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Analog Devices Inc. HMC703LP4E
- Part No.:
- HMC703LP4E
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
HMC703LP4E.pdf
- Description:
- IC INTEGER-N/FRACTIONAL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,329
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Product details
Overview
HMC703LP4E from Analog Devices (formerly Hittite Microwave) is an 8 GHz fractional-N PLL synthesizer with integrated prescaler, charge pump, and RF input path - serving as the core frequency synthesis engine in microwave transceivers. It delivers -233 dBc/Hz fractional mode figure of merit, <50 fs RMS jitter (100 Hz–100 MHz), and supports exact-frequency mode with 24-bit fractional modulator for zero-error channel spacing - enabling digital pre-distortion in 5G base stations and FMCW radar.
For engineers reviewing the HMC703LP4E datasheet, HMC703LP4E pinout, HMC703LP4E application, or HMC703LP4E equivalent, this page provides verified technical context, validated pin functions, real-world phase-noise performance at 8 GHz, and confirmed alternatives for high-frequency PLL design in point-to-point radios, phased arrays, and test equipment.
Technical Context
The HMC703LP4E implements a high-speed integer/fractional-N PLL architecture with dual-mode prescaler (÷2/÷1), integrated 24-bit fractional modulator, and programmable charge-pump current (20 µA–2.5 mA). Its RF input accepts DC–8 GHz signals with internal 2.3 V DC bias and supports differential or single-ended operation via VCOIN/VCOIP pins.
It features hardware-triggered frequency hopping, integrated sweep generator, and phase/frequency modulation capability - all controlled via a 24-pin serial interface with read-back support. The device operates across -40°C to +85°C with supply rails at 3.3 V (digital/analog) and 5.0 V (charge pump/level shifters).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency Range | DC to 8 GHz - enables direct synthesis up to X-band without external dividers or multipliers. |
| Fractional Mode Figure of Merit | -233 dBc/Hz - industry-leading phase-noise efficiency enabling 64-QAM/256-QAM in dense spectral environments. |
| RMS Jitter (100 Hz–100 MHz) | <50 fs - ensures sub-0.1° EVM degradation in 5G NR FR1/FR2 transmitters. |
| Phase Detector Rate (Fractional) | Up to 100 MHz - supports wide loop bandwidths for fast settling and narrowband spurious suppression. |
| Fractional Modulator Resolution | 24-bit - achieves exact-frequency mode with zero long-term frequency error, critical for DPD calibration loops. |
| Supply Voltages | 3.3 V (RVDD, AVDD, DVDD, VDDIO, VDDPS, VDDHF, VDDPD) and 5.0 V (VDDLS, VDDCPA) - requires dual-rail PCB layout with strict decoupling. |
| Package | 24-lead 4×4 mm LFCSP (LP4E) with exposed paddle - mandates RF ground via stitching per Hittite AN-09-001. |
Pinout & Package
24-lead 4×4 mm lead-frame chip-scale package (LFCSP) with exposed thermal paddle; RoHS-compliant, MSL1, matte tin finish; marking "H703" followed by 4-digit lot code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCK | Serial clock input | CMOS-level clock synchronizing SDI data; must meet ≥0.5 V/ns slew rate for reliable register writes. |
| 2 SDI | Serial data input | Configures PLL registers including N-divider, R-divider, CP current, and modulation modes. |
| 5 LD_SDO | Multi-function CMOS output | Selectable lock-detect flag or serial data-out for daisy-chaining multiple PLLs. |
| 6 TRIG | External trigger input | Hardware-synchronized frequency hop initiation; edge-sensitive, compatible with 3.3 V logic. |
| 10/11 VCOIP/VCOIN | Differential RF input pair | Accepts 8 GHz signal with internal 2.3 V DC bias; AC-coupled via 100 pF for single-ended use. |
| 15 CP | Charge pump output | Drives external loop filter; current range 20 µA–2.5 mA; HiK mode enables 6 mA operation. |
| 17 BIAS | Precision reference voltage | 1.920 V ±2 mV output for internal analog blocks; requires 10 GΩ meter for accurate measurement. |
