AD9834BRUZ-REEL7

Overview

The AD9834BRUZ-REEL7 is a complete Direct Digital Synthesis (DDS) device manufactured by Analog Devices Inc. It operates on a 2.3 V to 5.5 V power supply and consumes only 20 mW at 3 V. The device features a 10-bit DAC with an update rate of 75 MSPS, generating sine, triangular, and square wave outputs up to 37.5 MHz. It includes two 28-bit frequency registers and two 12-bit phase registers for precise tuning. Communication is handled via a 3-wire SPI interface compatible with DSP standards. The component is housed in a 20-lead TSSOP package and supports an extended operating temperature range from -40°C to +105°C.

Feature Summary

• Integrated numerically controlled oscillator with 28-bit phase accumulator for high-resolution frequency synthesis.
• On-board comparator enables direct generation of square waves for clock applications.
• Independent analog and digital power supplies allow flexible voltage configurations.
• Dedicated sleep mode allows selective powering down of internal sections to minimize current consumption.

Applications

• Frequency stimulus and waveform generation
• Low power RF and communications systems
• Liquid and gas flow measurement
• Proximity, motion, and defect detection sensory applications

Procurement Notes

Verify the specific grade (B or C) required for your application, as specifications such as Spurious-Free Dynamic Range vary between grades. Confirm that the REEL7 suffix corresponds to the tape and reel packaging format needed for your assembly line. Ensure the ordering documentation matches the exact Analog Devices part number to avoid discrepancies in electrical characteristics.

Selection Notes

Select this component when a low-power DDS solution is required for generating precise sine, triangle, or square waves. It is suitable for designs needing independent analog and digital supply rails. Consider the B or C grade based on the required dynamic performance metrics. Ensure the system can accommodate the 20-lead TSSOP footprint and provides adequate decoupling for the internal regulator.

Part Context

This part belongs to the AD9834 family of Direct Digital Synthesis devices. It is designed to replace traditional frequency synthesizers in applications where size, power consumption, and programmability are critical constraints. The device integrates all necessary components for DDS operation, including the NCO, SIN ROM, and DAC, into a single compact package.

Replacement Considerations

Direct replacements include other parts within the AD9834 family, such as the AD9834ARZ or AD9834BCPZ, depending on the required performance grade and packaging type. Verify pin compatibility and electrical specifications before substituting.