NXP Semiconductors CGD1044HI,112

Overview

CGD1044HI from NXP Semiconductors is a GaAs-based hybrid amplifier module designed for CATV line amplification, delivering 24.4 dB typical power gain across 40–1003 MHz at 24 V DC supply, with 440–460 mA total current draw and integrated ring wave surge protection in SOT115J package.

For engineers reviewing the CGD1044HI datasheet, CGD1044HI pinout, CGD1044HI application, or CGD1044HI equivalent, this device is selected for high-linearity, low-noise RF amplification in broadband cable distribution systems requiring stable gain flatness, ESD robustness (2000 V HBM), and compliance with RoHS Directive 2002/95/EC.

Technical Context

The CGD1044HI employs heterojunction FET (HFET) GaAs dies in a thermally optimized, unconditionally stable architecture. It operates over 40–1003 MHz with 75 Ω input/output impedance, supporting both NTSC and digital channel stacks up to 1003 MHz under −6 dB offset conditions.

Gain compensation over temperature maintains performance stability across mounting base temperatures from −20 °C to +100 °C. Its design integrates ring wave surge protection and achieves <1 dB flatness (40–1003 MHz) with >16 dB output return loss up to 1003 MHz.

Key Specifications

Pinout & Package

SOT115J package: rectangular single-ended aluminum flange with 2 vertical and 2 horizontal 6-32 UNC mounting holes; 7 gold-plated in-line leads; thermally optimized for PCB-mounted heat sinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CGD1044HI, CGD1045HI offers higher gain at increased current and thermal load, while CGD1043HI trades 1.9 dB gain for lower power consumption and improved efficiency-enabling differentiated node-level optimization without PCB redesign.

Availability

CGD1044HI is available at Aetrix Electronics and suitable for CATV trunk amplification, HFC node deployment, and two-way return-path boosting requiring stable component supply, long-term lifecycle support, and traceable sourcing for broadcast infrastructure programs.

Supply support for CGD1044HI 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 CGD1044HI belongs to NXP's CATV RF power amplifier product line, engineered specifically for broadband cable infrastructure with emphasis on linearity, thermal resilience, and integrated surge protection in outdoor-deployable modules.

FAQ

What is the maximum supply voltage rating for the CGD1044HI?

The CGD1044HI has an absolute maximum supply voltage (VB) of 30 V DC, as specified in Table 4 of the NXP datasheet. Operation at the rated 24 V DC ensures optimal gain, linearity, and thermal performance; exceeding 30 V risks permanent damage. The CGD1044HI must be protected against transient overvoltage events using appropriate clamping circuits if deployed in unregulated power environments.

Does the CGD1044HI require external biasing components?

No, the CGD1044HI is a fully self-biased hybrid amplifier module-no external resistors, capacitors, or inductors are needed for DC biasing. Its internal HFET GaAs dies are pre-configured for 24 V DC operation, and the +VB pin (Pin 5) accepts regulated 24 V directly. However, proper RF decoupling (e.g., 100 nF ceramic + 10 µF tantalum) near Pin 5 is mandatory to ensure unconditional stability across 40–1003 MHz.

Is the CGD1044HI pin-compatible with other devices in the CGD104xHI family?

Yes, the CGD1044HI shares identical SOT115J pinout, mechanical footprint, and terminal functions with CGD1043HI and CGD1045HI-including Pin 1 (input), Pins 2/3/7/8 (common ground), Pin 5 (+VB), and Pin 9 (output). This allows direct substitution within the same PCB layout, though gain, current, and thermal characteristics differ and must be validated per application.

What is the meaning of "tilt extrapolated to 13.5 dB at 1003 MHz" in the CGD1044HI datasheet?

This refers to the intentional, linear gain slope (tilt) applied across the 40–1003 MHz band to compensate for coaxial cable attenuation, which increases with frequency. A 13.5 dB tilt means the CGD1044HI delivers ~13.5 dB more gain at 1003 MHz than at 40 MHz-matching typical 750–1000 MHz cable loss profiles. The CGD1044HI achieves this via internal gain compensation circuitry without external equalizers.

Can the CGD1044HI be used in upstream (return-path) applications?

Yes-the CGD1044HI operates from 40 MHz and exhibits strong input return loss (>20 dB) down to 50 MHz, making it suitable for upstream amplification in 5–42 MHz or 5–85 MHz return bands. Its 4.5 dB noise figure at 50 MHz and unconditional stability ensure clean, low-distortion amplification; however, system-level filtering must suppress downstream leakage, as the CGD1044HI is not inherently directional.