AD9522-3 is a 12-channel LVDS/24-channel CMOS output clock generator produced by ADI. It has an integrated 2GHz VCO, supports a frequency range of 1.72-2.25GHz, supports CMOS, LVPECL or LVDS reference signals, and supports 16.62-33.3MHz crystal inputs. It supports optional reference clock doubling, automatic and manual reference switching, automatic recovery and digital or analog lock detection.
The AD9522-3 provides a multi‑output clock distribution function with sub‑picosecond jitter performance. It features an on‑chip VCO that tunes from 1.72 GHz to 2.25 GHz and supports an external 3.3 V/5 V VCO/VCXO up to 2.4 GHz. Twelve LVDS outputs are grouped into four sets, each with programmable dividers and phase delay, and each LVDS output can be reconfigured as two CMOS outputs for frequencies below 250 MHz.
Typical applications include low‑jitter clock distribution for high‑speed serial links (SONET, 10 GbE, 10 G Fibre Channel), clocking of high‑speed ADCs/DACs, DDS, DDC/DUC, wireless transceivers, and test instrumentation. The device operates from a single 3.3 V supply, supports both SPI and I²C serial control, and includes an on‑package EEPROM for configuration storage.
| On‑chip VCO frequency range | 1.72 GHz – 2.25 GHz |
|---|---|
| Maximum LVDS output frequency | 800 MHz |
| Phase noise @ 1 kHz offset (LVDS output) | ‑62 dBc/Hz |
| Supply voltage (VS) | 3.3 V ±5 % (3.135 V – 3.465 V) |
| Reference input frequency range | 0 – 250 MHz |
The on‑chip VCO can be tuned from 1.72 GHz to 2.25 GHz.
The device provides twelve LVDS outputs, organized into four groups of three.
Each LVDS channel can output up to 800 MHz.
It operates from a 3.3 V supply with a tolerance of ±5 % (3.135 V – 3.465 V).