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Analog Devices Inc. 107949-HMC270MS8G
- Part No.:
- 107949-HMC270MS8G
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
107949-HMC270MS8G.pdf
- Description:
- BOARD EVAL SWITCH SPDT HMC270
- Quantity:
- Payment:
- Shipping:
Inventory:3,706
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Product details
Overview
HMC270MS8G from Hittite Microwave Corporation is a GaAs MMIC SPDT switch optimized for non-reflective RF signal routing in DC–8 GHz systems, featuring 1.2 dB typical insertion loss at 2 GHz, 45 dB isolation at 6 GHz, and -5 V/0 V negative-control logic. It serves as the core RF path selector in CATV distribution amplifiers and wireless LAN front-ends.
For engineers reviewing the HMC270MS8G datasheet, HMC270MS8G pinout, HMC270MS8G application, or HMC270MS8G equivalent, key selection criteria include its non-reflective architecture, MSOP-8 package footprint, DC-coupled operation capability, and compatibility with standard TTL/CMOS driver circuits via level-shifting.
Technical Context
The HMC270MS8G implements a monolithic GaAs pHEMT-based SPDT topology with integrated DC blocking and matched 50 Ω terminations in both "off" states. Its non-reflective design ensures minimal impedance discontinuity during switching, critical for broadband signal integrity across DC–8 GHz.
Control interface uses dual-rail negative voltage logic (0 V / –5 V), enabling true DC coupling without external bias tees. Switching speed is defined by 20 ns rise/fall time and 50 ns turn-on/turn-off delay, supporting fast TDD and antenna diversity timing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | DC to 8.0 GHz - supports baseband through X-band RF routing without band segmentation |
| Insertion Loss | 1.2 dB max @ 2 GHz - preserves signal amplitude in high-gain receiver chains |
| Isolation | 45 dB @ 6 GHz - prevents crosstalk between transmit/receive paths in FDD systems |
| Return Loss (On State) | 14 dB min @ 2 GHz - ensures <10% reflected power into source under active path |
| P1dB | 23 dBm @ 0.5–8 GHz - handles +200 mW CW input before 1 dB gain compression |
| IP3 | 36 dBm @ 0.5–8 GHz - maintains linearity for multi-tone signals in broadband transceivers |
| Switching Time | 20 ns tRISE/tFALL - enables sub-50 ns state transitions for time-division duplexing |
Pinout & Package
Package: MSOP-8 (14.8 mm²), thermally enhanced with exposed ground paddle; RoHS-compliant matte tin lead finish; MSL1 rating; requires soldering of all ground leads and paddle to PCB RF ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Control A (VA) | Active-high logic input for RFC→RF1 path; accepts 0 V (low) or –5 V (high) control |
| 2 | Ground | RF and DC ground reference; must be connected to PCB ground plane |
| 3 | RF1 | First RF output port; 50 Ω matched, non-reflective when off |
| 4 | Ground | RF and DC ground reference; must be connected to PCB ground plane |
| 5 | RFC | Common RF input port; DC-coupled, supports baseband through 8 GHz |
| 6 | Ground | RF and DC ground reference; must be connected to PCB ground plane |
| 7 | RF2 | Second RF output port; 50 Ω matched, non-reflective when off |
| 8 | Control B (VB) | Active-high logic input for RFC→RF2 path; complementary to Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| Non-reflective SPDT architecture | Terminates both RF1 and RF2 in 50 Ω when off, eliminating signal reflections during state change |
| DC–8 GHz broadband operation | Enables single-component replacement across L-, S-, C-, and lower X-band applications without redesign |
| Negative-voltage control interface | Supports direct integration with GaAs-compatible drivers and eliminates need for positive-to-negative level shifters in legacy designs |
| MSOP-8 surface-mount package | 14.8 mm² footprint with exposed thermal paddle reduces board area vs. SOIC while improving RF grounding |
| High linearity (IP3 = 36 dBm) | Minimizes intermodulation distortion in multi-carrier CATV and WiMAX systems |
Applications
| CATV Distribution Amplifier | Wireless LAN Access Point Front-End |
|---|---|
Use Scenario: Signal path selection between upstream/downstream channels in hybrid fiber-coax nodes. IC Role / Device Role / Timing Role: Non-reflective SPDT switch routing RF input between bidirectional amplifier stages. Use Value: 45 dB isolation at 6 GHz prevents ingress noise coupling; DC coupling supports return-path baseband signaling. | Use Scenario: Antenna switching between 2.4 GHz and 5 GHz bands in dual-band AP radios. IC Role / Device Role / Timing Role: High-speed RF path selector enabling dynamic band allocation without RF choke insertion. Use Value: 20 ns switching time allows sub-50 ns TDD guard intervals; 1.2 dB loss preserves EVM margin. |
| MMDS Subscriber Unit | Wireless Local Loop Base Station |
Use Scenario: Transmit/receive path isolation in 2.5 GHz licensed broadband subscriber terminals. IC Role / Device Role / Timing Role: Non-reflective switch isolating PA output from LNA input during TDD burst transmission. Use Value: 37 dB isolation at 6 GHz meets FCC spectral mask requirements; 23 dBm P1dB handles peak PA output. | Use Scenario: Diversity receive path selection in fixed wireless base stations operating at 3.5 GHz. IC Role / Device Role / Timing Role: Low-loss RF switch selecting between two spatially separated antennas. Use Value: 14 dB on-state return loss ensures stable VSWR across temperature; MSOP-8 simplifies high-density layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC284MS8G | DC–3.5 GHz bandwidth; higher isolation (50 dB @ 2 GHz); same MSOP-8 package and –5 V/0 V control | Optimized for sub-4 GHz infrastructure where extended bandwidth is unnecessary | Select HMC284MS8G when system bandwidth ≤3.5 GHz and maximum isolation is prioritized over frequency range |
| Qorvo QM11036 | DC–6 GHz; 0.9 dB insertion loss @ 2 GHz; +3.3 V control; 2.0 × 2.0 mm DFN package | Targets space-constrained mobile and IoT designs requiring positive logic and smaller footprint | Select QM11036 when +3.3 V logic compatibility and 4 mm² board area reduction outweigh 2 GHz bandwidth gap |
Compared with HMC270MS8G, HMC284MS8G trades 4.5 GHz upper-frequency capability for higher isolation below 3.5 GHz, while QM11036 sacrifices 2 GHz bandwidth and negative control for compact size and CMOS logic compatibility-making HMC270MS8G optimal for wideband infrastructure needing DC coupling and proven 8 GHz performance.
