Overview
The HMC988LP3E is an ultra-low noise clock divider and delay device produced by Analog Devices Inc. This versatile component is capable of dividing input clock signals by factors of 1, 2, 4, 8, 16, and 32, and it operates over a frequency range of DC to 4 GHz. The device is housed in a compact 3x3 mm SMT QFN package, making it ideal for applications requiring high functionality in a small form factor.
The HMC988LP3E is designed to meet the stringent requirements of various high-performance applications, including basestation digital pre-distortion paths, high-performance automated test equipment, backplane clock skew management, and phase coherence of multiple clock paths.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency Range | DC to 4 GHz |
| Division Factors | 1, 2, 4, 8, 16, 32 |
| Phase Noise Floor | -170 dBc/Hz @ 100 MHz output, -164 dBc/Hz @ 2 GHz output |
| Integrated Jitter | 35 fs RMS @ 100 MHz output, 13 fs RMS @ 2 GHz output |
| Output Delay Adjustment | 60 steps of ~20 ps |
| Input Interface | LVPECL, LVDS, CML, CMOS compatible |
| Output Driver | LVPECL: 800 mVpp into 50 Ω single-ended (+3 dBm Fo) |
| Supply Voltage | 3.3 V or 5 V with optional on-chip regulator |
| Package Type | 3x3 mm SMT QFN leadless package |
Key Features
- Ultra-low noise performance with phase noise floors of -170 dBc/Hz @ 100 MHz and -164 dBc/Hz @ 2 GHz.
- Adjustable output phase and delay in 60 steps of ~20 ps.
- Clock synchronization function and clock invert option.
- Support for up to 8 addressable devices on a single SPI bus.
- Flexible input interface compatible with LVPECL, LVDS, CML, and CMOS.
- On-chip termination (50 Ω single-ended, 100 Ω differential).
- Optional on-chip regulator for 5 V supply operation.
Applications
- Basestation digital pre-distortion paths (DPD).
- High-performance automated test equipment (ATE).
- Backplane clock skew management.
- Phase coherence of multiple clock paths.
- Clock delay management to improve setup and hold time margins.
- PCB signal flight time offset circuits.
- Track and hold circuits for ADC/DACs.
Q & A
- What is the frequency range of the HMC988LP3E?
The HMC988LP3E operates over a frequency range of DC to 4 GHz.
- What are the division factors supported by the HMC988LP3E?
The device supports division factors of 1, 2, 4, 8, 16, and 32.
- What is the phase noise floor of the HMC988LP3E?
The phase noise floor is -170 dBc/Hz @ 100 MHz output and -164 dBc/Hz @ 2 GHz output.
- How is the output delay adjusted in the HMC988LP3E?
The output delay can be adjusted in 60 steps of ~20 ps.
- What input interfaces are supported by the HMC988LP3E?
The device supports LVPECL, LVDS, CML, and CMOS input interfaces.
- What is the typical output driver specification of the HMC988LP3E?
The output driver is specified as LVPECL: 800 mVpp into 50 Ω single-ended (+3 dBm Fo).
- What supply voltages can the HMC988LP3E operate with?
The device can operate with 3.3 V or 5 V supply, with an optional on-chip regulator for 5 V operation.
- How many devices can be addressed on a single SPI bus?
Up to 8 HMC988LP3E devices can be addressed on a single SPI bus.
- What is the package type of the HMC988LP3E?
The device is housed in a 3x3 mm SMT QFN leadless package.
- What are some typical applications of the HMC988LP3E?
Typical applications include basestation DPD paths, high-performance ATE, backplane clock skew management, and phase coherence of multiple clock paths.
