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Analog Devices Inc. 103240-HMC285
- Part No.:
- 103240-HMC285
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
103240-HMC285.pdf
- Description:
- BOARD EVAL HMC285E
- Quantity:
- Payment:
- Shipping:
Inventory:2,938
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Product details
Overview
HMC285 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC single-balanced passive mixer in SOT26 package, operating from 1.7–3.5 GHz RF/LO and DC–0.9 GHz IF, with +21 dBm input IP3, 30 dB LO/RF isolation, and 9–11.5 dB conversion loss at +10 dBm LO drive - deployed in PCS and W-CDMA base station transceivers.
For engineers reviewing the HMC285 datasheet, HMC285 pinout, HMC285 application, or HMC285 equivalent, key selection criteria include its ultra-small 3 mm × 3 mm SOT26 footprint, absence of external components, temperature-stable P1dB (+7 to +11 dBm), and verified RF/IF port return loss performance across -40°C to +85°C.
Technical Context
The HMC285 integrates GaAs Schottky diodes and a monolithic planar transformer balun: RF port is balanced via on-chip balun while LO connects directly to diodes. This architecture enables consistent broadband performance without external tuning components.
It operates as a passive, double-conversion-capable mixer with no bias required, supporting DC-coupled IF output and exhibiting defined spurious output levels (e.g., 2LO–RF = –12.4 dBc at 2.6 GHz RF / 2.2 GHz LO) and harmonic suppression per MxN spur table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF/LO Frequency Range | 1.7–3.5 GHz - supports full PCS (1.85–1.99 GHz) and W-CDMA (2.11–2.17 GHz) bands without retuning |
| IF Frequency Range | DC–0.9 GHz - enables baseband and low-IF architectures including zero-IF receivers |
| Conversion Loss | 9–11.5 dB - defines signal attenuation from RF to IF path; impacts receiver noise figure budget |
| Input IP3 | +17 to +21 dBm - quantifies linearity under two-tone test; critical for adjacent-channel interference rejection |
| LO–RF Isolation | 20–35 dB - limits LO leakage into antenna path; reduces need for external filtering |
| Noise Figure (SSB) | 9–11.5 dB - directly tied to conversion loss; sets minimum detectable signal level |
| Operating Temp | –40°C to +85°C - validated for industrial and outdoor wireless infrastructure environments |
Pinout & Package
SOT26 package: 3 mm × 3 mm body, 0.118″ × 0.118″ footprint, 6-lead plastic surface-mount package with Sn/Pb lead finish (HMC285) or 100% matte Sn (HMC285E), MSL1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RF+ (Balanced Input) | Positive terminal of balanced RF port; requires 50 Ω matched trace and symmetric layout |
| 2 | RF– (Balanced Input) | Negative terminal of balanced RF port; must mirror Pin 1 layout for common-mode rejection |
| 3 | GND | RF ground reference; must connect directly to PCB ground plane with multiple vias |
| 4 | LO | Single-ended LO drive input; accepts +7 to +13 dBm; no DC blocking required |
| 5 | IF | Single-ended IF output; DC-coupled; impedance-matched to 50 Ω load |
| 6 | GND | IF/LO ground reference; shares ground plane with Pin 3 but routed separately near IF/LO paths |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | On-die balun and diode array eliminate discrete transformers, capacitors, and chokes - reduces BOM count and layout area |
| Ultra-small SOT26 footprint | 3 mm × 3 mm package - smallest available for complete single-balanced mixer, enabling dense RF front-end integration |
| High LO–RF isolation | Typ. 30 dB - suppresses LO radiation into antenna path, easing EMC compliance in transmit modules |
| DC–0.9 GHz IF bandwidth | Supports direct-conversion and low-IF receiver topologies without external IF filtering or AC coupling |
| Temperature-stable IP3 | +21 dBm typ. at +25°C, +19 dBm min. at –40°C/+85°C - ensures consistent linearity across environmental extremes |
Applications
| PCS Base Stations | W-CDMA Transceivers |
|---|---|
Use Scenario: Downconversion of 1.9 GHz PCS receive signals to 100–400 MHz IF in macrocell BTS front-ends. IC Role / Device Role / Timing Role: Passive single-balanced mixer performing RF-to-IF translation with no bias or external matching. Use Value: 30 dB LO–RF isolation minimizes self-interference; 9 dB typ. conversion loss preserves SNR in cascaded LNA–mixer chains. | Use Scenario: Upconversion of 2.1 GHz W-CDMA transmit IF signals in diversity transmit paths. IC Role / Device Role / Timing Role: Single-ended LO-driven, balanced RF-output mixer used in I/Q modulator feed networks. Use Value: +21 dBm input IP3 maintains ACLR performance under high-power adjacent channel conditions. |
| 2.4 GHz ISM Radios | MMDS Receivers |
