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NXP Semiconductors CGD944C,112
- Part No.:
- CGD944C,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Video Amps and Modules
- Package:
- SOT-115J
- Datasheet:
-
CGD944C,112.pdf
- Description:
- IC AMP CATV SOT115J
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
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Product details
Overview
CGD944C,112 from NXP Semiconductors is a hybrid RF power doubler amplifier module using GaAs HFET dies in a SOT115J package, operating at 24 V DC supply, delivering 25 dB typical gain at 870 MHz with 450 mA total current draw and <5.0 dB noise figure across 50–870 MHz - deployed in CATV distribution amplifiers for 40–870 MHz signal boosting.
For engineers reviewing the CGD944C,112 datasheet, CGD944C,112 pinout, CGD944C,112 application, or CGD944C,112 equivalent, key selection criteria include its 25 dB gain flatness (±0.5 dB), −66 dBc CSO/CTB distortion performance at 98 PAL channels, input/output return loss ≥18 dB up to 870 MHz, rugged gold-metallized construction, and SOT115J flanged package thermal management for high-reliability headend and node amplifiers.
Technical Context
The CGD944C,112 implements a two-stage GaAs HFET-based power doubler architecture optimized for broadband CATV linearity, with DC-coupled stages and common-source topology enabling stable 24 V operation. Its design targets minimal intermodulation distortion under multi-channel NTSC/PAL loading while maintaining consistent gain slope (≤2 dB) from 40 MHz to 870 MHz.
Thermal performance is managed via an aluminum flange (SOT115J) with vertical and horizontal mounting holes, supporting baseplate temperatures up to +100 °C. Input and output matching networks are integrated to achieve ≥18 dB return loss across the full 40–870 MHz band without external tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Power Gain | 25 dB typical at 870 MHz - enables single-stage amplification of weak upstream/downstream CATV signals without cascaded stages |
| Noise Figure | 3.5–5.0 dB from 50–870 MHz - preserves signal-to-noise ratio in low-level RF distribution paths |
| Composite Distortion | −66 dBc CTB / −67 dBc CSO at 98 flat PAL channels - meets stringent DOCSIS and ETSI spectral purity requirements |
| Return Loss | ≥18 dB input/output from 640–870 MHz - ensures stable impedance match into 75 Ω coaxial plant infrastructure |
| Supply Current | 450 mA at 24 V DC - defines thermal load and heatsink sizing for continuous-duty headend deployment |
| Bandwidth | DC–870 MHz - supports full legacy NTSC/PAL and modern QAM-256 channel plans in one module |
| Slope Flatness | ≤2 dB peak-to-valley (40–870 MHz) - eliminates need for external tilt compensation in trunk amplifiers |
Pinout & Package
The CGD944C,112 is housed in a rectangular single-ended SOT115J package with aluminum flange, vertical/horizontal mounting holes, and 7 gold-plated in-line leads - designed for direct bolt-down thermal coupling to heat sinks in CATV node and hub amplifiers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RF Input | 50 Ω matched input port accepting CATV downstream signals from 40–870 MHz |
| 2, 3 | Common Ground | Dedicated RF ground terminals tied to flange for low-inductance grounding and EMI suppression |
| 5 | +VB Supply | 24 V DC power input - requires local 10 µF/100 nF decoupling per datasheet layout guidelines |
| 7, 8 | Common Ground | Secondary ground path for output stage stability and thermal dissipation |
| 9 | RF Output | 50 Ω matched output driving coaxial trunk lines with 25 dB gain and −66 dBc distortion |
Key Features
| Feature | Design Value |
|---|---|
| GaAs HFET die technology | Enables high gain and low noise at UHF frequencies without Si LDMOS trade-offs in efficiency or linearity |
| Gold metallization | Ensures long-term bond-wire reliability and corrosion resistance in humid outdoor amplifier enclosures |
| Rugged mechanical construction | Aluminum flange with dual-axis mounting holes withstands vibration and thermal cycling in pole-mounted nodes |
| Integrated input/output matching | Eliminates external tuning components - reduces BOM count and assembly cost in high-volume CATV OEM designs |
| ESD-sensitive handling | Requires ANSI/ESD S20.20-compliant handling during PCB assembly to prevent gate oxide damage |
Applications
| CATV Trunk Amplifier | CATV Line Extender |
|---|---|
Use Scenario: Boosting downstream RF signals over 1–3 km coaxial trunk segments in HFC networks. IC Role / Device Role / Timing Role: Primary RF power doubler stage providing 25 dB gain with flat frequency response and low distortion. Use Value: Enables single-module amplification without gain tilt correction, reducing component count and calibration complexity. | Use Scenario: Re-amplifying attenuated signals before distribution to multiple tap points in neighborhood nodes. IC Role / Device Role / Timing Role: Final-stage broadband amplifier delivering 48 dBmV output level to 98 PAL channels. Use Value: Meets ETSI EN 50083-5 linearity specs (−66 dBc CSO/CTB) without external linearization circuitry. |
| CATV Headend Distribution | DOCSIS Upstream Amplifier |
Use Scenario: Splitting and amplifying multiple QAM-256 downstream channels before feeding optical transmitters. IC Role / Device Role / Timing Role: High-isolation, low-noise gain block preserving MER > 38 dB across 40–870 MHz. Use Value: Maintains signal integrity for 256-QAM and OFDM-A profiles with <0.5 dB gain flatness. | Use Scenario: Amplifying upstream return-path signals (5–85 MHz) in full-duplex DOCSIS 3.1/4.0 systems. IC Role / Device Role / Timing Role: Low-noise, high-linearity pre-driver for upstream transmit chains. Use Value: Achieves −68 dBc CTB at 79+53 NTSC channels, meeting DOCSIS 3.1 upstream spectral mask requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power doubler amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CGD945C,112 | Same SOT115J package, but rated for 1 GHz bandwidth and higher 500 mA supply current | Targeted for next-gen DOCSIS 4.0 extended-spectrum (up to 1.2 GHz) deployments | Select CGD945C,112 only when system bandwidth exceeds 870 MHz; otherwise CGD944C,112 offers optimal cost/performance for legacy and current CATV plants |
| QPA9801 | Surface-mount GaN MMIC (QFN-16), 28 V supply, 27 dB gain, −65 dBc CSO at 1 GHz | Designed for compact, high-efficiency active splitters and distributed amplifiers requiring smaller footprint | Choose QPA9801 where board space is constrained and 28 V infrastructure exists; CGD944C,112 remains preferred for bolt-down thermal management in high-power nodes |
Compared with CGD945C,112 and QPA9801, the CGD944C,112 delivers best-in-class distortion performance at 870 MHz within its defined bandwidth, with superior thermal robustness via flanged SOT115J packaging - making it the reference choice for field-proven, maintenance-free CATV trunk and node amplifiers.
