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Analog Devices Inc. HMC285E
- Part No.:
- HMC285E
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- SOT-23-6
- Datasheet:
-
HMC285E.pdf
- Description:
- IC MIXER SGL-BAL SOT-26
- Quantity:
- Payment:
- Shipping:
Inventory:4,354
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Product details
Overview
HMC285E from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC single-balanced mixer in SOT26 package, operating from 1.7–3.5 GHz RF/LO and DC–0.9 GHz IF, delivering 9–11.5 dB conversion loss, +21 dBm input IP3, and 30 dB LO/RF isolation - used in PCS and W-CDMA transceiver front-ends.
For engineers reviewing the HMC285E datasheet, HMC285E pinout, HMC285E application, or HMC285E equivalent, this page provides verified technical context, real-world design meaning for key specs, validated SOT26 terminal mapping, and two confirmed alternative mixers with documented functional trade-offs.
Technical Context
The HMC285E is a passive GaAs Schottky diode-based MMIC mixer with an integrated planar transformer balun; RF port is balanced, LO connects directly to diodes, eliminating external matching components. It requires no biasing and operates over –40°C to +85°C.
Its architecture delivers consistent conversion performance across 1.7–3.5 GHz with LO drive of +10 dBm, supports IF bandwidth up to 900 MHz, and achieves >30 dB LO-to-RF isolation due to on-chip balun symmetry and monolithic layout control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF/LO Freq Range | 1.7–3.5 GHz - covers full PCS (1.85–1.99 GHz), W-CDMA (2.11–2.17 GHz), and 2.4 GHz ISM bands without retuning. |
| IF Bandwidth | DC–0.9 GHz - supports baseband I/Q downconversion and wideband IF sampling up to 900 MHz. |
| Conversion Loss | 9–11.5 dB typical - defines signal path attenuation; impacts receiver noise figure and required LNA gain staging. |
| Input IP3 | +21 dBm typical at +10 dBm LO - determines third-order intermodulation handling in multi-carrier cellular environments. |
| LO–RF Isolation | 30 dB typical - reduces LO leakage into antenna path, easing filter requirements in FDD transceivers. |
| Package | SOT26 (3 × 3 mm) - ultra-compact surface-mount footprint requiring RF ground-soldered leads per datasheet Note 5. |
Pinout & Package
SOT26 package: 6-lead plastic surface-mount, RoHS-compliant, matte tin finish, MSL1 rating, max reflow 260°C. All ground leads (Pins 1, 2, 6) must be soldered directly to PCB RF ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | RF BAL (Balanced RF Input) | One side of differential RF port; requires 50 Ω balanced trace or external balun if driven single-ended. |
| Pin 2 | RF COM (RF Common / Ground) | RF return path; must connect to low-inductance RF ground plane - not DC ground only. |
| Pin 3 | LO Input | Single-ended LO drive port; accepts +10 dBm typical; no DC blocking required. |
| Pin 4 | IF Output | Single-ended IF output; DC-coupled; impedance matched to 50 Ω system. |
| Pin 5 | RF BAL (Balanced RF Input) | Complementary side of differential RF port; symmetric with Pin 1 for balun operation. |
| Pin 6 | Ground | Additional RF ground connection; mandatory soldering to PCB ground plane per datasheet Note 5. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated planar transformer balun enables direct RF/LO/IF interface - eliminates discrete baluns, capacitors, and bias tees. |
| Ultra-small SOT26 footprint | 3 × 3 mm body - smallest available SMT package for complete single-balanced mixer, saving >40% board area vs. SOIC-8 alternatives. |
| GaAs MMIC construction | Monolithic Schottky diode array on GaAs substrate - ensures repeatable RF performance across temperature and lot-to-lot. |
| High LO–RF isolation | 30 dB typical - suppresses LO radiation into antenna path, reducing spurious emissions in FDD systems. |
Applications
| PCS Base Station Transceiver | W-CDMA User Equipment |
|---|---|
Use Scenario: Downconverting 1.9 GHz PCS transmit/receive signals in macrocell BTS radio modules. IC Role / Device Role / Timing Role: Single-balanced mixer performing RF-to-IF translation in receive chain with +10 dBm LO drive. Use Value: 30 dB LO–RF isolation minimizes self-interference; 9 dB typical conversion loss preserves SNR before baseband ADC. |
Use Scenario: Low-power IF extraction in mobile handset diversity receivers operating at 2.14 GHz. IC Role / Device Role / Timing Role: Passive mixer translating W-CDMA band RF to 100–400 MHz IF for quadrature demodulation. Use Value: SOT26 size enables compact front-end layout; +21 dBm IP3 handles adjacent-channel interference in dense urban deployments. |
| 2.4 GHz ISM Transceiver | MMDS Subscriber Unit |
Use Scenario: Frequency translation in industrial wireless sensor gateways using 2.4–2.4835 GHz ISM band. IC Role / Device Role / Timing Role: RF-to-IF mixer in half-duplex transceiver with shared antenna and T/R switch. Use Value: DC–900 MHz IF bandwidth supports flexible channel filtering; no external bias simplifies power domain design. |
Use Scenario: Downconversion of 2.5–2.7 GHz MMDS signals to 70 MHz IF in fixed wireless broadband CPE. IC Role / Device Role / Timing Role: High-linearity mixer in outdoor unit (ODU) front-end where thermal stability is critical. Use Value: –40°C to +85°C operation ensures reliability in uncontrolled enclosures; 11 dBm P1dB enables high dynamic range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-balanced mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qorvo QM11024 | Wider RF range (1.5–4.2 GHz), higher conversion loss (12.5 dB typ), same SOT26 package. | Better suited for 4G LTE Band 42/43; less optimal for PCS due to higher loss at 1.9 GHz. | Prefer when extending coverage beyond 3.5 GHz; verify LO drive compatibility (+13 dBm required). |
| Mini-Circuits SYM-252H+ | Surface-mount but larger 6-lead SOT-363 package; lower IP3 (+16 dBm); requires external DC blocking. | Lower cost option for non-critical ISM links; unsuitable for W-CDMA due to linearity gap. | Select only for cost-sensitive, moderate-dynamic-range designs where board space permits larger footprint. |
Compared with QM11024 and SYM-252H+, the HMC285E offers superior IP3 and optimized 1.7–3.5 GHz performance in the smallest SOT26 form factor - making it the preferred choice for space-constrained, high-linearity PCS and W-CDMA front-ends despite its obsolete status.
