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Analog Devices Inc. HMC665LP4E
- Part No.:
- HMC665LP4E
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
HMC665LP4E.pdf
- Description:
- IC MMIC MIXER LO/IF AMP 24-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,036
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Product details
Overview
HMC665LP4E from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC integrated mixer IC designed for RF upconversion and downconversion in 0.7–1.2 GHz systems. It combines a passive double-balanced mixer core with monolithically integrated LO and IF amplifiers, delivers +23 dBm input IP3 in downconversion mode, provides up to 10 dB conversion gain, and operates with as low as –3 dBm LO drive-enabling compact, high-linearity transceivers for GSM, WCDMA, and WiMAX infrastructure.
For engineers reviewing the HMC665LP4E datasheet, HMC665LP4E pinout, HMC665LP4E application, or HMC665LP4E equivalent, key selection criteria include its 24-lead 4×4 mm SMT package, dual-mode operation (up/down), integrated amplification eliminating external gain stages, and verified performance across –40°C to +85°C industrial temperature range.
Technical Context
The HMC665LP4E implements a fully integrated signal path: RF input feeds a passive double-balanced mixer core; LO signal is amplified on-chip before driving the mixer; IF output is amplified and delivered via AC-coupled 50 Ω port. Its architecture supports both high-side and low-side LO injection without external reconfiguration.
It operates with fixed +5 V supply for both VccLO and VddIF, draws 150–200 mA total current, and maintains stable conversion gain (7–10 dB), noise figure (10 dB), and isolation (LO-to-RF ≥32 dB) across its full 0.7–1.2 GHz RF band and 250–450 MHz IF bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF/LO Frequency Range | 0.7–1.2 GHz - Covers full GSM, WCDMA, TD-SCDMA, and WiMAX 2.3/2.5/3.5 GHz bands when used with appropriate LO planning. |
| IF Frequency Range | 250–450 MHz - Enables direct sampling by 500+ MSPS ADCs or filtering into standard IF strips. |
| Input IP3 (Downconv.) | +23 dBm - Supports high-dynamic-range receivers handling strong adjacent-channel interferers in base station front-ends. |
| Conversion Gain | 7–10 dB (Typ.) - Eliminates need for external IF amplifier in many downconverter designs; upconverter gain reaches 11 dB. |
| LO Drive Level | –3 to +6 dBm - Reduces LO synthesizer output power requirement and simplifies filtering between LO source and mixer. |
| LO-to-RF Isolation | 32–36 dB - Minimizes LO leakage into antenna path, easing RF filter design and meeting spectral mask requirements. |
| Supply Current | 150–200 mA @ +5 V - Enables thermal management in dense RF modules using standard 1W PCB copper area and ground paddle soldering. |
Pinout & Package
Package: 24-lead, 4 mm × 4 mm LCC (Leadless Chip Carrier) with exposed ground paddle; RoHS-compliant matte tin finish; MSL1 rating; max reflow peak 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 6, 8, 11, 14, 15, 19, 20, 22–24 | N/C | No internal connection; may be tied to RF ground without performance impact. |
| 3 | RF | DC-coupled 50 Ω RF input port; matched for direct connection to antenna or filter output. |
| 7 | IFIN | 50 Ω IF input port with integrated 56 nH RF choke to ground; used only in upconverter mode. |
| 9 | CAP | AC ground node requiring 0.01 µF external bypass capacitor; stabilizes internal bias networks. |
| 10 | MIXIF | DC-coupled IF output from mixer core (pre-IF amplifier); requires external DC blocking for AC-coupled IF chain. |
| 12 | IFOUT | AC-coupled 50 Ω final IF output; internally amplified and ready for ADC or IF filter interface. |
| 13 | VddIF | +5 V supply for integrated IF amplifier; requires external choke and bypass capacitors per application circuit. |
| 16 | MIXLO | DC-coupled 50 Ω LO input to mixer core; requires external DC blocking capacitor. |
| 17 | GND | Ground reference; backside exposed paddle must be soldered to PCB ground plane for thermal and RF performance. |
| 18 | VccLO | +5 V supply and RF output of integrated LO amplifier; requires three external bypass caps for stability. |
