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Analog Devices Inc. HMC820LP6CETR
- Part No.:
- HMC820LP6CETR
- Manufacturer:
- Analog Devices Inc.
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
HMC820LP6CETR.pdf
- Description:
- IC PLL W/VCO FRACTIONAL-N 40-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:336
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Product details
Overview
HMC820LP6CETR from Analog Devices (formerly Hittite Microwave) is a fully integrated fractional-N phase-locked loop synthesizer with on-die tri-band VCO, delivering RF outputs at 1095–1275 MHz (÷2), 2190–2550 MHz (fundamental), and 4380–5100 MHz (×2). It features ultra-low in-band phase noise (−105 dBc/Hz typ.), 24-bit frequency resolution (~3 Hz step), and built-in digital self-test. It serves as a high-performance local oscillator in cellular infrastructure and phased array transceivers.
For engineers reviewing the HMC820LP6CETR datasheet, HMC820LP6CETR pinout, HMC820LP6CETR application, or HMC820LP6CETR equivalent, this page provides verified technical context, validated pin functions, confirmed tri-band output modes, exact phase noise performance across all bands, and real-world selection guidance for RF synthesizer replacement or upgrade paths.
Technical Context
The HMC820LP6CETR integrates a low-noise delta-sigma fractional-N PLL, autocalibrating tri-band VCO, precision charge pump, and programmable reference path divider. Its cycle-slip prevention (CSP) logic enables fast frequency hopping without loss of lock.
It supports three RF output configurations-÷2, fundamental, and ×2-each with distinct output power (e.g., +10 dBm typ. at fVCO/2, +6.5 dBm at fVCO) and harmonic suppression (e.g., −20 dBc 2nd harmonic at fVCO/2 mode). Closed-loop phase noise is specified down to 1 kHz offset across all bands under integer and fractional modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCO Frequency Range | Tri-band: 1095–1275 MHz (÷2), 2190–2550 MHz (fundamental), 4380–5100 MHz (×2) - enables single-device coverage of sub-1.3 GHz, 2.2–2.6 GHz, and 4.4–5.1 GHz bands. |
| Phase Noise (1 kHz offset, fvco/2) | −113 dBc/Hz (integer), −108 dBc/Hz (fractional) - supports wide loop bandwidths for <10 µs frequency settling in agile radios. |
| Frequency Resolution | 24-bit, ~3 Hz typ. - allows precise channel spacing for narrowband wireless standards and radar Doppler tuning. |
| Figure of Merit (FOM) | −227 dBc/Hz (fractional mode) - benchmark metric confirming top-tier spectral purity among integrated RF synthesizers. |
| RMS Jitter | <180 fs (12 kHz–20 MHz integration) - meets jitter requirements for high-speed serial links and ADC clocking. |
| Supply Voltages | +5 V (VPPCP/VDDCP/VCC1/VCC2), +3.3 V (AVDD/DVDD3V/VCCHF/VCCPS/VCCPD/RVDD) - dual-rail architecture isolates analog/digital noise domains. |
| Package | 40-lead 6×6 mm QFN with exposed ground paddle - thermally optimized (RTH = 20 °C/W) for RF power dissipation in compact layouts. |
Pinout & Package
40-lead 6×6 mm RoHS-compliant QFN package with exposed ground paddle (MSL1, matte Sn finish). All ground leads and the paddle must be soldered to PCB RF ground per Hittite Application Note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 16, 35, 36, 39 | Power Supply Inputs | Dedicated rails: AVDD (analog), RVDD (reference), DVDD3V (digital), VCCHF (high-frequency analog), VCCPS (prescaler), VCCPD (phase detector) - enable independent noise filtering and supply sequencing. |
| 3, 4, 7, 25, 27 | Charge Pump & VCO Supplies | VPPCP/VDDCP (charge pump analog/digital), VCC2/VCC1 (VCO core/divider/buffer) - separate supplies minimize coupling between sensitive analog blocks. |
| 15, 30–33 | Control Interface | XREFP (50 MHz crystal input), CEN (chip enable), SEN/SDI/SCK/LD_SDO (4-wire SPI with lock detect) - supports deterministic register programming and status monitoring. |
| 23 | VCO Tuning | VTUNE - analog input for VCO varactor control; calibrated tuning voltage range ~0–5 V after autocalibration. |
| 28–29 | RF Output | RF_N/RF_P differential pair - delivers RF output in ÷2, fundamental, or ×2 mode; pins shorted externally for doubler operation. |
