AD9958BCPZ

Overview

The AD9958BCPZ is a dual-channel direct digital synthesizer (DDS) featuring two synchronized DDS cores operating at a maximum sample rate of 500 MSPS. Each channel integrates a 10-bit digital-to-analog converter (DAC) with individually programmable full-scale currents. The device provides independent frequency, phase, and amplitude control for each channel, utilizing a common system clock to ensure inherent synchronization. It supports up to 16 levels of frequency, phase, or amplitude modulation and linear sweeping capabilities. The serial I/O port offers SPI-compatible operation with 800 Mbps throughput. Power supplies include 1.8 V for the DDS core and 3.3 V for the digital I/O interface.

Feature Summary

• Dual synchronized DDS channels with independent frequency, phase, and amplitude control
• Integrated 10-bit DACs with individually programmable reference currents
• Support for up to 16-level modulation and linear sweep modes
• SPI-compatible serial I/O port with high data throughput

Applications

• Agile local oscillators
• Phased array radars and sonars
• Instrumentation
• Synchronized clocking
• Quadrature communications

Procurement Notes

Verify the specific suffix BCPZ against the manufacturer's ordering guide to confirm package type and temperature range. Ensure the component matches the Rev. C datasheet specifications. Confirm that the DVDD_I/O pin is correctly powered at 3.3 V while the DDS core operates at 1.8 V. Check for any product change notifications related to this part number before procurement.

Selection Notes

Select the AD9958BCPZ when dual-channel synchronization and independent per-channel control are required. Consider the 500 MSPS sample rate and 10-bit DAC resolution for signal generation needs. Evaluate the need for internal PLL multiplication if the reference clock frequency is lower than 125 MHz. Ensure the application can accommodate the 56-lead LFCSP package and thermal requirements.

Part Context

The AD9958 is part of Analog Devices' multi-channel DDS family, designed to address synchronization challenges in complex systems. It shares architectural similarities with the four-channel AD9959 but offers two channels. This device enables correction of signal imbalances caused by analog processing or PCB layout mismatches due to its independent channel controls.

Replacement Considerations

The AD9959 is a compatible alternative offering four synchronized channels instead of two. Verify pin compatibility and register mapping differences between the two devices. Ensure the application benefits from the additional channels or if the dual-channel configuration of the AD9958 is sufficient.