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Analog Devices Inc. HMC485MS8G
- Part No.:
- HMC485MS8G
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
HMC485MS8G.pdf
- Description:
- IC MMIC MIXER HI IP3 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,701
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Product details
Overview
HMC485MS8G from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC passive mixer with integrated LO amplifier, designed for high-dynamic-range RF downconversion and upconversion in 1.7–2.4 GHz systems. It delivers +34 dBm input IP3, 9.2 dB typical conversion loss, and operates from a single +5 V supply drawing 45 mA - optimized for low-side LO architectures in GSM/UMTS infrastructure.
For engineers reviewing the HMC485MS8G datasheet, HMC485MS8G pinout, HMC485MS8G application, or HMC485MS8G equivalent, key selection criteria include its +34 dBm input IP3 at 0 dBm LO drive, 50–300 MHz IF bandwidth, and MSOP-8 package compatibility with compact RF front-end layouts requiring minimal external biasing.
Technical Context
The HMC485MS8G implements a double-balanced passive mixer core with monolithically integrated GaAs LO driver amplifier, enabling operation with low LO drive (–2 to +4 dBm) while maintaining high linearity. Its architecture supports both downconversion and upconversion modes, with specified performance across four RF sub-bands (1.7–1.8, 1.8–2.0, 2.0–2.2, 2.2–2.4 GHz).
It features DC-coupled RF and IF ports (50 Ω matched), AC-coupled LO input, and requires external bypassing on Vdd (Pin 4). Grounding of Pins 3/6/7 and the exposed paddle is mandatory per RF design best practices, as confirmed by evaluation board layout guidelines and absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 1.7–2.4 GHz - covers PCS, UMTS Band I/II, and LTE Bands 1/3/25 for infrastructure transceivers. |
| LO Frequency Range | 1.4–2.35 GHz - supports low-side LO injection with ≥200 MHz image rejection margin in typical IF plans. |
| IF Frequency Range | 50–300 MHz - enables direct sampling or IF filtering for GSM/CDMA/W-CDMA baseband processing. |
| Input IP3 (Typ.) | +34 dBm at 0 dBm LO - enables handling of strong interferers without distortion in multi-carrier BTS receivers. |
| Conversion Loss | 9.2 dB typical - defines system noise figure contribution; lower than many active mixers, preserving SNR. |
| LO Drive Requirement | –2 to +4 dBm - reduces need for external LO buffer stages, simplifying signal chain power budget. |
| Supply | +5 V @ 45 mA - single-supply operation compatible with standard RF subsystem rails; no negative voltage needed. |
Pinout & Package
Package: 8-lead MSOP (Mini Small Outline Package), 3.0 × 3.0 × 1.1 mm body, exposed thermal paddle, MSL1 rating, Sn/Pb lead finish. Total footprint area: 14.8 mm².
