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Analog Devices Inc. 119197-HMC654LP2E
- Part No.:
- 119197-HMC654LP2E
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
119197-HMC654LP2E.pdf
- Description:
- BOARD EVAL HMC654LP2E
- Quantity:
- Payment:
- Shipping:
Inventory:3,146
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Product details
Overview
HMC654LP2E from Analog Devices (formerly Hittite Microwave) is a wideband 4 dB fixed-value SMT attenuator operating from DC to 25 GHz in a 6-lead 2×2 mm QFN package, delivering ±0.5 dB attenuation tolerance over temperature, 20.5 dB typical return loss, and +25 dBm RF input power handling - deployed in microwave radio front-ends and test instrumentation signal conditioning paths.
For engineers reviewing the HMC654LP2E datasheet, HMC654LP2E pinout, HMC654LP2E application, or HMC654LP2E equivalent, key selection criteria include broadband flatness (DC–25 GHz), 50 Ω impedance match, thermal stability (0.0006 dB/°C), RoHS-compliant MSL1 packaging, and compatibility with high-volume SMT assembly for RF subsystems requiring precise signal level control.
Technical Context
This passive 50 Ω matched attenuator uses monolithic thin-film construction on low-stress molded plastic substrate to achieve flat frequency response and minimal VSWR variation across DC–25 GHz. Its symmetrical RF path (pins 2 and 5) supports bidirectional operation without performance degradation.
Designed for RF signal conditioning in high-frequency analog chains, it requires direct soldering of all ground leads (pins 1,3,4,6) and the exposed paddle to PCB RF ground per Hittite Application Note land pattern guidance - no internal bias or control logic is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Attenuation | 4 dB ±0.5 dB over full temperature range - ensures predictable signal reduction in calibration-critical paths |
| Frequency Range | DC to 25 GHz - supports baseband through Ka-band applications without roll-off |
| Return Loss (Typ.) | 20.5 dB at +25°C - minimizes reflected energy and maintains source/load match integrity |
| Power Handling | +25 dBm CW - enables use in medium-power transmitter output stages and receiver AGC loops |
| Temp. Coefficient | 0.0006 dB/°C - guarantees <±0.03 dB drift over −40°C to +85°C operating range |
| Package Size | 2 mm × 2 mm × 0.85 mm - fits dense RF module layouts while enabling thermal dissipation via ground paddle |
Pinout & Package
6-lead 2×2 mm QFN package with exposed thermal paddle; RoHS-compliant matte tin lead finish; MSL1 rating (peak reflow 260°C); copper alloy leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 6 | GND | RF/DC ground connection points - must be soldered directly to PCB ground plane for impedance control and thermal management |
| 2 | RF1 | 50 Ω DC-coupled input port - accepts non-zero DC bias; requires external blocking capacitor if DC isolation needed |
| 5 | RF2 | 50 Ω DC-coupled output port - bidirectionally identical to RF1; symmetric insertion loss and return loss |
Key Features
| Feature | Design Value |
|---|---|
| Wideband flatness | ±0.2 dB variation across DC–25 GHz - eliminates frequency-dependent gain error in wideband receivers |
| Thermal stability | 0.0006 dB/°C coefficient - sustains calibrated attenuation accuracy in unregulated outdoor enclosures |
| High-power survivability | +25 dBm continuous wave rating - accommodates pulsed radar IF stages and lab-grade signal generator outputs |
| SMT manufacturability | MSL1 260°C peak reflow compatibility - integrates seamlessly into standard high-volume RF assembly lines |
Applications
| Fiber Optic Transceiver Calibration | Microwave Radio Link Testing |
|---|---|
Use Scenario: Attenuating optical receiver TIA output signals prior to ADC sampling to prevent clipping during dynamic range characterization. IC Role / Device Role / Timing Role: Passive signal-level conditioner placed between transimpedance amplifier and digitizer in lab-grade optical test setups. Use Value: 4 dB attenuation with <±0.2 dB flatness preserves SNR integrity across 10–25 GHz OIF CEI channels. | Use Scenario: Simulating path loss in point-to-point E-band (71–76 GHz) radio link validation using downconverted IF signals. IC Role / Device Role / Timing Role: Fixed-loss element inserted between vector signal analyzer and DUT to emulate real-world propagation loss. Use Value: 20.5 dB return loss prevents measurement uncertainty from mismatch-induced ripple in swept-frequency tests. |
| Military Radar Front-End Protection | Scientific Instrument Signal Conditioning |
Use Scenario: Isolating sensitive LNA inputs from high-power transmit leakage in T/R modules during pulse radar operation. IC Role / Device Role / Timing Role: Bidirectional protection attenuator placed at antenna switch output to limit coupled TX energy entering RX chain. Use Value: +25 dBm power handling withstands transient coupling events without parametric shift or damage. | Use Scenario: Scaling high-amplitude sensor outputs (e.g., plasma diagnostics, particle detectors) to match oscilloscope input ranges. IC Role / Device Role / Timing Role: Precision amplitude scaler in ultra-low-noise analog signal chains where active gain introduces distortion. Use Value: DC-coupled 50 Ω interface enables sub-nanosecond pulse fidelity without capacitive droop or settling delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC653LP2E | 3 dB nominal attenuation (vs. 4 dB), same package, identical bandwidth and return loss specs | Used where lower insertion loss is required in cascaded filter/amp chains to preserve system NF | Select when 1 dB less attenuation meets system budget and tighter tolerance (±0.5 dB) remains critical |
| QAT-4W+ (Mini-Circuits) | 4 dB nominal, DC–20 GHz bandwidth (vs. DC–25 GHz), larger 3.2×2.5 mm package, ±0.7 dB tolerance | Preferred in cost-sensitive industrial systems where 5 GHz bandwidth margin is expendable | Choose for legacy designs already using Mini-Circuits land patterns or where extended Ka-band coverage is unnecessary |
Compared with HMC654LP2E, HMC653LP2E offers identical form-factor and precision but reduced attenuation for noise-figure-sensitive cascades, while QAT-4W+ trades bandwidth and tolerance for broader distributor availability and lower unit cost in non-military programs.
