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Analog Devices Inc. HMC128G8
- Part No.:
- HMC128G8
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 8-SOIC (0.173", 4.40mm Width)
- Datasheet:
-
HMC128G8.pdf
- Description:
- IC MMIC MIXER DBL-BAL 8SMD
- Quantity:
- Payment:
- Shipping:
Inventory:1,712
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Product details
Overview
HMC128G8 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC double-balanced passive mixer in a hermetic SMT package, operating from 1.8–5.0 GHz RF/LO and DC–2.0 GHz IF, with 10 dB typical conversion loss, +18 dBm input IP3, and >30 dB LO-to-RF/IF isolation-used in wireless base station up/downconversion.
For engineers reviewing the HMC128G8 datasheet, HMC128G8 pinout, HMC128G8 application, or HMC128G8 equivalent, key selection criteria include RF/LO frequency coverage, passive diode/balun architecture, high dynamic range, thermal stability across –55°C to +125°C, and hermetic alumina-loaded glass packaging for reliability in outdoor infrastructure.
Technical Context
The HMC128G8 implements a passive diode-based double-balanced topology with integrated baluns, enabling inherent suppression of LO feedthrough and even-order distortion. Its GaAs MMIC construction delivers consistent phase and amplitude balance across 1.8–5 GHz, directly supporting high-isolation operation without external tuning.
It requires +10 to +15 dBm LO drive for optimal performance, exhibits noise figure ≈ conversion loss (10–12 dB), and maintains >28 dB LO-to-RF isolation and >20 dB LO-to-IF isolation at all frequencies within spec-critical for dense RF front-end integration in FDD systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF/LO Frequency Range | 1.8–5.0 GHz: Supports full-band operation in cellular band 3/7/8/40 and WiMAX uplink/downlink paths. |
| IF Frequency Range | DC–2.0 GHz: Enables baseband I/Q downconversion and low-IF architectures without image-reject filtering constraints. |
| Conversion Loss | 10–12 dB typ/max: Defines signal attenuation through passive mixing path; sets system NF floor equal to loss value. |
| Input IP3 | +13 to +18 dBm: Determines third-order intermodulation headroom in multi-carrier environments like LTE-4×4 MIMO base stations. |
| LO-to-RF Isolation | 28–40 dB: Reduces LO leakage into antenna path, easing filter requirements in transmit chain integration. |
| Operating Temp | –55°C to +125°C: Qualified for uncontrolled outdoor enclosures and remote radio units without active thermal management. |
| LO Drive Level | +10 to +15 dBm: Specifies required local oscillator power; lower drive reduces LO amplifier complexity and power consumption. |
Pinout & Package
Package: 8-lead ceramic SMT (alumina-loaded borosilicate glass body, Kovar leadframe, gold-plated terminals). Hermetic seal supports long-term reliability in humid/harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Ground (RF/LO/IF common) | All four corner pins and exposed paddle must be soldered to PCB ground plane for RF return path integrity and thermal dissipation. |
| 5 | RF Input | Differential RF port (balanced); requires 50 Ω microstrip matching network per evaluation board layout. |
| 6 | LO Input | Differential LO port (balanced); driven at +10 to +15 dBm; sensitive to impedance mismatch due to balun coupling. |
| 7 | IF Output | Single-ended IF output; DC-coupled; requires external AC coupling or baseband filtering depending on architecture. |
| 8 | NC | No connect; internal die bond wire not attached-must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Passive Diode/Balun Architecture | Eliminates DC bias and active device noise; enables wide temperature stability and zero power consumption in receive path. |
| Hermetic Ceramic SMT Package | Prevents moisture ingress and parameter drift over 15+ year deployments in telecom infrastructure equipment. |
| High LO-to-RF/IF Isolation | Reduces need for external LO suppression filters, lowering BOM count and insertion loss in compact front-ends. |
| DC–2 GHz IF Bandwidth | Supports direct-conversion receivers and complex modulation schemes (e.g., 256-QAM) without IF image rejection constraints. |
| –55°C to +125°C Operation | Validated for deployment in remote radio heads mounted on cell towers without enclosure heating/cooling systems. |
Applications
| Base Station Transceiver | MMDS Subscriber Unit |
|---|---|
Use Scenario: LTE/FDD macrocell transceiver performing upconversion from 120 MHz IF to 2.6 GHz band 7 UL and downconversion from 2.6 GHz band 7 DL to 120 MHz IF. IC Role / Device Role / Timing Role: Dual-role passive mixer handling both transmit and receive paths via shared LO routing and switch-controlled RF/IF directionality. Use Value: 10 dB conversion loss and +18 dBm IP3 maintain ACLR < –45 dBc under 20 MHz 4×4 MIMO loading while minimizing adjacent-channel interference. | Use Scenario: Fixed wireless broadband terminal receiving 2.5–2.7 GHz MMDS signals and converting to baseband for QPSK demodulation. IC Role / Device Role / Timing Role: Downconverter mixer with DC-coupled IF output feeding ADC interface; operates with minimal external components due to integrated balun balance. Use Value: >30 dB LO-to-RF isolation prevents LO radiation from violating FCC Part 101 radiated emission limits in unshielded outdoor enclosures. |
| Wireless LAN AP Front-End | Wireless Local Loop CPE |
Use Scenario: 5 GHz band (UNII-2/3) access point RF module performing upconversion from 1.5 GHz IF to 5.25–5.85 GHz for OFDMA transmission. IC Role / Device Role / Timing Role: High-linearity upconverter mixer driven by +15 dBm LO; interfaces with GaN PA and T/R switch via 50 Ω microstrip. Use Value: +18 dBm input IP3 ensures EVM < 3% under 802.11ac 160 MHz 256-QAM with concurrent radar detection pulses. | Use Scenario: Point-to-multipoint subscriber terminal operating in 3.5 GHz licensed band, downconverting received signal to 0–100 MHz IF for analog demodulation. IC Role / Device Role / Timing Role: Passive double-balanced mixer providing LO/RF/IF port isolation critical for half-duplex TDD operation with shared antenna. Use Value: 1.8–5 GHz RF/LO bandwidth covers entire 3.4–3.8 GHz WLL allocation with margin, eliminating need for band-specific variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar passive double-balanced mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC1048LP4E | Wider RF/LO range (0.5–6.0 GHz), higher conversion loss (11.5 dB typ), same 8-lead SMT package. | Better suited for sub-1 GHz ISM and UWB applications; less optimal for 2.6 GHz band edge performance. | Select when broader low-frequency coverage is required and 1.5 dB higher loss is acceptable. |
| QPC1006 | Same 1.8–5.0 GHz range, GaN-based active mixer, +22 dBm IP3, requires +5 V bias, 12-pin QFN. | Enables active gain but adds power supply, decoupling, and thermal design complexity. | Choose only if system-level gain budget demands active conversion and LO drive is constrained below +10 dBm. |
Compared with HMC1048LP4E and QPC1006, the HMC128G8 offers the best balance of bandwidth fidelity, passive simplicity, and proven field reliability in 2–3 GHz infrastructure deployments-without bias circuitry or frequency trade-offs outside its core band.