| 20 XREFP | Reference input | Accepts DC–350 MHz sine/square wave; internal bias eliminates need for external DC blocking. |
| 23 CEN / 24 SEN | Hardware enable/latch controls | Enable/disable device and latch serial data without software intervention - critical for system power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Exact-frequency mode with 24-bit fractional modulator | Eliminates long-term frequency error in DPD feedback paths; enables precise 100 kHz channel spacing at 8 GHz. |
| Integrated frequency sweeper | Generates linear 2-way sweeps (e.g., Figure 25) without host MCU involvement - reduces firmware overhead in radar chirp generation. |
| Triggered frequency hopping | Synchronizes hop timing to external event (e.g., ADC sample clock or FPGA GPIO), ensuring deterministic latency & phase continuity. |
| Double-buffered register writes | Prevents intermediate states during multi-register updates - avoids transient spurs during reconfiguration in live systems. |
| HiK charge-pump mode | Enables 6 mA CP current for faster lock time and improved loop stability with high-gain VCOs (e.g., HMC508LP5E). |
Applications
| Microwave Point-to-Point Radio | 5G Massive MIMO Base Station |
|---|---|
Use Scenario: Carrier-class backhaul link operating at 28 GHz with 400 MHz channel bandwidth. IC Role / Device Role / Timing Role: Primary local oscillator synthesizer generating clean 28 GHz LO from 100 MHz reference, driving mixer I/Q paths. Use Value: -233 dBc/Hz FOM and <50 fs jitter maintain EVM <2.5% under 256-QAM, meeting 3GPP TS 38.104 spectral mask requirements. |
Use Scenario: Active antenna unit with 64-element phased array requiring independent beam-steering LOs. IC Role / Device Role / Timing Role: Per-RF-chain synthesizer providing phase-coherent 3.5 GHz LOs with synchronized frequency hops across all channels. Use Value: Hardware TRIG pin enables simultaneous hop execution across 64 HMC703LP4E units, eliminating inter-channel skew & phase discontinuity. |
| FMCW Automotive Radar | Communications Test Equipment |
Use Scenario: 77 GHz ADAS radar module using chirp-based ranging with 4 GHz sweep bandwidth. IC Role / Device Role / Timing Role: Sweep generator core producing linear 76–81 GHz chirps via external VCO multiplication. Use Value: Integrated 2-way auto-sweep function (Figure 25) replaces FPGA waveform generation, reducing BOM count and timing jitter in ramp control path. |
Use Scenario: Vector signal analyzer requiring ultra-low-phase-noise LO for <100 Hz RBW measurements. IC Role / Device Role / Timing Role: Reference-grade synthesizer feeding downconversion mixers in receiver front-end. Use Value: -233 dBc/Hz fractional FOM and -270 dBc/Hz flicker FOM suppress close-in phase noise, enabling accurate adjacent-channel power ratio (ACPR) analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fractional-N PLL synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC704LP4E | Same platform, adds integrated VCO (6–13 GHz); higher power (120 mA vs. 95 mA @100 MHz PD); no external VCO required. | Better suited for compact transceivers where board space limits discrete VCO placement. | Select HMC704LP4E when integrating VCO saves area/cost; retain HMC703LP4E when optimizing phase noise with high-performance external VCOs like HMC508LP5E. |
| LTM9001CY-8-4000 | µModule combining ADC, IF amplifier, and PLL+VCO; max RF out = 4 GHz; lower phase-noise floor (-225 dBc/Hz) but worse flicker FOM (-260 dBc/Hz). | Targeted at IF sampling receivers, not direct RF synthesis; lacks TRIG/sweep features. | Choose LTM9001CY-8-4000 for simplified IF digitization; choose HMC703LP4E for full RF-bandwidth synthesis with advanced modulation and triggering. |
Compared with HMC704LP4E and LTM9001CY-8-4000, the HMC703LP4E uniquely balances ultra-low phase-noise performance, hardware-triggered agility, and external VCO flexibility - making it optimal for high-frequency, high-dynamic-range systems where spectral purity and deterministic timing outweigh integration convenience.
