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Analog Devices Inc. 119197-HMC658LP2
- Part No.:
- 119197-HMC658LP2
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
119197-HMC658LP2.pdf
- Description:
- BOARD EVAL HMC658LP2E
- Quantity:
- Payment:
- Shipping:
Inventory:1,827
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Product details
Overview
HMC658LP2 from Analog Devices (formerly Hittite Microwave) is a 20 dB wideband fixed attenuator IC for RF/microwave signal conditioning in 50 Ω systems, operating from DC to 25 GHz with ±2.0 dB attenuation tolerance, 7 dB minimum return loss, and +25 dBm CW power handling - deployed in fiber optics transceivers and microwave radio front-ends.
For engineers reviewing the HMC658LP2 datasheet, HMC658LP2 pinout, HMC658LP2 application, or HMC658LP2 equivalent, key selection criteria include broadband flatness, VSWR stability across 25 GHz, RoHS-compliant 2×2 mm SMT package compatibility, and DC-coupled 50 Ω RF port interface requirements.
Technical Context
This passive SMT attenuator uses a monolithic thin-film resistive network integrated into a low-stress injection-molded plastic package with exposed ground paddle. It provides matched 50 Ω input/output impedance without internal biasing, requiring external DC blocking capacitors only when signal DC offset exceeds ±0.5 V.
Designed for surface-mount reflow (MSL1, 260 °C peak), the device maintains stable attenuation vs. temperature (0.0004 dB/°C typical) and supports continuous-wave RF operation from –40 °C to +85 °C ambient, with Class 1B ESD sensitivity requiring grounded handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Attenuation | 20 dB ±2.0 dB over DC–25 GHz - ensures predictable signal reduction in wideband test setups and optical receiver chains |
| Frequency Range | DC to 25 GHz - supports full C-, X-, Ku-, and K-band operation without roll-off |
| Return Loss | Min. 7 dB (typ. 12 dB) - guarantees <1.5 VSWR across band, minimizing reflection-induced distortion |
| Power Handling | +25 dBm CW - enables use in medium-power transmitter output stages and lab signal generators |
| Temp. Coefficient | 0.0004 dB/°C - limits attenuation drift to <0.1 dB over full –40 °C to +85 °C operating range |
| Package Size | 2 mm × 2 mm × 0.85 mm - fits high-density RF PCB layouts with minimal board area impact |
Pinout & Package
6-lead 2×2 mm SMT package with exposed thermal/RF ground paddle; RoHS-compliant matte tin lead finish; MSL1 rating (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 6 | GND | RF/DC ground terminals - must be soldered directly to PCB ground plane for impedance control and thermal dissipation |
| 2 | RF1 | DC-coupled 50 Ω input port - accepts baseband through K-band signals; requires external DC blocking if input DC offset ≠ 0 V |
| 5 | RF2 | DC-coupled 50 Ω output port - delivers attenuated signal with matched termination; same DC coupling constraints as RF1 |
Key Features
| Feature | Design Value |
|---|---|
| Wideband flatness | ±0.5 dB variation over DC–20 GHz - preserves modulation integrity in QPSK/QAM RF links |
| Input/output match | Typical 12 dB return loss - reduces standing waves in cascaded filter-amplifier chains |
| Thermal stability | 0.0004 dB/°C tempco - enables uncalibrated operation in outdoor base stations with ambient swings |
| SMT manufacturability | MSL1, 260 °C compatible - supports standard lead-free reflow without derating or special profiling |
Applications
| Fiber Optic Transceiver Modules | Microwave Radio Front-Ends |
|---|---|
Use Scenario: Signal level adjustment between laser driver and TIA in 10G/25G SFP+ modules. IC Role / Device Role / Timing Role: Passive 20 dB attenuation stage placed before limiting amplifier to prevent saturation. Use Value: Maintains 50 Ω impedance continuity while reducing peak RF amplitude by exact 20 dB, enabling dynamic range optimization without added noise. | Use Scenario: Inter-stage isolation in point-to-point 18–24 GHz backhaul radios. IC Role / Device Role / Timing Role: Fixed loss element between PA output and mixer input to improve LO leakage suppression. Use Value: Delivers consistent 20 dB loss up to 25 GHz, ensuring stable gain compression margin and preventing mixer overload under varying temperature. |
| Test & Measurement Instrumentation | Scientific RF Instrumentation |
Use Scenario: Calibration path attenuation in vector network analyzer (VNA) receiver channels. IC Role / Device Role / Timing Role: Precision reference attenuator in internal calibration loop for S-parameter accuracy. Use Value: ±2.0 dB tolerance and <0.1 dB tempco ensure traceable loss values across frequency sweep and ambient changes. | Use Scenario: Signal conditioning in pulsed radar receiver protection circuits. IC Role / Device Role / Timing Role: Front-end attenuator before LNA to handle high-PAPR waveforms without compression. Use Value: +25 dBm CW rating and DC–25 GHz bandwidth allow safe handling of nanosecond RF pulses with minimal group delay distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qorvo QAT-20W25 | 20 dB ±1.2 dB, DC–26.5 GHz, 0.0003 dB/°C tempco, 2.0×2.0×0.9 mm | Higher bandwidth and tighter tolerance; slightly larger height | Preferred for millimeter-wave test fixtures requiring sub-1 dB uncertainty |
| Mini-Circuits VAT-20W2+ | 20 dB ±0.75 dB, DC–20 GHz, +30 dBm power handling, 2.5×2.5×0.9 mm | Narrower bandwidth but higher power rating and looser tolerance | Better suited for high-power IF stages where 25 GHz reach is unnecessary |
Compared with QAT-20W25 and VAT-20W2+, the HMC658LP2 offers optimal balance of 25 GHz coverage, 20 dB precision, and compact 2×2 mm footprint - making it ideal for space-constrained microwave radios and optical modules where bandwidth and size are primary constraints.
