AD9851BRS

The AD9851BRS is a highly integrated direct digital synthesis (DDS) device from Analog Devices. It combines a 180 MHz clock rate with a selectable 6x reference clock multiplier, an on-chip 10-bit high-performance DAC, and a high-speed comparator with hysteresis. The device provides a 32-bit frequency tuning word and 5-bit phase modulation capability, enabling precise frequency and phase-agile sine wave synthesis.

Key electrical specifications include a spurious-free dynamic range (SFDR) greater than 43 dB at 70 MHz analog output, typical power dissipation of 555 mW at 180 MHz, and a power-down mode consuming only 4 mW at 2.7V. The comparator jitter is less than 80 ps peak-to-peak at 20 MHz. The device supports both parallel and serial loading formats for flexible control interface design.

The AD9851BRS is housed in a 28-lead SSOP package (0.209", 5.30mm width) and is designed for surface mount assembly. It operates over a -40°C to +85°C temperature range and requires a single supply voltage from 2.7V to 5.25V. Typical applications include frequency/phase-agile sine wave generation, clock recovery, and agile local oscillator circuits.