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Qorvo QPC4043TR7
- Part No.:
- QPC4043TR7
- Manufacturer:
- Qorvo
- Category:
- Attenuators
- Package:
- 16-VFLGA Exposed Pad
- Datasheet:
-
QPC4043TR7.pdf
- Description:
- 75-OHM VCA - LOW INSERTION LOSS
- Quantity:
- Payment:
- Shipping:
Inventory:1,300
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Product details
Overview
QPC4043TR7 from Qorvo is a monolithic 75Ω voltage-controlled attenuator (VCA) delivering 29–31 dB attenuation range across 5–3000 MHz, with 1.4 dB typical insertion loss at 1200 MHz, linear-in-dB control slope (17 dB/V), and operation from 3–5.5 V supply. It serves as a precision RF gain-control element in DOCSIS 4.0 node amplifiers and RPHY shelf signal paths.
For engineers reviewing the QPC4043TR7 datasheet, pinout, applications, or equivalent options, key selection criteria include its 3×3 mm LGA package, 75Ω system impedance match without external components, IIP3 > 46 dBm linearity, and dual-slope MODE pin configuration for positive/negative attenuation vs. VC response.
Technical Context
The QPC4043TR7 employs a patented closed-loop architecture that stabilizes attenuation accuracy over temperature (≤1.2 dB variation ≤25 dB attenuation) and frequency. Its internal control block dynamically adjusts RF path impedance to maintain 75Ω match across the full 5–3000 MHz band and entire 0–2.5 V control voltage range.
It supports two attenuation slopes via the MODE pin: logic HIGH enables +17 dB/V positive slope (attenuation increases with VC), while logic LOW enables negative slope. Settling time is 250 µs for 1 dB step transitions within 0.1 dB final value, enabling fast AGC loop response in CATV upstream/downstream channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 5–3000 MHz - fully specified performance across DOCSIS 4.0 and RPHY spectrum. |
| Attenuation Range | 29–31 dB - usable dynamic range for precise upstream power leveling in cable nodes. |
| Insertion Loss | 1.4 dB typ @ 1200 MHz - low baseline loss preserves system noise figure and gain budget. |
| IIP3 | >46 dBm - high linearity prevents distortion in multi-carrier DOCSIS 4.0 environments. |
| Supply Voltage | 3–5.5 V - compatible with standard 3.3 V and 5 V system rails without regulation overhead. |
| Control Slope | 17 dB/V - predictable linear-in-dB response simplifies DAC-based control interface design. |
| Settling Time | 250 µs - meets fast AGC timing requirements for burst-mode upstream transmission. |
Pinout & Package
QPC4043TR7 uses a 16-pin 3×3 mm laminate LGA package with exposed ground paddle. The backside ground plane connection is mandatory for thermal and RF performance; PCB vias under the package are recommended.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–2, 4–9, 11–13 | GND | Ground terminals - not internally connected; must be externally tied to PCB ground plane for RF stability. |
| 3 | RFIN | 75Ω RF input - requires external DC blocking if source is not AC-coupled. |
| 10 | RFOUT | 75Ω RF output - requires external DC blocking if load is not AC-coupled. |
| 14 | VC | Analog control voltage input - 0–2.5 V range sets attenuation level with 17 dB/V slope. |
| 15 | VDD | Positive supply - 3–5.5 V, draws 5 mA typical; decoupling near pin is critical for RF PSRR. |
| 16 | MODE | Digital slope select - HIGH = positive attenuation slope, LOW = negative slope. |
Key Features
| Feature | Design Value |
|---|---|
| Closed-loop attenuation control | Stabilizes attenuation vs. temperature and frequency - ≤1.2 dB drift over −40°C to +105°C at ≤25 dB setting. |
| 75Ω system match | No external matching components required - simplifies layout and reduces BOM count in CATV front-ends. |
| High linearity | IIP3 > 46 dBm at +15 dBm/tone - maintains signal integrity in dense DOCSIS 4.0 multi-tone upstream spectra. |
| Dual-slope configuration | MODE pin selects +17 dB/V or −17 dB/V attenuation vs. VC - enables flexible AGC or manual gain calibration schemes. |
| Low power consumption | 5 mA supply current at 5 V - suitable for thermally constrained RPHY shelf modules with multiple VCAs. |
Applications
| DOCSIS 4.0 Equalizer Circuits | DOCSIS 4.0 Attenuator |
|---|---|
Use Scenario: Dynamic upstream channel equalization in distributed access architecture (DAA) nodes to compensate for cable plant tilt and loss variation. IC Role / Device Role / Timing Role: Precision analog gain-control element in feedback loops of adaptive equalizers, operating continuously across 5–204 MHz upstream band. Use Value: 31 dB attenuation range and 1.4 dB insertion loss preserve SNR margin while enabling fine-grained per-channel correction without added noise or distortion. | Use Scenario: Programmable attenuation stage in DOCSIS 4.0 downstream signal conditioning before power amplification. IC Role / Device Role / Timing Role: Voltage-controlled RF pad placed between driver amplifier and final PA stage to manage output power headroom and prevent compression. Use Value: 75Ω match eliminates reflection-induced ripple; IIP3 > 46 dBm ensures minimal intermodulation in 1.2 GHz downstream multi-carrier signals. |
| Cable Modems | RPHY and RPHY Shelf applications |
