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LMX1906-SP
  • LMX1906-SP
  • LMX1906-SP

LMX1906-SP

ACTIVE

Radiation-hardness-assured (RHA) 15GHz buffer, multiplier and divider with SYSREF and FPGA clock

Texas Instruments LMX1906-SP Product Info

1 April 2026 4

Parameters

Frequency (max) (MHz)

15000

Frequency (min) (MHz)

300

Features

Integrated multiplier and divider modes, JESD204B/C SYSREF support, Phase synchronization, RF clock distribution, Radiation hardened, Space Qualified, Space grade, Ultra-low additive jitter

Current consumption (mA)

405

Integrated VCO

No

Operating temperature range (°C)

-55 to 125

Rating

Space

Lock time (µs) (typ) (s)

Loop BW dependent

Package

HTQFP (PAP)-64-144 mm² 12 x 12

Features

  • SMD #5962-23202
    • Total ionizing dose 100krad (ELDRS-free)
    • Single event latch-up (SEL) immune up to 87MeV - cm2 /mg
    • Single event functional interrupt (SEFI) immune up to 87MeV - cm2 /mg
  • Clock buffer for 300MHz to 15GHz frequency
  • Ultra-Low Noise
    • Noise floor of –159dBc/Hz at 6GHz output
    • 36-fs additive jitter (100Hz to fCLK) at 6GHz output
    • 5fs additive jitter (100Hz - 100MHz)
  • 4 high-frequency clocks with corresponding SYSREF outputs
    • Shared divide by 1 (Buffer), 2, 3, 4, 5, and 7
    • Shared programmable multiplier x2, x3, and x4
  • Support pin mode options to configure the device without SPI
  • LOGICLK output with corresponding SYSREF output
    • On separate divide bank
    • 1, 2, 4 pre-divider
    • 1 (bypass), 2, …, 1023 post divider
  • 8 programmable output power levels
  • Synchronized SYSREF clock outputs
    • 508 delay step adjustments of less than 2.5ps each at 12.8GHz
    • Generator and repeater modes
    • Windowing feature for SYSREFREQ pins to optimize timing
  • SYNC feature to all divides and multiple devices
  • 2.5V operating voltage
  • –55ºC to 125ºC operating temperature
  • SMD #5962-23202
    • Total ionizing dose 100krad (ELDRS-free)
    • Single event latch-up (SEL) immune up to 87MeV - cm2 /mg
    • Single event functional interrupt (SEFI) immune up to 87MeV - cm2 /mg
  • Clock buffer for 300MHz to 15GHz frequency
  • Ultra-Low Noise
    • Noise floor of –159dBc/Hz at 6GHz output
    • 36-fs additive jitter (100Hz to fCLK) at 6GHz output
    • 5fs additive jitter (100Hz - 100MHz)
  • 4 high-frequency clocks with corresponding SYSREF outputs
    • Shared divide by 1 (Buffer), 2, 3, 4, 5, and 7
    • Shared programmable multiplier x2, x3, and x4
  • Support pin mode options to configure the device without SPI
  • LOGICLK output with corresponding SYSREF output
    • On separate divide bank
    • 1, 2, 4 pre-divider
    • 1 (bypass), 2, …, 1023 post divider
  • 8 programmable output power levels
  • Synchronized SYSREF clock outputs
    • 508 delay step adjustments of less than 2.5ps each at 12.8GHz
    • Generator and repeater modes
    • Windowing feature for SYSREFREQ pins to optimize timing
  • SYNC feature to all divides and multiple devices
  • 2.5V operating voltage
  • –55ºC to 125ºC operating temperature

Description

The LMX1906-SP is an buffer, divider and multiplier that features high frequency, ultra-low jitter, and SYSREF outputs. This device combined with an ultra-low noise reference clock source is an exemplary design for clocking data converters, especially when sampling above 3GHz. Each of the 4 high frequency clock outputs and additional LOGICLK output is paired with a SYSREF output clock signal. The SYSREF signal for JESD interfaces can either be internally generated or passed in as an input and re-clocked to the device clocks. This device can distribute the multichannel, low skew, ultra-low noise local oscillator signals to multiple mixers by disabling the SYSREF outputs.

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