Availability
HMC128G8 is available at Aetrix Electronics and suitable for base station transceivers, MMDS subscriber units, Wireless LAN access points, and Wireless Local Loop CPE requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for HMC128G8 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, integrating its high-frequency RF/Microwave portfolio into ADI's Communications & RF Solutions group.
The HMC128G8 belongs to Hittite's legacy GaAs MMIC mixer family, designed specifically for high-isolation, high-dynamic-range passive mixing in wireless infrastructure and point-to-point radio systems.
FAQ
What is the recommended LO drive level for optimal performance of the HMC128G8?
The HMC128G8 achieves best conversion loss, IP3, and isolation with +10 to +15 dBm LO drive. At +15 dBm, typical conversion loss is 10 dB and input IP3 reaches +18 dBm. Driving below +10 dBm increases conversion loss and degrades linearity; exceeding +15 dBm yields diminishing returns and risks accelerated aging. The HMC128G8 datasheet specifies +27 dBm as absolute maximum LO input.
Does the HMC128G8 require DC bias or external active components to operate?
No, the HMC128G8 is a fully passive diode/balun mixer and requires no DC bias, current supply, or external active devices. It operates solely on RF, LO, and IF signal energy. All terminals except the IF output are balanced and ground-referenced; the IF output is single-ended and DC-coupled. This eliminates power supply design, decoupling, and thermal management overhead associated with active mixers.
Can the HMC128G8 be used for both upconversion and downconversion?
Yes, the HMC128G8 is bidirectional and functions identically as an upconverter or downconverter. Its symmetric double-balanced architecture allows RF and IF ports to be swapped depending on system architecture-e.g., RF port becomes IF input during upconversion, and vice versa. The HMC128G8 evaluation board (104880) demonstrates both configurations with identical matching networks.
What is the significance of the hermetic ceramic package used in the HMC128G8?
The HMC128G8 uses an alumina-loaded borosilicate glass hermetic package with Kovar leads and 50 µin gold plating. This construction prevents moisture ingress, suppresses parameter drift over time and temperature, and ensures long-term reliability in outdoor telecom equipment. Unlike plastic SMT packages, it meets MIL-STD-883 hermeticity requirements and supports 15+ year field life in uncontrolled environments.
How does the HMC128G8 compare to active mixers in terms of noise figure and dynamic range?
The HMC128G8 has a noise figure essentially equal to its conversion loss (10–12 dB), which is higher than low-noise active mixers but avoids active-device noise contributions. Its dynamic range advantage comes from +18 dBm input IP3 and high 1 dB compression point (+10 dBm), enabling robust operation in strong-signal environments like base station receivers-where active mixers often compress or generate spurs. The HMC128G8 trades noise for linearity and simplicity.
HMC128G8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.173", 4.40mm Width)
- Packaging:
- Strip
- Product Status:
- Obsolete
- RF Type:
- WLAN
- Frequency:
- 1.8GHz ~ 5GHz
- Number of Mixers:
- 1
- Gain:
- -
- Noise Figure:
- 10dB
- Secondary Attributes:
- Up/Down Converter
- Current - Supply:
- -
- Voltage - Supply:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SMT
HMC128G8 FAQ
1.How can I place an order for HMC128G8 through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC128G8 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 HMC128G8 reliable?
The price and inventory of HMC128G8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC128G8 is usually 5 days.
3.What payment methods are accepted for HMC128G8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC128G8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC128G8?
HMC128G8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC128G8 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 HMC128G8?
For technical support, including HMC128G8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC128G8 requirements.
6.How does Aetrix verify that HMC128G8 is sourced from the original manufacturer or authorized distributors?
All HMC128G8 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 HMC128G8 meets industry standards.
7.What is the process for return or replacement of HMC128G8?
All HMC128G8 units undergo pre-shipment inspection (PSI). If there is an issue with HMC128G8, 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 HMC128G8 part is unused and in its original packaging.
Return procedure for HMC128G8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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