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Qorvo QPC4043SR
- Part No.:
- QPC4043SR
- Manufacturer:
- Qorvo
- Category:
- Attenuators
- Package:
- 16-VFLGA Exposed Pad
- Datasheet:
-
QPC4043SR.pdf
- Description:
- 75-OHM VCA - LOW INSERTION LOSS
- Quantity:
- Payment:
- Shipping:
Inventory:4,348
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Product details
Overview
QPC4043SR 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 - deployed in DOCSIS 4.0 equalizer and RPHY node signal conditioning.
For engineers reviewing the QPC4043SR datasheet, pinout, applications, or equivalent options, this page delivers verified RF performance specs, ground-referenced LGA package layout, temperature-stable attenuation response, and DOCSIS 4.0–validated linearity metrics including IIP3 > 46 dBm and P1dB > +30 dBm.
Technical Context
The QPC4043SR implements a closed-loop analog control architecture that maintains consistent attenuation vs. frequency and temperature - achieving ≤1.2 dB variation over –40°C to +105°C at ≤25 dB attenuation. Its 75Ω matched input/output eliminates external matching components across the full 5–3000 MHz band.
Control is implemented via dual-slope configuration: MODE pin selects positive or negative attenuation slope (17 dB/V), while VC pin accepts 0–2.5 V analog voltage for precise dB-linear gain adjustment. Settling time is 250 µs for 1 dB step accuracy within 0.1 dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 5–3000 MHz - fully specified and validated for DOCSIS 4.0 upstream/downstream spectrum. |
| Attenuation Range | 29–31 dB - guaranteed minimum 29 dB over temperature and voltage, enabling robust headroom control. |
| Insertion Loss | 1.4 dB typ. @ 1200 MHz - low path loss preserves system noise figure and dynamic range. |
| IIP3 | >46 dBm @ +15 dBm/tone, 50 MHz spacing - ensures minimal intermodulation distortion in multi-carrier CATV systems. |
| P1dB | >+30 dBm - supports high-power RPHY shelf and node amplifier output stages without compression. |
| Supply Current | 5 mA typ. @ VDD = 5 V - enables low-power biasing in thermally constrained cable infrastructure modules. |
| Control Slope | ±17 dB/V - selectable polarity via MODE pin; enables flexible AGC loop integration in both positive- and negative-slope feedback designs. |
Pinout & Package
QPC4043SR uses a 16-pin 3×3 mm laminate LGA package with exposed ground paddle. All 9 GND pins (Pins 1,2,4–9,11–13) are electrically isolated but require PCB grounding via vias under the package base for optimal RF return path and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,4–9,11–13 | GND | Isolated ground terminals - must be connected to solid ground plane with multiple vias; no internal connection, but critical for RF stability and thermal management. |
| 3 | RFIN | 75Ω RF input - DC-coupled; requires external DC block if source is not grounded. |
| 10 | RFOUT | 75Ω RF output - DC-coupled; requires external DC block if load is not grounded. |
| 14 | VC | Analog control voltage input - 0–2.5 V range sets attenuation level with ±17 dB/V slope. |
| 15 | VDD | Power supply input - operates from 3–5.5 V; decoupling capacitor required per datasheet layout guidelines. |
| 16 | MODE | Digital logic select - HIGH enables positive attenuation slope; LOW enables negative slope. |
Key Features
| Feature | Design Value |
|---|---|
| Closed-loop VCA architecture | Reduces attenuation variation to ≤1.2 dB across –40°C to +105°C and 5–3000 MHz - eliminates manual calibration in field-deployed nodes. |
| 75Ω system match | Zero external matching components required - simplifies PCB layout and improves repeatability in high-volume CATV module production. |
| Linear-in-dB control | 17 dB/V slope with <0.1 dB settling error - enables precise, predictable gain control in analog AGC loops without digital compensation. |
| High linearity | IIP3 > 46 dBm and P1dB > +30 dBm - sustains signal integrity in dense DOCSIS 4.0 multi-carrier environments with up to 1.2 GHz channel bandwidth. |
| Low power consumption | 5 mA supply current at 5 V - reduces thermal load in densely packed RPHY shelf backplanes and fanless amplifiers. |
Applications
| DOCSIS 4.0 Equalizer Circuit | DOCSIS 4.0 Attenuator Stage |
|---|---|
|
Use Scenario: Compensating frequency-dependent loss in coaxial plant return-path segments with dynamic upstream channel loading. IC Role / Device Role / Timing Role: Voltage-controlled RF attenuator providing programmable, temperature-stable gain correction in analog feedforward paths. Use Value: Maintains flat group delay and ≤1.2 dB attenuation drift over temperature - enabling stable upstream SNR without DSP recalibration. |
Use Scenario: Setting precise RF power levels before downstream splitters or upstream combiners in active node architectures. IC Role / Device Role / Timing Role: Programmable attenuation element in automatic level control (ALC) loops for DOCSIS 4.0 full-duplex channels. Use Value: Delivers 29–31 dB range with 250 µs settling - supports fast burst-mode power adjustments during channel bonding transitions. |
| RPHY Shelf Signal Conditioning | CATV Node Amplifier Gain Control |
|
Use Scenario: Managing signal amplitude across distributed R-PHY shelf units where fiber-to-coax conversion introduces variable loss. IC Role / Device Role / Timing Role: High-linearity VCA placed between DAC output and driver amplifier to maintain OIP3 integrity in remote PHY transmitters. Use Value: IIP3 > 46 dBm and P1dB > +30 dBm prevent distortion in multi-tone RPHY waveforms up to 1.8 GHz. |
Use Scenario: Implementing analog gain control in hybrid fiber-coax (HFC) node amplifiers supporting DOCSIS 3.1/4.0 channel aggregation. IC Role / Device Role / Timing Role: Front-end attenuator in cascaded amplifier stages to optimize composite second-order (CSO) and composite triple-beat (CTB) distortion performance. Use Value: 75Ω match and 1.4 dB insertion loss preserve noise figure and minimize cascade degradation in multi-stage node designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-controlled attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| QPC4042SR | Same 3×3 mm LGA package, but 25–30 dB attenuation range and 2.0 dB insertion loss @ 1200 MHz. | Limited to lower-dynamic-range DOCSIS 3.1 nodes; insufficient for full DOCSIS 4.0 upstream headroom requirements. | Select QPC4042SR only when attenuation range ≤30 dB and IIP3 ≥43 dBm suffices - not drop-in compatible due to reduced linearity margin. |
| ADL5240ACPZ-R7 | 50Ω system impedance, 40 dB range, 2.2 dB IL @ 1 GHz, requires external matching for 75Ω CATV use. | Designed for 50Ω test equipment and wireless infrastructure - not pre-matched for 75Ω cable plant. | Choose ADL5240ACPZ-R7 only with full recharacterization and impedance transformation network - adds BOM cost and layout complexity. |
Compared with QPC4043SR, QPC4042SR offers lower cost but sacrifices 1–2 dB of attenuation range and 3 dB of IIP3 margin needed for DOCSIS 4.0 compliance; ADL5240ACPZ-R7 provides wider range but demands redesign for 75Ω impedance matching and lacks temperature-stable closed-loop response.