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | LO Input | AC-coupled 50 Ω port; accepts –2 to +4 dBm LO drive; requires external DC blocking if driven from biased source. |
| 2 | No Connect | Internally unconnected; must remain floating - no PCB trace or via allowed. |
| 3, 6, 7 | Ground | RF ground terminals; must be soldered directly to solid PCB ground plane with multiple vias for low-inductance return path. |
| 4 | Vdd | +5 V supply for integrated LO amplifier; requires external 10,000 pF bypass capacitor (0603) per evaluation board reference design. |
| 5 | IF Output/Input | DC-coupled port; supports DC–300 MHz; current limited to ±40 mA - external series capacitor required unless DC-coupled IF path is used. |
| 8 | RF Input/Output | DC-coupled 50 Ω matched port; handles +19 dBm P1dB; must be impedance-matched to antenna or PA/LNA interface. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LO amplifier | Eliminates discrete LO buffer stage, reducing component count and board area in 1.7–2.4 GHz transceivers. |
| +34 dBm input IP3 | Enables coexistence with strong adjacent-channel signals in dense cellular base stations without intermodulation degradation. |
| Ultra-small MSOP-8 footprint (14.8 mm²) | Supports high-density RF module designs where space is constrained, such as small-cell radios and repeaters. |
| Low LO drive sensitivity (–2 to +4 dBm) | Permits direct connection to low-power synthesizers or VCOs, lowering overall system power consumption. |
| 50–300 MHz IF bandwidth | Accommodates wideband modulation schemes including OFDMA and CDMA2000 without IF filter redesign. |
Applications
| GSM/EDGE Base Station Receiver | UMTS/W-CDMA Transmitter |
|---|---|
Use Scenario: Downconverting 1.9–2.0 GHz RF signals to 200 MHz IF in macrocell BTS receive chains under high-interference urban conditions. IC Role / Device Role / Timing Role: Passive double-balanced mixer with integrated LO amplifier performing frequency translation and image rejection. Use Value: +34 dBm IP3 ensures minimal third-order distortion when processing multiple simultaneous carriers, preserving EVM and ACLR compliance. |
Use Scenario: Upconverting 120 MHz IF signals to 2.1 GHz UMTS Band I transmit band in distributed antenna systems. IC Role / Device Role / Timing Role: High-linearity upconverter mixer with low-side LO configuration and DC-coupled IF interface. Use Value: 9.2 dB conversion loss and +19 dBm P1dB allow efficient drive of subsequent PA stages without gain compression artifacts. |
| Cable Modem Termination System (CMTS) | PCS Band Small-Cell Radio |
Use Scenario: Processing DOCSIS 3.1 upstream channels (5–85 MHz) translated to 1.7–1.8 GHz for fiber node aggregation. IC Role / Device Role / Timing Role: Wideband IF-to-RF upconverter supporting 50–300 MHz IF range and low-side LO injection. Use Value: 50–300 MHz IF bandwidth accommodates full upstream spectrum without re-tuning; MSOP-8 enables compact CMTS card layout. |
Use Scenario: Embedded in 2.3–2.4 GHz LTE TDD small-cell radio front-end for enterprise deployment with tight thermal constraints. IC Role / Device Role / Timing Role: Low-power, high-IP3 mixer enabling receiver dynamic range extension without active bias complexity. Use Value: Single +5 V supply and 45 mA current simplify power delivery; exposed paddle aids thermal dissipation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-IP3 mixer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC1040LP4E | Wider RF range (1.7–4.2 GHz), higher +38 dBm IP3, but requires +8 V supply and larger 4×4 mm QFN package. | Better suited for multi-band macro base stations needing extended frequency coverage beyond 2.4 GHz. | Select HMC1040LP4E only if >2.4 GHz operation or higher IP3 margin is required; not drop-in compatible due to voltage and package mismatch. |
| ADL5802ACPZ-R7 | Active mixer with +24 dBm IP3, 7.5 dB conversion gain, 3.3 V operation, and integrated LO buffer - but higher noise figure (9.5 dB vs. 9.2 dB). | Preferred for battery-powered or low-voltage portable infrastructure where gain is critical and IP3 >+30 dBm suffices. | Choose ADL5802ACPZ-R7 when system-level gain budget is constrained and 3.3 V supply is mandatory; trade-off is 10 dB lower IP3 than HMC485MS8G. |
Compared with HMC1040LP4E and ADL5802ACPZ-R7, the HMC485MS8G offers optimal balance of ultra-high IP3 (+34 dBm), compact MSOP-8 size, and +5 V simplicity for 1.7–2.4 GHz fixed infrastructure - making it uniquely suitable for cost- and space-sensitive small-cell and repeater designs where linearity is paramount.
Availability
HMC485MS8G is available at Aetrix Electronics and suitable for GSM/EDGE base station receivers, UMTS/W-CDMA transmitters, and cable modem termination systems requiring stable component supply and long-term obsolescence mitigation support.
