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Analog Devices Inc. HMC834LP6GETR
- Part No.:
- HMC834LP6GETR
- Manufacturer:
- Analog Devices Inc.
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
HMC834LP6GETR.pdf
- Description:
- IC PLL W/VCO FRACTIONAL-N 40-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,008
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Product details
Overview
HMC834LP6GETR from Analog Devices (formerly Hittite Microwave) is a wideband fractional-N phase-locked loop with integrated VCO, operating across four RF bands: 45–1050 MHz, 1400–2100 MHz, 2800–4200 MHz, and 5600–8400 MHz. It delivers ultra-low phase noise (−110 dBc/Hz in-band typ.), <180 fs RMS jitter, and 24-bit frequency resolution (3 Hz typ.), serving as a tunable LO source in cellular infrastructure and high-data-rate radios.
For engineers reviewing the HMC834LP6GETR datasheet, HMC834LP6GETR pinout, HMC834LP6GETR application, or HMC834LP6GETR equivalent, key selection criteria include its 100 MHz max phase detector rate, −227 dBc/Hz figure of merit, Exact Frequency Mode for zero-Hz error synthesis, and 40-pin 6×6 mm QFN package with integrated VCO output divider (1/2/4/…/62) and doubler.
Technical Context
The HMC834LP6GETR integrates a fundamental VCO core (2800–4200 MHz), programmable RF output divider (1 to 62), and doubler to achieve four discrete output bands. Its delta-sigma modulator supports fractional-N operation up to 100 MHz PFD rate, enabling wide loop bandwidths while maintaining spurious-free performance.
It features dual-supply architecture: 5 V for VCO core, charge pump, and dividers; 3.3 V for digital logic, phase detector, and analog biasing. The device implements on-chip digital self-test, RF output power control (0–6 dB in ~2 dB steps), and mute functionality - all configurable via 3-wire serial interface (SCK/SDI/SEN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Bands | 45–1050 MHz, 1400–2100 MHz, 2800–4200 MHz, 5600–8400 MHz - enables single-device coverage of sub-GHz to Ka-band in infrastructure transceivers. |
| Max Phase Detector Rate | 100 MHz - supports fast lock times and wide loop bandwidths for dynamic frequency agility in repeaters and femtocells. |
| In-Band Phase Noise | −110 dBc/Hz typ. - minimizes reciprocal mixing and improves receiver sensitivity in crowded spectral environments. |
| Figure of Merit (FOM) | −227 dBc/Hz (fractional mode) - industry-leading efficiency metric indicating low close-in and far-out noise trade-off. |
| RMS Jitter | <180 fs (1 kHz–100 MHz integration) - meets timing requirements for high-speed ADC/DAC clocking and 10+ Gbps data converters. |
| Frequency Resolution | 3 Hz typ. (24-bit step size) - enables precise channel spacing and carrier placement in narrowband wireless standards. |
| VCO Tuning Sensitivity | 11.5–15 MHz/V (2.5 V bias) - defines loop filter gain stability margin and tuning linearity across 2.8–4.2 GHz band. |
Pinout & Package
40-lead, 6×6 mm, RoHS-compliant QFN package (MSL1, matte Sn finish) with exposed ground paddle. Thermal resistance θJ-PD = 20 °C/W. All ground leads and paddle must be soldered to PCB RF ground per Hittite land pattern guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 16, 25, 27, 35–36, 39 | Power Supply Inputs | Differentiated 3.3 V (AVDD, RVDD, DVDD3V, VCCHF, VCCPS, VCCPD) and 5 V (VPPCP, VDDLS, VCC1, VCC2) rails isolate analog, digital, VCO, and charge pump domains. |
| 3, 4, 7 | Charge Pump Interface | VPPCP powers analog CP section; CP is open-drain output; VDDLS supplies CP digital logic - critical for low-noise current steering. |
| 15, 30 | Reference & RF Outputs | XREFP accepts AC-coupled 1–3.3 Vp-p reference (≤350 MHz); RF_N provides single-ended or differential RF output (2800–8400 MHz). |
| 17, 30–33 | Control & Interface | CEN enables/disables device; SEN/SDI/SCK implement 3-wire SPI; LD_SDO serves as lock detect, SDO, or GPO - simplifies system monitoring. |
| 23, 40 | Tuning & Bias | VTUNE connects to loop filter for VCO frequency control; BIAS provides internal 1.92 V ±20 mV precision reference (high-impedance, no external load). |
Key Features
| Feature | Design Value |
|---|---|