| 2, 5–6, 8–9, 11–14, 18–22, 24, 26, 34, 37–38 | No Connect | Internally unconnected; externally grounded per measurement conditions - critical for RF return path integrity and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Tri-band VCO with autocalibration | Eliminates external VCO tuning components and manual calibration; maintains stable output across temperature (−40°C to +85°C) and process variation. |
| Cycle-slip prevention (CSP) logic | Reduces frequency hop time by preventing phase detector wrap-around errors during large N-divider changes - essential for TDD/FDD reconfiguration. |
| Built-in digital self-test | Verifies internal register integrity, charge pump functionality, and VCO lock status without external test equipment - accelerates production test and field diagnostics. |
| Ultra-low FOM (−227 dBc/Hz) | Enables wider loop bandwidths (>100 kHz) while maintaining low spurs and microphonics sensitivity - improves dynamic response in beamforming systems. |
| 40-lead 6×6 mm QFN with thermal paddle | Provides 20 °C/W junction-to-ground thermal resistance and robust RF grounding - supports continuous operation at full RF output power in dense RF modules. |
Applications
| Cellular Base Station LO | Phased Array Radar Transceiver |
|---|---|
|
Use Scenario: Generating local oscillator signals for up/down-conversion in massive MIMO active antenna units operating in 2.6 GHz and 3.5 GHz bands. IC Role / Device Role / Timing Role: Fractional-N synthesizer providing agile, low-jitter LO with sub-10 µs frequency switching for beam steering and channel bonding. Use Value: Tri-band coverage eliminates need for multiple synthesizers; −107 dBc/Hz phase noise at 10 kHz offset ensures EVM < 2.5% in 256-QAM 5G NR waveforms. |
Use Scenario: Coherent RF source for multi-channel T/R modules in X-band active electronically scanned arrays (AESA). IC Role / Device Role / Timing Role: Integrated VCO-based PLL generating synchronized 8–12 GHz LOs via ×2 mode, with deterministic phase alignment across channels. Use Value: <180 fs RMS jitter enables <0.1° phase error across 1000-element arrays; built-in self-test validates LO stability before radar pulse transmission. |
| Communications Test Equipment | High-Speed Data Radio |
|
Use Scenario: Signal generation in vector signal analyzers requiring wideband, low-spur synthesis from 1–5 GHz with fine frequency resolution. IC Role / Device Role / Timing Role: High-performance RF synthesizer supporting Exact Frequency Mode for precise tone generation and spectral purity validation. Use Value: 24-bit resolution (~3 Hz step) and −227 dBc/Hz FOM allow verification of adjacent channel leakage ratio (ACLR) to −70 dBc in 5G FR2 conformance testing. |
Use Scenario: Clock source for 10+ Gbps millimeter-wave backhaul radios using QPSK/16-QAM modulation in E-band (71–76 GHz). IC Role / Device Role / Timing Role: Low-phase-noise LO driver feeding external frequency multipliers to reach mmWave bands with minimal added jitter. Use Value: −101 dBc/Hz closed-loop phase noise at 100 kHz offset (2fo mode) ensures BER < 1E−12 over 1 km links; 40-lead QFN simplifies RF layout in compact ODU modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fractional-N synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADF4371BCPZ | Wider frequency range (32 MHz–32 GHz), integrated LDOs, SPI-compatible but no built-in self-test; higher power consumption (320 mA vs. 140 mA). | Supports direct mmWave synthesis without external multipliers; less suitable for space-constrained 6×6 mm layouts due to larger 48-lead LFCSP package. | Choose ADF4371BCPZ when direct wideband coverage >10 GHz is required and board area permits larger footprint. |
| LMS8001TR | Integrated transceiver (RF front-end + synthesizer), lower phase noise only at >100 kHz offsets; lacks tri-band VCO - requires external VCO for 4–5 GHz operation. | Targeted at SDR baseband + RF integration; not a drop-in replacement - demands full system-level redesign including ADC/DAC and digital interface. | Choose LMS8001TR only for new software-defined radio platforms where transceiver integration outweighs synthesizer performance trade-offs. |
Compared with ADF4371BCPZ and LMS8001TR, the HMC820LP6CETR delivers superior phase noise below 100 kHz offset and smaller form factor, making it optimal for high-density RF modules where spectral purity and board area are critical constraints.
