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Description of AD9957BSVZ

The AD9957BSVZ serves as a general-purpose I/Q modulator and agile upconverter for communications systems where cost, size, power consumption, and dynamic performance are critical.The AD9957BSVZ integrates a high-speed direct digital synthesizer (DDS), a high-performance, high-speed, 14-bit digital-to-analog converter (DAC), a clock-multiplier circuit, digital filters, and other DSP functions on a single chip. It provides baseband upconversion for data transmission in wired or wireless communication systems.

The AD9957 is the third product in the quadrature digital upconverter (QDUC) family, which includes the AD9857 and AD9856. It offers improvements in operating speed, power consumption, and spectral performance. Unlike its predecessors, it supports a 16-bit serial input mode for I/Q baseband data. The device is programmable as either a monophonic sine signal source or as an interpolated DAC.

The reference clock input circuitry includes a crystal oscillator, a high-speed divide-by-two input, and a low-noise PLL for reference clock frequency multiplication.

The user interface for control functions includes a serial port that can be easily configured as the SPORT interface and profile pins of the Blackfin® DSP for quick and easy demodulation of any signal parameter (phase, frequency, or amplitude).

Features of AD9957BSVZ

1 GSPS internal clock speed (up to 400 MHz for analogue output)

Integrated 1 GSPS 14-bit DAC

250 MSPS input data rate

Phase noise ≤ -125 dBc/Hz (400 MHz carrier at 1 kHz offset)

Excellent dynamic performance >80 dB narrowband SFDR

8 shift-keyed programmable profiles

Sin(x)/(x) correction (inverse sinc filter)

Reference clock multiplier

Internal oscillator for single crystal operation

Software and hardware controlled power-down

Integrated RAM

Phase modulation function

Multi-chip synchronisation

Easy interface to Blackfin SPORT

Interpolation factors from 4× to 252×

Interpolation DAC mode

Gain control DAC

Internal divider allows reference frequencies up to 2 GHz

1.8 V and 3.3 V power supplies

100-lead TQFP_EP package

Applications of AD9957BSVZ

HFC data, telephony, and video modems

Wireless base station transmission

Broadband communications transmission

Internet telephony

Functional Block Diagram

Shenzhen Mingjiada Electronics Co., Ltd [Supply] Original Genuine ADI AD9957BSVZ Direct Digital Synthesis IC 14 b 1 GHz 32 b Tuned 100-TQFP-EP (14x14)

Model：AD9957BSVZ

Brand：Analog Devices Inc.

Batch: New

Company Homepage: http://www.hkmjd.com/