AD9763-EBZ
AD9763-EBZ Datasheet
Using the AD9709, AD9763, AD9765, AD9767 Dual DAC Evaluation Board
| Part | Datasheet |
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AD9763-EBZ |
AD9763-EBZ (pdf) |
| Related Parts | Information |
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AD9765-EBZ |
AD9765-EBZ |
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AD9709-EBZ |
AD9709-EBZ |
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AD9767-EBZ |
AD9767-EBZ |
| PDF Datasheet Preview |
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| AN-555 APPLICATION NOTE One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106 • 781/329-4700 • World Wide Web Site: Using the AD9709, AD9763, AD9765, AD9767 Dual DAC Evaluation Board By Steve Reine and Dawn Ostenberg GENERAL DESCRIPTION The AD9709, AD9763, AD9765 and AD9767 are highspeed, high-performance dual DACs 8-, 10-, 12-, 14bits designed for I/Q transmit applications and for applications where board space is at a premium. The evaluation board allows the user to take full advantage of the various modes in which the AD976x can operate. This includes operation as dual DACs with their own individual digital inputs, as well as interleaved DACs where data is alternately written from digital input Port 1 to either of the two DACs. Information on how to operate the evaluation board is included in this application note. However, for more detailed performance information, the reader should consult the individual data sheets for the AD9709, AD9763, AD9765, and AD9767. WORD GENERATOR CLOCK SOURCE DIGITAL DATA BUS DATA IN DUAL DAC EVALUATION BOARD AVDD DVDD DATA OUT OSCILLOSCOPE SPECTRUM ANALYZER ACOM DCOM ANALOG VDD 3V TO 5V DIGITAL VDD 3V TO 5V Figure Typical Test Setup to Evaluate Performance of AD976x Dual DAC Using Evaluation Board The 8-, 10-, 12-, and 14-bit DACs in this family are all pinfor-pin-compatible and are MSB justified. Therefore, the same evaluation board can be used to evaluate all four parts. EVALUATION SETUP To evaluate the performance of the AD976x dual DAC family, a small set of measurement and signal generation equipment is needed. Figure 1 shows a typical test setup. Power supplies capable of driving from 3 V to 5 V are needed for both analog and digital circuitry on the evaluation board. A signal generator and digital word generator are needed to provide the data and clock inputs. On the output, an oscilloscope or spectrum analyzer may be needed, depending on the type of performance being analyzed. TP10 L1 DVDDIN BEAD BAN-JACK DVDD C9 25V TP37 TP38 TP39 POWER CONNECTIONS The AD9709, AD9763, AD9765, AD9767 dual DACs all have separate digital and analog power and ground pins. Analog and digital power and ground have their own banana-style connectors on the dual DAC evaluation board. The best performance when using the evaluation board is achieved when analog and digital power and ground are connected to separate power supplies. Figure 2 shows the power supply, grounding, and decoupling connections for the evaluation board and for the DAC itself. Note that for best noise rejection on the power supplies, the high value bulk capacitors are placed at the external power connectors, while the smaller value capacitors, needed for high frequency rejection, are located close to the DAC. TP11 L2 AVDD AVDDIN BEAD BAN-JACK TP40 TP41 TP42 BAN-JACK DVDD TP43 DGND BAN-JACK |
| More datasheets: NLP25-7624J | NLP25-7608 | NLP25-7617 | NLP25-7624 | NLP25-7607 | NLP25-7612 | NLP25-7629 | NLP25-7605 | AD9765-EBZ | AD9709-EBZ |
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