AD9834BRUZ-REEL

Overview

The AD9834BRUZ-REEL is a complete Direct Digital Synthesis (DDS) device manufactured by Analog Devices Inc. It operates with a power supply range of 2.3 V to 5.5 V and consumes only 20 mW at 3 V. The device features a 10-bit DAC, a 28-bit phase accumulator, and supports output frequencies up to 37.5 MHz with a master clock rate of 75 MHz. It provides sine, triangular, and square wave outputs via an on-board comparator. Communication is handled through a 3-wire SPI interface compatible with DSP and microcontroller standards. The component is housed in a 20-lead TSSOP package and functions within an extended temperature range of −40°C to +105°C.

Feature Summary

• Generates high-performance sine and triangular waveforms using a 10-bit current-steering DAC.
• Includes an integrated comparator for generating square wave signals suitable for clock applications.
• Supports frequency and phase modulation capabilities controlled via serial interface or hardware pins.
• Features independent analog and digital power supplies allowing flexible voltage configurations.

Applications

• Frequency stimulus and waveform generation
• Frequency phase tuning and modulation
• Low power RF and communications systems
• Liquid and gas flow measurement
• Sensory applications including proximity, motion, and defect detection

Procurement Notes

Verify the specific grade (B or C) required for your application, as performance specifications such as Spurious-Free Dynamic Range vary between grades. Confirm that the ordering suffix matches the reel packaging format. Ensure the design accounts for the separate AVDD and DVDD supply requirements and proper decoupling capacitor placement near the power pins.

Selection Notes

Select the B Grade version if operation requires a master clock of 50 MHz, or the C Grade version for clocks up to 75 MHz. Consider the narrow-band SFDR requirements when choosing between grades. Ensure the external load resistor connected to IOUT and IOUTB is approximately 200 ohms to meet output compliance specifications. Verify that the system can accommodate the 20-lead TSSOP footprint.

Part Context

This component belongs to the AD9834 family of low-power DDS devices designed for precise frequency synthesis. It integrates a numerically controlled oscillator, SIN ROM, and DAC into a single chip. The BRUZ suffix indicates the industrial temperature grade and TSSOP package type. The REEL designation specifies the tape and reel packaging configuration for automated assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.