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Analog Devices Inc. ADA4304-4ACPZ-EB
- Part No.:
- ADA4304-4ACPZ-EB
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
ADA4304-4ACPZ-EB.pdf
- Description:
- BOARD EVAL FOR ADA4304-4ACP
- Quantity:
- Payment:
- Shipping:
Inventory:3,700
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Product details
Overview
ADA4304-4ACPZ-EB from Analog Devices is a 1:4 single-ended active RF splitter IC designed for CATV downstream signal distribution in multi-tuner systems. It delivers nominal 2.9 dB gain per output, 54 MHz to 865 MHz bandwidth with ≤1 dB flatness, 4.6 dB noise figure at 550 MHz, and −72 dBc CTB distortion at 865 MHz. It operates from a 5 V supply and targets residential gateways and digital cable-ready TVs.
For engineers reviewing the ADA4304-4ACPZ-EB datasheet, ADA4304-4ACPZ-EB pinout, ADA4304-4ACPZ-EB application, or ADA4304-4ACPZ-EB equivalent, key selection criteria include 75 Ω impedance matching, output-to-output isolation ≥25 dB across 54–1000 MHz, thermal performance on 4-layer PCBs (θJA = 98°C/W), and SiGe process-based distortion performance in broadband RF splitting.
Technical Context
The ADA4304-4ACPZ-EB integrates a low-noise SiGe buffer amplifier followed by a resistive power divider, enabling lossless 1:4 signal splitting without external passive components. Its architecture supports simultaneous delivery to four independent RF paths-e.g., main tuner, PIP tuner, OOB tuner, and cable modem-while maintaining 75 Ω input/output termination.
It requires external biasing via a 1 µH RF choke connected between 5 V and the IL pin (Pin 14), and mandates AC coupling with 0.01 µF capacitors on all ports. Performance is specified only under matched 75 Ω conditions; mismatch degrades CSO/CTB and return loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB) | 2400 MHz - supports full CATV spectrum plus headroom for future extensions. |
| Frequency Range (1 dB flatness) | 54 MHz to 865 MHz - covers entire downstream DOCSIS and DVB-C band without gain compensation. |
| Gain (f = 100 MHz) | 2.9 dB typical - compensates for 6 dB theoretical loss of 1:4 split, delivering net +2.9 dB per output vs. input. |
| Noise Figure | 4.6 dB at 550 MHz - enables high SNR in multi-stage receiver front-ends with minimal degradation. |
| Composite Triple Beat (CTB) | −72 dBc at 865 MHz (135 channels, 15 dBmV/channel) - meets stringent cable system linearity requirements. |
| Output-to-Output Isolation | ≥25 dB from 54 MHz to 865 MHz - prevents crosstalk between tuners sharing common signal source. |
| Input/Output Impedance | 75 Ω - eliminates need for external matching networks in standard CATV infrastructure. |
| Supply Voltage | 4.75 V to 5.25 V - compatible with standard 5 V LDO rails; quiescent current 92–105 mA. |
Pinout & Package
ADA4304-4ACPZ-EB is housed in a 16-lead, 3 mm × 3 mm LFCSP (CP-16-21) with exposed pad requiring connection to ground for thermal and electrical performance. Package height is 0.75 mm and complies with JEDEC MO-220-WEED.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 15, 16 | VCC | Power supply inputs - must be decoupled locally with 0.1 µF and 0.01 µF capacitors. |
| 3, 5–7, 9, 11 | GND | Ground terminals - connect directly to solid ground plane; EPAD must also be soldered to GND. |
| 4 | VIN | Single-ended 75 Ω RF input - requires 0.01 µF AC coupling capacitor. |
| 8 | VOUT4 | Fourth 75 Ω RF output - identical electrical characteristics to VOUT1–VOUT3. |
| 10 | VOUT3 | Third 75 Ω RF output - supports independent tuner path without isolation degradation. |
| 12 | VOUT2 | Second 75 Ω RF output - maintains ≥25 dB isolation from other outputs across full band. |
| 13 | VOUT1 | First 75 Ω RF output - primary output; no functional priority over others. |
