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Analog Devices Inc. 105706-HMC431LP4
- Part No.:
- 105706-HMC431LP4
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
105706-HMC431LP4.pdf
- Description:
- BOARD EVAL VCO MMIC HMC431
- Quantity:
- Payment:
- Shipping:
Inventory:1,070
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Product details
Overview
HMC431LP4 from Analog Devices (formerly Hittite Microwave) is a GaAs InGaP HBT MMIC voltage-controlled oscillator with integrated resonator and buffer amplifier, operating in the 5.5–6.1 GHz C-band range. It delivers +2 dBm RF output at 3 V supply, exhibits −102 dBc/Hz phase noise at 100 kHz offset, and requires no external resonator-enabling compact, high-stability local oscillator designs for wireless infrastructure.
For engineers reviewing the HMC431LP4 datasheet, HMC431LP4 pinout, HMC431LP4 application, or HMC431LP4 equivalent, key selection criteria include its monolithic VCO architecture, 3V/27 mA power efficiency, 0–10 V tuning range, 9 MHzpp pulling tolerance, and QFN-24 4×4 mm leadless SMT package compatibility with RF PCB grounding best practices.
Technical Context
The HMC431LP4 integrates a negative-resistance oscillator core, varactor tuning diode, and buffer amplifier on a single GaAs die, eliminating discrete resonator dependencies and enhancing immunity to temperature drift (0.8 MHz/°C), vibration, and process variation. Its monolithic construction ensures consistent phase noise performance across −40°C to +85°C.
It operates from a single 3 V supply (27 mA typical), accepts 0–10 V analog tuning voltage with 12 MHz/V pushing sensitivity, and provides AC-coupled 50 Ω RF output. The device supports modulation via VTUNE while maintaining −15 dBc second-harmonic and −30 dBc third-harmonic suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 5.5–6.1 GHz - Covers full C-band UNII, VSAT, and 802.11a/HiperLAN channels without band switching. |
| Output Power | +2 dBm typical - Sufficient to drive mixer LO ports or cascade into low-noise amplifiers without external gain stages. |
| Phase Noise @ 100 kHz | −102 dBc/Hz - Enables high-order QAM demodulation in point-to-point radios by minimizing reciprocal mixing. |
| Tuning Voltage Range | 0–10 V - Compatible with standard DACs and PLL charge-pump outputs; supports wide frequency deviation for FM/FSK. |
| Supply Current | 27 mA @ 3 V - Low power consumption enables dense integration in multi-VCO RF front-ends with thermal margin. |
| Package | QFN-24, 4×4 mm, exposed paddle - Requires RF ground via array under paddle; supports automated reflow per MSL1 rating. |
| Operating Temperature | −40°C to +85°C - Qualified for outdoor wireless equipment and industrial-grade radio modules. |
Pinout & Package
Package: 24-lead leadless QFN (4 mm × 4 mm × 0.85 mm), exposed metal paddle for RF/DC grounding. RoHS-compliant variant HMC431LP4E uses 100% matte Sn finish; standard HMC431LP4 uses Sn/Pb.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–14, 17–19, 21, 23–24 | No Connection | Internally unconnected; must remain floating or tied to ground only if required by PCB layout symmetry. |
| 15 | RF & DC Ground | Primary ground reference for oscillator core and buffer; must connect directly to PCB ground plane. |
| 16 | RF Output | AC-coupled 50 Ω output; requires series DC-blocking capacitor (e.g., 100 pF) before SMA connector or mixer input. |
| 20 | Supply Voltage (Vcc) | 3 V DC input; bypassed internally and externally (C1 = 4.7 μF tantalum + C2 = 10,000 pF) to suppress supply noise. |
| 22 | Tuning Voltage (VTUNE) | Analog control port; bandwidth limited by source impedance; 0–10 V range yields full 5.5–6.1 GHz sweep. |
| Exposed Paddle | RF & DC Ground | Mandatory solder connection to PCB ground plane using ≥6 thermal vias; critical for phase noise and output stability. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic VCO + Buffer | Eliminates external resonator and output matching networks-reducing BOM count and layout sensitivity. |
| −102 dBc/Hz Phase Noise | Stable over temperature and vibration due to GaAs HBT process and integrated resonator-no aging drift. |
| Single 3 V Supply | 27 mA operation enables direct interface with low-voltage system rails and simplifies power sequencing. |
| 0–10 V Tuning Range | Enables precise frequency calibration and closed-loop PLL locking without external op-amp level-shifting. |
| QFN-24 Exposed Paddle | Provides low-inductance RF grounding path essential for C-band harmonic suppression and output return loss >6 dB. |
Applications
| 802.11a / HiperLAN WLAN | VSAT Radios |
|---|---|
Use Scenario: 5.725–5.825 GHz UNII-3 band access point RF front-end requiring stable local oscillator. IC Role / Device Role / Timing Role: Primary C-band VCO generating clean LO signal for upconversion and downconversion in transceiver ICs. Use Value: −102 dBc/Hz phase noise minimizes EVM degradation in 54 Mbps OFDM; +2 dBm output drives mixer without gain stage. |
Use Scenario: Outdoor satellite terminal operating in 5.925–6.425 GHz receive band with stringent adjacent-channel rejection. IC Role / Device Role / Timing Role: Low-drift LO source for LNB downconverter, synchronized to reference clock via PLL. Use Value: 0.8 MHz/°C drift rate and monolithic structure ensure stable channel alignment across −40°C to +60°C ambient. |
| UNII Point-to-Point Links | Fixed Wireless Access (FWA) Base Stations |
Use Scenario: 5.470–5.725 GHz licensed backhaul link requiring narrow-channel spectral purity. IC Role / Device Role / Timing Role: Tunable LO generator in IF-to-RF upconverter, modulated via VTUNE for frequency agility. Use Value: 12 MHz/V pushing sensitivity allows fine-grained frequency adjustment; 9 MHzpp pulling ensures stability under antenna VSWR variation. |
Use Scenario: Multi-sector base station supporting concurrent C-band channels with independent LO synthesis. IC Role / Device Role / Timing Role: Compact, low-power VCO enabling dense VCO arrays in phased-array RF modules. Use Value: 4×4 mm QFN footprint and 27 mA current allow thermal-aware placement near PA stages without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC513LP5 | Wider 4.8–5.4 GHz range; −105 dBc/Hz phase noise; 5×5 mm QFN package; 3.3 V supply. | Better phase noise but lower frequency coverage; requires PCB redesign for larger footprint and higher supply rail. | Select when tighter phase noise and broader low-C-band coverage outweigh board space and voltage constraints. |
| LMX2594RHBR | Wideband PLL+VCO IC (10 MHz–15 GHz); integrated fractional-N synthesizer; SPI programmable; 40-pin WQFN. | Replaces discrete PLL+VCO design; adds digital control, frequency hopping, and multi-channel support. | Select when system requires programmable LO generation, fast frequency switching, or integration with MCU/FPGA control. |
Compared with HMC431LP4, HMC513LP5 offers superior phase noise in a lower-frequency band but demands more PCB area and 3.3 V biasing, while LMX2594RHBR trades analog simplicity for digital flexibility and wider synthesis range-making it suitable for software-defined or multi-standard radios.
