NXP Semiconductors OM7690/BFU730F,598

Overview

OM7690/BFU730F,598 from NXP Semiconductors is an evaluation board featuring the BFU730F SiGe:C HBT transistor configured as a single-stage 2.3–2.7 GHz low-noise amplifier (LNA) with 21 dB gain, 0.8 dB noise figure, and unconditional stability from 10 MHz to 20 GHz. It integrates input/output matching networks, SMA RF connectors, and bias circuitry for immediate RF performance validation in WiMAX, WLAN, LTE, and ISM band systems.

For engineers reviewing the OM7690/BFU730F,598 datasheet, OM7690/BFU730F,598 pinout, OM7690/BFU730F,598 application, or OM7690/BFU730F,598 equivalent, this board enables rapid characterization of BFU730F-based LNA designs without external matching components - supporting gain, noise figure, linearity (IP3i = +1.5 dBm), return loss, and power settling time (Ton = 430 µs) measurements at 2.5 GHz.

Technical Context

The OM7690/BFU730F,598 implements a grounded-emitter amplifier topology using the BFU730F discrete HBT fabricated in NXP's 110 GHz f_T SiGe:C BiCMOS process. Its design targets high linearity and ultra-low noise across 2.3–2.7 GHz via optimized input/output matching networks and biasing with 11 passive components.

Stability is ensured across 10 MHz–20 GHz (K ≥ 1, μ ≥ 1), while RF performance is referenced directly to SMA connectors - accounting for ~0.1 dB connector/PCB loss. The board uses FR4 substrate (ε_r = 4.6–4.9) with controlled-impedance microstrip lines and direct emitter grounding via vias for optimal RF behavior.

Key Specifications

Availability

OM7690/BFU730F,598 is available at Aetrix Electronics and suitable for RF front-end prototyping, 5G sub-6 GHz receiver validation, and wireless infrastructure development requiring stable component supply and traceable evaluation hardware.

Supply support for OM7690/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 specializing in secure connectivity solutions for automotive, industrial, IoT, and mobile applications - with leadership in RF, analog, and mixed-signal technologies.

The OM7690/BFU730F,598 belongs to NXP's RF evaluation platform family, designed to accelerate adoption of high-performance SiGe:C transistors in broadband wireless receiver chains where low noise, high linearity, and wideband stability are critical.

FAQ

What is the primary function of the OM7690/BFU730F,598 evaluation board?

The OM7690/BFU730F,598 is a fully assembled 2.3–2.7 GHz low-noise amplifier evaluation board built around the BFU730F SiGe:C HBT transistor. It provides immediate RF performance measurement capability - including gain, noise figure, linearity, and return loss - without requiring additional matching circuitry or layout effort. The OM7690/BFU730F,598 serves as a reference design and test vehicle for integrating the BFU730F into wireless receiver front ends.

Does the OM7690/BFU730F,598 include the BFU730F transistor?

Yes, the OM7690/BFU730F,598 evaluation board includes one BFU730F discrete HBT mounted in a SOT343F package. This transistor is the core active device in the single-stage grounded-emitter LNA configuration. All supporting passives - including matching inductors, decoupling capacitors, and bias resistors - are pre-installed per the AN11006 application note schematic.

What RF performance metrics are verified on the OM7690/BFU730F,598 at 2.5 GHz?

At 25 °C and 2.5 GHz, the OM7690/BFU730F,598 delivers 21 dB small-signal gain, 0.8 dB noise figure, 7.9 dB input return loss, 17.5 dB output return loss, –16.5 dBm input 1-dB compression point, and +1.5 dBm input third-order intercept point. These values are measured directly at the SMA connectors and include ~0.1 dB loss from connectors and PCB traces.

Is the OM7690/BFU730F,598 unconditionally stable across its operating band?

Yes, the OM7690/BFU730F,598 is unconditionally stable from 10 MHz to 20 GHz, confirmed by K ≥ 1 and μ ≥ 1 across the full frequency range. This stability is achieved through intentional resistor placement (e.g., R3 = 10 Ω) and careful layout practices - including direct emitter grounding and controlled-impedance RF routing - as documented in AN11006.

Can the OM7690/BFU730F,598 be used for fast-switching applications such as TDD systems?

Yes, the OM7690/BFU730F,598 supports fast switching with Ton = 430 µs and Toff = 24 ns under standard configuration. For sub-microsecond turn-on (e.g., <1 µs in WLAN TDD), capacitor C1 and C3 can be modified to 27 pF - though this degrades IP3 by 5–10 dB. The OM7690/BFU730F,598 thus offers configurable trade-offs between speed and linearity.