Use Scenario: Low-cost 2.4 GHz Wi-Fi or Bluetooth coexistence receiver front-end requiring compact, unfiltered mixing. IC Role / Device Role / Timing Role: DC-coupled IF mixer enabling zero-IF demodulation with integrated balun eliminating external transformers. Use Value: SOT26 size allows placement within 5 mm of antenna switch; no external components reduce bill-of-materials cost by ≥3 parts. | Use Scenario: 2.5–2.7 GHz MMDS downconverter in fixed wireless CPE units operating in outdoor temperature ranges. IC Role / Device Role / Timing Role: Industrial-grade passive mixer handling –40°C to +85°C ambient with stable conversion loss variation ≤0.5 dB. Use Value: Verified operation at +85°C ensures reliability in rooftop-mounted enclosures without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar passive mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC285E | RoHS-compliant version with 100% matte Sn lead finish and 260°C reflow peak; identical electrical specs | Required for lead-free manufacturing; same RF performance and thermal behavior | Select HMC285E for RoHS-compliant production; HMC285 for legacy Sn/Pb assembly |
| Qorvo QM11036 | Wider RF range (1.5–4.2 GHz), higher IP3 (+23 dBm), but larger 4 mm × 4 mm QFN package | Better suited for multi-band 5G NR FR1 front-ends where size is less constrained than in legacy PCS modules | Choose QM11036 when extending frequency coverage beyond 3.5 GHz or requiring >+21 dBm IP3 |
Compared with HMC285, the HMC285E offers identical RF performance with RoHS compliance, while QM11036 trades SOT26 compactness for broader bandwidth and improved linearity - making HMC285 optimal for space-constrained PCS/W-CDMA upgrades where legacy footprint must be retained.
Availability
HMC285 is available at Aetrix Electronics and suitable for PCS base stations, W-CDMA transceivers, and 2.4 GHz ISM radio designs requiring stable component supply amid obsolescence transitions.
Supply support for HMC285 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 HMC285 belongs to Hittite's legacy GaAs MMIC mixer family designed specifically for compact, high-isolation, no-bias RF front-ends in wireless infrastructure and point-to-point radios.
FAQ
Is HMC285 still in production or marked obsolete?
Yes, HMC285 is officially marked "OBSOLETE PRODUCT" per its datasheet revision v02.0907. However, Aetrix Electronics maintains active inventory and offers last-time-buy support, extended lifecycle sourcing, and cross-reference guidance for migration paths - ensuring continuity for legacy HMC285 designs in fielded equipment.
What is the difference between HMC285 and HMC285E?
HMC285 uses Sn/Pb lead finish with 235°C max reflow temperature and is not RoHS-compliant; HMC285E substitutes 100% matte Sn finish, raises max reflow to 260°C, and meets RoHS Directive 2011/65/EU - all electrical and RF specifications remain identical between HMC285 and HMC285E.
Does HMC285 require DC blocking capacitors on any port?
No, HMC285 requires no DC blocking capacitors: the LO port accepts DC-coupled drive, the IF port delivers DC-coupled output, and the balanced RF port is internally biased through the on-chip balun - enabling true DC–0.9 GHz IF operation without external AC coupling.
Can HMC285 be used for upconversion as well as downconversion?
Yes, HMC285 is bidirectional: it functions identically in upconversion (IF→RF) and downconversion (RF→IF) modes due to its passive diode-based topology - confirmed by symmetrical conversion loss, isolation, and IP3 specs across both directions in the datasheet.
What evaluation board is compatible with HMC285?
The official evaluation board for HMC285 is part number 103240, which uses Rogers 4350 substrate, 50 Ω controlled-impedance traces, and SMA connectors (J1–J3); it is documented in the HMC285 datasheet as "Evaluation PCB 103240" and was available directly from Hittite upon request.
103240-HMC285 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Mixer
- Frequency:
- 1.7GHz ~ 3.5GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC285E
103240-HMC285 FAQ
1.How can I place an order for 103240-HMC285 through Aetrix?
Please submit a Request for Quotation (RFQ) for 103240-HMC285 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 103240-HMC285 reliable?
The price and inventory of 103240-HMC285 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 103240-HMC285 is usually 5 days.
3.What payment methods are accepted for 103240-HMC285?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 103240-HMC285 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 103240-HMC285?
103240-HMC285 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 103240-HMC285 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 103240-HMC285?
For technical support, including 103240-HMC285 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 103240-HMC285 requirements.
6.How does Aetrix verify that 103240-HMC285 is sourced from the original manufacturer or authorized distributors?
All 103240-HMC285 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 103240-HMC285 meets industry standards.
7.What is the process for return or replacement of 103240-HMC285?
All 103240-HMC285 units undergo pre-shipment inspection (PSI). If there is an issue with 103240-HMC285, 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 103240-HMC285 part is unused and in its original packaging.
Return procedure for 103240-HMC285:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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