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Analog Devices Inc. 105786-HMC437MS8G
- Part No.:
- 105786-HMC437MS8G
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
105786-HMC437MS8G.pdf
- Description:
- BOARD EVAL HMC437MS8GE
- Quantity:
- Payment:
- Shipping:
Inventory:1,962
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Product details
Overview
HMC437MS8G from Analog Devices (formerly Hittite Microwave) is a GaAs HBT static frequency divider IC performing fixed divide-by-3 operation, operating from DC (square-wave input) to 7 GHz input frequency with +5 V supply, delivering -1 dBm output power and -153 dBc/Hz SSB phase noise at 100 kHz offset-used in prescaler stages of C-band PLLs for VSAT radios and 802.11a WLAN infrastructure.
For engineers reviewing the HMC437MS8G datasheet, HMC437MS8G pinout, HMC437MS8G application, or HMC437MS8G equivalent, key selection criteria include its DC–7 GHz input bandwidth, differential RF input capability, low additive phase noise, single-supply operation, and MS8G surface-mount package compatibility with RF PCB layout best practices.
Technical Context
The HMC437MS8G implements a static logic-based divide-by-3 function using InGaP GaAs HBT technology, enabling deterministic division without feedback loops or programmable control. It supports both single-ended and differential RF input configurations, with pins 2 and 3 serving as complementary inputs.
Its output stage delivers two complementary divided signals at pins 6 and 7, with 100 ps transition time at 882 MHz and reverse leakage below -50 dBm when both outputs are terminated-critical for minimizing feedthrough and maintaining signal integrity in high-frequency prescaler chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Division Ratio | Fixed divide-by-3 - provides deterministic frequency reduction without configuration overhead or lock time. |
| Input Frequency Range | DC to 7 GHz (square wave) / 0.1–7.5 GHz (sine wave) - supports wideband prescaling across C-band and UNII bands. |
| Output Power | -1 dBm typical - sufficient to drive subsequent MMIC amplifiers or mixer LO ports without intermediate gain stages. |
| SSB Phase Noise | -153 dBc/Hz @ 100 kHz offset (Fin = 6 GHz, Pin = 0 dBm) - preserves system EVM and adjacent channel rejection in transceivers. |
| Supply Current | 69 mA @ +5 V - enables low-power RF subsystem design with minimal thermal load on PCB ground plane. |
| Operating Temperature | -40 °C to +85 °C - qualified for outdoor wireless infrastructure and industrial-grade RF modules. |
| Input Power Range | -12 to +12 dBm (1–6 GHz), -10 to +10 dBm (6–7 GHz) - accommodates variable-level sources without external attenuation or amplification. |
Pinout & Package
Package: MS8G - 8-lead surface-mount plastic package with exposed ground paddle; RoHS-compliant variant (HMC437MS8GE) uses matte Sn finish and MSL1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vcc | +5 V ± 0.25 V supply rail; requires local 4.7 µF tantalum and 100 pF RF bypassing per evaluation board guidelines. |
| 2 | IN | Primary RF input; must be DC-blocked; used for single-ended operation or in-phase input in differential mode. |
| 3 | IN | Secondary RF input; 180° out-of-phase with pin 2 for differential drive; AC-grounded in single-ended use. |
| 4, 5 | GND | RF/DC ground terminals; must be soldered directly to PCB ground plane with multiple vias for low-inductance return path. |
| 6 | OUT | Complementary divided output; 180° out-of-phase with pin 7; enables balanced clock distribution or I/Q generation. |
| 7 | OUT | Main divided output; provides square-wave output at Fin/3; matched to 50 Ω system impedance. |
| 8 | N/C | No internal connection; externally grounded per evaluation circuit to minimize parasitic coupling and improve RF stability. |
Key Features
| Feature | Design Value |
|---|---|
| DC-coupled square-wave input support | Enables direct interface with digital logic or FPGA clock outputs without AC coupling constraints. |
| Differential RF input architecture | Improves common-mode noise rejection and reduces spurious feedthrough in dense RF layouts. |
| Low additive phase noise (-153 dBc/Hz) | Maintains spectral purity in PLL feedback paths, critical for meeting FCC spectral mask requirements. |
| Exposed ground paddle thermal path | 101.5 °C/W junction-to-ground thermal resistance enables stable operation up to +85 °C ambient. |
| ESD robustness (HBM Class 1A) | Supports automated SMT assembly without special handling beyond standard ESD protocols. |
Applications
| VSAT Radio Prescalers | 802.11a WLAN Transceivers |
|---|---|
Use Scenario: Used in the reference oscillator chain of Ku-band VSAT outdoor units to reduce VCO frequency before phase detection. IC Role / Device Role / Timing Role: Fixed-ratio prescaler providing clean, low-noise divided clock to PLL phase detector. Use Value: Enables stable 10.7–12.75 GHz LO synthesis with <1° RMS jitter accumulation over temperature. |
Use Scenario: Integrated into 5 GHz band radio front-ends for enterprise access points requiring precise channel spacing. IC Role / Device Role / Timing Role: Frequency divider generating accurate 1.667 GHz clock from 5 GHz VCO for ADC/DAC sampling and digital baseband timing. Use Value: Delivers -153 dBc/Hz phase noise floor to meet IEEE 802.11a EVM ≤3% at 54 Mbps. |
| Fiber Optic Transmitter Clocking | Cellular Infrastructure Synthesizers |
Use Scenario: Employed in 2.5 Gbps/10 Gbps SFP+ optical module clock recovery circuits to derive lower-rate control clocks. IC Role / Device Role / Timing Role: Static divider producing stable sub-harmonic clocks for SerDes alignment and monitoring logic. Use Value: Provides deterministic 1.25 GHz or 3.125 GHz clocks with <100 ps edge jitter for precise data eye positioning. |
