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Analog Devices Inc. HMC654LP2ETR
- Part No.:
- HMC654LP2ETR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Attenuators
- Package:
- 6-TDFN Exposed Pad
- Datasheet:
-
HMC654LP2ETR.pdf
- Description:
- RF ATTENUATOR 4DB 50OHM 6VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,518
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Product details
Overview
HMC654LP2ETR from Analog Devices (formerly Hittite Microwave) is a 4 dB wideband fixed attenuator IC designed for RF signal conditioning in high-frequency analog signal paths. It operates from DC to 25 GHz, delivers ±0.5 dB attenuation tolerance over temperature, maintains ≥7.0 dB minimum return loss, and handles +25 dBm CW input power - enabling precise gain control in microwave radio front-ends.
For engineers reviewing the HMC654LP2ETR datasheet, HMC654LP2ETR pinout, HMC654LP2ETR application, or HMC654LP2ETR equivalent, key selection criteria include its 2×2 mm SMT package footprint, 50 Ω matched RF ports, flat frequency response up to 25 GHz, and Class 1A ESD rating for robust handling in test & measurement and aerospace assembly environments.
Technical Context
This passive 50 Ω attenuator uses thin-film resistive elements integrated into a low-stress molded plastic package with exposed ground paddle. Its DC-coupled RF ports (Pin 2 and Pin 5) require external DC blocking capacitors when interfacing with biased signal sources or loads.
The device achieves broadband performance via impedance-matched internal topology and symmetric layout, delivering stable 4 dB attenuation with ≤0.0006 dB/°C temperature coefficient and ≥20.5 dB typical return loss across DC–25 GHz - critical for minimizing VSWR-induced ripple in wideband receiver chains and calibration loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Attenuation | 4 dB ±0.5 dB over full temperature range - ensures predictable signal level reduction without recalibration. |
| Frequency Range | DC to 25 GHz - supports millimeter-wave applications including 5G FR2 and satellite communications. |
| Return Loss (Min) | ≥7.0 dB - guarantees minimal reflected energy at band edges, preserving source stability. |
| Input Power (CW) | +25 dBm - enables use in medium-power RF stages without thermal derating. |
| Temp. Coefficient | 0.0006 dB/°C - limits attenuation drift to <0.03 dB over −40°C to +85°C operating range. |
| ESD Rating | HBM Class 1A - requires strict handling per ESD-sensitive device protocols during SMT placement. |
Pinout & Package
6-lead 2×2 mm SMT package (4 mm² footprint) with exposed ground paddle; RoHS-compliant matte tin finish; MSL1 rating (peak reflow 260 °C). All ground leads and paddle must be soldered directly to PCB RF ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 6 | GND | RF/DC ground connection points - must be low-inductance soldered to solid ground plane for broadband return loss integrity. |
| 2 | RF1 | DC-coupled 50 Ω input port - requires external DC blocking capacitor if driven by biased source. |
| 5 | RF2 | DC-coupled 50 Ω output port - requires external DC blocking capacitor if feeding biased load. |
Key Features
| Feature | Design Value |
|---|---|
| Wideband flatness | ≤±0.3 dB variation from DC to 25 GHz - eliminates need for frequency-dependent correction in vector network analyzer calibration. |
| Matched 50 Ω ports | Typical return loss ≥20.5 dB - minimizes mismatch errors in cascaded RF modules and improves system-level VSWR. |
| High power handling | +25 dBm CW rating - supports operation in transmitter output stages and high-dynamic-range test fixtures. |
| Surface-mount compatibility | MSL1 260 °C peak reflow - enables integration into high-volume automated assembly lines without special process controls. |
Applications
| Fiber Optic Transceiver Calibration | Microwave Radio IF Chain |
|---|---|
Use Scenario: Attenuating reference signals in optical module TOSA/ROSA test jigs to simulate fiber path loss. IC Role / Device Role / Timing Role: Passive signal level setter between laser driver and photodiode amplifier. Use Value: 4 dB precision enables repeatable eye diagram margin testing across 10–28 Gbps data rates with <0.03 dB thermal drift. | Use Scenario: Setting gain distribution in point-to-point microwave backhaul radios operating at 18–23 GHz. IC Role / Device Role / Timing Role: Fixed-loss element in image-reject mixer interface networks. Use Value: DC–25 GHz bandwidth preserves modulation fidelity of QAM-1024 signals; 20.5 dB return loss prevents LO leakage degradation. |
| Military Radar Test Set | Scientific Instrument Signal Conditioning |
Use Scenario: Simulating antenna path loss in AESA radar maintenance test equipment. IC Role / Device Role / Timing Role: Stable RF loss block in pulse-modulated 10–18 GHz signal routing. Use Value: +25 dBm power handling accommodates high-PAPR radar pulses; Class 1A ESD rating ensures reliability during field depot handling. | Use Scenario: Level-setting before spectrum analyzer inputs in RF metrology labs. IC Role / Device Role / Timing Role: Precision attenuation stage in calibrated signal generator output paths. Use Value: ±0.5 dB tolerance and flat frequency response enable traceable NIST-level amplitude accuracy up to 25 GHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| QAT-4W+ (Mini-Circuits) | 4 dB ±0.6 dB tolerance; DC–20 GHz bandwidth; larger 3.2×2.5 mm package. | Limited to 20 GHz - unsuitable for Ka-band or 25 GHz test systems. | Select when cost sensitivity outweighs bandwidth requirement and board space permits larger footprint. |
| ATN4-03 (Pasternack) | 4 dB ±0.8 dB tolerance; DC–18 GHz; SMA connectorized, not SMT. | Requires mechanical mounting and RF cabling - incompatible with automated PCB assembly. | Choose only for lab bench prototyping where connector flexibility is prioritized over production integration. |
Compared with QAT-4W+ and ATN4-03, the HMC654LP2ETR provides superior bandwidth (DC–25 GHz), tighter attenuation tolerance (±0.5 dB), and true SMT manufacturability - making it the preferred choice for high-frequency embedded systems requiring repeatability, miniaturization, and thermal stability.
