Overview
The HMC988LP3ETR from Analog Devices Inc. is an ultra-low noise clock divider and delay device, designed to operate within a frequency range of DC to 4 GHz. This versatile component is capable of dividing input clocks by factors of 1, 2, 4, 8, 16, and 32, making it highly suitable for various high-performance applications. The device is housed in a compact 3x3 mm QFN leadless SMT package, enhancing its usability in space-constrained designs.
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 fsRMS @ 100 MHz output, 13 fsRMS @ 2 GHz output |
| Output Phase Adjustment | Adjustable with soft/hard reset sync |
| Output Delay Adjustment | 60 steps of ~20 ps |
| Input Interface Compatibility | LVPECL, LVDS, CML, CMOS |
| Supply Voltage | 3.3 V or 5 V with optional on-chip regulator |
| Package Type | 3x3 mm QFN leadless SMT |
Key Features
- Ultra-low noise performance with phase noise floors of -170 dBc/Hz @ 100 MHz and -164 dBc/Hz @ 2 GHz.
- Integrated jitter of 35 fsRMS @ 100 MHz and 13 fsRMS @ 2 GHz.
- Adjustable output phase and delay in 60 steps of ~20 ps.
- Clock synchronization function and clock invert option.
- Flexible input interface compatible with LVPECL, LVDS, CML, and CMOS.
- On-chip termination (50 Ω single-ended, 100 Ω differential).
- Up to 8 addressable devices per SPI bus.
- Optional on-chip regulator for 5 V supply operation.
Applications
- Basestation Digital Pre-Distortion (DPD) paths.
- 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 HMC988LP3ETR? The HMC988LP3ETR operates within a frequency range of DC to 4 GHz.
- What are the division factors supported by the HMC988LP3ETR? The device supports division factors of 1, 2, 4, 8, 16, and 32.
- What is the phase noise floor of the HMC988LP3ETR? The phase noise floor is -170 dBc/Hz @ 100 MHz output and -164 dBc/Hz @ 2 GHz output.
- What is the integrated jitter of the HMC988LP3ETR? The integrated jitter is 35 fsRMS @ 100 MHz output and 13 fsRMS @ 2 GHz output.
- Can the output phase and delay be adjusted? Yes, the output phase and delay can be adjusted with soft/hard reset sync and in 60 steps of ~20 ps, respectively.
- What input interfaces are supported by the HMC988LP3ETR? The device supports LVPECL, LVDS, CML, and CMOS input interfaces.
- What are the supply voltage options for the HMC988LP3ETR? The device can operate with a 3.3 V supply or a 5 V supply using the optional on-chip regulator.
- How many devices can be addressed per SPI bus? Up to 8 devices can be addressed per SPI bus.
- What is the package type of the HMC988LP3ETR? The device is housed in a 3x3 mm QFN leadless SMT package.
- What are some typical applications of the HMC988LP3ETR? Typical applications include basestation DPD paths, high-performance ATE, backplane clock skew management, and phase coherence of multiple clock paths.
