Overview
The HMC984LP4E is a high-performance, ultra-low phase noise SiGe BiCMOS Phase-Frequency Detector and Charge Pump produced by Analog Devices Inc. This component is designed to be used in conjunction with the HMC983LP5E (Fractional Frequency Divider) to form a high-performance, low noise, ultra-low spurious emission fractional-N frequency synthesizer. However, it can also operate as a stand-alone, low phase noise phase frequency detector. The device features a compact 24-pin 4x4 mm LP4 package and is suitable for various high-performance applications requiring ultra-low phase noise and spurious emissions.
Key Specifications
| Parameter | Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| Integer Boundary Spurs | Fpd=50 MHz | -85 | dBc | ||
| Logic Inputs VIH | Input High Voltage | 0.4 | V | ||
| Logic Inputs VIL | Input Low Voltage | 0.4 | V | ||
| Logic Outputs VOH | Output High Voltage | DVDD - 0.4 | V | ||
| Logic Outputs VOL | Output Low Voltage | 0.4 | V | ||
| DC Load | 1.5 | mA | |||
| Serial Port Clock Frequency | 30 | MHz | |||
| AVDD, RVDD Analog Supplies | 2.8 | 3 | 3.3 | V | |
| VCCPD Analog Supply for PD | 4.5 | 5 | 5.5 | V | |
| VPPCP CP Analog Supply | 4.5 | 5 | 5.5 | V | |
| VDDCP CP Digital Supply | 4.5 | 5 | 5.5 | V | |
| Ref. Input Frequency Range | 50 | 350 | MHz | ||
| Ref. Input Power Range | 6 | 12 | dBm |
Key Features
- Ultra-Low Phase Noise: -231 dBc/Hz FOM in Integer Mode and -227 dBc/Hz FOM in Fractional Mode
- Ultra Low Spurious Emissions: Less than 60 dBc fractional spurious emissions
- Differential Phase Detector Input: Supports differential VCO input
- 14-bit Reference Frequency Divider: High precision reference frequency divider
- Lock Indicator Output: Automatic and/or configurable Lock Detect Indicator
- Phase Measurement Capability: Integrated phase measurement capability
- GPIO (General Purpose Input/Output): General purpose input/output pins for flexibility
- Test Pin and Cycle Slip Prevention Support: Integrated CSP (Cycle Slip Prevention) capability when used with HMC983LP5E
- Adjustable Charge Pump Gain and Offset Current: Improves linearity and performance
- Soft Reset Feature: Resets all registers to default values without a power cycle
- Compact Package: 24-pin 4x4 mm LP4 package
Applications
- Test Equipment: High-performance test equipment requiring ultra-low phase noise and spurious emissions
- Portable Instruments: Portable instruments that demand high precision and low noise
- High Performance Fractional-N Frequency Synthesizers: Synthesizers with ultra-low spurious emissions
- Military Applications: Military equipment requiring high reliability and performance
Q & A
- What is the primary function of the HMC984LP4E?
The HMC984LP4E is a high-performance, ultra-low phase noise SiGe BiCMOS Phase-Frequency Detector and Charge Pump.
- What is the typical phase noise performance of the HMC984LP4E?
The HMC984LP4E has a phase noise performance of -231 dBc/Hz FOM in Integer Mode and -227 dBc/Hz FOM in Fractional Mode.
- What is the maximum reference frequency the HMC984LP4E can handle?
The HMC984LP4E can handle a reference frequency as high as 150 MHz.
- Does the HMC984LP4E support differential VCO input?
Yes, the HMC984LP4E supports differential VCO input.
- What is the purpose of the Cycle Slip Prevention (CSP) capability?
The CSP capability, when used with the HMC983LP5E, significantly improves frequency lock time.
- Can the HMC984LP4E be used as a stand-alone component?
Yes, the HMC984LP4E can be used as a stand-alone, low phase noise phase frequency detector.
- What is the package type and size of the HMC984LP4E?
The HMC984LP4E is housed in a compact 24-pin 4x4 mm LP4 package.
- Does the HMC984LP4E have adjustable Charge Pump gain and offset current?
Yes, the HMC984LP4E has adjustable Charge Pump gain and offset current to improve linearity and performance.
- What is the Soft Reset feature in the HMC984LP4E?
The Soft Reset feature resets all registers to default values without requiring a power cycle.
- In what types of applications is the HMC984LP4E typically used?
The HMC984LP4E is typically used in test equipment, portable instruments, high-performance fractional-N frequency synthesizers, and military applications.