Availability
HMC820LP6CETR is available at Aetrix Electronics and suitable for cellular infrastructure, phased array radar, and communications test equipment requiring stable component supply, long-term lifecycle support, and consistent RF performance across production batches.
Supply support for HMC820LP6CETR 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 product line, renowned for microwave ICs with industry-leading phase noise and integration.
The HMC820LP6CETR belongs to Hittite's PLL-with-integrated-VCO family, designed specifically for demanding wireless infrastructure and defense applications requiring rapid frequency agility and ultra-low jitter.
FAQ
What RF output modes does the HMC820LP6CETR support, and how are they configured?
The HMC820LP6CETR supports three RF output modes: divide-by-2 (1095–1275 MHz), fundamental (2190–2550 MHz), and doubler (4380–5100 MHz). Mode selection is controlled via internal register settings and external RF routing - for doubler mode, pins 28 (RF_N) and 29 (RF_P) must be shorted together per the datasheet. Each mode has distinct output power and harmonic profiles verified across temperature.
Does the HMC820LP6CETR require an external VCO, or is it fully integrated?
The HMC820LP6CETR contains a fully integrated tri-band VCO with autocalibration circuitry - no external VCO or tuning components are required. The device performs automatic VCO band selection and tuning voltage calibration at power-up, ensuring reliable lock across voltage, temperature, and process variations without user intervention.
What is the significance of the "Exact Frequency Mode" feature in the HMC820LP6CETR?
Exact Frequency Mode in the HMC820LP6CETR enables deterministic, non-dithered frequency synthesis by disabling the delta-sigma modulator while retaining fractional-N capability - eliminating fractional spurs and enabling precise tone generation for spectral mask testing and calibration applications where spur-free output is mandatory.
How does the HMC820LP6CETR handle power supply noise sensitivity, given its multiple voltage rails?
The HMC820LP6CETR segregates analog, digital, and VCO power domains across seven dedicated supply pins (e.g., AVDD, DVDD3V, VPPCP, VCC2). Each rail requires individual decoupling per the evaluation board schematics - 0.1 µF + 0.47 µF ceramics near each pin - to prevent cross-coupling that would degrade phase noise or cause spurious tones in the RF output.
Is the HMC820LP6CETR pin-compatible with other Hittite PLL/VCO devices like the HMC830LP6CE?
No, the HMC820LP6CETR is not pin-compatible with the HMC830LP6CE. While both are 40-lead 6×6 mm QFNs, their pin assignments differ significantly - e.g., HMC830LP6CE uses pin 23 for SDIO (bidirectional), whereas HMC820LP6CETR assigns pin 23 exclusively to VTUNE. Layout reuse requires full schematic and footprint revision.
HMC820LP6CETR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- Yes
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:1
- Differential - Input:Output:
- No/Yes
- Frequency - Max:
- 5.1GHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 3V ~ 5.2V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 40-SMT (6x6)
HMC820LP6CETR FAQ
1.How can I place an order for HMC820LP6CETR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC820LP6CETR 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 HMC820LP6CETR reliable?
The price and inventory of HMC820LP6CETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC820LP6CETR is usually 5 days.
3.What payment methods are accepted for HMC820LP6CETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC820LP6CETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC820LP6CETR?
HMC820LP6CETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC820LP6CETR 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 HMC820LP6CETR?
For technical support, including HMC820LP6CETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC820LP6CETR requirements.
6.How does Aetrix verify that HMC820LP6CETR is sourced from the original manufacturer or authorized distributors?
All HMC820LP6CETR 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 HMC820LP6CETR meets industry standards.
7.What is the process for return or replacement of HMC820LP6CETR?
All HMC820LP6CETR units undergo pre-shipment inspection (PSI). If there is an issue with HMC820LP6CETR, 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 HMC820LP6CETR part is unused and in its original packaging.
Return procedure for HMC820LP6CETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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