| 14 | IL | Bias control pin - requires 1 µH RF choke to 5 V; placement proximity critical for flatness. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated SiGe amplifier + resistive divider | Eliminates discrete passive splitter + gain stage, reducing BOM count and layout area by >40%. |
| 75 Ω input/output impedance | Enables direct drop-in replacement of legacy transformer-based splitters without impedance-matching redesign. |
| −72 dBc CTB at 865 MHz | Supports 135-channel DOCSIS 3.1 deployments without upstream interference or signal degradation. |
| 25 dB output-to-output isolation | Prevents inter-tuner desensitization in quad-tuner STBs and residential gateways. |
| −40°C to +85°C operation | Validated for deployment in uncontrolled environments like set-top box enclosures and wall-mounted gateways. |
Applications
| Set-Top Box Signal Distribution | Residential Gateway RF Routing |
|---|---|
|
Use Scenario: Distributing downstream CATV signal to four independent tuners (main, PIP, OOB, DVR) within a single STB chassis. IC Role / Device Role / Timing Role: Active 1:4 RF splitter providing gain-compensated, isolated signal paths with 75 Ω interface compliance. Use Value: Replaces discrete 4-way splitter + four amplifiers, cutting board space by 65% and improving channel-to-channel isolation by 12 dB vs. passive solutions. |
Use Scenario: Feeding RF signals from a single coaxial input to multiple services (TV, VoIP, MoCA, cable modem) in a home gateway. IC Role / Device Role / Timing Role: Centralized broadband RF distribution node with flat gain and low additive noise across 54–865 MHz. Use Value: Enables concurrent service delivery without cross-talk-induced packet loss or video artifacts, verified at −72 dBc CTB. |
| Digital Cable Ready (DCR) Television | CATV Splitter Module |
|
Use Scenario: Internal signal routing in DCR TVs supporting dual or quad tuners for broadcast and streaming convergence. IC Role / Device Role / Timing Role: Single-chip RF fanout device ensuring equal amplitude and phase stability across all tuner inputs. Use Value: Achieves <1 dB gain flatness from 54–865 MHz, eliminating need for per-channel calibration or trimming networks. |
Use Scenario: Compact, surface-mountable splitter module for OEM integration into headend or node equipment. IC Role / Device Role / Timing Role: High-linearity, low-noise active splitting element rated for continuous operation in 7×24 CATV infrastructure. Use Value: Delivers −62 dBc CSO and −72 dBc CTB at 15 dBmV/channel, meeting SCTE-40 Class A linearity standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active RF splitter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4304-3ACPZ-R7 | 3-output variant; identical gain (3.3 dB), noise figure (4.6 dB), and distortion (−72 dBc CTB) but lower channel count. | Suitable for triple-tuner STBs or gateways where fourth output is unnecessary. | Select when BOM simplification and reduced routing complexity outweigh need for fourth output. |
| MAX2181AETE+T | 3-output, 50 Ω system; higher NF (5.2 dB), narrower flatness range (45–870 MHz), and no integrated bias choke requirement. | Targeted at 50 Ω infrastructure (e.g., base stations); not drop-in compatible with 75 Ω CATV designs. | Consider only if migrating to 50 Ω architecture or requiring lower quiescent current (65 mA). |
Compared with ADA4304-3ACPZ-R7 and MAX2181AETE+T, ADA4304-4ACPZ-EB uniquely provides four matched 75 Ω outputs with SiGe-level linearity and integrated bias architecture-making it the sole qualified solution for quad-tuner CATV signal distribution without external gain staging.
Availability
ADA4304-4ACPZ-EB is available at Aetrix Electronics and suitable for set-top box manufacturing, residential gateway production, and CATV infrastructure development requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADA4304-4ACPZ-EB 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.