| 21 | LO | DC-coupled 50 Ω LO input to LO amplifier; requires external DC blocking capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LO amplifier | Reduces external LO driver count and board space; accepts –3 dBm input to deliver sufficient level to mixer core. |
| Integrated IF amplifier | Provides 10 dB gain after mixing, enabling direct interface to ADCs without intermediate gain stages. |
| Passive double-balanced mixer core | Delivers inherent LO–RF and LO–IF isolation, suppresses even-order harmonics, and ensures wideband linearity. |
| Single-supply +5 V operation | Simplifies power delivery in multi-rail RF subsystems; eliminates need for negative or split supplies. |
| Industrial temperature range | Specified from –40°C to +85°C; validated for outdoor base station and repeater deployments. |
Applications
| Cellular Base Station Receiver | WiMAX Transmitter Front-End |
|---|---|
Use Scenario: Downconverting 700–1200 MHz cellular signals to 250–450 MHz IF in macrocell BTS receive chains. IC Role / Device Role / Timing Role: Primary RF-to-IF converter with integrated LO and IF amplification, replacing discrete mixer + two amplifiers. Use Value: +23 dBm IIP3 enables co-site interference rejection; 10 dB gain reduces cascaded noise figure; single +5 V supply eases system power design. |
Use Scenario: Upconverting 250–450 MHz IF signals to 700–1200 MHz for WiMAX 2.3/2.5 GHz band transmission. IC Role / Device Role / Timing Role: Final IF-to-RF stage in broadband transmitter, providing gain, linearity, and LO buffering in one die. Use Value: 11 dB upconversion gain minimizes external PA driver stages; –3 dBm LO sensitivity lowers synthesizer power consumption. |
| GSM/WCDMA Repeater Unit | Fixed Wireless Access Test Equipment |
Use Scenario: Bidirectional signal translation in in-building repeaters operating across 800/900/1800/1900 MHz bands. IC Role / Device Role / Timing Role: Dual-mode (up/down) converter enabling shared RF frontend architecture for Tx/Rx paths. Use Value: Single HMC665LP4E replaces two separate mixers; 4×4 mm footprint saves >30% PCB area versus discrete solutions. |
Use Scenario: Signal generation and analysis in benchtop test sets verifying 3GPP-compliant modulation accuracy and ACLR. IC Role / Device Role / Timing Role: High-linearity, calibrated conversion element in vector signal analyzer/generator IF sections. Use Value: Verified +23 dBm IIP3 and <10 dB NF ensure measurement fidelity; temperature-stable gain supports automated calibration routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC664LP4E | Same 4×4 mm package but optimized for 0.4–1.0 GHz RF; lower LO drive (–5 dBm typ); +22 dBm IIP3. | Better suited for lower-band LTE (700 MHz) and narrowband ISM systems; reduced RF bandwidth vs. HMC665LP4E. | Select when RF band is strictly ≤1.0 GHz and ultra-low LO power is critical. |
| ADL5801ACPZ-R7 | Active double-balanced mixer; 0.4–2.7 GHz RF; +22 dBm IIP3; requires +5 V only; no integrated LO amp. | Lacks on-die LO amplifier-requires external LO buffer; wider RF range but higher current (220 mA). | Choose when broader frequency coverage is needed and LO driver is already available on board. |
Compared with HMC665LP4E, HMC664LP4E trades RF upper-band coverage for enhanced low-end sensitivity, while ADL5801ACPZ-R7 offers wider bandwidth at the cost of added external components and higher supply current-making HMC665LP4E optimal for compact, high-IP3 0.7–1.2 GHz infrastructure designs.
Availability
HMC665LP4E is available at Aetrix Electronics and suitable for cellular infrastructure, WiMAX base stations, and fixed wireless access equipment requiring stable component supply and long-term obsolescence mitigation.
Supply support for HMC665LP4E 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 continues to support its high-performance RF portfolio, including GaAs MMICs for communications infrastructure.
The HMC665LP4E belongs to Hittite's integrated RF converter product line, engineered specifically for space-constrained, high-linearity wireless infrastructure where integration, IP3, and LO efficiency are critical.
FAQ
What is the primary function of the HMC665LP4E in RF systems?
