NXP Semiconductors OM7693/BFU730F,598

Overview

BFU730F,598 from NXP Semiconductors is a discrete SiGeC HBT transistor designed for Ku-band low-noise amplifier stages in satellite LNB preamplifier chains. It delivers 11.15 dB gain at 11.75 GHz, 1.2 dB noise figure at 11.75 GHz, and operates at 5 V / 11.5 mA with unconditional stability (K ≥ 1, μ ≥ 1) across 10.7–12.75 GHz. Its primary role is as a cost-optimized replacement for pHemT devices in LNA2 or LNA3 positions.

For engineers reviewing the BFU730F,598 datasheet, BFU730F,598 pinout, BFU730F,598 application, or BFU730F,598 equivalent, this device is evaluated specifically for Ku-band LNB front-end design where gain-noise trade-off, thermal stability (−40 °C to +85 °C), and unconditional RF stability are critical selection criteria.

Technical Context

The BFU730F,598 is fabricated in NXP's SiGeC QuBIC4x BiCMOS process, where carbon doping suppresses boron diffusion to enable steeper base profiles, lower base resistance, reduced noise, and higher f_T. Its intrinsic HBT structure supports high-frequency operation without requiring external stabilization networks beyond bias resistors.

Designed for single-stage Ku-band LNA implementation, it targets 10.7–12.75 GHz operation with input/output matching optimized for maximum gain while maintaining NF ≤ 1.4 dB and RL_in/RL_out ≥ 12 dB. Stability analysis confirms unconditional stability over the full band, and linearity is characterized by IIP3 = 10 dBm and OIP3 = 21.3 dBm at 11.5 GHz.

Key Specifications

Pinout & Package

BFU730F,598 is housed in a 2×2 mm SOT323 (SC-70) plastic surface-mount package with three terminals: emitter, base, and collector. The package supports RF performance up to 13 GHz and is compatible with standard reflow soldering profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BFU730F,598, BFU720F,598 trades Ku-band noise and gain for lower cost, while NE85633 prioritizes gain over noise - making BFU730F,598 the balanced choice for LNA2/LNA3 where both parameters must meet tight LNB specifications.

Availability

BFU730F,598 is available at Aetrix Electronics and suitable for satellite LNB manufacturing, VSAT outdoor unit production, and DBS receiver front-end development requiring stable component supply and traceable sourcing.

Supply support for BFU730F,598 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 high-performance RF, analog, and mixed-signal solutions for automotive, industrial, and communications markets.

The BFU730F,598 belongs to NXP's Ku-band RF transistor product line, engineered specifically for cost-sensitive, high-volume satellite receiver applications where SiGeC HBT performance bridges the gap between silicon and GaAs technologies.

FAQ

What is the primary application context for BFU730F,598?

The BFU730F,598 is engineered for Ku-band low-noise amplifier stages in satellite LNB preamplifier chains, particularly as LNA2 or LNA3 in 2- or 3-stage architectures. Its 1.2 dB NF at 11.75 GHz and unconditional stability make it suitable for replacing more expensive pHemT transistors while maintaining system-level LNB performance within 0.04 dB NF degradation.

Does BFU730F,598 require external stabilization components?

No, BFU730F,598 does not require external stabilization components. ADS simulation and measurement confirm unconditional stability (K ≥ 1 and μ ≥ 1) across 10.7–12.75 GHz. The device achieves this inherently through its SiGeC HBT structure and internal parasitic control, eliminating the need for lossy RC networks that degrade noise and gain.

What is the measured thermal stability of BFU730F,598 gain and noise figure?

Measured data shows BFU730F,598 exhibits ≤1 dB gain variation and ≤0.7 dB NF variation across −40 °C to +85 °C. At −40 °C, gain is 11.25 dB and NF is 1.1 dB; at +85 °C, gain drops to 10.55 dB and NF rises to 1.8 dB - confirming suitability for uncontrolled outdoor LNB environments.

How does BFU730F,598 compare to pHemT transistors in LNB system performance?

In a 3-stage LNB, BFU730F,598 used as LNA3 delivers 0.91 dB overall NF - identical to the pHemT baseline. When used as LNA2, it yields 0.97 dB overall NF, just 0.04 dB higher than pHemT. This minor degradation is acceptable given BFU730F,598's lower cost and compatibility with standard PCB assembly processes.

What package type and footprint does BFU730F,598 use?

BFU730F,598 uses a 2×2 mm SOT323 (SC-70) plastic surface-mount package with emitter-base-collector pinout. This footprint is compatible with automated pick-and-place equipment and standard reflow profiles, and supports RF performance up to 13 GHz with appropriate PCB layout practices on Rogers RO4003 substrate.