PDF AD9953 Data sheet ( Hoja de datos )

Número de pieza	AD9953
Descripción	1.8V CMOS Direct Digital Synthesizer
Fabricantes	Analog Devices
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No Preview Available ! FEATURES 400 MSPS internal clock speed Integrated 14-bit DAC 32-bit tuning word Phase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output) Excellent dynamic performance >80 dB SFDR @ 160 MHz (±100 kHz offset) AOUT Serial I/O control 1.8 V power supply Software and hardware controlled power-down 48-lead TQFP/EP package Support for 5 V input levels on most digital inputs 400 MSPS, 14-Bit, 1.8 V CMOS Direct Digital Synthesizer AD9953 PLL REFCLK multiplier (4× to 20×) Internal oscillator, can be driven by a single crystal Phase modulation capability Multichip synchronization APPLICATIONS Agile VHF/UHF LO frequency synthesis FM chirp source for radar and scanning systems Nonlinear-shaped PSK/FSK modulator Test and measurement equipment FUNCTIONAL BLOCK DIAGRAM I/O UPDATE SYNC_CLK REFCLK REFCLK 1024 × 32 STATIC RAM RAM DATA 32 M U X DDS CORE PHASE ACCUMULATOR Z–1 PHASE OFFSET 19 COS(X) AD9953 14 DAC Z–1 32 3 32 10 M0 U X SYNC OSCILLATOR/BUFFER ENABLE 4×–20× CLOCK MULTIPLIER MUX 14 14 RAM DATA <31:18> TIMING AND CONTROL LOGIC PHASE OFFSET WORD ÷ 4 CONTROL REGISTERS M U X SYSTEM CLOCK SYSTEM 14 CLOCK DAC_RSET IOUT IOUT SYNC_IN OSK PWRDWNCTL CRYSTAL OUT PS<1:0> I/O PORT Figure 1. RESET Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2004–2009 Analog Devices, Inc. All rights reserved. 1 page GENERAL DESCRIPTION The AD9953 is a direct digital synthesizer (DDS) featuring a 14-bit DAC operating up to 400 MSPS. The AD9953 uses advanced DDS technology, coupled with an internal high speed, high performance DAC to form a digitally programmable, complete high frequency synthesizer capable of generating a frequency-agile analog output sinusoidal waveform at up to 200 MHz. The AD9953 includes an integrated 1024 × 32 static RAM to support flexible frequency sweep capability in several AD9953 modes. The AD9953 is designed to provide fast frequency hopping and fine tuning resolution (32-bit frequency tuning word). The frequency tuning and control words are loaded into the AD9953 via a serial I/O port. The AD9953 is specified to operate over the extended industrial temperature range of –40°C to +105°C. Rev. A \| Page 3 of 32 5 Page TYPICAL PERFORMANCE CHARACTERISTICS REF 0dBm PEAK 0 LOG 1R 10dB/ –10 –20 ATTEN 10dB MKR1 98.0MHz –70.68dB –30 –40 MARKER 100.000000MHz –50 –70.68dB –60 W1 S2 S3 FC –70 AA –80 1 –90 –100 CENTER 100MHz #RES BW 3kHz VBW 3kHz SPAN 200MHz SWEEP 55.56 s (401 PTS) Figure 4. FOUT = 1 MHz FCLK = 400 MSPS, WBSFDR REF 0dBm PEAK 0 LOG 10dB/ –10 1R –20 ATTEN 10dB MKR1 80.0MHz –69.12dB –30 –40 MARKER 80.000000MHz –50 –69.12dB –60 W1 S2 S3 FC –70 AA –80 1 –90 –100 CENTER 100MHz #RES BW 3kHz VBW 3kHz SPAN 200MHz SWEEP 55.56 s (401 PTS) Figure 5. FOUT = 10 MHz, FCLK = 400 MSPS, WBSFDR REF 0dBm PEAK 0 LOG 10dB/ –10 –20 ATTEN 10dB 1R MKR1 0Hz –68.44dB –30 –40 MARKER 40.000000MHz –50 –68.44dB –60 W1 S2 S3 FC –70 AA –80 1 –90 –100 CENTER 100MHz #RES BW 3kHz VBW 3kHz SPAN 200MHz SWEEP 55.56 s (401 PTS) Figure 6. FOUT = 40 MHz, FCLK = 400 MSPS, WBSFDR AD9953 REF 0dBm PEAK 0 LOG 10dB/ –10 –20 ATTEN 10dB 1R MKR1 80.0MHz –61.55dB –30 –40 MARKER 80.000000MHz –50 –61.55dB –60 W1 S2 S3 FC –70 AA –80 1 –90 –100 CENTER 100MHz #RES BW 3kHz VBW 3kHz SPAN 200MHz SWEEP 55.56 s (401 PTS) Figure 7. FOUT = 80 MHz FCLK = 400 MSPS, WBSFDR REF 0dBm PEAK 0 LOG 10dB/ –10 –20 ATTEN 10dB MKR1 40.0MHz –56.2dB 1R –30 –40 –50 –60 W1 S2 S3 FC –70 AA –80 MARKER 40.000000MHz –56.2dB 1 –90 –100 CENTER 100MHz #RES BW 3kHz VBW 3kHz SPAN 200MHz SWEEP 55.56 s (401 PTS) Figure 8. FOUT = 120 MHz, FCLK = 400 MSPS, WBSFDR REF 0dBm PEAK 0 LOG 10dB/ –10 –20 ATTEN 10dB MKR1 0Hz –53.17dB 1R –30 –40 –50 –60 W1 S2 S3 FC –70 AA –80 MARKER 80.000000MHz –53.17dB 1 –90 –100 CENTER 100MHz #RES BW 3kHz VBW 3kHz SPAN 200MHz SWEEP 55.56 s (401 PTS) Figure 9. FOUT = 160 MHz, FCLK = 400 MSPS, WBSFDR Rev. A \| Page 9 of 32 11 Page

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