My Inquiry
My Account
Analog Devices Inc. 104085-HMC318MS8G
- Part No.:
- 104085-HMC318MS8G
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
104085-HMC318MS8G.pdf
- Description:
- EVAL BOARD HMC318MS8G
- Quantity:
- Payment:
- Shipping:
Inventory:1,361
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The 104085-HMC318MS8G from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC low-noise amplifier with automatic gain control, operating in the 5–6 GHz band. It delivers 9 dB typical gain at Vctl = 0 V, 2.5 dB noise figure, and 18 dB gain control range using a single +3 V supply. It is designed for UNII and HiperLAN RF front-ends where compact size and stable return loss across gain states are critical.
For engineers reviewing the 104085-HMC318MS8G datasheet, 104085-HMC318MS8G pinout, 104085-HMC318MS8G application, or 104085-HMC318MS8G equivalent, key selection criteria include its 5–6 GHz frequency coverage, 2.5 dB noise figure at maximum gain, 18 dB analog gain control range, MSOP-8 package footprint, and -40°C to +85°C operating temperature range.
Technical Context
The 104085-HMC318MS8G integrates a monolithic GaAs MMIC architecture with on-chip biasing and AGC functionality. Its gain is linearly controlled via a 0–3 V analog voltage (Vctl), enabling precise RF signal leveling without external components. Input and output match remain stable across the full gain range, with S11 and S22 > 6 dB and > 7 dB respectively at 5.8 GHz (Vctl = 0 V).
It operates from a single +3 V supply drawing 6–10 mA, supports 0 dBm maximum RF input power, and features ESD protection rated Class 1A (HBM). Thermal resistance is 102 °C/W (channel-to-ground paddle), and the device is qualified for operation from -40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 5–6 GHz - Covers full UNII-3 and HiperLAN/2 bands; no external tuning required. |
| Gain (Vctl = 0 V) | 9 dB typical - Enables high-sensitivity receive paths in 5.8 GHz wireless infrastructure. |
| Noise Figure | 2.5 dB typical - Supports low-SNR applications such as WLAN client receivers and radar LNA stages. |
| Gain Control Range | 18 dB - Allows dynamic range compression over 0–3 V control voltage without degrading return loss. |
| Input Return Loss | ≥6 dB - Ensures stable impedance match into 50 Ω systems across temperature and gain settings. |
| Supply Current | 6–10 mA @ +3 V - Enables ultra-low-power operation in battery-backed or energy-constrained RF modules. |
| OIP3 | 13 dBm @ Vctl = 0 V - Provides adequate linearity for multi-tone UNII-band signals before distortion onset. |
| P1dB | 2 dBm @ Vctl = 0 V - Defines usable output power ceiling before 1 dB compression in linear receive mode. |
Pinout & Package
Package: 8-lead MSOP (14.8 mm² footprint, 1 mm height), with exposed ground paddle requiring solder connection to PCB RF ground plane per datasheet layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vdd | Drain supply input | +3 V DC power input; must be decoupled locally with RF bypass capacitors. |
| Vctl | Analog gain control input | 0–3 V DC sets gain linearly; high-impedance input draws ≤25 µA. |
| RFIN | RF input port | 50 Ω matched input; accepts up to 0 dBm RF; no external matching required. |
| RFOUT | RF output port | 50 Ω matched output; delivers up to 2 dBm P1dB; requires direct ground via paddle. |
| GND (Pins 1, 4, 5, 8) | Ground terminals | Four dedicated ground pins plus exposed paddle - all must connect to solid RF ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated biasing and matching enable drop-in placement on 50 Ω microstrip layouts without discrete passives. |
| Stable return loss across gain range | S11/S22 remain ≥6 dB and ≥7 dB respectively from Vctl = 0 V to 3 V - avoids system-level VSWR shifts during AGC. |
| Ultra-small MSOP-8 footprint | 14.8 mm² area and 1 mm height support dense RF module integration in space-constrained access points and client devices. |
