AD9957BSVZ

Overview

The AD9957BSVZ is a quadrature digital upconverter featuring an integrated direct digital synthesizer and a 14-bit digital-to-analog converter. It supports a maximum internal clock speed of 1 GSPS, enabling analog outputs up to 400 MHz with an input data rate of 250 MSPS. The device operates on 1.8 V and 3.3 V power supplies within a -40°C to +85°C temperature range. Key specifications include phase noise of ≤ −125 dBc/Hz at a 400 MHz carrier and narrow-band SFDR exceeding 80 dB. It utilizes a 100-lead TQFP_EP package.

Feature Summary

• Integrates a high-speed DDS core with an inverse sinc filter for signal processing.
• Includes eight programmable profiles for rapid shift keying of signal parameters.
• Supports multichip synchronization via dedicated SYNC_IN and SYNC_OUT pins.
• Features an internal reference clock multiplier allowing single crystal operation.

Applications

• HFC data, telephony, and video modems
• Wireless base station transmissions
• Broadband communications transmissions

Procurement Notes

Verify the specific suffix SVZ corresponds to the standard tray packaging configuration when sourcing. Confirm that the component meets RoHS3 compliance requirements for your region. Ensure the ordering documentation explicitly lists the 100-TQFP_EP package type to avoid substitution errors during assembly.

Selection Notes

Select this component for applications requiring agile upconversion with high dynamic performance. Verify that the system can accommodate the required 1.8 V and 3.3 V dual-supply architecture. Ensure the host processor supports the necessary serial interface or parallel data rates for the selected mode of operation.

Part Context

This part belongs to the AD9957 family of quadrature digital upconverters from Analog Devices. It serves as a successor to earlier models like the AD9856 and AD9857, offering improved operating speeds and spectral performance. The BS variant indicates a specific manufacturing lot or revision within the broader AD9957 product line.

Replacement Considerations

Direct replacements within the same family include the AD9956 and AD9957 variants. Verify pin compatibility and register map differences before substituting. Cross-model comparisons should focus on clock speed limits and DAC resolution requirements.

FAQ

What is the maximum analog output frequency?

The maximum analog output frequency is 400 MHz, achieved with a 1 GSPS internal clock speed.

How many programmable profiles are available?

The device provides eight programmable profiles for shift keying operations.

What is the typical phase noise performance?

Phase noise is typically ≤ −125 dBc/Hz at a 400 MHz carrier with a 1 kHz offset.