Availability
HMC431LP4 is available at Aetrix Electronics and suitable for C-band wireless infrastructure, point-to-point radios, and VSAT terminals requiring stable component supply, consistent RF performance across temperature, and lead-free or Sn/Pb assembly compatibility.
Supply support for HMC431LP4 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 acquired Hittite Microwave in 2014 and maintains its high-frequency RF portfolio, specializing in microwave/mmWave ICs for defense, communications, and instrumentation.
The HMC431LP4 belongs to Hittite's legacy MMIC VCO family, designed specifically for C-band wireless infrastructure where monolithic integration, low phase noise, and robust thermal performance are critical.
FAQ
What is the recommended PCB grounding strategy for the HMC431LP4?
Ground all 15 (GND) pins and the exposed metal paddle directly to a solid RF ground plane using ≥6 thermal vias spaced ≤2 mm apart. Maintain 50 Ω controlled impedance on RFOUT traces, place 4.7 μF tantalum and 10,000 pF capacitors close to Vcc (pin 20), and avoid routing noisy digital signals near VTUNE (pin 22). The HMC431LP4's phase noise and output stability depend critically on low-inductance grounding.
Does the HMC431LP4 require an external resonator or tuning components?
No-the HMC431LP4 integrates a monolithic GaAs resonator, varactor diode, and buffer amplifier, eliminating all external LC tanks, crystals, or tuning diodes. Only DC blocking (e.g., 100 pF) is needed on RFOUT (pin 16), and bypass capacitors on Vcc (pin 20). This reduces bill-of-materials cost and layout sensitivity while improving reliability over temperature and vibration.
What is the maximum allowable tuning voltage for the HMC431LP4?
The absolute maximum VTUNE rating for the HMC431LP4 is +11 V, but the functional tuning range is specified as 0–10 V for full 5.5–6.1 GHz coverage. Operating above 10 V may cause frequency saturation or increased phase noise; exceeding 11 V risks permanent damage. Always limit VTUNE with clamping circuitry if driven from high-swing sources.
How does the HMC431LP4 perform under varying supply voltage?
At Vcc = 2.75 V, the HMC431LP4 draws 19 mA and maintains usable output; at 3.0 V (typical), it delivers +2 dBm and −102 dBc/Hz phase noise; at 3.25 V, current rises to 34 mA with marginal output improvement but reduced efficiency. Operation outside 2.75–3.25 V is not characterized-designs should regulate tightly at 3.0 V ±5% for optimal HMC431LP4 performance.
Is the HMC431LP4 pin-compatible with the HMC431LP4E?
Yes-the HMC431LP4 and HMC431LP4E share identical pinout, footprint, and electrical specifications. The only differences are RoHS compliance (100% matte Sn vs. Sn/Pb finish) and peak reflow temperature (260°C vs. 235°C). Both are MSL1 rated and interchangeable in layout; no PCB changes are required when substituting HMC431LP4E for HMC431LP4 in new designs.
105706-HMC431LP4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bag
- Product Status:
- Active
- Type:
- Voltage Controlled Oscillator (VCO)
- Frequency:
- 5.5GHz ~ 6.1GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC431LP4
105706-HMC431LP4 FAQ
1.How can I place an order for 105706-HMC431LP4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 105706-HMC431LP4 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 105706-HMC431LP4 reliable?
The price and inventory of 105706-HMC431LP4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 105706-HMC431LP4 is usually 5 days.
3.What payment methods are accepted for 105706-HMC431LP4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 105706-HMC431LP4 transactions.
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4.How is shipping managed for 105706-HMC431LP4?
105706-HMC431LP4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 105706-HMC431LP4 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 105706-HMC431LP4?
For technical support, including 105706-HMC431LP4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 105706-HMC431LP4 requirements.
6.How does Aetrix verify that 105706-HMC431LP4 is sourced from the original manufacturer or authorized distributors?
All 105706-HMC431LP4 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 105706-HMC431LP4 meets industry standards.
7.What is the process for return or replacement of 105706-HMC431LP4?
All 105706-HMC431LP4 units undergo pre-shipment inspection (PSI). If there is an issue with 105706-HMC431LP4, 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 105706-HMC431LP4 part is unused and in its original packaging.
Return procedure for 105706-HMC431LP4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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