Use Scenario: Upstream transmit path gain control in full-duplex cable modems supporting DOCSIS 4.0's extended upstream spectrum (5–204 MHz). IC Role / Device Role / Timing Role: Primary attenuation element in automatic transmit power control (ATPC) loop, responding to CMTS commands via DAC-driven VC pin. Use Value: 250 µs settling time meets DOCSIS 4.0 burst-mode timing; 3–5.5 V supply compatibility simplifies integration with existing modem power domains. | Use Scenario: Remote PHY shelf line cards requiring stable, wideband RF attenuation for digital pre-distortion (DPD) calibration and channel masking. IC Role / Device Role / Timing Role: High-linearity, temperature-stable attenuator used in DPD feedback paths and test signal injection points. Use Value: Closed-loop architecture ensures ≤1.2 dB attenuation drift over −40°C to +105°C ambient - critical for uncooled outdoor RPHY deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-controlled attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| QPC4045TR7 | Same 3×3 mm LGA package, but 50Ω impedance and 40 dB attenuation range; higher 2.0 dB insertion loss @ 1200 MHz. | Designed for 50Ω wireless infrastructure (5G FR1), not 75Ω CATV systems. | Select only when migrating to 50Ω base station architectures - not drop-in for DOCSIS/RPHY. |
| ADL5240ACPZ-R7 | 50Ω, 31 dB range, 0.9 dB IL @ 1000 MHz, but requires external matching for 75Ω use and lacks MODE pin for slope selection. | Optimized for 50Ω test equipment and microwave links; no native 75Ω support or dual-slope capability. | Use only with impedance transformation circuitry; adds complexity and degrades linearity vs. QPC4043TR7's integrated 75Ω solution. |
Compared with QPC4043TR7, QPC4045TR7 targets 50Ω systems and offers wider range but higher loss, while ADL5240ACPZ-R7 demands external matching and lacks slope configurability - making QPC4043TR7 uniquely optimized for 75Ω DOCSIS 4.0 and RPHY signal chains.
Availability
QPC4043TR7 is available at Aetrix Electronics and suitable for DOCSIS 4.0 node designs, RPHY shelf deployments, and cable modem RF front-ends requiring stable component supply, consistent 75Ω impedance match, and high linearity over temperature.
Supply support for QPC4043TR7 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
Qorvo is a U.S.-based semiconductor company specializing in RF solutions for infrastructure, mobile, and defense markets, with leadership in GaAs and SOI process technologies.
The QPC4043TR7 belongs to Qorvo's CATV/DOCSIS RF front-end product line, engineered specifically for high-linearity, wideband gain control in next-generation cable access networks.
FAQ
What is the maximum RF input power rating for QPC4043TR7?
The absolute maximum RF input power for QPC4043TR7 is +20 dBm. Under recommended operating conditions, it handles up to +15 dBm RF input power continuously, with input P1dB specified at +30 dBm - indicating robust compression headroom essential for DOCSIS 4.0 upstream burst signals. Derating applies above +85°C ambient.
Does QPC4043TR7 require external matching components for 75Ω operation?
No, QPC4043TR7 is internally matched to 75Ω across its full 5–3000 MHz frequency range and entire 29–31 dB attenuation range. This eliminates the need for external baluns, transformers, or discrete matching networks - reducing PCB area, BOM cost, and design risk in CATV amplifier and node designs.
How does the MODE pin affect QPC4043TR7 attenuation behavior?
The MODE pin on QPC4043TR7 selects attenuation slope polarity: logic HIGH enables +17 dB/V positive slope (attenuation increases with VC), while logic LOW enables −17 dB/V negative slope. This dual-mode capability allows flexible integration into both forward AGC and reverse calibration architectures without changing hardware.
What is the thermal resistance (θJA) of QPC4043TR7, and how does it impact thermal design?
QPC4043TR7 has a thermal resistance of 26°C/W. With 5 mA supply current at 5 V (25 mW dissipation), junction temperature rise is ~0.65°C above ambient under ideal PCB grounding. To maintain reliability at +105°C max ambient, ensure ≥4 thermal vias under the exposed paddle and connect to a solid internal ground plane.
Is QPC4043TR7 RoHS compliant and lead-free?
Yes, QPC4043TR7 is fully RoHS compliant per 2011/65/EU and 2015/863/EU directives. It is lead-free, halogen-free (Cl/Br), antimony-free, TBBP-A free, PFOS free, and SVHC free. Contact plating uses ENEPIG, and it supports both lead-free (260°C peak) and SnPb (245°C peak) reflow profiles.
QPC4043TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Qorvo
- Package/Case:
- 16-VFLGA Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Attenuation Value:
- 31dB
- Frequency Range:
- 3 GHz ~ 5 GHz
- Power (Watts):
- -
- Impedance:
- 75 Ohms
- Grade:
- -
- Qualification:
- -
QPC4043TR7 FAQ
1.How can I place an order for QPC4043TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for QPC4043TR7 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 QPC4043TR7 reliable?
The price and inventory of QPC4043TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QPC4043TR7 is usually 5 days.
3.What payment methods are accepted for QPC4043TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QPC4043TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QPC4043TR7?
QPC4043TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QPC4043TR7 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 QPC4043TR7?
For technical support, including QPC4043TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QPC4043TR7 requirements.
6.How does Aetrix verify that QPC4043TR7 is sourced from the original manufacturer or authorized distributors?
All QPC4043TR7 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 QPC4043TR7 meets industry standards.
7.What is the process for return or replacement of QPC4043TR7?
All QPC4043TR7 units undergo pre-shipment inspection (PSI). If there is an issue with QPC4043TR7, 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 QPC4043TR7 part is unused and in its original packaging.
Return procedure for QPC4043TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
QPC4043TR7 Tags
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