| Exact Frequency Mode | Enables zero-Hz frequency error synthesis via delta-sigma modulator - eliminates fractional spur-induced channel misalignment in LTE/NR base stations. |
| Integrated VCO Output Divider | Programmable divide-by-1/2/4/6/…/62 - allows flexible band selection without external dividers, reducing board area and insertion loss in phased arrays. |
| Ultra-Low FOM | −227 dBc/Hz floor in fractional mode - ensures optimal phase noise vs. power trade-off for battery-constrained test equipment and portable radios. |
| Digital Self-Test | Built-in diagnostics verify PLL lock, VCO calibration, and register integrity - reduces validation time during production testing of 4G/5G modules. |
| RF Output Power Control | 0–6 dB range in ~2 dB steps - enables dynamic output level adjustment to match mixer LO drive requirements across temperature and process variation. |
Applications
| Cellular Infrastructure LO Generation | High-Speed Data Converter Clocking |
|---|---|
|
Use Scenario: Generating local oscillator signals for up/down-conversion in macrocell and small-cell base stations operating across LTE Band 13–42 and 5G NR n77/n78. IC Role / Device Role / Timing Role: Wideband fractional-N PLL with integrated VCO serves as primary synthesizer, replacing multi-chip solutions with discrete VCO + PLL IC. Use Value: Four-band coverage eliminates need for band-switching filters or multiple synthesizers; −110 dBc/Hz in-band phase noise improves adjacent-channel rejection by >3 dB. |
Use Scenario: Providing low-jitter sampling clocks for 14-bit, 500 MSPS+ ADCs and DACs in software-defined radio and radar systems. IC Role / Device Role / Timing Role: Ultra-low jitter (<180 fs) tunable reference source replaces crystal oscillators and jitter cleaners in high-resolution signal chains. Use Value: 180 fs RMS jitter directly translates to <0.5 LSB SNR degradation at 14-bit resolution - preserving effective number of bits (ENOB) in wideband receivers. |
| Tunable Reference Source for Spur-Sensitive Systems | Phased Array Beamformer LO Distribution |
|
Use Scenario: Acting as a programmable reference input to secondary PLLs (e.g., HMC830) in test equipment requiring ultra-low spurious performance below −90 dBc. IC Role / Device Role / Timing Role: Low-noise, tunable reference generator leveraging Exact Frequency Mode and sub-45 MHz capability (down to 45.16129 MHz). Use Value: Enables spur-free synthesis in cascaded PLL architectures - worst-case spur reduced by 15 dB compared to fixed 50 MHz references. |
Use Scenario: Distributing synchronized, phase-coherent LO signals across hundreds of T/R modules in active electronically scanned array (AESA) radar front-ends. IC Role / Device Role / Timing Role: High-frequency, low-phase-noise synthesizer generating 2.8–8.4 GHz outputs with deterministic phase alignment across channels. Use Value: <180 fs jitter and <−134 dBc/Hz @ 1 MHz offset ensure beam pointing accuracy within ±0.1° over full temperature range in X/Ku-band radars. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fractional-N PLL with integrated VCO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADF4351BCPZ | Wider tuning range (35 MHz–4.4 GHz), but higher in-band phase noise (−100 dBc/Hz typ.) and lower FOM (−223 dBc/Hz). | Limited to ≤4.4 GHz output; lacks doubler and exact frequency mode - less suitable for Ka-band or zero-error synthesis. | Prefer HMC834LP6GETR for >5.6 GHz operation, ultra-low jitter, or exact-frequency compliance in 5G FR2 systems. |
| LMS8001TR | Integrated transceiver SoC with embedded PLL/VCO; lower RF output power (−10 dBm) and no standalone PLL configuration flexibility. | Designed for SDR baseband + RF integration; not pin-compatible and requires full SoC evaluation - unsuitable for discrete PLL replacement. | Choose HMC834LP6GETR when discrete, high-performance PLL control, independent VCO tuning, or legacy analog interface is required. |
Compared with ADF4351BCPZ and LMS8001TR, the HMC834LP6GETR offers superior phase noise floor, wider upper-frequency coverage (to 8.4 GHz), and deterministic zero-error synthesis - making it the preferred choice for infrastructure-grade, multi-band, low-spur RF systems where spectral purity and timing precision are critical.
