NXP Semiconductors CGD942C,112

Overview

CGD942C,112 from NXP Semiconductors is a hybrid RF power doubler amplifier module based on GaAs HFET dies in a SOT115J package, operating at 24 V DC supply, delivering 23 dB typical gain at 870 MHz with 450 mA total current draw and <5.0 dB noise figure - deployed in CATV distribution amplifiers for 40–870 MHz signal boosting.

For engineers reviewing the CGD942C,112 datasheet, CGD942C,112 pinout, CGD942C,112 application, or CGD942C,112 equivalent, key selection criteria include its 23 dB gain flatness across 40–870 MHz, −68 dBc composite triple beat (CTB) performance under 79+53 NTSC channel loading, input/output return loss ≥18 dB up to 870 MHz, and rugged SOT115J flanged metal package rated for mounting base temperatures up to +100 °C.

Technical Context

The CGD942C,112 implements a two-stage GaAs HFET-based power doubler architecture optimized for broadband CATV linearity, with internal biasing configured for fixed 24 V DC operation and no external gate voltage adjustment required. Its design targets minimal intermodulation distortion while maintaining stable gain over temperature and frequency.

It operates within a defined 40–870 MHz bandwidth with flatness ≤0.5 dB (peak-to-valley), supports 48 dBmV output level per channel, and meets stringent RF return loss requirements (>18 dB across full band) to minimize reflections in cascaded amplifier chains used in headend and node applications.

Key Specifications

Pinout & Package

The CGD942C,112 is housed in a rectangular single-ended SOT115J package with an aluminum flange, two vertical 6-32 UNC mounting holes, two extra horizontal mounting holes, and seven gold-plated in-line leads. The flanged metal construction provides direct thermal coupling to heatsinks and mechanical stability in outdoor or high-vibration CATV enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CGD942C,112, CGD943C,112 extends usable bandwidth to 1 GHz at higher power and thermal cost, while MAX2109ETX+ trades flanged thermal performance and CATV-grade distortion for small-footprint integration - making CGD942C,112 the balanced choice for proven 870 MHz reliability and linearity.

Availability

CGD942C,112 is available at Aetrix Electronics and suitable for CATV trunk amplifiers, optical node RF stages, HFC headend line extenders, and bidirectional distribution hubs requiring stable component supply, long-lifecycle support, and traceable sourcing for telecom infrastructure programs.

Supply support for CGD942C,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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and communications markets.

The CGD942C,112 belongs to NXP's CATV RF amplifier product line, engineered specifically for high-linearity, high-reliability broadband amplification in community antenna television infrastructure with emphasis on thermal robustness and DOCSIS-compliant distortion performance.

FAQ

What is the maximum recommended mounting base temperature for CGD942C,112?

The CGD942C,112 is rated for a maximum mounting base temperature (Tmb) of +100 °C, as specified in the Absolute Maximum Ratings table. Operation above this limit risks permanent degradation of GaAs die performance and gold metallization integrity. For reliable long-term use in outdoor cabinets, thermal design must ensure the flange-to-heatsink interface stays below +100 °C under worst-case ambient and power dissipation conditions. The CGD942C,112 datasheet confirms this limit applies across the full 40–870 MHz operating band.

Does CGD942C,112 require external biasing components?

No, the CGD942C,112 integrates internal bias circuitry optimized for fixed 24 V DC operation and does not require external gate voltage adjustment or bias tees. Only a 24 V DC supply applied to pin 5 (+VB), proper RF input/output AC coupling (via external DC-blocking capacitors), and solid RF grounding through pins 2, 3, 7, and 8 are needed. The CGD942C,112 datasheet explicitly states "no external gate voltage adjustment required" in the Technical Context section.

What is the typical composite second-order distortion (CSO) performance of CGD942C,112?

The CGD942C,112 delivers −70 dBc typical composite second-order distortion (CSO) under 79+53 flat NTSC channel conditions at 48 dBmV output level, as documented in Table 5 of the official NXP datasheet. This CSO value is measured across the full 40–870 MHz band and reflects the device's ability to suppress even-order harmonics critical for analog video fidelity. The CGD942C,112 maintains ≥−66 dBc CSO even under worst-case PAL channel loading.

Can CGD942C,112 be used in DOCSIS 3.1 downstream applications?

Yes, the CGD942C,112 supports DOCSIS 3.1 downstream applications because its 40–870 MHz bandwidth fully covers the DOCSIS 3.1 downstream spectrum (up to 780 MHz in most deployments), and its −68 dBc CTB and −70 dBc CSO performance meet or exceed minimum linearity requirements for 4096-QAM modulation. The CGD942C,112 datasheet validates these metrics at 48 dBmV output level, which aligns with DOCSIS 3.1 RF output specifications.

Is CGD942C,112 ESD-sensitive and what handling precautions apply?

Yes, the CGD942C,112 is sensitive to electrostatic discharge (ESD), as stated in Section 7 of the NXP datasheet. Handling must comply with ANSI/ESD S20.20, IEC/TS 61340-5, or JESD625-A standards - including grounded workstations, ESD-safe packaging, wrist straps, and ionized air environments. The CGD942C,112 flanged metal package does not eliminate ESD risk; damage can occur at voltages as low as 100 V, so strict ESD controls are mandatory during PCB assembly and testing.