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Analog Devices Inc. 130450-HMC941LP4E
- Part No.:
- 130450-HMC941LP4E
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
130450-HMC941LP4E.pdf
- Description:
- BOARD EVAL HMC941LP4E
- Quantity:
- Payment:
- Shipping:
Inventory:3,494
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Product details
Overview
HMC941LP4E from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC 5-bit digital attenuator IC for RF signal conditioning in microwave and millimeter-wave systems. It delivers 0.5 dB LSB resolution across 15.5 dB range, insertion loss <4.5 dB up to 26.5 GHz, and +45 dBm input IP3 - enabling precise gain control in fiber-optic transceivers and radar front-ends.
For engineers reviewing the HMC941LP4E datasheet, HMC941LP4E pinout, HMC941LP4E application, or HMC941LP4E equivalent, key selection criteria include broadband 0.1–33 GHz operation, ±0.3 dB typical step accuracy, RoHS-compliant 16 mm² leadless SMT package, and single-supply +5V/−5V bias compatibility with TTL-level control inputs.
Technical Context
The HMC941LP4E implements a monolithic GaAs MMIC architecture with five independent bit cells (0.5/1/2/4/8 dB), each controlled by a dedicated 0/+5 V logic line. Attenuation states are generated via parallel switching of matched resistive networks, preserving 50 Ω impedance at RF1 and RF2 ports across all settings.
It operates over −40 °C to +85 °C with thermal resistance of 146 °C/W and requires full ground paddle soldering per Hittite land pattern guidance. Control timing is characterized at tON/tOFF ≤ 90 ns and tRISE/tFALL ≤ 60 ns, supporting high-speed AGC loops in test equipment and phased-array receivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 0.1–33.0 GHz - supports full-bandwidth operation from UHF through Ka-band without external tuning. |
| Attenuation Range & Resolution | 0–15.5 dB in 0.5 dB LSB steps - enables fine-grained RF power leveling in optical modulator drivers and receiver AGC. |
| Insertion Loss | ≤4.5 dB (0.1–18 GHz), ≤6.5 dB (26.5–33 GHz) - defines minimum signal path degradation before attenuation is applied. |
| Input IP3 | +45 dBm (0.5–33 GHz) - ensures low intermodulation distortion in multi-carrier microwave radio and VSAT transmit chains. |
| Return Loss | ≥12 dB (RF1 & RF2, all states, 0.1–33 GHz) - maintains VSWR ≤1.7:1 for stable impedance matching into 50 Ω systems. |
| Control Interface | Five 0/+5 V TTL-compatible inputs (P0–P4) - allows direct connection to FPGA GPIO or microcontroller I/O without level-shifting. |
| Supply Current | IDD = 2.5–6.5 mA, ISS = −3.0 to −7.0 mA - enables low-power biasing with standard dual-rail LDOs. |
Pinout & Package
16 mm² RoHS-compliant leadless plastic QFN package (HMC941LP4E) with exposed ground paddle; requires full-solder connection to PCB RF ground plane per Hittite Application Note land pattern guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vss | Negative bias rail (−5 V); must be decoupled locally and connected to ground plane. |
| 5, 14 | RF1, RF2 | DC-coupled 50 Ω RF ports; require external blocking capacitors if DC potential ≠ 0 V. |
| 18 | Vdd | Positive bias rail (+5 V); requires local 100 nF + 10 µF decoupling. |
| 20–24 | P0–P4 | Bit-select control lines (0.5/1/2/4/8 dB); logic-high = enabled, referenced to Vdd/Vss rails. |
| 2–4, 6–13, 15–17, 19 | N/C | No internal connection; must be externally grounded to RF/DC ground per measurement conditions. |
| Package Bottom | GND Paddle | Thermal and RF ground interface; solder coverage ≥90% required for thermal dissipation and return loss performance. |
Key Features
| Feature | Design Value |
|---|---|
| 0.5 dB LSB resolution with ±0.3 dB typical step error | Enables accurate RF power calibration in automated test equipment without post-fabrication trimming. |
| +45 dBm input IP3 at 0.5–33 GHz | Supports high-linearity operation in broadband satellite uplink amplifiers handling multiple adjacent carriers. |
| 60 ns RF rise/fall time and 90 ns enable delay | Meets timing requirements for real-time adaptive beamforming in military ECM systems. |
| −40 °C to +85 °C operating temperature range | Validates use in unheated outdoor VSAT terminals and airborne radar subsystems. |
| RoHS-compliant matte tin finish, MSL1 rating | Allows lead-free reflow assembly at 260 °C peak without moisture sensitivity concerns. |
Applications
| Fiber-Optic Transceiver Line Card | Microwave Point-to-Point Radio |
|---|---|
|
Use Scenario: Dynamic optical modulation depth control in 100G coherent transceivers using analog IQ modulators. IC Role / Device Role / Timing Role: RF signal attenuator placed between DAC output and modulator driver to maintain optimal RF drive level under varying laser bias conditions. Use Value: 0.5 dB LSB resolution and ±0.3 dB step accuracy ensure EVM stability across temperature, reducing BER drift in DP-QPSK transmission. |
Use Scenario: Transmit power leveling in 23–29.5 GHz licensed backhaul radios subject to variable antenna VSWR and cable loss. IC Role / Device Role / Timing Role: Closed-loop RF attenuator in feedback path of power amplifier output stage, controlled by RSSI ADC and microcontroller. Use Value: +45 dBm IIP3 prevents distortion-induced adjacent-channel leakage while 33 GHz bandwidth accommodates full channel plan. |
| Space-Qualified Telemetry Downlink | Millimeter-Wave Test Set Signal Path |
|
Use Scenario: Gain compensation in Ka-band telemetry downlink transmitters aboard LEO satellites with radiation-hardened thermal cycling. IC Role / Device Role / Timing Role: Radiation-tolerant digital attenuator in IF-to-RF upconversion chain, configured at boot via SPI-connected FPGA. Use Value: −40 °C to +85 °C operation and 146 °C/W thermal resistance enable passive thermal management in vacuum environments. |
