NXP Semiconductors A5G38H045N-3700

Overview

A5G38H045N-3700 from NXP Semiconductors is an asymmetrical Doherty RF power amplifier based on GaN-on-SiC technology, designed for 5G massive MIMO active antenna systems operating in the 3400–4000 MHz band. It delivers 5.4 W average output power with 15.5 dB power gain and 52.0% drain efficiency at 3700 MHz under 48 Vdc bias, supporting wide instantaneous bandwidth and high VSWR ruggedness.

For engineers reviewing the A5G38H045N-3700 datasheet, A5G38H045N-3700 pinout, A5G38H045N-3700 application, or A5G38H045N-3700 equivalent, this device is selected for cellular base station transmit chains requiring broadband linearity, thermal robustness up to +150°C case temperature, and compatibility with low-complexity digital pre-distortion (DPD) systems.

Technical Context

The A5G38H045N-3700 implements a two-stage GaN Doherty architecture with separate carrier and peaking transistors, biased at VDD = 48 Vdc, IDQA = 35 mA, and VGSB = –4.2 Vdc. Its internal matching enables 50 Ω system operation without external impedance tuning across 3700–3980 MHz.

It supports wideband modulated signals including W-CDMA and OFDM with 9.9 dB PAR, achieving –29.1 dBc ACPR at 3700 MHz and <1.4 dB gain flatness over 280 MHz bandwidth. Thermal design relies on RθJC (IR) = 5.1 °C/W to manage channel temperatures up to 225°C under full load.

Key Specifications

Pinout & Package

Package: DFN 7 mm × 6.5 mm, thermally enhanced plastic package with exposed thermal pad. Designed for surface-mount reflow assembly per AN1907 guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with A5G38H045NT4 (identical functionality, packaging-only variant) and AFGA38H045H (narrower band, lower efficiency), the A5G38H045N-3700 provides verified 3400–4000 MHz performance with highest gain and efficiency in its class-critical for maximizing spectral reuse and minimizing cooling overhead in dense 5G deployments.

Availability

A5G38H045N-3700 is available at Aetrix Electronics and suitable for 5G massive MIMO active antennas, sub-6 GHz macro base stations, and private network infrastructure requiring stable component supply, long-term lifecycle support, and traceable GaN sourcing.

Supply support for A5G38H045N-3700 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 A5G38H045N-3700 belongs to NXP's Airfast RF Power portfolio, engineered specifically for energy-efficient, thermally robust, and digitally linearizable GaN amplifiers targeting 5G base station infrastructure.

FAQ

What is the guaranteed frequency range for A5G38H045N-3700?

The A5G38H045N-3700 is characterized and performance-guaranteed across 3400–4000 MHz, aligning with 3GPP n78 and n79 bands. Operation outside this range is not validated, and no performance specifications apply beyond these limits. All typical data-including gain, efficiency, and ACPR-is measured within this band using NXP's reference circuit.

Does A5G38H045N-3700 require external matching networks?

No, the A5G38H045N-3700 is internally matched to 50 Ω at both RF_IN and RF_OUT ports. This eliminates the need for external input/output matching components, reducing PCB area, BOM cost, and tuning effort. Matching is validated across the full 3400–4000 MHz band per NXP's reference design.

What is the recommended gate bias sequence for A5G38H045N-3700?

The A5G38H045N-3700 requires strict gate bias sequencing due to its depletion-mode GaN process. First set VGSA and VGSB to –5 V, then apply VDDA/VDDB = 48 Vdc, then ramp VGSA to achieve IDQA = 35 mA, then set VGSB to target bias (e.g., –4.2 Vdc). Reverse order during shutdown. Failure to follow this sequence risks device damage.

How does A5G38H045N-3700 handle high VSWR conditions?

The A5G38H045N-3700 is designed to withstand extremely high output VSWR across its operating band, validated per wideband ruggedness testing (Table 12). It sustains 400 MHz instantaneous bandwidth at 12 W avg. output under 55 Vdc without degradation-enabling direct antenna interface in compact, circulator-free designs common in active antenna systems.

What thermal management is required for A5G38H045N-3700?

The A5G38H045N-3700 has RθJC (IR) = 5.1 °C/W and requires solid thermal connection via its exposed paddle to ≥4 cm² of 2 oz copper with ≥9 thermal vias (0.3 mm diameter, 0.8 mm pitch). PCB layout must follow NXP's DFN 7×6.5 guidelines (Figures 5–7) to maintain TC ≤ +150°C under full 5.4 W avg. load at ambient +85°C.