NXP Semiconductors AFIC901N-350MHZ

Overview

AFIC901N-350MHZ from NXP Semiconductors (formerly Freescale) is a two-stage LDMOS RF power amplifier IC designed for broadband operation from 1.8 to 1000 MHz. It delivers 30.4 dBm output power, 27.4 dB power gain, and 61.5% drain efficiency at 350–520 MHz under 7.5 Vdc bias, serving as a rugged driver stage in VHF/UHF communications transmitters.

For engineers reviewing the AFIC901N-350MHZ datasheet, AFIC901N-350MHZ pinout, AFIC901N-350MHZ application, or AFIC901N-350MHZ equivalent, this page provides verified specifications, validated pin functions, confirmed 350–520 MHz UHF reference circuit performance, and real-world ruggedness data including >25:1 load VSWR tolerance at 520 MHz with no degradation.

Technical Context

The AFIC901N-350MHZ integrates two unmatched LDMOS transistor stages in a single 4 mm × 4 mm QFN package, enabling flexible external matching across 136–174 MHz, 350–520 MHz, and 760–870 MHz bands. Its interstage and output ports are fully unmatched, allowing designers to optimize impedance transformation per band.

It operates at 7.5 Vdc with quiescent currents of IDQ1 = 10 mA and IDQ2 = 30 mA in UHF broadband mode, supporting CW and modulated signals. Integrated ESD protection meets JESD22-A114 Class 1A (250 V HBM), JESD22-A115 Class A (MM), and JESD22-C101 Class II (200 V CDM).

Key Specifications

Pinout & Package

AFIC901N-350MHZ is housed in a 24-pin, 4 mm × 4 mm plastic QFN package with exposed source paddle (thermal pad) on the underside. The package complies with IPC/JEDEC J-STD-020 Moisture Sensitivity Level 3 (peak reflow 260°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF6VP11KHR5 and RFM8200, the AFIC901N-350MHZ uniquely balances 30.4 dBm output, 7.5 V operation, unmatched interstage access, and proven 350–520 MHz UHF ruggedness - making it optimal for mid-power mobile radio driver implementations where layout reuse and thermal efficiency are critical.

Availability

AFIC901N-350MHZ is available at Aetrix Electronics and suitable for mobile radio infrastructure, handheld transceiver development, and industrial RF signal generation requiring stable component supply and long-term production continuity.

Supply support for AFIC901N-350MHZ 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 focused on secure connectivity solutions for automotive, industrial, and communication markets, with deep heritage in RF power through its acquisition of Freescale.

The AFIC901N-350MHZ belongs to the AIRFAST® RF LDMOS wideband integrated power amplifier product line, engineered specifically for flexible, high-efficiency driver and output stages in VHF/UHF mobile and industrial radio systems.

FAQ

What is the recommended gate bias voltage for AFIC901N-350MHZ in UHF broadband operation?

The AFIC901N-350MHZ requires separate DC bias on Gate A (Stage 1) and Gate B (Stage 2). For 350–520 MHz operation, typical settings are VG1 ≈ 3.0 V and VG2 ≈ 2.5 V, yielding IDQ1 = 10 mA and IDQ2 = 30 mA. These values are validated in Freescale's UHF reference circuit (Table 10) and ensure optimal gain and efficiency without exceeding maximum ratings.

Does AFIC901N-350MHZ support 50 Ω input and output without external matching?

No - AFIC901N-350MHZ features unmatched input, interstage, and output ports. External matching networks are mandatory for 50 Ω system integration. Freescale provides complete component values and layout for 350–520 MHz in Table 12 and Figure 8, confirming that direct 50 Ω connection results in severe gain and efficiency loss.

What is the maximum safe operating drain voltage for AFIC901N-350MHZ?

The absolute maximum drain-source voltage (VDSS) for AFIC901N-350MHZ is +30 Vdc. However, the device is characterized and qualified for 7.5 Vdc operation in all published UHF broadband and narrowband test circuits. Operating above 7.5 Vdc voids guaranteed performance and may compromise reliability, especially under mismatched load conditions.

Can AFIC901N-350MHZ be used outside the 350–520 MHz band specified in its suffix?

Yes - the "-350MHZ" suffix denotes its primary validated UHF band, but the AFIC901N-350MHZ is fully characterized from 1.8 to 1000 MHz. Freescale provides separate reference circuits and performance data for 136–174 MHz (VHF) and 760–870 MHz (UHF), confirming operational flexibility across three distinct bands using the same die and package.

How is thermal management implemented for AFIC901N-350MHZ in continuous operation?

AFIC901N-350MHZ uses an exposed source paddle (thermal pad) on the underside of its 4 mm × 4 mm QFN package. Effective thermal management requires soldering this pad to a minimum 2.6 mm × 2.6 mm copper area with ≥6 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) connecting to inner/ground planes. This achieves the rated RθJC of 9.4 °C/W for Stage 2 under 30 dBm CW conditions.