Use Scenario: Embedded in macrocell BTS synthesizer modules for 3G UMTS FDD band (2110–2170 MHz) LO generation. IC Role / Device Role / Timing Role: Prescaler in integer-N PLL loop reducing 6.33–6.51 GHz VCO output to ~2.11 GHz for comparison. Use Value: Supports fast frequency hopping with no relock delay, meeting 3GPP TS 25.104 switching time <150 µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar frequency divider applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC363S8G | Divide-by-2, 0.1–8 GHz input, -152 dBc/Hz phase noise @ 100 kHz, same MS8G package. | Lacks divide-by-3 ratio; suitable only where halving-not thirding-is acceptable in PLL feedback path. | Select when system architecture allows division by 2 and higher output power (+1 dBm) is preferred. |
| HMC492LP5E | Divide-by-4, 0.1–13 GHz input, -150 dBc/Hz phase noise, 32-lead QFN package. | Higher input bandwidth and different division ratio; incompatible pinout and thermal profile. | Choose for millimeter-wave systems requiring >7 GHz input range and tighter board-level integration via smaller pitch. |
Compared with HMC363S8G and HMC492LP5E, the HMC437MS8G uniquely satisfies fixed divide-by-3 requirements in C-band infrastructure with optimal phase noise and legacy-compatible MS8G footprint-making it irreplaceable where ratio fidelity and package interchangeability are mandatory.
Availability
HMC437MS8G is available at Aetrix Electronics and suitable for VSAT radios, 802.11a access points, fiber optic transceivers, and cellular infrastructure equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for HMC437MS8G 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 MMIC portfolio, specializing in GaAs and GaN solutions for defense, communications, and test instrumentation markets.
The HMC437MS8G belongs to Hittite's legacy SMT GaAs HBT MMIC frequency divider family, engineered specifically for low-phase-noise prescaling in wireless infrastructure PLLs where deterministic division and wideband operation are essential.
FAQ
What is the maximum input frequency supported by the HMC437MS8G?
The HMC437MS8G supports a maximum input frequency of 7.5 GHz under typical conditions, with guaranteed operation up to 7.0 GHz across temperature and voltage. This specification applies to sine-wave inputs; with square-wave drive, the device operates down to DC-making it suitable for digital clock domain interfacing in mixed-signal RF systems.
Does the HMC437MS8G require external DC blocking capacitors?
Yes, the HMC437MS8G requires external DC blocking capacitors at both RF input (pins 2 and 3) and RF output (pins 6 and 7) ports. The capacitor value must be selected based on the lowest operating frequency-typically 100 pF for 1 GHz+ applications-as specified in the evaluation board design and absolute maximum ratings section of the HMC437MS8G datasheet.
Can the HMC437MS8G operate with differential input signals?
Yes, the HMC437MS8G supports true differential RF input operation using pins 2 and 3, which are 180° out of phase. When driven differentially, the device achieves improved common-mode rejection and reduced even-order harmonics-key for minimizing spurs in sensitive receiver and synthesizer applications where the HMC437MS8G is deployed.
What is the thermal resistance and maximum junction temperature of the HMC437MS8G?
The HMC437MS8G has a junction-to-ground paddle thermal resistance of 101.5 °C/W and is rated for a maximum junction temperature of 135 °C to maintain 1 million hour MTTF. At +85 °C ambient and 69 mA supply current, the calculated junction temperature remains within safe limits when the ground paddle is properly soldered to a multi-via PCB ground plane.
Is the HMC437MS8G pin-compatible with the HMC437MS8GE variant?
Yes, the HMC437MS8G and HMC437MS8GE share identical pinout, electrical specifications, and mechanical outline-differing only in lead finish (Sn/Pb vs. 100% matte Sn) and MSL rating (both MSL1). The HMC437MS8GE is RoHS-compliant and supports peak reflow up to 260 °C, while the HMC437MS8G is rated for 235 °C, but both are drop-in replacements in compatible assembly processes.
105786-HMC437MS8G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Type:
- Prescaler
- Frequency:
- 0Hz ~ 7GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC437MS8G
105786-HMC437MS8G FAQ
1.How can I place an order for 105786-HMC437MS8G through Aetrix?
Please submit a Request for Quotation (RFQ) for 105786-HMC437MS8G 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 105786-HMC437MS8G reliable?
The price and inventory of 105786-HMC437MS8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 105786-HMC437MS8G is usually 5 days.
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Once your 105786-HMC437MS8G 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 105786-HMC437MS8G?
For technical support, including 105786-HMC437MS8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 105786-HMC437MS8G requirements.
6.How does Aetrix verify that 105786-HMC437MS8G is sourced from the original manufacturer or authorized distributors?
All 105786-HMC437MS8G 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 105786-HMC437MS8G meets industry standards.
7.What is the process for return or replacement of 105786-HMC437MS8G?
All 105786-HMC437MS8G units undergo pre-shipment inspection (PSI). If there is an issue with 105786-HMC437MS8G, 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 105786-HMC437MS8G part is unused and in its original packaging.
Return procedure for 105786-HMC437MS8G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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