NXP Semiconductors AFSC5G26E39-EVB

Overview

AFSC5G26E39-EVB from NXP Semiconductors is an evaluation board for the AFSC5G26E39 Airfast fully integrated Doherty power amplifier module, designed to accelerate RF front-end development for 2.5–2.7 GHz wireless infrastructure. It supports 8 W average LTE output power at 27 Vdc, delivers 41.8% PAE and –28.0 dBc ACPR at 2600 MHz, and enables rapid validation of analog/digital linearization in massive MIMO and outdoor small cell base stations.

For engineers reviewing the AFSC5G26E39-EVB datasheet, AFSC5G26E39-EVB pinout, AFSC5G26E39-EVB application, or AFSC5G26E39-EVB equivalent, this board provides a production-representative reference circuit with documented component layout (Rogers RO4350B PCB), calibrated thermal tracking resistors, and full DC bias sequencing support for carrier/peaking stages - critical for verifying gain flatness (±0.5 dB), ruggedness under 10 dB PAR noise, and quiescent current stability across –40°C to +105°C.

Technical Context

The AFSC5G26E39-EVB implements NXP's reference design for the AFSC5G26E39 Doherty module, featuring dual-stage carrier and peaking amplifiers with independent gate and drain supplies (VGC1/VGC2/VGP1/VGP2 and VDC1/VDC2/VDP1/VDP2). It incorporates 2.2 kΩ thermal-tracking gate feed resistors per stage and 30 Ω ferrite beads on all DC supply lines to suppress switching noise and ensure stable bias under modulated LTE signals.

This board validates wideband ruggedness up to 400 MHz instantaneous signal bandwidth at 27 Vdc with 3 dB input overdrive, maintains <0.045 dB/°C gain variation over temperature, and supports precise P3dB characterization (47.1 dBm typical at 2600 MHz) using its matched 50 Ω RFin/RFout interfaces and calibrated test points for VGG(Q) and IDQ measurements.

Key Specifications

Availability

AFSC5G26E39-EVB is available at Aetrix Electronics and suitable for wireless infrastructure prototyping, LTE base station RF front-end validation, and digital pre-distortion (DPD) algorithm development requiring stable component supply and production-matched reference design fidelity.

Supply support for AFSC5G26E39-EVB 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 and wireless infrastructure.

The AFSC5G26E39-EVB belongs to NXP's Airfast evaluation platform family, engineered to de-risk RF power amplifier integration by delivering production-validated layouts, thermal-aware bias networks, and full documentation for LTE TDD/FDD systems in massive MIMO and remote radio head applications.

FAQ

What is the primary function of the AFSC5G26E39-EVB evaluation board?

The AFSC5G26E39-EVB evaluation board is a production-representative reference design for the AFSC5G26E39 Doherty power amplifier module. It enables engineers to validate RF performance, thermal behavior, and linearization compatibility in real-world LTE infrastructure scenarios - including gain flatness, ACPR, PAE, and ruggedness under 10 dB PAR noise - without custom PCB development. The AFSC5G26E39-EVB uses the exact same component values and layout as NXP's qualification reference circuit.

Does the AFSC5G26E39-EVB support both TDD and FDD LTE operation?

Yes, the AFSC5G26E39-EVB supports both TDD and FDD LTE operation across 2496–2690 MHz, as confirmed by NXP's characterization of the underlying AFSC5G26E39 module in standard LTE test conditions (20 MHz bandwidth, 8 dB PAR). The board's matched 50 Ω input/output interfaces, calibrated bias sequencing, and thermal tracking resistors ensure consistent performance regardless of duplexing scheme.

What PCB material and stack-up are used on the AFSC5G26E39-EVB?

The AFSC5G26E39-EVB uses Rogers RO4350B dielectric material (εr = 3.66, 0.020″ thickness) for controlled impedance routing and thermal reliability. This high-frequency laminate ensures stable 50 Ω matching at RF ports, minimizes loss in DC bias lines, and supports the module's case temperature limit of 125°C during continuous operation - directly reflecting NXP's production reference design requirements.

How does the AFSC5G26E39-EVB implement thermal stability for quiescent current?

The AFSC5G26E39-EVB implements thermal stability using 2.2 kΩ chip resistors (ERJ-1GNJ222C) in the gate feed network for both carrier and peaking stages, per NXP AN1977 and AN1987 guidelines. This design achieves ≤1.2% quiescent current drift for Stage 1 and ≤8.6% for Stage 2 over –40°C to +85°C - enabling robust DPD convergence and long-term linearity retention in uncontrolled outdoor environments where the AFSC5G26E39-EVB is typically deployed.

Can the AFSC5G26E39-EVB be used for wideband noise ruggedness testing?

Yes, the AFSC5G26E39-EVB supports wideband ruggedness validation up to 400 MHz instantaneous bandwidth at 27 Vdc with 3 dB input overdrive, as specified in Table 10 of the AFSC5G26E39 datasheet. Its reference circuit implementation - including ferrite beads (BLM15PD300SN1), decoupling capacitors (0.1 μF to 10 μF), and optimized grounding - ensures no device degradation under Additive White Gaussian Noise (AWGN) stress, making it suitable for verifying reliability in real-world interference-prone deployments.