Availability
HMC654LP2ETR is available at Aetrix Electronics and suitable for fiber optics, microwave radio, and military & space applications requiring stable component supply, consistent RF performance, and long-term obsolescence management.
Supply support for HMC654LP2ETR 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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and RF technologies for precision signal processing.
The HMC654LP2ETR belongs to the former Hittite Microwave wideband passive attenuator product line, engineered specifically for DC–25 GHz instrumentation, defense EW systems, and high-speed communication infrastructure where flatness, repeatability, and SMT scalability are mandatory.
FAQ
What is the operating temperature range for the HMC654LP2ETR?
The HMC654LP2ETR operates reliably from −40°C to +85°C. Its attenuation remains within ±0.5 dB across this full range due to a low 0.0006 dB/°C temperature coefficient. This stability makes the HMC654LP2ETR suitable for outdoor microwave radios and avionics systems where ambient conditions vary widely. Thermal performance is verified per the manufacturer's absolute maximum ratings table.
Does the HMC654LP2ETR require DC blocking capacitors?
Yes, the HMC654LP2ETR has DC-coupled RF ports (Pins 2 and 5), so external DC blocking capacitors are required when either the driving source or loaded circuit has non-zero DC bias. Failure to do so may cause unintended current flow through the attenuator's internal resistive network, potentially degrading performance or reliability. The HMC654LP2ETR datasheet specifies this in the Pin Descriptions section.
Is the HMC654LP2ETR pin-compatible with other parts in the HMC652LP2E–HMC655LP2E family?
Yes, the HMC654LP2ETR shares identical 6-lead 2×2 mm SMT packaging, pinout, and land pattern with HMC652LP2E, HMC653LP2E, and HMC655LP2E. This allows drop-in replacement across 2 dB, 3 dB, 4 dB, and 6 dB attenuation values without PCB redesign - simplifying inventory management and design flexibility for RF system integrators using the HMC654LP2ETR.
What is the maximum RF input power rating for continuous wave operation of the HMC654LP2ETR?
The HMC654LP2ETR supports +25 dBm CW input power at +25°C ambient. Absolute maximum ratings specify +25 dBm for HMC654LP2E (matching the HMC654LP2ETR), with derating required above +25°C. This rating enables use in medium-power RF stages such as post-amplifier signal conditioning or test set signal routing where thermal management is controlled.
How is the HMC654LP2ETR marked on-package for identification?
The HMC654LP2ETR features a 3-digit lot code (NNN) and "XXX" placeholder marking on the top surface per the outline drawing. It does not carry full part number marking. Traceability relies on reel labeling and manufacturer documentation rather than visual package marking - consistent with industry practice for miniature passive SMT devices like the HMC654LP2ETR.
HMC654LP2ETR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 6-TDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Attenuation Value:
- 4dB
- Frequency Range:
- 0 Hz ~ 25 GHz
- Power (Watts):
- -
- Impedance:
- 50 Ohms
- Grade:
- -
- Qualification:
- -
HMC654LP2ETR FAQ
1.How can I place an order for HMC654LP2ETR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC654LP2ETR 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 HMC654LP2ETR reliable?
The price and inventory of HMC654LP2ETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC654LP2ETR is usually 5 days.
3.What payment methods are accepted for HMC654LP2ETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC654LP2ETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC654LP2ETR?
HMC654LP2ETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC654LP2ETR 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 HMC654LP2ETR?
For technical support, including HMC654LP2ETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC654LP2ETR requirements.
6.How does Aetrix verify that HMC654LP2ETR is sourced from the original manufacturer or authorized distributors?
All HMC654LP2ETR 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 HMC654LP2ETR meets industry standards.
7.What is the process for return or replacement of HMC654LP2ETR?
All HMC654LP2ETR units undergo pre-shipment inspection (PSI). If there is an issue with HMC654LP2ETR, 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 HMC654LP2ETR part is unused and in its original packaging.
Return procedure for HMC654LP2ETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC654LP2ETR Tags
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