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HMC704LP4ETR
HMC704LP4ETR
| Part Number | HMC704LP4ETR |
|---|---|
| Manufacturer | Analog Devices Inc. (ADI) / Hittite Microwave |
| Category | Integrated Circuits (ICs) > Clock/Timing > ICs Fractional-N / Integer-N PLL Synthesizers |
| Description | High Performance Fractional-N PLL Synthesizer, 8 GHz Maximum Operating Frequency, Ultra-Low Phase Noise, 24-Lead 4mm x 4mm QFN Package. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The HMC704LP4ETR is a low phase noise fractional/integer-N PLL synthesizer from ADI (Hittite). It supports up to 8GHz RF input, built with differential phase detector, precision charge pump and 16-bit delta-sigma modulator to suppress spurs. This chip delivers clean LO signals for RF microwave equipment, features wide loop bandwidth and fast frequency lock. Packaged in 4×4mm 24-pin QFN tape-and-reel format, ideal for SDR and multi-carrier communication devices.
Core Advantages
Industry-Leading Phase Noise Performance
-233 dBc/Hz FOM in integer mode, maintains high signal purity for narrowband RF systems.
8GHz Wide Frequency Coverage
Direct 8GHz RF input without extra prescalers, fits C/X band communication hardware.
Precision Zero-Error Tuning
Built-in exact frequency mode removes fractional tuning offset errors.
Adjustable Charge Pump
Max 2.5mA programmable charge pump current, flexible loop filter design.
Key Specifications
| Brand | Analog Devices Inc. (ADI) / Hittite Microwave Synthesizer Series |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free Green Material Matrix (“E” suffix) |
| EDA/CAD Model | Schematic Symbols, PCB footprints, and ADIsimPLL design files |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | 24-QFN(4mm x 4mm) |
| Mounting Type | Surface Mount |
| Surface Marking / Silkscreen | H704 Marking |
| Synthesizer Type | Fractional-N and Integer-N Capabilities, 19-bit fractional divider |
| Maximum RF Input Frequency | 8.0 GHz |
| Maximum Phase Detector Frequency | 100 MHz (Integer Mode) / 100 MHz (Fractional Mode) |
| Delta-Sigma Modulator | 16-Bit Fractional Delta-Sigma Modulator Resolution |
| Figure of Merit (FOM) | -230 dBc/Hz (Fractional Mode) / -233 dBc/Hz (Integer Mode) |
| Supply Voltage (Vcc) | Dual Supply Compatible: +3.3V Digital/Analog (3V~3.5V typical) and up to +5.0V Charge Pump Rail |
| Interface Protocol | 3-Wire or 4-Wire Serial Peripheral Interface (SPI Control) |
| Operating Temperature Range | -40°C to +85°C Extended Industrial Thermal Range |
| Phase Jitter | 50 fs typical integrated jitter |
| Charge Pump Max Current | 2.5 mA programmable drive |
| Tape & Reel Mark | Suffix TR = Tape and Reel factory packaging |
| Reference Input Frequency Range | 10 MHz ~ 200 MHz |
Typical Applications
- Cellular Base Station Infrastructure, LTE, 5G Macro Cells, and Multi-Carrier Repeaters
- Microwave Point-to-Point Backhaul Radios, VSAT Terminals, and Satellite Ground Hubs
- High-Speed Test and Measurement Equipment, Spectrum Analyzers, and Synthesized Sources
- Military Communications, Phased Array Radar Systems, and Electronic Countermeasure (ECM) Blocks
- Clock Generation Subsystems for High-Speed Data Converters (ADC/DAC Clocking Lines)
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What does TR stand for in HMC704LP4ETR?
A: TR means Tape & Reel packaging, suitable for automated SMT pick-and-place production.
Q2: Advantages of the 16-bit delta-sigma modulator?
A: It realizes ultra-fine sub-Hz frequency tuning and reduces fractional spurs for high-precision signal output.
Q3: Why separate power rail for charge pump?
A: Charge pump supports up to 5V supply while core runs at 3.3V, expanding VCO tuning range without extra op-amps.
Q4: PCB layout tips for the exposed thermal pad?
A: Solder the pad to PCB copper with multiple ground vias to reduce noise and improve heat dissipation.
Q5: What’s the operating temperature range of HMC704LP4ETR?
A: Industrial grade -40℃ to +85℃, works stably in outdoor & industrial RF equipment.
Q6: What reference input frequency can this PLL accept?
A: Reference input supports 10MHz to 200MHz for flexible system design.
Q7: Is HMC704LP4ETR RoHS compliant?
A: Yes, lead-free RoHS compliant, marked with suffix E on the part number.
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