AD9522-4BCPZ

The AD9522-4BCPZ is a clock generator and fanout distribution IC from Analog Devices. It integrates a phase-locked loop (PLL) and on-chip voltage-controlled oscillator (VCO) that tunes from 1.4 GHz to 1.8 GHz, with a maximum VCO frequency of 1.8 GHz. The device accepts CMOS, LVDS, or LVPECL reference inputs up to 250 MHz or a crystal reference from 16.62 MHz to 33.3 MHz. It provides up to 12 LVDS outputs with frequencies up to 800 MHz, or 24 CMOS outputs when each LVDS output is configured as two CMOS outputs (fOUT ≤ 250 MHz). Additive output jitter is as low as 242 fs rms.

The part features a 2:12 or 2:24 input-to-output ratio, channel-to-channel skew under 60 ps within grouped outputs, and a serial control interface supporting SPI and I2C. It includes reference monitoring, automatic switchover with holdover, and zero delay operation. The device is housed in a 64-lead LFCSP package (9x9 mm, exposed pad) and operates from a 3.135 V to 3.465 V supply over -40°C to +85°C. An on-chip nonvolatile EEPROM stores configuration settings.

This clock generator is suitable for low-jitter clock distribution and generation in high-speed networking and communication systems. Its integrated PLL and VCO reduce external component count while providing flexible output configurations.