NXP Semiconductors BGD904,112

Overview

BGD904,112 from NXP Semiconductors is a hybrid RF power doubler amplifier module designed for CATV distribution amplifiers and trunk-line repeaters operating in the 40–900 MHz band. It delivers 20 dB small-signal gain at 860 MHz, supports 24 V DC supply, consumes 405–435 mA total current, and achieves −68 dB CTB (110-channel flat) with 49 dBmV output voltage under specified conditions.

For engineers reviewing the BGD904,112 datasheet, BGD904,112 pinout, BGD904,112 application, or BGD904,112 equivalent, this page provides verified specifications, SOT115J package mapping, CATV system integration guidance, distortion performance trade-offs across channel counts, and validated alternative options for broadband cable infrastructure design.

Technical Context

The BGD904,112 implements a silicon-based hybrid amplifier architecture with gold metallization and silicon nitride passivation, enabling rugged operation up to +100 °C mounting base temperature. Its input and output return losses exceed 16 dB across 40–900 MHz, ensuring stable 75 Ω impedance matching in cascaded CATV line-ups.

It operates as a fixed-gain, single-ended RF power doubler - not a variable-gain or digitally controlled device - with no internal bias adjustment circuitry. Performance is characterized at VB = 24 V, ZS = ZL = 75 Ω, and Tmb = 35 °C, with tilt compensation capability supporting both 9 dB (50–550 MHz) and 12.5 dB (50–860 MHz) spectral profiles.

Key Specifications

Pinout & Package

SOT115J package: rectangular single-ended metal flange with 7 gold-plated in-line leads, 2 vertical 6-32 UNC mounting holes, aluminum construction, and thermal pad on underside for direct heatsink attachment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX2109ETJ+ and QPL9057, the BGD904,112 uniquely combines 24 V operation, 75 Ω CATV interface compliance, tilt-compensated flatness, and proven field reliability in outdoor headend and trunk-line roles - making it irreplaceable for legacy and hybrid fiber-coax infrastructure requiring zero-layout redesign.

Availability

BGD904,112 is available at Aetrix Electronics and suitable for CATV headend distribution amplifiers, trunk-line repeaters, and node power doublers requiring stable component supply across extended product lifecycles and environmental extremes.

Supply support for BGD904,112 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 high-performance RF, analog, and mixed-signal solutions for communications infrastructure, automotive, and industrial markets.

The BGD904,112 belongs to NXP's legacy CATV hybrid amplifier family, engineered specifically for broadband cable network equipment requiring high linearity, thermal resilience, and 75 Ω impedance stability in uncontrolled outdoor environments.

FAQ

What is the maximum supply voltage rating for the BGD904,112?

The BGD904,112 has an absolute maximum supply voltage (VB) of 30 V DC, with operational tolerance up to 35 V transients per Note 9 in the datasheet. It is rated for continuous operation at 24 V DC, and exceeding 30 V risks permanent damage to the internal hybrid circuitry. Designers must ensure clamping or regulation if upstream power supplies exhibit overshoot beyond this limit. The BGD904,112 does not include internal overvoltage protection.

Does the BGD904,112 require external bias adjustment or tuning components?

No, the BGD904,112 is a fully self-biased hybrid amplifier module with no external bias adjustment required. All internal transistor bias points are factory-set and stabilized via on-module resistive networks and thermal compensation. No external trimmers, inductors, or capacitors are needed for basic operation - only 24 V DC supply, RF input/output coupling, and proper grounding per the SOT115J mechanical layout. The BGD904,112 is designed for drop-in replacement in legacy CATV amplifier designs.

How does the BGD904,112 perform under tilted frequency response conditions?

The BGD904,112 supports two defined tilt profiles: 9 dB tilt (50–550 MHz) with 3.5 dB offset in the 550–750 MHz range, and 12.5 dB tilt (50–860 MHz). Under these conditions, its CTB remains ≥−63 dB (110-channel) and ≥−59.5 dB (129-channel), as verified in Figures 2 and 5. This tilt capability allows direct integration into legacy cable plant equalization schemes without external slope correction networks. The BGD904,112 achieves this via internal passive network design, not active feedback.

Is the BGD904,112 pin-compatible with the BGD904MI variant?

No, the BGD904,112 and BGD904MI are electrically identical but have reversed RF input and output pin assignments: Pin 1 is input on BGD904,112 and output on BGD904MI; Pin 9 is output on BGD904,112 and input on BGD904MI. Both share identical SOT115J package dimensions, ground pin locations (2,3,7,8), and +VB pin (5). PCB layout must be mirrored for interchangeability - no shared footprint without board revision. The BGD904,112 is not a drop-in replacement for BGD904MI.

What thermal management is required for continuous operation of the BGD904,112?

The BGD904,112 must be mounted directly to a thermally conductive heatsink via its aluminum flange using the two vertical 6-32 UNC mounting holes. With 420 mA typical current draw at 24 V, it dissipates ~10.1 W. To maintain Tmb ≤ +100 °C, thermal resistance from flange to ambient must not exceed 10 °C/W - achievable with a 150 cm² finned heatsink in still air or forced convection. The BGD904,112 includes no internal thermal shutdown and relies entirely on external mechanical thermal path integrity.