Availability
HMC834LP6GETR is available at Aetrix Electronics and suitable for cellular infrastructure, high-speed data converter clocking, and phased array radar applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for HMC834LP6GETR 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 portfolio, specializing in microwave/mmWave ICs for communications, defense, and instrumentation.
The HMC834LP6GETR belongs to Hittite's integrated PLL/VCO family, designed specifically for broadband, low-phase-noise frequency synthesis in wireless infrastructure and test equipment where spectral purity and wideband agility are essential.
FAQ
What is the maximum reference input frequency supported by the HMC834LP6GETR?
The HMC834LP6GETR supports a maximum reference input frequency of 350 MHz on the XREFP pin. This high reference capability enables direct use of OCXO or TCXO sources without prescaling, improving overall system phase noise and simplifying clock tree design in high-data-rate radios.
Does the HMC834LP6GETR support differential RF output?
Yes, the HMC834LP6GETR supports both single-ended and differential RF output configurations using the RF_N pin. In differential mode, output power increases by up to 3 dB compared to single-ended operation, enhancing signal integrity in balanced mixer interfaces and reducing common-mode noise in sensitive receiver paths.
How does the Exact Frequency Mode function in the HMC834LP6GETR?
The Exact Frequency Mode in the HMC834LP6GETR uses the delta-sigma modulator to eliminate residual fractional spur-induced frequency error, achieving true zero-Hz output frequency deviation. This mode is activated via register configuration and is validated across all four output bands - critical for carrier alignment in OFDMA-based 5G NR deployments.
What thermal management considerations apply to the HMC834LP6GETR package?
The HMC834LP6GETR uses a 6×6 mm QFN with exposed ground paddle and θJ-PD = 20 °C/W. To maintain junction temperature ≤125 °C, the PCB must incorporate ≥6 thermal vias under the paddle connected to an internal ground plane, and total power dissipation (max ~320 mW) must be accounted for in layout and enclosure thermal design.
Can the HMC834LP6GETR generate frequencies below 100 MHz, and what is its lowest usable output?
Yes, the HMC834LP6GETR can generate frequencies as low as 45.16129 MHz using its highest division ratio (÷62) from the 2.8 GHz VCO band. Measured phase noise at 45 MHz is −111 dBc/Hz @ 10 kHz offset, confirming usability as a tunable low-frequency reference in spectrum analyzers and signal generators.
HMC834LP6GETR 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:
- 8.4GHz
- 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)
HMC834LP6GETR FAQ
1.How can I place an order for HMC834LP6GETR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC834LP6GETR 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 HMC834LP6GETR reliable?
The price and inventory of HMC834LP6GETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC834LP6GETR is usually 5 days.
3.What payment methods are accepted for HMC834LP6GETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC834LP6GETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC834LP6GETR?
HMC834LP6GETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC834LP6GETR 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 HMC834LP6GETR?
For technical support, including HMC834LP6GETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC834LP6GETR requirements.
6.How does Aetrix verify that HMC834LP6GETR is sourced from the original manufacturer or authorized distributors?
All HMC834LP6GETR 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 HMC834LP6GETR meets industry standards.
7.What is the process for return or replacement of HMC834LP6GETR?
All HMC834LP6GETR units undergo pre-shipment inspection (PSI). If there is an issue with HMC834LP6GETR, 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 HMC834LP6GETR part is unused and in its original packaging.
Return procedure for HMC834LP6GETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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