Use Scenario: Precision signal attenuation in vector network analyzer (VNA) receiver calibration paths and stimulus generation modules. IC Role / Device Role / Timing Role: Reference-grade attenuator in VNA's internal calibration loop, switched synchronously with source modulation. Use Value: 12 dB minimum return loss and <6.5 dB insertion loss up to 33 GHz ensure traceable S-parameter accuracy during factory calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF digital attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC624LP4E | 4-bit, 1 dB LSB, 0.1–20 GHz, +42 dBm IIP3, same 16 mm² package | Limited to 20 GHz and 15 dB max attenuation; lower linearity than HMC941LP4E | Select when Ka-band operation or sub-1 dB resolution is not required and cost optimization is prioritized. |
| PE43711 | 6-bit, 0.25 dB LSB, 9 kHz–6 GHz, +44 dBm IIP3, 4×4 mm QFN | Narrower bandwidth (6 GHz max), lower frequency coverage, different pinout and bias scheme | Choose for sub-6 GHz cellular infrastructure where finer 0.25 dB steps and wider dynamic range outweigh bandwidth needs. |
Compared with HMC624LP4E and PE43711, the HMC941LP4E uniquely combines 33 GHz bandwidth, 0.5 dB LSB resolution, and +45 dBm IIP3 in a single RoHS-compliant surface-mount package - making it the only option for Ka-band test equipment and space-qualified telemetry transmitters requiring both precision and broadband linearity.
Availability
HMC941LP4E is available at Aetrix Electronics and suitable for fiber-optic transceivers, microwave point-to-point radios, and space-qualified telemetry downlinks requiring stable component supply across extended temperature ranges and high-frequency performance.
Supply support for HMC941LP4E 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 IC portfolio, including GaAs MMICs for defense, aerospace, and communications infrastructure.
The HMC941LP4E belongs to Hittite's broadband digital attenuator product line, engineered specifically for Ka-band instrumentation, satellite communications, and electronic warfare systems demanding wideband linearity and precise digital control.
FAQ
What is the maximum RF input power the HMC941LP4E can handle without compression?
The HMC941LP4E supports +27 dBm input power for 0.1 dB compression across 0.5–33 GHz, and +22 dBm from 0.1–0.5 GHz. This specification defines the upper limit of linear operation before gain compression degrades signal fidelity - critical for maintaining EVM in high-order QAM modulated signals used in the HMC941LP4E's target applications.
Does the HMC941LP4E require external blocking capacitors on its RF ports?
Yes, the HMC941LP4E RF1 and RF2 ports are DC-coupled and matched to 50 Ω, so external DC-blocking capacitors are mandatory if the connected circuitry has non-zero DC potential. Failure to implement blocking capacitors risks forward biasing internal diodes and permanent damage to the HMC941LP4E GaAs die.
What is the thermal resistance and power dissipation limit of the HMC941LP4E?
The HMC941LP4E has a thermal resistance of 146 °C/W and a continuous power dissipation limit of 0.445 W at 85 °C ambient, derating by 6.8 mW/°C above that temperature. These values govern heatsinking requirements for the HMC941LP4E in enclosed RF modules operating at full attenuation and maximum RF input power.
Is the HMC941LP4E pin-compatible with the HMC941LP4?
Yes, the HMC941LP4E is a RoHS-compliant drop-in replacement for the HMC941LP4, sharing identical pinout, package dimensions, electrical specifications, and bias requirements - differing only in lead finish (100% matte Sn vs. Sn/Pb) and peak reflow temperature (260 °C vs. 235 °C).
How does the HMC941LP4E achieve ±0.3 dB typical attenuation accuracy?
The HMC941LP4E achieves ±0.3 dB typical step accuracy through monolithic GaAs MMIC process matching of resistor networks across all five bit cells, combined with on-die temperature compensation and tight control of switch parasitics - verified across 0.1–33 GHz and −40 °C to +85 °C for the HMC941LP4E.
130450-HMC941LP4E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Attenuator
- Frequency:
- 100MHz ~ 33GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC941LP4
130450-HMC941LP4E FAQ
1.How can I place an order for 130450-HMC941LP4E through Aetrix?
Please submit a Request for Quotation (RFQ) for 130450-HMC941LP4E 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 130450-HMC941LP4E reliable?
The price and inventory of 130450-HMC941LP4E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 130450-HMC941LP4E is usually 5 days.
3.What payment methods are accepted for 130450-HMC941LP4E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 130450-HMC941LP4E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 130450-HMC941LP4E?
130450-HMC941LP4E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 130450-HMC941LP4E 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 130450-HMC941LP4E?
For technical support, including 130450-HMC941LP4E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 130450-HMC941LP4E requirements.
6.How does Aetrix verify that 130450-HMC941LP4E is sourced from the original manufacturer or authorized distributors?
All 130450-HMC941LP4E 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 130450-HMC941LP4E meets industry standards.
7.What is the process for return or replacement of 130450-HMC941LP4E?
All 130450-HMC941LP4E units undergo pre-shipment inspection (PSI). If there is an issue with 130450-HMC941LP4E, 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 130450-HMC941LP4E part is unused and in its original packaging.
Return procedure for 130450-HMC941LP4E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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