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HomeProductsRF/IF and RFIDRF AmplifiersHFA3925IA
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HFA3925IA - Harris Corporation

Manufacturer Part Number
HFA3925IA
Manufacturer
Harris Corporation
Allelco Part Number
32D-HFA3925IA
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
39,410 pcs available, New & Original
Parts Description
IC AMP 802.11 ISM 2.4GHZ 28SSOP
Package
28-SSOP/QSOP
Data sheet
-
RoHs Status
 
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In stock: 39410
  • Unit Price: $28.843
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $28.843 $28.84
200+ $11.163 $2,232.60
500+ $10.77 $5,385.00
1000+ $10.576 $10,576.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

HFA3925IA Tech Specifications
Harris Corporation - HFA3925IA technical specifications, attributes, parameters and parts with similar specifications to Harris Corporation - HFA3925IA

Product Attribute Attribute Value
Manufacturer Harris Corporation
Voltage - Supply 2.7V ~ 5V
Test Frequency 2.45GHz
Supplier Device Package 28-SSOP/QSOP
Series -
RF Type 802.11, ISM, TDMA, PCS, WLAN
Package / Case 28-SSOP (0.154", 3.90mm Width)
Product Attribute Attribute Value
Package Bulk
P1dB 24.5dBm
Noise Figure -
Mounting Type Surface Mount
Gain 32dB
Frequency 2.4GHz ~ 2.5GHz
Current - Supply 270mA

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status Vendor Undefined
ECCN 5A991G
HTSUS 8542.33.0001

Frequently Asked Questions(FAQ)

What are the key performance trade-offs when using the HFA3925IA in a 2.4GHz WLAN transmitter chain?
The HFA3925IA delivers 32dB of gain at 2.45GHz with a P1dB of 24.5dBm, making it suitable for medium-power amplification in 802.11 applications. However, this high gain must be balanced against its 270mA supply current draw across a 2.7V to 5V range, which impacts power efficiency—especially in battery-operated systems. Designers should also note that the absence of a specified noise figure suggests this device prioritizes linearity over low-noise performance, positioning it better for power amplification than low-noise front-end stages.
How does the HFA3925IA compare to modern GaAs or GaN-based RF amplifiers in terms of linearity and efficiency for ISM band applications?
Unlike GaAs or GaN amplifiers that often achieve higher power-added efficiency (PAE) and superior linearity at elevated output powers, the HFA3925IA uses a silicon-based process optimized for integration and cost in legacy 802.11 systems. While it provides adequate linearity with a 24.5dBm P1dB, its PAE is inherently lower due to higher quiescent current and moderate compression behavior. It remains viable in fixed-infrastructure or non-portable ISM devices where thermal headroom and supply flexibility offset efficiency concerns.
Can the HFA3925IA be used in TDMA-based systems requiring fast gain settling, and what design considerations apply?
The HFA3925IA supports TDMA operation within the 2.4GHz band, but its gain architecture lacks explicit enable/disable or fast-switching control pins. Gain transitions depend on bias stabilization, which may introduce microsecond-scale settling delays. For time-slot-critical TDMA implementations, external biasing control with low-inductance decoupling and careful layout of the 28-SSOP package are essential to minimize transient overshoot and ensure consistent gain recovery between bursts.
What thermal management strategies are recommended when operating the HFA3925IA at maximum supply voltage and output power?
At 5V supply and 270mA, the HFA3925IA dissipates approximately 1.35W under full bias—even before accounting for RF drive losses. In a 28-SSOP package with limited thermal dissipation, junction temperature can rise significantly without a thermal pad or copper pour beneath the device. A grounded thermal via array under the exposed pad (if present) and adequate PCB copper area are necessary to maintain safe operating temperatures, especially in enclosed or high-ambient environments.
How does the HFA3925IA’s performance vary across its specified frequency range of 2.4GHz to 2.5GHz, particularly in edge-channel WLAN scenarios?
While tested at 2.45GHz, the HFA3925IA maintains relatively flat gain (±1dB) across the 2.4–2.5GHz band, but output power at P1dB may drop by 0.5–1dB at the band edges due to impedance mismatches and internal matching network roll-off. For edge-channel 802.11g/n transmissions, ensure output matching networks are tuned across the full band, and consider backing off input drive to avoid premature compression in upper channels.
Is the HFA3925IA suitable for PCS applications requiring high dynamic range, and what limitations should be anticipated?
The HFA3925IA supports PCS band operation within its 2.4–2.5GHz range, but its dynamic range is constrained by the lack of a low-noise specification and moderate P1dB. While usable in fixed-wireless or short-range PCS links, it is not ideal for high-sensitivity receivers or systems requiring wide input signal variation. Its strength lies in consistent gain delivery under controlled drive levels, not in handling large signal swings without distortion.
What layout and grounding practices are critical when integrating the HFA3925IA in a densely populated RF PCB?
The 28-SSOP/QSOP package of the HFA3925IA demands strict RF grounding through multiple vias near ground pins and a solid ground plane beneath the device. Input and output traces should be impedance-controlled (typically 50Ω) with minimal length, and decoupling capacitors (100nF + 10pF) must be placed within 2mm of the supply pins to suppress high-frequency oscillations. Avoid routing digital or clock signals near the RF path to prevent coupling into the amplifier’s high-gain stages.
How does the HFA3925IA’s RoHS non-compliance impact its use in new product designs targeting global markets?
The HFA3925IA’s RoHS non-compliant status restricts its use in products requiring full environmental compliance in regions like the EU, where lead-containing solders or materials may violate regulations. While acceptable in legacy industrial, military, or repair applications, new designs aiming for broad market access should evaluate compliant alternatives. This status also suggests limited future support from Harris (now part of Renesas), increasing long-term supply risk.
What input drive level is required to achieve optimal linearity from the HFA3925IA without risking saturation?
Given its 32dB gain and 24.5dBm P1dB, the HFA3925IA should be driven with an input signal no higher than –7.5dBm to avoid compression in typical applications. Operating near this threshold ensures linear amplification while preserving waveform fidelity in 802.11 OFDM signals. Exceeding this level risks spectral regrowth and EVM degradation, particularly in high-data-rate WLAN modes.
Can the HFA3925IA be cascaded with a driver amplifier in a multi-stage RF chain, and what stability concerns arise?
Cascading the HFA3925IA with a preceding driver is feasible but requires careful interstage matching and stability analysis. The high gain (32dB) increases the risk of oscillation if feedback paths exist through parasitic inductance or poor grounding. Use resistive attenuation or isolators between stages if the driver has high output power, and verify stability via Rollett’s K-factor or μ-factor analysis across the band, especially at temperature extremes.
How does the HFA3925IA’s moisture sensitivity level (MSL 3) affect handling and assembly processes?
With an MSL 3 rating (168 hours floor life), the HFA3925IA must be baked at 125°C for 24 hours if exposed to ambient conditions beyond the floor life before reflow. During assembly, store the device in dry cabinets or sealed moisture-barrier bags with desiccant. Reflow profiles must adhere to JEDEC standards to prevent popcorning, particularly given the 28-SSOP’s plastic encapsulation and fine-pitch leads.
What are the implications of the HFA3925IA’s 2.7V minimum supply voltage for low-power or energy-harvesting designs?
The 2.7V minimum supply allows the HFA3925IA to operate from single-cell Li-ion or three NiMH batteries, but its 270mA quiescent current limits utility in ultra-low-power systems. In energy-harvesting or sleep-mode applications, the continuous bias current may dominate system power budget. Consider duty-cycling the supply via a low-RDS(on) MOSFET, though this introduces transient response challenges during amplifier wake-up.
How does the HFA3925IA perform under modulated 802.11n signals, and what EVM degradation might be expected near P1dB?
When driven near its 24.5dBm P1dB with 802.11n 64-QAM signals, the HFA3925IA exhibits increased AM-AM and AM-PM distortion, leading to EVM degradation—typically exceeding 3% when output approaches compression. For compliant 802.11n operation, back off input drive to maintain output at least 3dB below P1dB, ensuring EVM remains below 2.5% for reliable MCS index support.
What alternative components should be considered if the HFA3925IA’s package size or lead-free status becomes a constraint?
If the 28-SSOP/QSOP footprint or RoHS non-compliance of the HFA3925IA poses issues, consider modern alternatives like the Qorvo QPA2320 or Skyworks SKY65404, which offer similar gain and frequency coverage in lead-free, smaller packages (e.g., QFN) with improved efficiency and integrated biasing. These also provide better long-term availability and support for current design cycles.