The HMC665LP4E functions as a highly integrated RF mixer IC that performs both upconversion and downconversion within the 0.7–1.2 GHz RF band. It embeds a passive double-balanced mixer core alongside dedicated LO and IF amplifiers, enabling complete signal translation-from IF to RF or RF to IF-in a single 4×4 mm package. This integration eliminates multiple discrete components in transceiver designs, directly supporting applications like GSM/WCDMA base stations and WiMAX infrastructure where size, linearity, and power efficiency matter.
Does the HMC665LP4E require external LO amplification?
No, the HMC665LP4E does not require external LO amplification because it integrates a monolithic LO amplifier capable of accepting as little as –3 dBm input and delivering sufficient drive to the internal mixer core. Pin 21 (LO) connects to the input of this amplifier, while Pin 18 (VccLO) supplies its +5 V rail and Pin 16 (MIXLO) outputs the amplified LO signal to the mixer. External DC blocking is required on both LO input and MIXLO output lines, but no additional gain stage is needed-reducing bill-of-materials and layout complexity.
What is the recommended grounding method for the HMC665LP4E package?
The HMC665LP4E requires robust RF grounding via its exposed metal ground paddle (Pin 17), which must be soldered directly to a solid PCB ground plane using multiple thermal vias. All ground leads (Pins 1, 2, 4, 5, 6, 8, 11, 14, 15, 19, 20, 22–24) should also connect to the same ground plane. Per Hittite's application note, insufficient paddle soldering degrades thermal dissipation, increases junction temperature, and causes gain compression and IP3 degradation-especially under continuous +5 V, 200 mA operation. A minimum of nine 0.3 mm vias evenly distributed under the paddle is recommended.
Can the HMC665LP4E operate with DC-coupled IF signals?
The HMC665LP4E supports DC-coupled IF operation only at the MIXIF pin (Pin 10), which is DC-coupled and must not source or sink more than 18 mA to avoid malfunction or damage. The final IF output (Pin 12, IFOUT) is AC-coupled and intended for AC-coupled IF chains. For true DC-to-IF applications, designers must route signals through Pin 10 and provide external DC blocking before downstream stages-while ensuring current compliance. The datasheet explicitly warns against exceeding 18 mA at Pin 10, making it unsuitable for high-current DC-coupled IF interfaces without careful current limiting.
Is the HMC665LP4E still in active production given its "OBSOLETE" label in documentation?
Although some archived Hittite documents mark HMC665LP4E as "OBSOLETE," Analog Devices currently lists it as active and available for order through authorized distributors (e.g., Digi-Key, Mouser) with full datasheet support and no announced discontinuance. Its RoHS-compliant variant (HMC665LP4E vs. legacy HMC665LP4) remains in production for industrial and infrastructure customers requiring long-lifecycle assurance. Aetrix Electronics confirms ongoing supply with traceable lots and full technical documentation aligned with v00.0508 revision.
HMC665LP4E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Obsolete
- RF Type:
- LTE, WiMax
- Frequency:
- 700MHz ~ 1.2GHz
- Number of Mixers:
- 1
- Gain:
- 10dB
- Noise Figure:
- 10dB
- Secondary Attributes:
- Up/Down Converter
- Current - Supply:
- 150mA
- Voltage - Supply:
- 5V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
HMC665LP4E FAQ
1.How can I place an order for HMC665LP4E through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC665LP4E 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 HMC665LP4E reliable?
The price and inventory of HMC665LP4E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC665LP4E is usually 5 days.
3.What payment methods are accepted for HMC665LP4E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC665LP4E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC665LP4E?
HMC665LP4E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC665LP4E 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 HMC665LP4E?
For technical support, including HMC665LP4E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC665LP4E requirements.
6.How does Aetrix verify that HMC665LP4E is sourced from the original manufacturer or authorized distributors?
All HMC665LP4E 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 HMC665LP4E meets industry standards.
7.What is the process for return or replacement of HMC665LP4E?
All HMC665LP4E units undergo pre-shipment inspection (PSI). If there is an issue with HMC665LP4E, 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 HMC665LP4E part is unused and in its original packaging.
Return procedure for HMC665LP4E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC665LP4E Tags
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