NXP Semiconductors A3G18D510-04SR3

Overview

A3G18D510-04SR3 from NXP Semiconductors is a symmetrical Doherty RF power GaN transistor designed for cellular base station power amplifiers operating in the 1805–2200 MHz band. It delivers 56 W average output power at 48 Vdc, achieves 54.3% drain efficiency at 1805 MHz, and maintains –33.8 dBc ACPR at 2170 MHz under W-CDMA signal conditions.

For engineers reviewing the A3G18D510-04SR3 datasheet, A3G18D510-04SR3 pinout, A3G18D510-04SR3 application, or A3G18D510-04SR3 equivalent, key selection criteria include guaranteed Doherty performance across 395 MHz instantaneous bandwidth, ruggedness under 10 dB PAR AWGN stress, and validated thermal resistance of 0.83 °C/W (IR-measured).

Technical Context

The A3G18D510-04SR3 integrates two matched GaN HEMT dies-Carrier and Peaking-in a single NI-780S-4L air-cavity package, enabling true symmetrical Doherty operation without external combining networks. Its internal input matching eliminates need for external broadband input matching networks.

It operates as a depletion-mode device requiring negative gate bias (–5.0 Vdc on peaking side, –3.2 Vdc quiescent on carrier side), with maximum channel temperature rated to 275 °C and case temperature range from –55 to +150 °C. Ruggedness testing confirms no degradation under 228 W modulated output with 400 MHz ISBW at 55 Vdc.

Key Specifications

Pinout & Package

Package: NI-780S-4L, hermetically sealed air-cavity ceramic/metal package with integrated thermal slug and RF-compatible lid. Dimensions: 14.0 × 12.0 × 3.9 mm (L × W × H), flange-mountable with solder reflow attachment per AN1908.

Key Features

Applications

Equivalent & Alternatives

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

Compared with QPD1025 and CGHV1J006D, the A3G18D510-04SR3 uniquely guarantees symmetrical Doherty performance across the full 1805–2200 MHz band at 48 V with 54.3% efficiency and 0.83 °C/W thermal resistance - making it optimal for cost-sensitive, thermally constrained macro base station designs requiring full-band coverage.

Availability

A3G18D510-04SR3 is available at Aetrix Electronics and suitable for cellular infrastructure, macro base station power amplifiers, and remote radio units requiring stable component supply, long-term lifecycle support, and traceable GaN transistor sourcing.

Supply support for A3G18D510-04SR3 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 headquarters in Eindhoven, Netherlands.

The Airfast RF Power product line delivers high-efficiency GaN transistors optimized for cellular infrastructure applications - specifically engineered for macro base stations, massive MIMO active antennas, and energy-efficient remote radio units operating in licensed sub-6 GHz bands.

FAQ

What is the guaranteed frequency range for A3G18D510-04SR3 operation?

The A3G18D510-04SR3 is characterized and performance-guaranteed exclusively for operation between 1805 MHz and 2200 MHz. NXP explicitly states there is no performance guarantee outside this band. Real-world validation includes measured Gps, ηD, ACPR, and output PAR across 1805, 1995, and 2170 MHz points per Table 4 and Figure 1 in the August 2020 datasheet.

Does A3G18D510-04SR3 require external input matching networks?

No, the A3G18D510-04SR3 is internally input-matched per datasheet Note 1 in Table 4. This eliminates the need for external broadband input matching components across its 1805–2200 MHz band, reducing PCB area, insertion loss, and design complexity. Matching is optimized for 50 Ω systems in NXP's production test fixture.

What is the correct biasing sequence for A3G18D510-04SR3 in Doherty configuration?

The official biasing sequence for A3G18D510-04SR3 requires: (1) set both VGSA and VGSB to –5 V; (2) apply nominal VDD (48 V) to both drains; (3) increase VGSA until IDQA = 250 mA; (4) adjust VGSB to target bias (–5.0 Vdc); (5) apply RF input. Reverse order applies for shutdown. This sequence prevents gate overvoltage and ensures stable Doherty mode activation.

How is thermal performance quantified for A3G18D510-04SR3?

Thermal performance of the A3G18D510-04SR3 is specified as R_θJC = 0.83 °C/W (infrared measurement, active die surface-to-case) at 72 °C case temperature and 68 W dissipation (Table 2). Finite element analysis yields R_θCHC = 1.1 °C/W (channel-to-case), used for reliability modeling. Both values are measured per AN1955 methodology.

What ruggedness testing has been performed on A3G18D510-04SR3?

The A3G18D510-04SR3 underwent wideband ruggedness testing using Additive White Gaussian Noise (AWGN) with 10 dB PAR at 1995 MHz. Under 400 MHz ISBW at 55 Vdc, it delivered 228 W avg. modulated output with 8.5 dB input overdrive and showed zero device degradation - confirming suitability for real-world base station load mismatch conditions.