AD5932YRUZ-REEL7

Overview

The AD5932YRUZ-REEL7 is a programmable frequency scan waveform generator from Analog Devices, packaged in a 16-lead Pb-free TSSOP. It features a 10-bit DAC with an update rate of 50 MSPS and outputs frequencies up to 25 MHz. The device operates on a power supply ranging from 2.3 V to 5.5 V, consuming typically 6.7 mA during active operation and 20 µA in standby mode. It supports sinusoidal, triangular, and square wave outputs via the VOUT pin and provides digital outputs at MSBOUT and SYNCOUT. The Y-grade version ensures reliable performance across an automotive temperature range of −40°C to +125°C.

Feature Summary

• Generates synthesized analog or digital frequency-stepped waveforms using embedded digital processing.
• Eliminates continuous write cycles by utilizing preprogrammed frequency profiles to free DSP resources.
• Offers phase-continuous waveform generation starting from a known phase for easy phase shift determination.
• Supports both automatic internal frequency stepping and external control via the CTRL pin.

Applications

• Frequency scanning and radar systems
• Network and impedance measurements
• Incremental frequency stimulus applications
• Proximity and motion sensory applications

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the Y grade designation matches the specific automotive temperature range requirements of the target application. Ensure compatibility with the 16-lead TSSOP footprint during PCB layout verification.

Selection Notes

Select this component when a low-power, single-chip solution for programmable frequency sweeps is required without external components. Consider the 10-bit resolution and 25 MHz output limit against system accuracy needs. Verify that the serial interface timing meets the host controller's capabilities for loading the 16-bit data words efficiently.

Part Context

This part belongs to the AD5932 series of direct digital synthesis devices designed for specialized data acquisition tasks. It integrates a 24-bit pipelined DDS core with a 10-bit DAC and onboard reference. The Y variant specifically targets industrial and automotive environments requiring extended temperature stability compared to commercial grades.

Replacement Considerations

The AD5930 serves as a related alternative within the same family, offering similar functionality but housed in a 20-TSSOP package with different pinout characteristics. Designers must evaluate pin compatibility and register mapping differences before substituting these parts in existing designs.

FAQ

How does the AD5932 handle frequency increments?

The device supports two modes: auto-increment, where a single pulse on the CTRL pin triggers the entire scan sequence, and external increment, where each frequency step is triggered by sequential transitions on the CTRL pin.

What is the purpose of the CAP/2.5V pin?

The CAP/2.5V pin connects to an onboard regulator that generates a 2.5 V supply for the digital circuitry from DVDD. It requires a decoupling capacitor, typically 100 nF, connected to DGND.

Can AVDD and DVDD operate at different voltages?

Yes, the analog (AVDD) and digital (DVDD) power supplies are independent and can be operated from different voltage levels within the specified 2.3 V to 5.5 V range.