Volver a Texas Instruments

Texas Instruments LMK04616 Clock Jitter Cleaner

Texas Instruments LMK04616 Clock Jitter Cleaner is a high-performance and low-power jitter cleaner with JESD204B support. The 16 clock outputs can be configured to drive eight JESD204B converters or other logic devices using the device and SYSREF clocks. The 17th output can be configured to provide a signal from PLL2 or a copy from the external VCXO. The LMK04616 features fully integrated PLL1 and PLL2 loop filters, many integrated LDOs, and digital and analog delay. The device also features the flexibility to supply outputs with 3.3V, 2.5V, and 1.8V and the option to generate multiple SYSREF domains simultaneously. These features make the LMK04616 very easy to use.

Features

  • Dual loop PLL architecture
    • 65fs RMS Jitter (10kHz to 20MHz)
    • 85fs RMS Jitter (100Hz to 20MHz)
    • –165dBc/Hz Noise floor at 122.88MHz
  • JESD204B Support
    • Single shot, pulsed, and continuous SYSREF
  • 16 Differential output clocks in 8 frequency groups
    • Programmable output swing between 700mVpp to 1600mVpp
    • Each output pair can be configured to SYSREF clock output
    • 16-Bit channel divider
  • Minimum SYSREF frequency of 25kHz
  • Maximum output frequency of 2GHz
  • Precision digital delay, dynamically adjustable
    • Digital Delay (DDLY) of ½ × clock distribution path frequency (2GHz maximum)
  • 60ps Step analog delay
  • 50% Duty cycle output divides, 1 to 65535 (even and odd)
  • 4 Reference inputs
    • Holdover mode, when inputs are lost
    • Automatic and manual switch-over modes
    • Loss-of-Signal (LOS) detection
  • 1.05W Typical power consumption with 16 outputs active
  • Operates typically from a 1.8V (outputs, inputs) and 3.3V supply (digital, PLL1, PLL2_OSC, PLL2 core)
  • Fully integrated programmable loop filter
  • PLL2
    • PLL2 Phase detector rate up to 250MHz
    • OSCin Frequency-doubler
    • Integrated low-noise VCO
  • Internal power conditioning: better than –80dBc PSRR on VDDO for 122.88MHz differential outputs
  • 3- or 4-Wire SPI interface (4-wire is the default)
  • –40ºC to +85ºC Industrial Ambient Temperature
  • Supports 105ºC PCB temperature (measured at thermal pad)
  • LMK04616: 10mm × 10mm NFBGA-144 package with 0.8mm pitch

Applications

  • Wireless infrastructure like LTE-BTS, small cells, Remote Radio Units (RRU)
  • Data converter and integrated transceiver clocking
  • Networking, SONET/SDH, DSLAM
  • Test and measurement
Publicado: 2017-09-18 | Actualizado: 2024-05-02