Availability
CGD944C,112 is available at Aetrix Electronics and suitable for CATV trunk amplifiers, line extenders, headend distribution systems, and DOCSIS upstream amplifiers requiring stable component supply, long-lifecycle support, and traceable sourcing for broadcast infrastructure programs.
Supply support for CGD944C,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 CGD944C,112 belongs to NXP's CATV RF amplifier product line, engineered specifically for high-linearity, broadband cable infrastructure applications - emphasizing distortion-free signal amplification in 75 Ω coaxial networks from 40 MHz to 870 MHz.
FAQ
What is the maximum supply voltage rating for the CGD944C,112?
The CGD944C,112 has an absolute maximum supply voltage (VB) rating of 30 V DC, though it is specified for reliable operation at 24 V DC per its recommended conditions. Exceeding 30 V risks permanent damage per IEC 60134 limiting values. The CGD944C,112 must be operated within this limit to ensure long-term reliability in CATV node environments.
Does the CGD944C,112 require external input/output matching components?
No, the CGD944C,112 integrates input and output matching networks optimized for 50 Ω (75 Ω system-compatible) operation across 40–870 MHz, eliminating the need for external tuning stubs or capacitors. This integration is confirmed in the Characteristics section of the NXP datasheet, where RLin and RLout exceed 18 dB without external components - a key design advantage of the CGD944C,112.
What is the thermal mounting requirement for the CGD944C,112?
Per the SOT115J package outline and thermal specifications, the CGD944C,112 requires direct mechanical and thermal contact between its aluminum flange and a heatsink using the two vertical 6-32 UNC mounting holes. Maximum mounting base temperature is +100 °C; proper torque and thermal interface material are essential to maintain junction temperature within safe limits during continuous 450 mA operation - a critical implementation detail for the CGD944C,112.
Can the CGD944C,112 be used in DOCSIS 4.0 upstream applications?
The CGD944C,112 is validated for upstream operation up to 85 MHz with −68 dBc CTB at 79+53 NTSC channels, meeting DOCSIS 3.1 requirements. However, DOCSIS 4.0 extends upstream to 204 MHz, beyond the CGD944C,112's specified 870 MHz bandwidth ceiling - so while the CGD944C,112 functions reliably in existing DOCSIS 3.1 upstream paths, newer spectrum demands require wider-band alternatives.
Is the CGD944C,112 RoHS compliant and lead-free?
Yes, the CGD944C,112 is RoHS compliant and lead-free, as confirmed by NXP's official product change notices and compliance documentation dated 2014 onward. The SOT115J package uses lead-free gold-plated leads and conforms to EU Directive 2011/65/EU - ensuring environmental compliance for global CATV equipment manufacturing, including the CGD944C,112.
CGD944C,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- SOT-115J
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Applications:
- CATV
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- -
- Slew Rate:
- -
- Current - Supply:
- 450 mA
- Current - Output / Channel:
- -
- Voltage - Supply, Single/Dual (±):
- -
- Mounting Type:
- Chassis Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT115J
CGD944C,112 FAQ
1.How can I place an order for CGD944C,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for CGD944C,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CGD944C,112 reliable?
The price and inventory of CGD944C,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CGD944C,112 is usually 5 days.
3.What payment methods are accepted for CGD944C,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CGD944C,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CGD944C,112?
CGD944C,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CGD944C,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CGD944C,112?
For technical support, including CGD944C,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CGD944C,112 requirements.
6.How does Aetrix verify that CGD944C,112 is sourced from the original manufacturer or authorized distributors?
All CGD944C,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CGD944C,112 meets industry standards.
7.What is the process for return or replacement of CGD944C,112?
All CGD944C,112 units undergo pre-shipment inspection (PSI). If there is an issue with CGD944C,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CGD944C,112 part is unused and in its original packaging.
Return procedure for CGD944C,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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