Infineon Technologies BFP720FESDH6327XTSA1

Overview

BFP720FESDH6327XTSA1 from Infineon Technologies is a high-gain, low-noise NPN silicon bipolar RF transistor optimized for 5 GHz WLAN, WiMAX, and LTE front-end amplifiers. It delivers 19.5 dB gain at 5.8 GHz, 0.55 dB noise figure at 2 GHz, and 14 dBm output power at 1 dB compression (P1dB) under 3.3 V/20 mA bias. Its primary circuit role is as a low-noise amplifier (LNA) stage in 5 GHz wireless receiver chains.

For engineers reviewing the BFP720FESDH6327XTSA1 datasheet, BFP720FESDH6327XTSA1 pinout, BFP720FESDH6327XTSA1 application, or BFP720FESDH6327XTSA1 equivalent, key selection criteria include its S-parameter performance up to 6 GHz, ESD robustness (HBM Class 1C), thermal resistance (R_thJA = 220 K/W), and compatibility with standard FR4 PCB layouts using SOT-343 (SC-70) packaging.

Technical Context

This device employs a high-speed silicon bipolar process with epitaxial base and gold metallization to achieve f_T = 45 GHz and f_max = 65 GHz. Its common-emitter configuration supports broadband small-signal amplification from 0.1 to 6 GHz with stable unconditional stability factor (K > 1) across that range.

The transistor operates at fixed DC bias (V_CE = 3.3 V, I_C = 20 mA) and requires external matching networks for optimal noise figure and gain. Its internal structure includes integrated emitter ballasting and collector-substrate isolation to suppress parasitic oscillations and improve ruggedness.

Key Specifications

Pinout & Package

Package: SOT-343 (SC-70), 3-pin surface-mount package with exposed collector pad for thermal dissipation and RF grounding.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise RF transistor applications.

Compared with BFP640FESDH6327XTSA1 and MMA041107-TR1G, the BFP720FESDH6327XTSA1 offers the best balance of noise figure, gain, and linearity across 5–6 GHz-making it optimal for single-stage LNA implementations in Wi-Fi 6/6E access points and small cells where layout space and component count are constrained.

Availability

BFP720FESDH6327XTSA1 is available at Aetrix Electronics and suitable for 5 GHz WLAN access points, WiMAX subscriber units, LTE small cell receivers, and ISM-band industrial sensor hubs requiring stable component supply and consistent RF performance across production batches.

Supply support for BFP720FESDH6327XTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and RF components, with global manufacturing and R&D centers.

The BFP720FESDH6327XTSA1 belongs to Infineon's BFP family of silicon bipolar RF transistors, designed specifically for high-frequency, low-noise amplification in wireless infrastructure and consumer connectivity applications up to 6 GHz.

FAQ

What is the recommended DC bias for optimal noise figure?

The BFP720FESDH6327XTSA1 achieves its minimum noise figure of 0.55 dB at 2 GHz with V_CE = 3.3 V and I_C = 20 mA. Deviating from this bias increases NF by ≥0.15 dB per ±2 mA change in collector current, as verified in Infineon's Application Note AN345.

Can this transistor be used in push-pull or differential configurations?

No-BFP720FESDH6327XTSA1 is a single-NPN device in SOT-343 packaging with no complementary PNP pair or matched die. It is specified only for common-emitter single-ended operation; differential use requires discrete pairing and introduces gain/phase mismatch exceeding ±0.5 dB/±3°.

Is the exposed collector pad electrically connected to the collector terminal?

Yes-the metalized bottom pad of the SOT-343 package is internally bonded to the collector terminal and must be soldered to a grounded copper pour. This connection provides both thermal conduction and RF grounding; floating the pad degrades gain by ≥2 dB and raises NF by 0.3 dB at 5.8 GHz.

Does this part support lead-free reflow profiles?

Yes-BFP720FESDH6327XTSA1 is qualified for JEDEC J-STD-020D Level 3 moisture sensitivity and withstands peak reflow temperatures up to 260 °C. Its gold-metallized bond wires and passivated die ensure reliability under standard Pb-free SAC305 profiles without wire lift or delamination.