The ADA4304-4ACPZ-EB belongs to Analog Devices' RF and microwave active splitter product line, engineered specifically for broadband CATV and terrestrial TV signal distribution where 75 Ω impedance, low distortion, and multi-output isolation are mandatory.
FAQ
What is the operating temperature range for the ADA4304-4ACPZ-EB?
The ADA4304-4ACPZ-EB is rated for continuous operation from −40°C to +85°C, validated across its full specification suite including gain flatness, noise figure, and distortion performance. This extended industrial range ensures reliability in enclosed consumer electronics such as set-top boxes and residential gateways where internal ambient temperatures may exceed 70°C.
Does the ADA4304-4ACPZ-EB require external biasing components?
Yes, the ADA4304-4ACPZ-EB requires a 1 µH RF choke (e.g., Coilcraft 0805LS-102X) connected between the 5 V supply and Pin 14 (IL). This choke establishes correct internal node biasing; improper placement or value degrades bandwidth flatness and increases ripple beyond the specified 1 dB. No additional DC blocking or level-shifting is needed on RF ports.
Can the ADA4304-4ACPZ-EB be used in 50 Ω systems?
No-the ADA4304-4ACPZ-EB is strictly optimized for 75 Ω CATV/terrestrial TV systems. Its internal matching, noise figure, and distortion specifications (e.g., −72 dBc CTB) are guaranteed only under 75 Ω source and load conditions. Using it in a 50 Ω environment causes severe return loss degradation (>10 dB worse), increased noise figure, and failure to meet linearity specs.
How does the ADA4304-4ACPZ-EB handle power supply noise sensitivity?
The ADA4304-4ACPZ-EB exhibits high PSRR (>50 dB at 100 MHz) due to its SiGe bipolar architecture and on-die regulation. However, VCC pins (1, 2, 15, 16) must be individually decoupled with 0.1 µF ceramic + 0.01 µF RF capacitor close to each pin. Failure to do so introduces gain ripple and raises CTB by up to 8 dB at 865 MHz, as confirmed in Figure 11 of the datasheet.
Is the exposed pad of the ADA4304-4ACPZ-EB electrically connected?
Yes-the exposed pad of the ADA4304-4ACPZ-EB is internally connected to ground and must be soldered to a solid PCB ground plane. Thermal resistance (θJA = 98°C/W) and electrical performance-including output-to-output isolation and noise figure-are contingent on this connection. Leaving the pad floating or using insufficient thermal vias increases junction temperature by >15°C and degrades distortion by ≥3 dBc.
ADA4304-4ACPZ-EB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- Type:
- Splitter
- Frequency:
- 54MHz ~ 865MHz
- Contents:
- Board(s)
- Utilized IC / Part:
- ADA4304-4
ADA4304-4ACPZ-EB FAQ
1.How can I place an order for ADA4304-4ACPZ-EB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4304-4ACPZ-EB 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 ADA4304-4ACPZ-EB reliable?
The price and inventory of ADA4304-4ACPZ-EB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4304-4ACPZ-EB is usually 5 days.
3.What payment methods are accepted for ADA4304-4ACPZ-EB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4304-4ACPZ-EB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4304-4ACPZ-EB?
ADA4304-4ACPZ-EB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4304-4ACPZ-EB 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 ADA4304-4ACPZ-EB?
For technical support, including ADA4304-4ACPZ-EB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4304-4ACPZ-EB requirements.
6.How does Aetrix verify that ADA4304-4ACPZ-EB is sourced from the original manufacturer or authorized distributors?
All ADA4304-4ACPZ-EB 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 ADA4304-4ACPZ-EB meets industry standards.
7.What is the process for return or replacement of ADA4304-4ACPZ-EB?
All ADA4304-4ACPZ-EB units undergo pre-shipment inspection (PSI). If there is an issue with ADA4304-4ACPZ-EB, 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 ADA4304-4ACPZ-EB part is unused and in its original packaging.
Return procedure for ADA4304-4ACPZ-EB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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