Availability
HMC658LP2 is available at Aetrix Electronics and suitable for fiber optic transceivers, microwave radio front-ends, and test & measurement instrumentation requiring stable component supply, tight attenuation tolerance, and DC–25 GHz performance.
Supply support for HMC658LP2 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 is a global semiconductor leader specializing in high-performance analog, mixed-signal, and RF technologies, acquired Hittite Microwave in 2014 to strengthen its microwave and millimeter-wave portfolio.
The HMC658LP2 belongs to the Hittite-origin wideband fixed attenuator product line, engineered specifically for DC–25 GHz RF signal conditioning in defense, aerospace, and high-speed communications infrastructure.
FAQ
What is the maximum RF input power rating for the HMC658LP2?
The HMC658LP2 has an absolute maximum RF input power rating of +25 dBm continuous wave (CW) at 25 °C ambient. Operation above this level risks irreversible degradation of the thin-film resistor network. Derating is required above +70 °C case temperature per Analog Devices' reliability guidelines, and pulsed operation must remain within average power limits to avoid thermal runaway.
Does the HMC658LP2 require DC blocking capacitors in all applications?
The HMC658LP2 features DC-coupled RF ports (pins 2 and 5), so DC blocking capacitors are required only when the connected circuitry imposes non-zero DC voltage on either port - for example, when interfacing with biased amplifiers or mixers. In AC-coupled systems such as SMA-terminated test fixtures, external capacitors may be omitted, but ground paddle soldering remains mandatory for RF performance.
What is the meaning of "MSL1" for the HMC658LP2 package?
MSL1 (Moisture Sensitivity Level 1) indicates the HMC658LP2 is not moisture-sensitive and may be stored indefinitely at ≤30 °C/60% RH without dry-pack requirements. It withstands standard lead-free reflow profiles with a peak temperature of 260 °C, eliminating bake-out steps and supporting direct placement into high-volume SMT lines without handling restrictions beyond standard ESD precautions.
How does the HMC658LP2's attenuation tolerance behave over temperature?
The HMC658LP2's attenuation tolerance of ±2.0 dB is specified over the full operating temperature range (–40 °C to +85 °C), not just at +25 °C. Its typical temperature coefficient of 0.0004 dB/°C means total drift remains under ±0.1 dB across the entire range - verified via production testing and included in the datasheet's "Attenuation vs. Temperature" plot on page 12-2.
Can the HMC658LP2 be used in impedance-mismatched circuits?
The HMC658LP2 is designed exclusively for 50 Ω systems and assumes matched source/load impedances. Using it in mismatched environments (e.g., 75 Ω video or arbitrary-impedance PCB traces) degrades return loss, increases insertion loss uncertainty, and may cause standing-wave heating. For non-50 Ω applications, custom attenuators or impedance-transforming networks must be used - the HMC658LP2 itself does not provide impedance conversion.
119197-HMC658LP2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Attenuator
- Frequency:
- 0Hz ~ 25GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC658LP2
119197-HMC658LP2 FAQ
1.How can I place an order for 119197-HMC658LP2 through Aetrix?
Please submit a Request for Quotation (RFQ) for 119197-HMC658LP2 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 119197-HMC658LP2 reliable?
The price and inventory of 119197-HMC658LP2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 119197-HMC658LP2 is usually 5 days.
3.What payment methods are accepted for 119197-HMC658LP2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 119197-HMC658LP2 transactions.
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4.How is shipping managed for 119197-HMC658LP2?
119197-HMC658LP2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 119197-HMC658LP2 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 119197-HMC658LP2?
For technical support, including 119197-HMC658LP2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 119197-HMC658LP2 requirements.
6.How does Aetrix verify that 119197-HMC658LP2 is sourced from the original manufacturer or authorized distributors?
All 119197-HMC658LP2 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 119197-HMC658LP2 meets industry standards.
7.What is the process for return or replacement of 119197-HMC658LP2?
All 119197-HMC658LP2 units undergo pre-shipment inspection (PSI). If there is an issue with 119197-HMC658LP2, 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 119197-HMC658LP2 part is unused and in its original packaging.
Return procedure for 119197-HMC658LP2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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