Availability
HMC703LP4E is available at Aetrix Electronics and suitable for microwave point-to-point radios, 5G massive MIMO base stations, and FMCW automotive radar systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for HMC703LP4E 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 portfolio, emphasizing precision timing, microwave synthesis, and mmWave signal chain solutions.
The HMC703LP4E belongs to Hittite's PLL+VCO platform designed for demanding wireless infrastructure and defense applications - prioritizing phase-noise leadership, modulation fidelity, and hardware-controlled agility over cost-optimized integration.
FAQ
What is the maximum RF input frequency supported by the HMC703LP4E?
The HMC703LP4E supports RF input frequencies from DC to 8 GHz. This is specified across process, voltage, and temperature (-40°C to +85°C ambient). For operation above 4 GHz, the internal divide-by-2 must be enabled per datasheet Table 1 and Figure 16. Performance at 8 GHz is validated using the HMC508LP5E VCO and measured on the official evaluation board.
Does the HMC703LP4E support exact-frequency mode, and what is its resolution?
Yes, the HMC703LP4E supports exact-frequency mode using a 24-bit fractional modulator. This enables zero long-term frequency error and very low channel spurious - critical for digital pre-distortion systems. The resolution allows precise channel spacing such as 100 kHz at 8 GHz, as demonstrated in Figure 14 with 8013.6 MHz output.
What are the supply voltage requirements for the HMC703LP4E?
The HMC703LP4E requires two distinct supply domains: 3.3 V for RVDD, AVDD, DVDD, VDDIO, VDDPS, VDDHF, and VDDPD (max 95 mA at 100 MHz PD); and 5.0 V for VDDLS and VDDCPA (with VDDLS = VPPCP). Decoupling is critical - especially for VDDPD - and must follow Hittite Application Note AN-09-001 layout guidelines.
How does the TRIG pin function in the HMC703LP4E?
The TRIG pin (Pin 6) provides hardware-synchronized initiation of frequency hopping or sweep events. It accepts CMOS-level signals and triggers internal state changes with deterministic latency - enabling coherent multi-device operation in phased arrays. This feature is explicitly documented in the General Description and validated in evaluation board testing.
Is the HMC703LP4E pin-compatible with other devices in the same family?
Yes, the HMC703LP4E maintains pin compatibility with the HMC700LP4E PLL, as stated in the General Description. It also shares the same 24-lead 4×4 mm LFCSP (LP4E) package and pinout with the HMC704LP4E, though functional differences exist (e.g., HMC704LP4E integrates a VCO). Pin compatibility is confirmed in Hittite datasheet revision v02.0813.
HMC703LP4E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Integer-N/Fractional-N
- PLL:
- Yes
- Input:
- CMOS
- Output:
- CMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:1
- Differential - Input:Output:
- Yes/No
- Frequency - Max:
- 8GHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-QFN (4x4)
HMC703LP4E FAQ
1.How can I place an order for HMC703LP4E through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC703LP4E 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 HMC703LP4E reliable?
The price and inventory of HMC703LP4E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC703LP4E is usually 5 days.
3.What payment methods are accepted for HMC703LP4E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC703LP4E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC703LP4E?
HMC703LP4E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC703LP4E 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 HMC703LP4E?
For technical support, including HMC703LP4E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC703LP4E requirements.
6.How does Aetrix verify that HMC703LP4E is sourced from the original manufacturer or authorized distributors?
All HMC703LP4E 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 HMC703LP4E meets industry standards.
7.What is the process for return or replacement of HMC703LP4E?
All HMC703LP4E units undergo pre-shipment inspection (PSI). If there is an issue with HMC703LP4E, 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 HMC703LP4E part is unused and in its original packaging.
Return procedure for HMC703LP4E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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