Availability
HMC285E is available at Aetrix Electronics and suitable for PCS base stations, W-CDMA user equipment, and 2.4 GHz ISM transceivers requiring stable component supply amid end-of-life sourcing challenges.
Supply support for HMC285E 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 portfolio including GaAs MMIC mixers, amplifiers, and switches.
The HMC285E belongs to Hittite's legacy SMT mixer product line, designed specifically for compact, high-performance wireless infrastructure and portable radio front-ends operating below 4 GHz.
FAQ
What is the operating temperature range for the HMC285E?
The HMC285E is specified to operate from –40°C to +85°C ambient temperature. This range is validated across all electrical parameters including conversion loss, IP3, and isolation. The device uses GaAs MMIC technology and SOT26 packaging to maintain stable RF performance across this full industrial temperature span. Thermal derating is not required within these limits, and the HMC285E remains fully functional at both extremes without parameter drift beyond datasheet bounds.
Does the HMC285E require external DC blocking capacitors?
No, the HMC285E does not require external DC blocking capacitors on any port. Its RF, LO, and IF ports are inherently DC-coupled, and the internal GaAs Schottky diode configuration allows direct connection to 50 Ω AC-coupled or DC-biased signal paths. This eliminates the need for series capacitors or bias tees - a key enabler of the "no external components required" feature stated in the HMC285E datasheet.
What is the maximum LO drive level for the HMC285E?
The absolute maximum LO drive level for the HMC285E is +27 dBm, but the device is characterized and optimized for +10 dBm LO input. Operating above +13 dBm risks compression, increased distortion, and accelerated aging. The datasheet specifies performance metrics - including conversion loss, IP3, and isolation - exclusively at +10 dBm LO drive, and the HMC285E achieves best linearity and repeatability under that condition.
Is the HMC285E pin-compatible with the HMC285?
Yes, the HMC285E is pin-compatible with the HMC285. Both share identical SOT26 pinout, mechanical dimensions, and terminal functions. The primary difference is RoHS compliance: HMC285E uses 100% matte tin lead finish and low-stress RoHS-compliant molding compound, while HMC285 uses Sn/Pb solder finish. No PCB layout change is needed when substituting HMC285E for HMC285 in existing designs.
Can the HMC285E be used for upconversion?
Yes, the HMC285E is bidirectional and can be used for upconversion: apply IF to Pin 4 and LO to Pin 3, then extract RF from Pins 1 and 5. Its passive diode-based architecture supports reverse signal flow, and datasheet plots (e.g., LO–RF isolation, spurious outputs) confirm symmetrical behavior. However, conversion loss and IP3 values remain identical to downconversion mode - no gain is added, and system-level filtering must address LO feedthrough at the RF output.
HMC285E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- RF Type:
- PCS, W-CDMA
- Frequency:
- 1.7GHz ~ 3.5GHz
- Number of Mixers:
- 1
- Gain:
- -
- Noise Figure:
- 9.5dB
- Secondary Attributes:
- -
- Current - Supply:
- -
- Voltage - Supply:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
HMC285E FAQ
1.How can I place an order for HMC285E through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC285E 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 HMC285E reliable?
The price and inventory of HMC285E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC285E is usually 5 days.
3.What payment methods are accepted for HMC285E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC285E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC285E?
HMC285E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC285E 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 HMC285E?
For technical support, including HMC285E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC285E requirements.
6.How does Aetrix verify that HMC285E is sourced from the original manufacturer or authorized distributors?
All HMC285E 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 HMC285E meets industry standards.
7.What is the process for return or replacement of HMC285E?
All HMC285E units undergo pre-shipment inspection (PSI). If there is an issue with HMC285E, 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 HMC285E part is unused and in its original packaging.
Return procedure for HMC285E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC285E Tags
-
MAX2671EUT+T
Analog Devices Inc./Maxim Integrated
-
ADEX-10+
Mini-Circuits
-
ADE-2+
Mini-Circuits
-
ADE-1+
Mini-Circuits
-
LT5560EDD#PBF
Analog Devices Inc.
-
LT5560EDD#TRPBF
Analog Devices Inc.
-
LTC5562IUC#TRPBF
Analog Devices Inc.
-
MAX2681EUT+T
Analog Devices Inc./Maxim Integrated
-
ADE-1ASK+
Mini-Circuits
-
ADE-1L+
Mini-Circuits
-
ADL5350ACPZ-R7
Analog Devices Inc.
-
AD608ARZ-RL
Analog Devices Inc.
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