CDCE421A Description
The CDCE421A is a high-performance, low phase noise clock generator. It has two fully-integrated, low-noise, LC-based voltage-controlled oscillators (VCOs) that operate in the 1.750-GHz to 2.350-GHz frequency range(1).
CDCE421A Key Features
- 2 Single Supply at 3.3 V for LVPECL or LVDS Operation
- High-Performance Clock Multiplier, Incorporating Crystal Oscillator Circuitry with Integrated Frequency Synthesizer
- Low Output Jitter: 380 fs RMS typical (from 10 kHz to 20 MHz)
- Low Phase Noise at High Frequency (708-MHz LVPECL)
- Typically -109 dBc/Hz at 10 kHz and -146dBc/Hz at 10 MHz from the carrier
- Supports Crystal or LVCMOS Input Frequencies from 27.35 MHz to 38.33 MHz
- Output Frequency Ranges from 10.9 MHz to 766.7 MHz and from 875.2 MHz to 1175 MHz
- Low-Voltage Differential Signaling (LVDS) Output, 100-Ω Differential Off-Chip Termination, 10.9-MHz to 400-MHz Frequency
- Differential Low-Voltage Positive Emitter Coupled Logic (LVPECL) Outputs, 10.9-MHz to 1.175-GHz Frequency Range
- Two Fully-Integrated Voltage-Controlled Oscillators (VCO) Support Wide Output Frequency Range