ramp-up) and delivers broadband performance across 1805–2170 MHz with 0.5 dB gain flatness at 45 W avg. output.

Thermal design relies on its 1.0 °C/W infrared-measured junction-to-case thermal resistance (R_θJC) and maximum channel temperature rating of 275 °C. ESD protection meets HBM Class 1C and CDM Class C3 per JS-001/JS-002 standards.

Key Specifications

Pinout & Package

The A3G20S250-01SR3 is housed in the NI-400S-2SA air-cavity ceramic package, featuring solderable baseplate and flange-mount thermal interface for high-power RF applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power transistor applications.

Compared with QPD1025 and AFGA30025, the A3G20S250-01SR3 provides the optimal balance of 45 W avg. output, 37.0% efficiency, and proven thermal performance in the NI-400S-2SA package-making it the preferred choice for mid-power macro/micro base station PAs requiring field-proven reliability and DPD compatibility.

Availability

A3G20S250-01SR3 is available at Aetrix Electronics and suitable for cellular base station amplifiers, active antenna systems, and private LTE/5G network infrastructure requiring stable component supply, long-lifecycle availability, and traceable GaN transistor sourcing.

Supply support for A3G20S250-01SR3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communications markets, with deep expertise in RF power technologies.

The A3G20S250-01SR3 belongs to NXP's AIRFAST® GaN RF power transistor product line, engineered specifically for high-efficiency, high-linearity cellular infrastructure amplifiers operating in licensed sub-3 GHz spectrum.

FAQ

What is the correct biasing sequence for the A3G20S250-01SR3?

The A3G20S250-01SR3 requires strict depletion-mode GaN bias sequencing: first set V_GS to –5 V, then apply V_DS to 48 V, adjust V_GS to achieve 250 mA I_DQ, and finally apply RF input. Reversing this risks catastrophic gate failure. The A3G20S250-01SR3 datasheet (Rev. 0, Sept. 2018) specifies this sequence in the "Correct Biasing Sequence" note on page 3.

Does the A3G20S250-01SR3 require external input matching?

No-the A3G20S250-01SR3 is internally input-matched per NXP's characterization in a 50 Ω system, eliminating the need for discrete input matching networks in standard base station PA designs. This simplifies layout and improves repeatability across production units. The A3G20S250-01SR3 specification confirms internal input matching in Table 4 footnotes and Figure 2 test circuit documentation.

What thermal interface requirements apply to the A3G20S250-01SR3?

The A3G20S250-01SR3 uses the NI-400S-2SA package with a solderable copper-tungsten baseplate requiring high-thermal-conductivity interface material (e.g., metal-filled thermal paste or solder). Its 1.0 °C/W R_θJC (IR) demands heatsink thermal resistance ≤ 0.5 °C/W for safe operation at full 45 W avg. output. The A3G20S250-01SR3 thermal data is validated per AN1955 methodology.

Can the A3G20S250-01SR3 be used outside the 1800–2200 MHz band?

No-NXP explicitly states performance is guaranteed only within 1800–2200 MHz. Operation outside this band voids specifications: gain, efficiency, and ACPR are not characterized or warranted. The A3G20S250-01SR3 datasheet warns "no guarantee of performance" beyond this range, and design validation must be performed independently if extended use is attempted.

What ESD protection level does the A3G20S250-01SR3 provide?

The A3G20S250-01SR3 meets Human Body Model (HBM) Class 1C (≥1 kV) and Charge Device Model (CDM) Class C3 (≥1 kV) per JS-001-2017 and JS-002-2014 standards. These ratings reflect built-in gate protection structures validated during qualification. Handling requires standard GaN ESD protocols-grounded workstations, ionized air, and wrist straps-as the A3G20S250-01SR3 remains sensitive despite these protections.