CDC421A106 Fully Integrated Fixed Frequency Low-Jitter Crystal Oscillator Clock Generator | TI.com

CDC421A106 (ACTIVE) Fully Integrated Fixed Frequency Low-Jitter Crystal Oscillator Clock Generator

 

Recommended alternative parts

  • CDCM61001  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   CDCM61001 has similar fucntionality with much wider frequency range. CDCM61001 shall recommended over CDC421A106

Description

The CDC421Axxx is a high-performance, low-phase-noise clock generator. It has an integrated low-noise, LC-based voltage-controlled oscillator (VCO) that operates within the 1.75 GHz to 2.35 GHz frequency range. It has an integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable frequency reference for a phase-locked loop (PLL)-based frequency synthesizer. The output frequency (fOUT) is proportional to the frequency of the input crystal (fXTAL).

The device operates in 3.3-V supply environment and is characterized for operation from -40°C to +85°C. The CDC421Axxx is available in a QFN-24 4-mm × 4-mm package.

The CDC421Axxx differs from the CDC421xxx in the following ways:

  • Device Startup
  • The CDC421Axxx has an improved startup circuit to enable correct operation for all power-supply ramp times.

Features

  • Single 3.3-V Supply
  • High-Performance Clock Generator, Incorporating Crystal Oscillator Circuitry with Integrated Frequency Synthesizer
  • Low Output Jitter: As low as 380 fs (RMS integrated between 10 kHz to 20 MHz)
  • Low Phase Noise at 312.5 MHz:
    • Less than -120 dBc/Hz at 10 kHz and -147 dBc/Hz at 10-MHz offset from carrier
  • Supports Crystal or LVCMOS Input Frequencies at 31.25 MHz, 33.33 MHz, and 35.42 MHz
  • Output Frequencies: 100 MHz, 106.25 MHz, 125 MHz, 156.25 MHz, 212.5 MHz, 250 MHz, and 312.5 MHz
  • Differential Low-Voltage Positive Emitter Coupled Logic (LVPECL) Outputs
  • Fully-Integrated Voltage-Controlled Oscillator (VCO): Runs from 1.75 GHz to 2.35 GHz
  • Typical Power Consumption: 300 mW
  • Chip Enable Control Pin
  • Available in 4-mm × 4-mm QFN-24 Package
  • ESD Protection Exceeds 2 kV (HBM)
  • Industrial Temperature Range: -40°C to +85°C
  • APPLICATIONS
    • Low-Cost, Low-Jitter Frequency Multiplier

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Parametrics

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Part number Order Input type Number of outputs Output frequency (Max) (MHz) Programmability Operating temperature range (C) Output type Features VCC out (V) VCC core (V)
CDC421A106 Order now LVCMOS     1     106.25     Chip-enable control pin     -40 to 85     LVPECL     Signal 3.3-V supply     3.3     3.3    
CDC421A100 Samples not available LVCMOS     1     100     Chip-enable control pin     -40 to 85     LVPECL     Signal 3.3-V supply     3.3     3.3    
CDC421A125 Samples not available LVCMOS     1     125     Chip-enable control pin     -40 to 85     LVPECL     Signal 3.3-V supply     3.3     3.3    
CDC421A156 Samples not available LVCMOS     1     156.25     Chip-enable control pin     -40 to 85     LVPECL     Signal 3.3-V supply     3.3     3.3    
CDC421A212 Samples not available LVCMOS     1     212.5     Chip-enable control pin     -40 to 85     LVPECL     Signal 3.3-V supply     3.3     3.3    
CDC421A250 Samples not available LVCMOS     1     250     Chip-enable control pin     -40 to 85     LVPECL     Signal 3.3-V supply     3.3     3.3    
CDC421A312 Samples not available LVCMOS     1     312.5     Chip-enable control pin     -40 to 85     LVPECL     Signal 3.3-V supply     3.3     3.3    
CDCE421A Samples not available LVCMOS     1     1100     EEPROM
Serial interface    
-40 to 85     LVDS     Design tool available     3.3     3.3