NXP Semiconductors A3G26D055NT4

Overview

A3G26D055NT4 from NXP Semiconductors is an 8 W symmetrical Doherty RF power GaN amplifier designed for cellular base station transmitters operating across 100–2690 MHz. It delivers 18.2 dB power gain, 53.5% drain efficiency, and –28.2 dBc ACPR at 2595 MHz under W-CDMA modulation, optimized for massive MIMO active antenna systems in 5G infrastructure.

For engineers reviewing the A3G26D055NT4 datasheet, A3G26D055NT4 pinout, A3G26D055NT4 application, or A3G26D055NT4 equivalent, key selection criteria include broadband Doherty linearity (≤0.8 dB gain flatness over 160 MHz), rugged 55 Vdc operation, thermal resistance of 3.7 °C/W (IR), and compatibility with analog/digital linearization in high-PAR signal environments.

Technical Context

This GaN-on-SiC Doherty amplifier integrates separate carrier and peaking paths with independent gate biasing (VGSA/VGSB), enabling precise control of load modulation and optimal broadband impedance matching. Its symmetrical architecture supports wide instantaneous bandwidth without external harmonic tuning.

The device operates in depletion-mode GaN HEMT technology, requiring negative gate voltage sequencing (–5 V initial bias) before drain voltage ramp-up. It is internally matched to 50 Ω and characterized on NXP's reference circuit with soldered mounting for thermal and RF performance validation.

Key Specifications

Pinout & Package

Package: DFN 7 × 6.5 mm, thermally enhanced plastic package with exposed drain paddle for direct PCB thermal coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with QPA9807 and AFGA30025, the A3G26D055NT4 uniquely balances 100–2690 MHz coverage, 8 W output, and 3.7 °C/W thermal resistance - making it optimal for cost-sensitive, thermally constrained 5G active antennas needing full sub-3 GHz support without frequency band segmentation.

Availability

A3G26D055NT4 is available at Aetrix Electronics and suitable for 5G massive MIMO active antenna units, macro base station transmitters, and private network base stations requiring stable component supply, long-term lifecycle assurance, and traceable GaN sourcing.

Supply support for A3G26D055NT4 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and communications markets.

The Airfast RF Power product line delivers GaN-based amplifiers engineered specifically for cellular infrastructure - emphasizing broadband linearity, thermal resilience, and seamless integration into active antenna systems for 4G LTE and 5G NR deployments.

FAQ

What is the recommended gate bias sequence for A3G26D055NT4 during power-up?

The correct biasing sequence for A3G26D055NT4 requires first setting both VGSA and VGSB to –5 V, then applying 48 Vdc to VDSA and VDSB, followed by increasing VGSA to achieve IDQA = 40 mA, then adjusting VGSB to its target value. This prevents gate overvoltage and ensures stable Doherty operation. The A3G26D055NT4 datasheet specifies this exact sequence in Section "Correct biasing sequence for GaN depletion mode amplifiers in a Doherty configuration".

Does A3G26D055NT4 support operation below 100 MHz?

No, A3G26D055NT4 is characterized and performance-guaranteed only for 100–2690 MHz. The datasheet explicitly states there is no guarantee of performance outside this band. Operation below 100 MHz may result in degraded gain, efficiency, or stability, and is not validated by NXP. Designers must verify all parameters independently if considering sub-100 MHz use of A3G26D055NT4.

What is the maximum channel temperature rating for A3G26D055NT4?

The maximum channel temperature (TCH) for A3G26D055NT4 is 225°C, as specified in Table 5 (Limiting values). This rating is used for reliability modeling and MTTF estimation. For safe continuous operation, the case temperature (TC) must remain within –55°C to +150°C, and thermal design must ensure channel temperature stays below 225°C under worst-case conditions. This limit applies to the A3G26D055NT4 die itself, not the package surface.

Is A3G26D055NT4 pin-compatible with earlier revisions like A3G26D055N?

Yes, A3G26D055NT4 uses the same DFN 7 × 6.5 mm package and identical pin configuration as A3G26D055N. The "T4" suffix denotes tape-and-reel packaging (2,500 units, 16 mm tape width, 13-inch reel) and does not indicate any electrical or mechanical change. All pin functions, thermal pad layout, and solder mask guidelines remain unchanged per Figures 3–8 in the A3G26D055NT4 datasheet.

What ESD protection level does A3G26D055NT4 provide?

A3G26D055NT4 provides Human Body Model (HBM) Class 1B (≥500 V, <1000 V) and Charge Device Model (CDM) Class C3 (≥500 V, <1000 V) ESD protection per JS-001-2017 and JS-002-2014 standards, as documented in Table 8. This level is appropriate for controlled manufacturing environments but requires standard ESD handling procedures during PCB assembly. The A3G26D055NT4 specification does not support direct handling without grounding or automated pick-and-place with ionized air.