Availability
HMC654LP2E is available at Aetrix Electronics and suitable for fiber optic transceivers, microwave radio test sets, and military radar front-ends requiring stable component supply across extended temperature ranges and high-frequency signal integrity.
Supply support for HMC654LP2E 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 for precision signal processing.
HMC654LP2E belongs to the Hittite Microwave fixed attenuator product line - acquired by Analog Devices in 2014 - engineered specifically for broadband RF/microwave systems demanding flat, stable, and repeatable attenuation from DC through millimeter-wave bands.
FAQ
What is the maximum RF input power rating for HMC654LP2E?
HMC654LP2E is rated for +25 dBm continuous wave RF input power at +25°C ambient. Absolute maximum ratings specify +25 dBm at +85°C and +27 dBm at −40°C per the datasheet's Absolute Maximum Ratings table. Exceeding these limits risks permanent parameter shift or failure. Derating is recommended for sustained operation above +70°C ambient.
Is HMC654LP2E bidirectional, and does directionality affect its attenuation value?
Yes, HMC654LP2E is fully bidirectional: attenuation, return loss, and frequency response are identical whether RF signal flows from pin 2 to pin 5 or pin 5 to pin 2. The device contains no internal diodes or asymmetric elements - its 50 Ω matched design ensures symmetrical performance, confirmed by measured S21/S12 data in the HMC654LP2E datasheet.
Does HMC654LP2E require DC blocking capacitors in circuit?
HMC654LP2E is DC-coupled on both RF ports (pins 2 and 5), so external DC blocking capacitors are only required if the connected source or load presents non-zero DC potential that could disrupt bias points. When interfacing with AC-coupled stages or biased amplifiers, designers must add series capacitors - the device itself imposes no DC path limitation.
What is the recommended PCB land pattern for HMC654LP2E?
Hittite Application Note AN-119197 specifies the recommended land pattern for HMC654LP2E: symmetric 2×2 mm pads for pins 1–6 plus an exposed center thermal pad connected to solid RF ground. All ground pins and the paddle must be soldered to minimize inductance; trace impedance at RF ports must be maintained at 50 Ω. The evaluation board 119194 implements this layout using Rogers 4350 substrate.
How does the temperature coefficient impact HMC654LP2E performance in outdoor deployments?
With a typical temperature coefficient of 0.0006 dB/°C, HMC654LP2E exhibits <±0.03 dB total attenuation drift over its full −40°C to +85°C operating range. This stability ensures calibration validity in unheated outdoor enclosures used for 5G backhaul radios or satellite ground stations where ambient swings exceed 60°C daily.
119197-HMC654LP2E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Type:
- Attenuator
- Frequency:
- 0Hz ~ 25GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC654LP2E
119197-HMC654LP2E FAQ
1.How can I place an order for 119197-HMC654LP2E through Aetrix?
Please submit a Request for Quotation (RFQ) for 119197-HMC654LP2E 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-HMC654LP2E reliable?
The price and inventory of 119197-HMC654LP2E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 119197-HMC654LP2E is usually 5 days.
3.What payment methods are accepted for 119197-HMC654LP2E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 119197-HMC654LP2E transactions.
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4.How is shipping managed for 119197-HMC654LP2E?
119197-HMC654LP2E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 119197-HMC654LP2E 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-HMC654LP2E?
For technical support, including 119197-HMC654LP2E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 119197-HMC654LP2E requirements.
6.How does Aetrix verify that 119197-HMC654LP2E is sourced from the original manufacturer or authorized distributors?
All 119197-HMC654LP2E 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-HMC654LP2E meets industry standards.
7.What is the process for return or replacement of 119197-HMC654LP2E?
All 119197-HMC654LP2E units undergo pre-shipment inspection (PSI). If there is an issue with 119197-HMC654LP2E, 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-HMC654LP2E part is unused and in its original packaging.
Return procedure for 119197-HMC654LP2E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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