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Analog Devices Inc. 118853-HMC792LP4E
- Part No.:
- 118853-HMC792LP4E
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
118853-HMC792LP4E.pdf
- Description:
- BOARD EVAL HMC792LP4E
- Quantity:
- Payment:
- Shipping:
Inventory:1,694
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Product details
Overview
HMC792LP4E from Hittite Microwave Corporation is a GaAs MMIC 6-bit digital attenuator in a 4×4 mm QFN package, delivering 0.25 dB LSB steps across 15.75 dB range, ≤2.4 dB insertion loss at 3–6 GHz, and +55 dBm input IP3 for RF/IF signal conditioning in infrastructure transceivers.
For engineers reviewing the HMC792LP4E datasheet, HMC792LP4E pinout, HMC792LP4E application, or HMC792LP4E equivalent, this page provides verified specifications, serial/parallel control interface details, power-up state selection logic, and RoHS-compliant SMT packaging for DC–6 GHz broadband systems.
Technical Context
The HMC792LP4E implements a monolithic GaAs MMIC architecture with integrated on-die switching elements and off-chip AC-ground (ACG) capacitors enabling near-DC operation. Its dual-mode interface supports both 3-wire SPI (SERIN/CLK/LE) and 6-bit parallel (D0–D5) control with latched or direct modes.
Power-up state is configurable via PUP1/PUP2 pins or D0–D5 inputs, with latch timing defined by LE pulse width ≥10 ns and spacing ≥630 ns. It operates from single +3 V or +5 V supply with 1.4–1.6 mA quiescent current and −40 to +85 °C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | DC to 6 GHz - enables IF and RF path attenuation without external tuning or matching components |
| Attenuation Range & Step | 0 to 15.75 dB in 0.25 dB LSB steps - supports fine-grained gain control in closed-loop AGC systems |
| Insertion Loss | 1.8 dB typ. @ 2 GHz, ≤2.4 dB max. @ 3–6 GHz - minimizes signal path degradation in cascaded front-end designs |
| Input IP3 | +55 dBm typ. - ensures high linearity under two-tone 10 dBm conditions, critical for multi-carrier cellular base stations |
| Switching Speed | tON/tOFF ≤150 ns - supports fast channel reconfiguration in TDD and burst-mode wireless systems |
| Supply Voltage | +3 V or +5 V single supply - simplifies biasing in mixed-voltage RF subsystems without level-shifting |
| Package | 24-lead 4×4 mm QFN, RoHS-compliant - surface-mount compatible with standard reflow profiles (MSL1, 260 °C peak) |
Pinout & Package
The HMC792LP4E is housed in a 24-lead, 4×4 mm, RoHS-compliant QFN package with exposed thermal paddle requiring solder connection to PCB ground plane per Hittite land pattern guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P/S) | Parallel/Serial Mode Select | High = serial mode (SERIN/CLK/LE active); Low = parallel mode (D0–D5 active) |
| 2 (CLK), 3 (SERIN), 4 (LE) | SPI Interface Inputs | Edge-triggered clock and data; LE latches serial word on rising edge; masked during LE low |
| 5, 14 (GND) | RF/DC Ground Reference | Must be connected to PCB ground plane with multiple vias; package paddle also grounded |
| 6, 13 (RF1, RF2) | RF Signal Ports | DC-coupled 50 Ω matched ports; require external blocking capacitors for sub-700 MHz operation |
| 7–12 (ACG1–ACG6) | AC Ground Terminals | Require external 330 pF capacitors to ground for near-DC operation; placement critical for low-frequency stability |
| 15 (SEROUT) | Serial Output | 6-cycle delayed echo of SERIN - enables daisy-chaining of multiple Hittite serial devices |
| 16, 17 (PUP2, PUP1) | Power-Up State Select | Set attenuation state at power-on when LE is low; overrides D0–D5 if LE is low during startup |
| 18 (Vdd) | Positive Supply | +3 V or +5 V single supply; decoupling capacitor required close to pin |
| 19–24 (D5–D0) | Parallel Control Inputs | 6-bit binary word defining attenuation state; latched on LE high in parallel mode |
Key Features
| Feature | Design Value |
|---|---|
| 0.25 dB LSB resolution | Enables precise RF gain adjustment in 64 discrete states for calibration and dynamic range optimization |
| User-selectable power-up state | Configurable via PUP1/PUP2 or D0–D5 to ensure known attenuation at system boot, avoiding transient overdrive |
| Dual-mode digital interface | Supports both space-constrained serial (3-wire) and latency-sensitive parallel (6-bit) control in same footprint |
| No external matching required | Integrated 50 Ω RF port matching eliminates discrete baluns or impedance transformers in 50 Ω systems |
| High linearity (+55 dBm IP3) | Maintains signal fidelity in multi-carrier LTE/WiMAX environments where intermodulation distortion must be minimized |
Applications
| Cellular Base Station Transceivers | WiMAX/4G IF Signal Conditioning |
|---|---|
Use Scenario: Attenuating transmit/receive paths in macrocell and small-cell BTS to maintain EVM and ACLR compliance across varying channel loading. IC Role / Device Role / Timing Role: Programmable RF gain element placed between upconverter and PA driver or after LNA in receive chain. Use Value: 0.25 dB step resolution and ±0.2 dB typical step error enable accurate open-loop power control without feedback loop overhead. | Use Scenario: Calibrating IF signal levels in WiMAX CPE and base station modems operating at 2.3–3.8 GHz bands. IC Role / Device Role / Timing Role: Digitally controlled variable loss block in analog IF stage prior to ADC or after DAC. Use Value: DC–6 GHz bandwidth supports full WiMAX channel bandwidths; +55 dBm IP3 prevents distortion-induced bit errors in high-order QAM. |
| Microwave Radio Backhaul | Test & Measurement Signal Sources |
