AD9957BSVZ-REEL

Overview

The AD9957BSVZ-REEL is a quadrature digital upconverter featuring a 1 GSPS internal clock speed and an integrated 14-bit DAC. It supports a 250 MSPS input data rate with phase noise of ≤ −125 dBc/Hz at a 400 MHz carrier. The device operates on 1.8 V and 3.3 V power supplies within a temperature range of -40°C to +85°C. It utilizes a 100-lead TQFP_EP package and includes features such as Sin(x)/(x) correction, reference clock multipliers, and programmable interpolation factors from 4× to 252×.

Feature Summary

• Integrates a high-speed direct digital synthesizer with a 14-bit digital-to-analog converter for baseband upconversion.
• Supports quadrature modulation mode with eight programmable profiles for shift keying applications.
• Includes a reference clock multiplier circuitry allowing single crystal operation and internal oscillator support.

Applications

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

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tray packaging when sourcing components. Confirm that the specific revision matches the required datasheet version F specifications. Ensure compatibility with the 100-lead TQFP_EP footprint during PCB layout validation.

Selection Notes

Select this component for systems requiring agile upconversion with high dynamic performance. Consider the 18-bit I/Q data path and 32-bit tuning word width for precise frequency control. Evaluate power consumption requirements against the specified 1400 mW to 1800 mW in continuous modulation modes.

Part Context

This part belongs to the AD9957 family of quadrature digital upconverters, succeeding models like the AD9857. It provides improved operating speed and spectral performance compared to predecessors. The device is designed for cost-sensitive communication systems where size and power are critical constraints.

Replacement Considerations

Direct substitutes include other members of the AD9957 family, such as the AD9957BSVZ or AD9957BCPZ, depending on the required packaging format. Verify pinout compatibility and electrical specifications before substitution.

FAQ

What is the maximum analog output frequency?

The maximum analog output frequency is up to 400 MHz, despite the 1 GSPS internal clock speed.

Does the device support serial interface modes?

Yes, it supports a 16-bit serial input mode for I/Q baseband data and interfaces easily with Blackfin SPORT.

What is the purpose of the OSK pin?

The OSK (Output Shift Keying) pin controls manual or automatic amplitude sweeping functions using the integrated RAM.