HMC778LP6CE Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
The HMC778LP6CE is a high-performance fractional-N phase-locked loop synthesizer with integrated VCO from Analog Devices, covering an output frequency range of 9.6GHz to 10.8GHz with ultra-low phase noise in a compact 40-pin QFN SMT package. It offers fine frequency resolution through its delta-sigma fractional divider, making it suitable for X-band radar, satellite communications, and microwave test equipment. Available from authorized Analog Devices distributors with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 40
- Lifecycle
- OBSOLETE
- Datasheet
- HMC778LP6CE Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of HMC778LP6CE?
- Integrated X-band VCO covering 9.6GHz to 10.8GHz eliminates the need for a discrete external oscillator, reducing phase noise contribution from VCO-PLL interconnect
- Fractional-N delta-sigma architecture provides fine sub-Hz frequency resolution enabling precise channel spacing in X-band radar and satellite transponders
- Ultra-low phase noise floor meets demanding spectral purity requirements for microwave LO synthesis in defense SATCOM and high-data-rate backhaul radios
- 40-pin QFN SMT package with 6mm x 6mm body enables compact RF board layouts in phased-array antenna modules and compact radar transmitters
- On-chip charge pump, loop filter interface, and SPI programming reduce external component count and simplify synthesizer design compared to discrete PLL+VCO solutions
What is HMC778LP6CE used for?
The HMC778LP6CE is designed for X-band radar local oscillator synthesis in airborne, naval, and ground-based radar systems requiring low phase noise from 9.6GHz to 10.8GHz. It serves as the frequency reference in satellite communication earth station upconverters and VSAT transceivers operating in the X-band spectrum where precise carrier frequency and low spurious outputs are mandatory. Microwave test and measurement equipment developers also use it for signal generator and frequency reference modules where fine frequency resolution and spectral purity across the full 9.6 to 10.8GHz tuning range are required.
What are the specifications of HMC778LP6CE?
| Pbfree Code | No |
| Manufacturer Package Code | HCP-40-1 |
| YTEOL | 0 |
| Analog IC - Other Type | PHASE LOCKED LOOP |
| JESD-30 Code | S-PQCC-N40 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC40,.24SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 290mA |
| Supply Voltage-Max (Vsup) | 3.5V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the HMC778LP6CE datasheet?
HMC778LP6CE Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for HMC778LP6CE?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output frequency range does the HMC778LP6CE cover, and which radar bands fall within that range?
The HMC778LP6CE tunes from 9.6GHz to 10.8GHz, covering the full X-band radar allocation from 9.3GHz to 9.5GHz (marine and weather radar) and extending into the 10GHz fixed satellite and terrestrial microwave bands. The 1.2GHz tuning bandwidth in a single integrated PLL plus VCO device eliminates the need for band-switching in many X-band system designs, reducing circuit complexity and minimizing switching transients.
How does the fractional-N architecture of the HMC778LP6CE enable finer frequency resolution than an integer-N PLL at the same reference frequency?
In an integer-N PLL, output frequency resolution equals the reference frequency divided by the prescaler ratio, typically limiting resolution to megahertz steps for 10GHz outputs with a 10MHz reference. The HMC778LP6CE's fractional-N delta-sigma modulator divides the loop by non-integer ratios, achieving sub-kilohertz frequency steps while maintaining a wide loop bandwidth above 100kHz for fast lock times. This fine resolution is essential for frequency-hopping radar waveforms and precise SATCOM carrier offset tuning.
What package does the HMC778LP6CE use, and what PCB material is required for reliable X-band performance?
The HMC778LP6CE is housed in a 40-pin QFN package measuring 6mm x 6mm with a 0.5mm pitch and an exposed ground pad on the bottom. At X-band frequencies above 9GHz, PCB material with Dk below 3.5 and loss tangent below 0.003 such as Rogers RO4003C or Taconic RF-35 is recommended to minimize dielectric losses in the RF output trace. A 4-layer PCB with ground flood beneath the QFN pad and multiple via stitching is standard practice to achieve the published phase noise and spurious performance.
For a VSAT terminal designer, how does integrating the VCO inside the HMC778LP6CE reduce design risk compared to a discrete PLL plus external VCO approach?
An integrated VCO-PLL such as the HMC778LP6CE eliminates the external transmission line between the PLL output and VCO input, removing a critical source of parasitic phase noise degradation and spurious pickup at 10GHz. The VCO is factory-characterized and guaranteed to meet phase noise and pushing sensitivity specifications in combination with the PLL loop filter, reducing the 6 to 8 week iteration cycle typically required to tune a discrete VCO into a new PLL design. Board area savings are approximately 30% to 50% compared to a two-chip solution.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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