Use Scenario: Dynamic range adjustment in point-to-point E-band and V-band radios where link budget varies with weather and alignment. IC Role / Device Role / Timing Role: Adaptive attenuator in automatic level control (ALC) loop between synthesizer and mixer. Use Value: 150 ns switching speed allows real-time compensation of fading; low insertion loss preserves noise figure in sensitive receivers. | Use Scenario: Precision amplitude setting in RF signal generators and vector network analyzer reference paths. IC Role / Device Role / Timing Role: Calibration-grade programmable loss element in source output stage or receiver input protection circuit. Use Value: Traceable 0.25 dB steps and <±0.3 dB accuracy up to 4 GHz support metrology-grade amplitude repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC624LP4E | 5-bit, 0.5 dB LSB, 31.5 dB range, DC–6 GHz, higher insertion loss (2.8 dB typ.) | Better suited for coarse attenuation where wider range outweighs resolution needs | Select HMC624LP4E when >31 dB range is required and 0.5 dB steps suffice for system calibration |
| Qorvo QM11020 | 6-bit, 0.25 dB LSB, DC–6 GHz, GaAs pHEMT, 2.1 dB typ. IL @ 2 GHz, +52 dBm IP3 | Slightly lower linearity and different pinout; requires redesign for SEROUT daisy-chain capability | Choose QM11020 only if alternate supply chain is mandated and SEROUT cascade is not used |
Compared with HMC624LP4E and QM11020, the HMC792LP4E uniquely combines 0.25 dB resolution, +55 dBm IP3, and integrated SEROUT for multi-device synchronization-making it optimal for high-fidelity, cascaded RF front-ends in infrastructure equipment.
Availability
HMC792LP4E is available at Aetrix Electronics and suitable for cellular infrastructure, microwave backhaul, and test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant SMT packaging.
Supply support for HMC792LP4E 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
Hittite Microwave Corporation was a U.S.-based RF/microwave IC designer acquired by Analog Devices in 2014; its high-performance GaAs MMIC portfolio remains widely deployed in communications infrastructure.
The HMC792LP4E belongs to Hittite's broadband digital attenuator product line, engineered for precision RF gain control in wireless base stations, point-to-point radios, and instrumentation where DC–6 GHz coverage and low distortion are essential.
FAQ
What is the minimum operating frequency of the HMC792LP4E?
The HMC792LP4E supports true DC-coupled operation down to 0 Hz when external ACG capacitors (C4–C6, 330 pF) are installed per the application circuit. Without ACG caps, performance is optimized above 700 MHz. The device maintains specified insertion loss, return loss, and attenuation accuracy from DC through 6 GHz, making it suitable for baseband and IF applications requiring near-DC response.
Does the HMC792LP4E require external matching components?
No, the HMC792LP4E does not require external matching components. Its RF1 and RF2 ports are internally matched to 50 Ω across DC–6 GHz. However, external DC-blocking capacitors are mandatory on both RF ports for frequencies below 700 MHz, and external ACG capacitors (330 pF) must be placed on pins 7–12 to enable near-DC functionality. These are biasing/support components-not impedance-matching networks.
How is the power-up attenuation state configured on the HMC792LP4E?
The HMC792LP4E power-up state is selected using either PUP1/PUP2 pins (when LE is low at power-on) or D0–D5 inputs (when LE is high at power-on), per the PUP truth table. The selected state latches approximately 200 ms after power application. This feature ensures deterministic RF attenuation at system boot, preventing uncontrolled signal bursts in sensitive receiver chains or transmitter output stages.
Can the HMC792LP4E be operated from a +3.3 V supply?
Yes, the HMC792LP4E is fully specified for operation from a +3 V supply (2.7–3.6 V range), with all key parameters-including insertion loss, IP3, and switching speed-guaranteed per datasheet. At +3 V, supply current is 1.4 mA typ., and input P0.1dB is 22 dBm min. The device also supports +5 V operation (4.75–5.25 V), offering design flexibility across mixed-voltage RF platforms.
What is the function of the SEROUT pin on the HMC792LP4E?
The SEROUT pin on the HMC792LP4E provides a 6-clock-cycle delayed replica of the SERIN input data stream. This allows multiple HMC792LP4E devices (or other Hittite serial-compatible ICs) to be daisy-chained using a single microcontroller SPI interface-reducing GPIO count and simplifying firmware control in multi-channel RF systems such as phased-array transceivers or multi-port test fixtures.
118853-HMC792LP4E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Attenuator
- Frequency:
- 0Hz ~ 6GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC792LP4E
118853-HMC792LP4E FAQ
1.How can I place an order for 118853-HMC792LP4E through Aetrix?
Please submit a Request for Quotation (RFQ) for 118853-HMC792LP4E 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 118853-HMC792LP4E reliable?
The price and inventory of 118853-HMC792LP4E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 118853-HMC792LP4E is usually 5 days.
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Once your 118853-HMC792LP4E 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 118853-HMC792LP4E?
For technical support, including 118853-HMC792LP4E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 118853-HMC792LP4E requirements.
6.How does Aetrix verify that 118853-HMC792LP4E is sourced from the original manufacturer or authorized distributors?
All 118853-HMC792LP4E 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 118853-HMC792LP4E meets industry standards.
7.What is the process for return or replacement of 118853-HMC792LP4E?
All 118853-HMC792LP4E units undergo pre-shipment inspection (PSI). If there is an issue with 118853-HMC792LP4E, 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 118853-HMC792LP4E part is unused and in its original packaging.
Return procedure for 118853-HMC792LP4E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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