Overview
The HMC7044LP10BE from Analog Devices Inc. is a high-performance, dual-loop, integer-N jitter attenuator designed to generate ultralow phase noise frequencies. This device is particularly suited for high-speed data converters with either parallel or serial (JESD204B type) interfaces. It features two integer mode PLLs and overlapping on-chip VCOs that are SPI-selectable, offering wide tuning ranges around 2.5 GHz and 3 GHz, respectively. The HMC7044 is optimized for GSM and LTE base station designs, providing a comprehensive set of clock management and distribution features to simplify baseband and radio card clock tree designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Clock Frequency | - | - | 6000 MHz | - | External VCO input |
| Input Signal Types | - | - | - | - | LVDS, LVPECL, CMOS, CML |
| Output Clocks | - | - | 14 | - | Low noise and configurable |
| Digital Input Voltage (VIH) | 1.2 VCC | - | - | V | Input Logic High |
| Digital Input Voltage (VIL) | 0 | - | 0.5 V | V | Input Logic Low |
| SPI Bus Frequency | - | - | 10 MHz | - | - |
| Package Type | - | - | - | - | 68-Lead QFN (10mm x 10mm w/ EP) |
Key Features
- High-performance, dual-loop, integer-N jitter attenuator
- Support for up to 4 input clocks in LVDS, LVPECL, CMOS, and CML modes
- Frequency holdover mode to maintain output frequency
- Loss of signal (LOS) detection and hitless reference switching
- 4× GPIOs for alarms/status indicators
- External VCO input to support up to 6000 MHz
- On-board regulators for excellent PSRR
- SPI-selectable VCOs with wide tuning ranges around 2.5 GHz and 3 GHz
- 14 low noise and configurable output clocks
- Support for JESD204B and JESD204C signaling standards
Applications
- Cellular infrastructure (multicarrier GSM, LTE, W-CDMA)
- Data converter clocking
- Microwave baseband cards
- Phase array reference distribution
- Baseband and radio card clock tree designs in GSM and LTE base stations
Q & A
- What is the primary function of the HMC7044LP10BE?
The HMC7044LP10BE is a high-performance, dual-loop, integer-N jitter attenuator designed to generate ultralow phase noise frequencies for high-speed data converters.
- What types of input clocks does the HMC7044LP10BE support?
The device supports input clocks in LVDS, LVPECL, CMOS, and CML modes.
- How many output clocks does the HMC7044LP10BE provide?
The device provides 14 low noise and configurable output clocks.
- What is the maximum frequency supported by the external VCO input?
The external VCO input supports frequencies up to 6000 MHz.
- What signaling standards are supported by the DCLK and SYSREF clock outputs?
The DCLK and SYSREF clock outputs support signaling standards such as CML, LVDS, LVPECL, and LVCMOS.
- What is the package type of the HMC7044LP10BE?
The device is packaged in a 68-Lead QFN (10mm x 10mm w/ EP).
- Does the HMC7044LP10BE have on-board regulators?
Yes, the device includes on-board regulators for excellent PSRR.
- What is the purpose of the frequency holdover mode in the HMC7044LP10BE?
The frequency holdover mode is used to maintain the output frequency in case of input clock loss.
- Does the HMC7044LP10BE support JESD204B and JESD204C?
Yes, the device supports both JESD204B and JESD204C signaling standards.
- What are some common applications of the HMC7044LP10BE?
Common applications include cellular infrastructure, data converter clocking, microwave baseband cards, and phase array reference distribution.
