AD9834BRU-REEL7

Overview

The AD9834BRU-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 20 mW at 3 V. The device features a 10-bit DAC with an update rate of 75 MSPS, producing sine and triangular outputs up to 37.5 MHz. It includes a 28-bit frequency register for high resolution and an onboard comparator for square wave generation. Communication is handled via a 3-wire SPI interface. 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 direct digital synthesis architecture capable of generating sine, triangular, and square waveforms.
• Low power consumption design suitable for battery-operated or power-sensitive applications.
• Onboard comparator provides digital square wave output derived from the analog signal.
• Flexible serial interface compatible with standard DSP and microcontroller protocols.

Applications

• Frequency stimulus and waveform generation
• Frequency phase tuning and modulation
• Low power RF and communications systems
• Liquid and gas flow measurement
• Test and medical equipment

Procurement Notes

Verify the specific grade (B or C) required for your application, as specifications such as clock speed and spurious-free dynamic range vary between grades. Confirm that the REEL7 suffix indicates tape and reel packaging. Ensure the ordering part number matches the exact voltage and temperature requirements defined in the official datasheet before finalizing procurement.

Selection Notes

Select the AD9834BRU-REEL7 when a low-power DDS solution is needed for frequencies up to 37.5 MHz. Consider the B Grade for 50 MHz clock applications or C Grade for 75 MHz clock operations. Evaluate the need for external filtering to remove spectral images from the current-output DAC. Verify that the 3-wire SPI interface timing meets the system controller's capabilities.

Part Context

This component belongs to the AD9834 series of complete DDS devices. It is designed to replace traditional discrete waveform generators by integrating the phase accumulator, SIN ROM, and DAC into a single chip. The BRU variant specifically denotes the industrial temperature grade and TSSOP-20 package configuration offered by Analog Devices.

Replacement Considerations

Public confirmed substitute part numbers: AD9834BRUZ-REEL7, AD9835BRU-REEL7.