| Single +3 V supply operation | Eliminates need for dual-rail or high-voltage supplies - simplifies power design and reduces BOM count. |
| Class 1A ESD rating | Withstands ≥250 V HBM - enables safe handling during manual assembly and board-level test without special precautions beyond standard ESD protocols. |
Applications
| UNII-3 Wireless Access Point | HiperLAN/2 Client Receiver |
|---|---|
Use Scenario: 5.725–5.850 GHz Wi-Fi 5 (802.11a/n/ac) access point RF front-end receiving weak client signals in noisy indoor environments. IC Role / Device Role / Timing Role: First-stage LNA with AGC to maintain constant IF signal level despite varying distance and multipath fading. Use Value: 2.5 dB noise figure preserves SNR; 18 dB gain control prevents ADC saturation while maintaining >6 dB input return loss across all link conditions. |
Use Scenario: Portable laptop or tablet implementing HiperLAN/2 (ETSI BRAN) in 5.470–5.725 GHz band with variable antenna coupling and interference. IC Role / Device Role / Timing Role: Low-noise receive amplifier with analog gain scaling to adapt to changing RF path loss without digital intervention. Use Value: Stable S-parameters across gain states ensure consistent receiver calibration; MSOP-8 size fits tight mobile PCB real estate. |
| 5.8 GHz ISM Band Sensor Hub | Short-Range Radar Transceiver LNA |
Use Scenario: Industrial IoT sensor node operating in 5.725–5.875 GHz ISM band, powered by energy harvesting with strict current budget. IC Role / Device Role / Timing Role: Power-efficient LNA providing adjustable sensitivity to accommodate varying sensor signal amplitudes and battery voltage droop. Use Value: 6–10 mA supply current at +3 V enables multi-year operation; no external components reduce leakage paths and failure modes. |
Use Scenario: 5.8 GHz FMCW radar transceiver in automotive occupancy detection or smart building presence sensing. IC Role / Device Role / Timing Role: Receive-path LNA with fast analog gain control to compensate for near/far target echo amplitude variation. Use Value: 102 °C/W thermal resistance and -40°C to +85°C rating support under-hood or outdoor deployment; OIP3 = 13 dBm handles strong clutter returns without intermodulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC468LP3E | Wider 2–18 GHz range; higher 15 dB gain; 3.5 dB NF; requires +5 V supply and external matching. | Better suited for broadband test equipment or multi-band systems; not optimized for narrowband 5–6 GHz efficiency. | Select when wideband coverage or higher gain outweighs board space and power constraints. |
| QPL9547 | 5–6 GHz range; 15.5 dB gain; 1.8 dB NF; integrated active bias; 1.8–5 V supply; 2×2 mm DFN. | Superior noise performance and smaller footprint; lacks analog gain control - requires digital AGC or external VGA. | Select when lowest possible NF and minimal area are priorities, and gain control can be implemented digitally elsewhere. |
Compared with HMC468LP3E and QPL9547, the 104085-HMC318MS8G uniquely balances narrowband 5–6 GHz optimization, analog gain control, ultra-low component count, and MSOP-8 manufacturability - making it ideal for cost-sensitive, space-constrained UNII/HiperLAN designs where AGC linearity and return loss stability are mandatory.
Availability
The 104085-HMC318MS8G is available at Aetrix Electronics and suitable for UNII-3 access points, HiperLAN/2 client radios, and 5.8 GHz ISM sensor hubs requiring stable component supply, RoHS-compliant sourcing, and long-term lifecycle support.
Supply support for 104085-HMC318MS8G 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-frequency RF portfolio, including GaAs MMIC amplifiers, mixers, and switches for communications and defense markets.
The 104085-HMC318MS8G belongs to Hittite's legacy SMT low-noise amplifier product line, engineered specifically for C-band wireless infrastructure requiring high integration, low noise, and analog gain control in minimal footprint.
FAQ
What is the operating frequency range of the 104085-HMC318MS8G?
