NXP Semiconductors A5G35H120NT2

Overview

A5G35H120NT2 from NXP Semiconductors is an asymmetrical Doherty RF power amplifier based on GaN-on-SiC technology, designed for 5G massive MIMO active antenna systems in cellular base stations. It delivers 18 W average RF output power across 3300–3800 MHz, achieves 56.7% drain efficiency at 3500 MHz, and maintains –31.3 dBc ACPR under W-CDMA modulation with 9.9 dB PAR.

For engineers reviewing the A5G35H120NT2 datasheet, A5G35H120NT2 pinout, A5G35H120NT2 application, or A5G35H120NT2 equivalent, this page provides verified performance data, thermal resistance (RθJC = 2.0 °C/W), ruggedness against 55 Vdc/400 MHz ISBW overdrive, gate bias sequencing guidance, and DFN 7×10 mm package implementation details for high-reliability macro base station RF front-end design.

Technical Context

This GaN HEMT-based Doherty amplifier integrates separate carrier and peaking transistors in a monolithic DFN package, enabling broadband operation without external matching networks. Its depletion-mode architecture requires precise gate bias sequencing: VGSA/VGSB must be set to –5 V before applying VDD = 48 Vdc, then adjusted to achieve IDQA = 70 mA (carrier) and target VGSB (peaking).

The device operates with fixed 48 Vdc drain supply and supports wide instantaneous bandwidth via high terminal impedances. It is characterized for linearized operation with next-generation 5G signals, exhibiting <0.27 dB gain flatness over 200 MHz at 18 W avg. output and –15° AM/PM distortion at saturation across 3400–3600 MHz.

Key Specifications

Pinout & Package

Package: DFN 7 mm × 10 mm, thermally enhanced with exposed metal die paddle on bottom side for direct PCB heatsinking. RoHS-compliant, MSL Level 3 (260 °C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with QPA9807, A5G35H120NT2 delivers +3 W output and +14.7 percentage points higher efficiency while supporting full 3300–3800 MHz band coverage and extreme VSWR tolerance; compared with A5G35H140NT2, it offers lower thermal dissipation and simpler biasing for mid-tier 5G macro deployments.

Availability

A5G35H120NT2 is available at Aetrix Electronics and suitable for 5G massive MIMO active antenna units, macro base station remote radio heads, and fixed wireless access customer premises equipment requiring stable component supply, long-term lifecycle support, and traceable GaN sourcing.

Supply support for A5G35H120NT2 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 and LDMOS amplifiers optimized for cellular infrastructure, with A5G35H120NT2 specifically engineered for energy-efficient, high-bandwidth 5G base station RF front ends.

FAQ

What is the recommended gate bias sequence for A5G35H120NT2?

The correct biasing sequence for A5G35H120NT2 is: (1) Set GSA and GSB to –5 V, (2) Apply VDDA and VDDB to +48 Vdc, (3) Increase GSA until IDQA = 70 mA, (4) Adjust GSB to target bias voltage (Vt – 1.5 Vdc), then (5) apply RF input. This prevents gate overvoltage and ensures stable Doherty mode activation. Reversing steps risks permanent damage to the GaN HEMTs.

Does A5G35H120NT2 require external matching components?

No, A5G35H120NT2 is internally matched for 50 Ω operation at both RF_IN and RF_OUT ports across 3300–3800 MHz. The datasheet confirms all typical performance data was measured with the device soldered to NXP's reference circuit without added matching networks. External tuning is unnecessary unless custom harmonic suppression is required.

What thermal interface material is recommended for A5G35H120NT2?

NXP recommends using a high-thermal-conductivity solder paste (e.g., Indium Corporation 50Sn50In) to attach the exposed thermal paddle of A5G35H120NT2 directly to a copper thermal pad on the PCB. AN1907 specifies reflow profiles with peak temperature ≤260 °C and outlines solder mask opening patterns to ensure void-free attachment and optimal RθJC = 2.0 °C/W performance.

Can A5G35H120NT2 operate outside the 3300–3800 MHz band?

No - the datasheet explicitly states performance is guaranteed only within 3300–3800 MHz and "there is no guarantee of performance" outside this band. At 3200 MHz or 3900 MHz, gain drops >2 dB and ACPR degrades beyond 3GPP compliance limits. System-level validation is required for any out-of-band use, and NXP does not characterize or warrant such operation.

What is the maximum safe drain voltage for A5G35H120NT2?

The absolute maximum drain-source voltage (VDSS) for A5G35H120NT2 is 125 Vdc, but the recommended operating condition is strictly VDD = 48 Vdc. Exceeding 48 Vdc risks accelerated degradation and violates the qualified operating envelope defined in Table 6. Transient spikes above 55 Vdc (per limiting values table) may cause irreversible failure even if duration is sub-microsecond.