Availability
HMC270MS8G is available at Aetrix Electronics and suitable for CATV headend equipment, wireless LAN access points, MMDS subscriber units, and wireless local loop base stations requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for HMC270MS8G 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
Hittite Microwave Corporation was a U.S.-based RF/microwave semiconductor company specializing in high-performance GaAs and SiGe MMICs, acquired by Analog Devices in 2014.
The HMC270MS8G belongs to Hittite's broadband non-reflective switch product line, designed specifically for infrastructure-grade RF signal routing where DC coupling, wide instantaneous bandwidth, and high isolation are mandatory.
FAQ
What is the control voltage requirement for reliable operation of the HMC270MS8G?
The HMC270MS8G requires a dual-rail negative control interface: Logic high is –5 V ±0.5 V (35 µA typical), and logic low is 0 to –0.2 V (10 µA typical). DC blocking capacitors are recommended unless RFC, RF1, and RF2 are held below 100 mV DC potential. This ensures correct state activation and avoids latch-up in GaAs pHEMT circuitry. The HMC270MS8G does not support positive-only control voltages.
Can the HMC270MS8G be used in DC-coupled applications?
Yes, the HMC270MS8G supports true DC-coupled operation due to its non-reflective architecture and internal biasing. RFC, RF1, and RF2 ports are DC-coupled, enabling baseband and low-frequency RF routing without external bias tees. However, DC blocking capacitors are advised unless all RF ports remain below 100 mV DC potential. The HMC270MS8G has been validated down to 0 Hz in evaluation setups per its datasheet v04.0607.
What is the maximum RF input power the HMC270MS8G can handle continuously?
The HMC270MS8G has an absolute maximum RF input power rating of +24 dBm (250 mW) when Vctl = –5 V. For linear operation, its P1dB is 23 dBm across 0.5–8 GHz, meaning it delivers full small-signal gain up to ~200 mW CW input. Operation above P1dB causes measurable gain compression; sustained input >+24 dBm risks permanent damage. The HMC270MS8G must not be "hot-switched" above +13 dBm per datasheet guidance.
How does the non-reflective design of the HMC270MS8G improve system-level RF performance?
The non-reflective design terminates both RF1 and RF2 ports in 50 Ω when off, preventing signal reflections that cause standing waves, group delay ripple, and VSWR degradation during switching transients. This maintains impedance continuity across the entire DC–8 GHz band, reducing passband distortion in sensitive receivers and improving adjacent-channel rejection in transmitters. The HMC270MS8G achieves this without external termination resistors, simplifying layout versus reflective switches.
Is the HMC270MS8G pin-compatible with the HMC270MS8GE variant?
Yes, the HMC270MS8G and HMC270MS8GE share identical pinout, electrical specifications, and MSOP-8 mechanical outline. The only difference is RoHS compliance: HMC270MS8GE uses 100% matte tin lead finish and 260 °C peak reflow, while HMC270MS8G uses Sn/Pb and 235 °C reflow. Both operate identically in-circuit; the HMC270MS8G remains fully functional in legacy Pb-containing assembly lines.
107949-HMC270MS8G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bag
- Product Status:
- Obsolete
- Type:
- Switch, SPDT
- Frequency:
- 0Hz ~ 8GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC270MS8G
107949-HMC270MS8G FAQ
1.How can I place an order for 107949-HMC270MS8G through Aetrix?
Please submit a Request for Quotation (RFQ) for 107949-HMC270MS8G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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5.How can I obtain technical support or documentation for 107949-HMC270MS8G?
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6.How does Aetrix verify that 107949-HMC270MS8G is sourced from the original manufacturer or authorized distributors?
All 107949-HMC270MS8G 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 107949-HMC270MS8G meets industry standards.
7.What is the process for return or replacement of 107949-HMC270MS8G?
All 107949-HMC270MS8G units undergo pre-shipment inspection (PSI). If there is an issue with 107949-HMC270MS8G, 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 107949-HMC270MS8G part is unused and in its original packaging.
Return procedure for 107949-HMC270MS8G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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