AD9552

RECOMMENDED FOR NEW DESIGNS

Oscillator Frequency Up Converter

Analog Devices AD9552 Product Info

10 February 2026 4

Features

Converts a low frequency input reference signal to a high frequency output signal
Input frequencies from 6.6 MHz to 112.5 MHz
Output frequencies up to 900 MHz
Preset pin programmable frequency translation ratios
Arbitrary frequency translation ratios via SPI port
Accepts a crystal resonator and/or an external oscillator as a reference frequency source

Secondary output (either integer-related to the primary output or a copy of the reference input)
RMS jitter: <0.5 ps
SPI-compatible, 3-wire programming interface
Single supply (3.3 V)
Very low power: <400 mW (under most conditions)
Small package size (5 mm × 5 mm)
On-chip VCO

Part details & applications

The AD9552 is a fractional-N phase locked loop (PLL) based clock generator designed specifically to replace high frequency crystal oscillators and resonators. The device employs a sigma-delta (Σ-Δ) modulator (SDM) to accommodate fractional frequency synthesis. The user supplies an input reference signal by connecting a single-ended clock signal directly to the REF pin or by connecting a crystal resonator across the XTAL pins.

The AD9552 is pin programmable, providing one of 64 standard output frequencies based on one of eight common input frequencies. The device also has a 3-wire SPI interface, enabling the user to program custom input-to-output frequency ratios.

The AD9552 relies on an external capacitor to complete the loop filter of the PLL. The output is compatible with LVPECL, LVDS, or single-ended CMOS logic levels, although the AD9552 is implemented in a strictly CMOS process.

The AD9552 is specified to operate over the extended industrial temperature range of −40°C to +85°C.

APPLICATIONS

Cost effective replacement of high frequency VCXO, OCXO, and SAW resonators
Extremely flexible frequency translation with low jitter for SONET/SDH (including FEC) , 10 Gb Ethernet, Fibre Channel, and DRFI/DOCSIS
High-definition video frequency translation
Wireless infrastructure
Test and measurement (including handheld devices)

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