Availability
QPC4043SR is available at Aetrix Electronics and suitable for DOCSIS 4.0 equalizer circuits, RPHY shelf signal conditioning, and CATV node amplifier gain control requiring stable component supply, long-lifecycle support, and RoHS-compliant 75Ω RF performance.
Supply support for QPC4043SR 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 RF semiconductor company specializing in high-performance RF solutions for infrastructure, defense, and mobile markets - with core expertise in GaAs and SOI process technologies.
The QPC4043SR belongs to Qorvo's broadband CATV/DOCSIS portfolio, engineered specifically for high-linearity, temperature-stable RF attenuation in next-generation cable access networks operating up to 3 GHz.
FAQ
What is the maximum RF input power rating for QPC4043SR?
The absolute maximum RF input power for QPC4043SR is +20 dBm, as specified in the Absolute Maximum Ratings table. Under recommended operating conditions (≤+15 dBm RF input), the device delivers guaranteed linearity performance including IIP3 > 46 dBm and P1dB > +30 dBm - making it suitable for high-power DOCSIS 4.0 node and RPHY shelf applications where signal integrity is critical. Exceeding +20 dBm risks permanent damage.
Does QPC4043SR require external matching components for 75Ω operation?
No, QPC4043SR is internally matched to 75Ω across its full 5–3000 MHz frequency range and entire 29–31 dB attenuation range - eliminating the need for external matching networks, baluns, or transformers. This simplifies PCB layout, improves manufacturing yield, and ensures repeatable performance in DOCSIS 4.0 and RPHY applications without tuning or calibration.
How does the MODE pin affect QPC4043SR attenuation behavior?
The MODE pin on QPC4043SR selects attenuation slope polarity: applying logic HIGH enables positive slope (attenuation increases with VC voltage), while logic LOW enables negative slope (attenuation decreases with VC voltage). Both modes deliver the same 17 dB/V control sensitivity and ≤1.2 dB temperature-induced variation - allowing flexible integration into either forward- or reverse-polarity AGC loops without circuit redesign.
What is the thermal resistance (θJA) of QPC4043SR, and how should it be managed?
QPC4043SR has a thermal resistance of 26°C/W (junction-to-ambient), measured with proper PCB mounting per the recommended pattern - including multiple thermal vias under the exposed ground paddle. To maintain junction temperature ≤+125°C, ensure ≥4 thermal vias (0.3 mm diameter) connecting the paddle to an internal ground plane, and limit continuous power dissipation to ≤300 mW using the 5 mA supply current and 5.5 V max VDD.
Is QPC4043SR compliant with RoHS and lead-free soldering standards?
Yes, QPC4043SR is fully RoHS-compliant per 2011/65/EU and 2015/863/EU directives, and is lead-free, halogen-free, antimony-free, TBBP-A-free, PFOS-free, and SVHC-free. It supports both lead-free reflow (260°C peak) and tin/lead soldering (245°C peak), with ENEPIG contact plating ensuring reliable solder joint formation and long-term interconnect integrity in cable infrastructure deployments.
QPC4043SR 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:
- 5 MHz ~ 3 GHz
- Power (Watts):
- -
- Impedance:
- 75 Ohms
- Grade:
- -
- Qualification:
- -
QPC4043SR FAQ
1.How can I place an order for QPC4043SR through Aetrix?
Please submit a Request for Quotation (RFQ) for QPC4043SR 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 QPC4043SR reliable?
The price and inventory of QPC4043SR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QPC4043SR is usually 5 days.
3.What payment methods are accepted for QPC4043SR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QPC4043SR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for QPC4043SR?
QPC4043SR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your QPC4043SR 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 QPC4043SR?
For technical support, including QPC4043SR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QPC4043SR requirements.
6.How does Aetrix verify that QPC4043SR is sourced from the original manufacturer or authorized distributors?
All QPC4043SR 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 QPC4043SR meets industry standards.
7.What is the process for return or replacement of QPC4043SR?
All QPC4043SR units undergo pre-shipment inspection (PSI). If there is an issue with QPC4043SR, 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 QPC4043SR part is unused and in its original packaging.
Return procedure for QPC4043SR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
QPC4043SR Tags
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