The 104085-HMC318MS8G operates from 5 to 6 GHz, covering the full UNII-3 (5.725–5.850 GHz) and HiperLAN/2 (5.470–5.725 GHz) bands. All electrical specifications-including gain, noise figure, and return loss-are characterized within this range, with peak performance centered at 5.8 GHz. The device does not support operation outside this band without significant degradation in RF performance.
Does the 104085-HMC318MS8G require external matching components?
No, the 104085-HMC318MS8G is fully matched to 50 Ω at both input and output across its 5–6 GHz band and entire gain control range. The datasheet confirms no external components are needed for basic operation-only local Vdd decoupling and proper grounding of all GND pins and the exposed paddle. This eliminates tuning complexity and improves production yield.
What is the gain control behavior of the 104085-HMC318MS8G over the control voltage range?
The 104085-HMC318MS8G provides monotonic, approximately linear gain reduction from +9 dB at Vctl = 0 V to –9 dB at Vctl = +3 V, yielding an 18 dB total control range. Gain vs. Vctl curves show <±0.5 dB deviation from linearity at 5.8 GHz. Control current remains below 25 µA, enabling direct drive from DAC outputs or precision voltage sources without buffering.
Is the 104085-HMC318MS8G still in production or obsolete?
The 104085-HMC318MS8G is marked "OBSOLETE" in the official datasheet revision v02.0607, indicating end-of-life status by Analog Devices. However, Aetrix Electronics maintains active inventory and offers last-time-buy support, extended lifecycle coordination, and cross-reference assistance for migration to functionally aligned alternatives like QPL9547 or HMC468LP3E.
How should the exposed ground paddle of the 104085-HMC318MS8G be connected on the PCB?
The exposed ground paddle of the 104085-HMC318MS8G must be soldered directly to a solid, low-inductance RF ground plane using multiple thermal vias (≥4 recommended). Per datasheet Note #5, all four ground pins (1, 4, 5, 8) and the paddle must connect to the same ground net. Failure to do so degrades S22, increases thermal resistance, and risks instability or reduced P1dB performance.
104085-HMC318MS8G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- Type:
- Amplifier
- Frequency:
- 5GHz ~ 6GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC318MS8G
104085-HMC318MS8G FAQ
1.How can I place an order for 104085-HMC318MS8G through Aetrix?
Please submit a Request for Quotation (RFQ) for 104085-HMC318MS8G 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 104085-HMC318MS8G reliable?
The price and inventory of 104085-HMC318MS8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 104085-HMC318MS8G is usually 5 days.
3.What payment methods are accepted for 104085-HMC318MS8G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 104085-HMC318MS8G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 104085-HMC318MS8G?
104085-HMC318MS8G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 104085-HMC318MS8G 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 104085-HMC318MS8G?
For technical support, including 104085-HMC318MS8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 104085-HMC318MS8G requirements.
6.How does Aetrix verify that 104085-HMC318MS8G is sourced from the original manufacturer or authorized distributors?
All 104085-HMC318MS8G 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 104085-HMC318MS8G meets industry standards.
7.What is the process for return or replacement of 104085-HMC318MS8G?
All 104085-HMC318MS8G units undergo pre-shipment inspection (PSI). If there is an issue with 104085-HMC318MS8G, 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 104085-HMC318MS8G part is unused and in its original packaging.
Return procedure for 104085-HMC318MS8G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
104085-HMC318MS8G Tags
-
113991054
Seeed Technology Co., Ltd
-
SC0918
Raspberry Pi
-
113991114
Seeed Technology Co., Ltd
-
ESP32-C6-DEVKITM-1-N4
Espressif Systems
-
ESP32-DEVKITM-1
Espressif Systems
-
C008
M5Stack Technology Co., Ltd.
-
ESP32-C3-DEVKITC-02
Espressif Systems
-
ESP32-C6-DEVKITC-1-N8
Espressif Systems
-
DFR0478
DFRobot
-
102010448
Seeed Technology Co., Ltd
-
ESP32-DEVKITC-32E
Espressif Systems
-
ESP32-DEVKITC-32UE
Espressif Systems
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