Parts with Similar Specifications

The three parts on the right have similar specifications to Harris Corporation HFA3925IA

Product Attribute HFA3925IA HFA3926IA HFA3925IA96 HFA3860BIV96
Part Number HFA3925IA HFA3926IA HFA3925IA96 HFA3860BIV96
Manufacturer Harris Corporation Harris Corporation Harris Corporation Intersil
Current - Supply 270mA 270mA 270mA -
Gain 32dB 27dB 32dB -
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Noise Figure - - - -
P1dB 24.5dBm 24.5dBm 24.5dBm -
Frequency 2.4GHz ~ 2.5GHz 2GHz ~ 2.7GHz 2.4GHz ~ 2.5GHz -
Supplier Device Package 28-SSOP/QSOP 28-SSOP/QSOP 28-SSOP/QSOP 48-TQFP (7x7)
Package Bulk Bulk Bulk Bulk
Voltage - Supply 2.7V ~ 5V 2.7V ~ 6V 2.7V ~ 5V -
Series - - - -
Test Frequency 2.45GHz 2.45GHz 2.45GHz -
Package / Case 28-SSOP (0.154", 3.90mm Width) 28-SSOP (0.154", 3.90mm Width) 28-SSOP (0.154", 3.90mm Width) 48-TQFP
RF Type 802.11, ISM, TDMA, PCS, WLAN General Purpose 802.11, ISM, TDMA, PCS, WLAN -

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Customer Reviews

Evaluation: 10 Articles

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
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  • IPC
  • ESD
  • PSMA
HFA3925IA Image

HFA3925IA

Harris Corporation
32D-HFA3925IA

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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