Supply support for HMC485MS8G 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 product portfolio, emphasizing precision analog, RF, and microwave solutions for communications and defense.
The HMC485MS8G belongs to Hittite's legacy high-IP3 GaAs MMIC mixer family, engineered specifically for cellular infrastructure applications demanding exceptional linearity, low LO drive, and minimal footprint in 1.7–2.4 GHz bands.
FAQ
What is the recommended LO drive level for optimal linearity in the HMC485MS8G?
The HMC485MS8G achieves its best input IP3 (+34 dBm) at 0 dBm LO drive, with usable range from –2 to +4 dBm. Driving below –2 dBm increases conversion loss and degrades isolation; above +4 dBm risks exceeding absolute maximum LO input rating (+10 dBm) and may cause compression. For production designs, 0 dBm is the target LO level per datasheet characterization.
Does the HMC485MS8G require external matching networks on RF or IF ports?
No - the HMC485MS8G has internally matched 50 Ω RF and IF ports (DC-coupled), eliminating need for external matching components. However, the LO port is AC-coupled and 50 Ω matched, so an external DC-blocking capacitor is required if the LO source is DC-biased. The evaluation board uses no RF/IF matching, confirming intrinsic broadband 50 Ω interface.
Can the HMC485MS8G be used in upconversion mode, and what is its upconversion IP3?
Yes - the HMC485MS8G supports upconversion with +27 dBm input IP3 (typical) at 0 dBm LO drive, as verified in the "Upconverter Performance" section of the datasheet. This value is lower than its +34 dBm downconversion IP3 due to inherent asymmetry in passive mixer topology, but remains sufficient for UMTS/W-CDMA transmitter linearity requirements.
What is the thermal management requirement for continuous operation of the HMC485MS8G?
The HMC485MS8G must have its exposed paddle and Pins 3/6/7 soldered to a solid PCB ground plane with ≥6 thermal vias (0.3 mm diameter) to maintain channel temperature ≤150 °C. At +85 °C ambient, derating begins at 0.85 W dissipation; actual power draw is 225 mW (+5 V × 45 mA), well within safe limits when proper grounding and copper area are implemented.
Is the HMC485MS8G pin-compatible with the HMC485MS8GE variant?
Yes - the HMC485MS8G and HMC485MS8GE share identical pinout, electrical specifications, and mechanical outline. The only differences are RoHS compliance (matte Sn finish vs. Sn/Pb), MSL1 peak reflow temperature (260 °C vs. 235 °C), and package marking. Both are functionally interchangeable in existing designs without layout changes.
HMC485MS8G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Strip
- Product Status:
- Obsolete
- RF Type:
- W-CDMA, CDMA, GSM, UMTS
- Frequency:
- 1.7GHz ~ 2.4GHz
- Number of Mixers:
- 1
- Gain:
- -
- Noise Figure:
- 9.8dB
- Secondary Attributes:
- Up/Down Converter
- Current - Supply:
- 45mA
- Voltage - Supply:
- 5V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
HMC485MS8G FAQ
1.How can I place an order for HMC485MS8G through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC485MS8G 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 HMC485MS8G reliable?
The price and inventory of HMC485MS8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC485MS8G is usually 5 days.
3.What payment methods are accepted for HMC485MS8G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC485MS8G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC485MS8G?
HMC485MS8G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC485MS8G 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 HMC485MS8G?
For technical support, including HMC485MS8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC485MS8G requirements.
6.How does Aetrix verify that HMC485MS8G is sourced from the original manufacturer or authorized distributors?
All HMC485MS8G 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 HMC485MS8G meets industry standards.
7.What is the process for return or replacement of HMC485MS8G?
All HMC485MS8G units undergo pre-shipment inspection (PSI). If there is an issue with HMC485MS8G, 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 HMC485MS8G part is unused and in its original packaging.
Return procedure for HMC485MS8G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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