NXP Semiconductors BGY885A,112

Overview

BGY885A from NXP Semiconductors is a hybrid push-pull RF amplifier module designed for CATV distribution systems, operating from 40 MHz to 860 MHz with 18.5 dB typical power gain at 50 MHz and 860 MHz, 225–240 mA DC current draw at 24 V supply, and 75 Ω input/output impedance. It delivers high linearity (CTB ≥ −61 dBc at 859.25 MHz, 49-channel flat), low noise figure (4.5–8 dB across band), and rugged aluminum-flange SOT115J packaging for thermal stability in headend and node applications.

For engineers reviewing the BGY885A datasheet, BGY885A pinout, BGY885A application, or BGY885A equivalent, this page provides verified technical context, pin-level circuit roles, real-world CATV system performance metrics, and validated alternative options for broadband RF amplification where gain flatness (±0.3 dB), return loss (>14 dB up to 860 MHz), and transient tolerance (30 V max) are critical selection criteria.

Technical Context

The BGY885A implements a silicon-based hybrid push-pull architecture optimized for 75 Ω CATV signal distribution, delivering consistent gain across 40–860 MHz while maintaining slope cable equivalent ≤ 2 dB and frequency response flatness within ±0.3 dB. Its design integrates gold metallization and silicon nitride passivation for reliability under continuous RF stress.

It operates at 24 V DC with total current consumption of 225–240 mA, supports RF input voltage up to 65 dBmV, and withstands supply transients to 30 V. Mounting base temperature range is −20 °C to +100 °C, and storage temperature extends to +100 °C - enabling deployment in outdoor node enclosures and indoor headend racks.

Key Specifications

Pinout & Package

Package: SOT115J - rectangular single-ended aluminum flange package with 2 vertical and 2 horizontal 6-32 UNC mounting holes, 7 gold-plated in-line leads, and thermal base for heatsink attachment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAT-03A and QPA3232, the BGY885A uniquely combines aluminum-flange thermal management, silicon nitride passivation for outdoor reliability, and verified −65 dBc CTB at 860 MHz - making it the only option qualified for long-life, high-channel-count, outdoor CATV node deployments requiring zero derating at +85 °C baseplate temperature.

Availability

BGY885A is available at Aetrix Electronics and suitable for CATV headend amplification, HFC node output stages, coaxial trunk repeaters, and DOCSIS 3.1 upstream combining requiring stable component supply, long-lifecycle continuity, and traceable sourcing for broadcast infrastructure programs.

Supply support for BGY885A 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 secure connectivity solutions for automotive, industrial, and communications markets.

The BGY885A belongs to NXP's legacy CATV amplifier product line, engineered specifically for high-reliability, high-linearity RF signal distribution in broadband cable infrastructure - emphasizing thermal robustness, 75 Ω impedance integrity, and distortion performance compliant with DIN 45004B measurement standards.

FAQ

What is the maximum RF input voltage the BGY885A can handle?

The BGY885A has an absolute maximum RF input voltage rating of 65 dBmV, as defined in its limiting values table. This corresponds to approximately 1.78 V RMS into a 75 Ω load. Exceeding this level risks permanent damage to the internal hybrid transistor structure, especially under sustained high-power conditions or with strong adjacent-channel interference.

Does the BGY885A require external biasing or DC blocking components?

No, the BGY885A is a fully self-biased hybrid module with integrated DC feed and internal matching. RF input (Pin 1) and output (Pin 9) are AC-coupled internally, so external DC blocking capacitors are not required unless interfacing with sources or loads that impose DC voltage on the signal path. External bias tees or active bias circuits are unnecessary.

Can the BGY885A operate reliably at elevated ambient temperatures?

Yes - the BGY885A is rated for mounting base temperature (Tmb) from −20 °C to +100 °C. Its aluminum flange and rugged construction enable stable operation at +85 °C baseplate in outdoor nodes without derating, provided thermal interface material and heatsink design meet NXP's recommended 0.5 °C/W thermal resistance from flange to ambient.

Is the BGY885A pin-compatible with earlier revisions like BGY885 or BGY885B?

No - the BGY885A is not pin-compatible with prior variants. While all share the SOT115J outline, the BGY885A uses a 7-pin configuration (Pins 1,2,3,5,7,8,9 active), whereas legacy BGY885 variants used different pin assignments and internal topologies. PCB redesign is required for replacement; no drop-in upgrade path exists.

What is the significance of the 'push-pull' designation in the BGY885A datasheet?

The push-pull architecture in the BGY885A uses two complementary amplifier stages driven 180° out-of-phase to cancel even-order harmonics and improve linearity. This directly enables its measured CSO ≤ −67 dBc and CTB ≤ −65 dBc performance - critical for minimizing distortion in dense QAM channel stacks used in modern DOCSIS 3.1 deployments.

How does the BGY885A's noise figure vary across its operating bandwidth?

The BGY885A's noise figure increases with frequency: 4.5 dB typ. at 50 MHz, ≤5.5 dB up to 600 MHz, and 6–8 dB at 750–860 MHz. This progressive rise is inherent to broadband hybrid amplifiers and must be accounted for in cascade analysis - particularly in multi-stage headend designs where first-stage NF dominates overall system CNR.