AD9834BRUZ Analog Devices Inc, AD9834BRUZ Datasheet
AD9834BRUZ
Specifications of AD9834BRUZ
Available stocks
Related parts for AD9834BRUZ
AD9834BRUZ Summary of contents
Page 1
FEATURES Narrow-band SFDR > 5.5 V power supply Output frequency up to 37.5 MHz Sine output/triangular output On-board comparator 3-wire SPI® interface Extended temperature range: −40°C to +105°C Power-down option 20 mW power consumption at 3 ...
Page 2
AD9834 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Timing Characteristics ................................................................ 5 Absolute Maximum Ratings ............................................................ 6 ESD Caution .................................................................................. 6 Pin ...
Page 3
SPECIFICATIONS VDD = 2 5.5 V, AGND = DGND = Table 1. Parameter 2 SIGNAL DAC SPECIFICATIONS Resolution Update Rate 3 I Full Scale OUT V Max OUT V Min OUT 4 Output Compliance DC ...
Page 4
AD9834 2 Parameter Grade C Grade Grade C Grade Low Power Sleep Mode B Grade C Grade 1 B grade: MCLK = 50 MHz; C grade: MCLK = 75 ...
Page 5
TIMING CHARACTERISTICS DVDD = 2 5.5 V, AGND = DGND = 0 V, unless otherwise noted. Table 2. 1 Parameter Limit MIN MAX t 20/13 ...
Page 6
AD9834 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter AVDD to AGND DVDD to DGND AVDD to DVDD AGND to DGND CAP/2.5V Digital I/O Voltage to DGND Analog I/O Voltage to AGND Operating Temperature Range ...
Page 7
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Function ANALOG SIGNAL AND REFERENCE 1 FS ADJUST Full-Scale Adjust Control. A resistor (R of the full-scale DAC current. The relationship between R IOUT FULL SCALE V ...
Page 8
AD9834 Pin No. Mnemonic Function 13 SDATA Serial Data Input. The 16-bit serial data-word is applied to this input. 14 SCLK Serial Clock Input. Data is clocked into the AD9834 on each falling SCLK edge. 15 FSYNC Active Low Control ...
Page 9
TYPICAL PERFORMANCE CHARACTERISTICS 4 25°C A 3.5 3.0 2.5 5V 2.0 1.5 1.0 0 MCLK FREQUENCY (MHz) Figure 7. Typical Current Consumption (I 4 25°C A 3.5 3.0 2.5 2.0 1.5 ...
Page 10
AD9834 1000 950 900 850 800 750 5.5V 700 650 600 550 500 –40 25 TEMPERATURE (°C) Figure 13. Wake-Up Time vs. Temperature 1.250 1.225 UPPER RANGE 1.200 1.175 LOWER RANGE 1.150 1.125 1.100 –40 25 TEMPERATURE (°C) Figure 14. ...
Page 11
RWB 1k VWB 300 FREQUENCY (Hz) Figure 19 MHz 1.43 MHz = f MCLK OUT Frequency Word = 2492492 0 –10 –20 –30 ...
Page 12
AD9834 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 0 RWB 1k VWB 300 FREQUENCY (Hz) Figure 25 MHz 7.143 MHz = f MCLK OUT Frequency Word = 2492492 0 –10 –20 ...
Page 13
TERMINOLOGY Integral Nonlinearity (INL) Integral nonlinearity is the maximum deviation of any code from a straight line passing through the endpoints of the transfer function. The endpoints of the transfer function are zero scale, a point 0.5 LSB below the ...
Page 14
AD9834 THEORY OF OPERATION Sine waves are typically thought of in terms of their magnitude form a(t) = sin (ωt). However, these are nonlinear and not easy to generate except through piecewise construction. On the other hand, the angular information ...
Page 15
CIRCUIT DESCRIPTION The AD9834 is a fully integrated direct digital synthesis (DDS) chip. The chip requires one reference clock, one low precision resistor, and eight decoupling capacitors to provide digitally created sine waves up to 37.5 MHz. In addition to ...
Page 16
AD9834 The AD9834 is a sampled signal with its output following Nyquist sampling theorem. Specifically, its output spectrum contains the fundamental plus aliased signals (images) that occur at multiples of the reference clock frequency and the selected output frequency. A ...
Page 17
FUNCTIONAL DESCRIPTION SERIAL INTERFACE The AD9834 has a standard 3-wire serial interface that is com- patible with SPI, QSPI™, MICROWIRE™, and DSP interface standards. Data is loaded into the device as a 16-bit word under the control of a serial ...
Page 18
AD9834 SLEEP12 SLEEP1 PHASE ACCUMULATOR (28-BIT) MODE + OPBITEN SIGN/PIB OPBITEN DB15 DB14 DB13 DB12 DB11 0 0 B28 HLB FSEL Table 6. Description of Bits in the Control Register Bit Name Description DB13 B28 Two write operations are required ...
Page 19
Bit Name Description DB5 OPBITEN The function of this bit is to control whether there is an output at the SIGN BIT OUT pin. This bit should remain the user is not using the SIGN BIT OUT ...
Page 20
AD9834 WRITING TO A FREQUENCY REGISTER When writing to a frequency register, Bit DB15 and Bit DB14 give the address of the frequency register. Table 10. Frequency Register Bits DB15 DB14 DB13 . . . DB0 FREQ0 ...
Page 21
Table 16. Applying the SLEEP Function SLEEP SLEEP1 SLEEP12 PIN/SW Pin Bit Bit Bit DAC Powered ...
Page 22
AD9834 APPLICATIONS Because of the various output options available from the part, the AD9834 can be configured to suit a wide variety of applications. One of the areas where the AD9834 is suitable is in modulation applications. The part can ...
Page 23
INITIALIZATION APPLY RESET USING CONTROL BIT (CONTROL REGISTER WRITE) RESET = 1 PIN/ WRITE TO FREQUENCY AND PHASE REGISTERS FREQ0 REG = F FREQ1 REG = F PHASE0 AND PHASE1 REG = (PHASESHIFT × 2 (SEE FIGURE 32) ...
Page 24
AD9834 SELECT DATA SOURCES YES SET FSELECT FSELECT AND PSELECT AND PSELECT PINS BEING USED? NO (CONTROL REGISTER WRITE) PIN/ (CONTROL REGISTER WRITE) SET FSEL BIT SET PSEL BIT Figure 34. Selecting Data Sources Rev Page ...
Page 25
GROUNDING AND LAYOUT The printed circuit board that houses the AD9834 should be designed so that the analog and digital sections are separated and confined to certain areas of the board. This facilitates the use of ground planes that can ...
Page 26
AD9834 INTERFACING TO MICROPROCESSORS The AD9834 has a standard serial interface that allows the part to interface directly with several microprocessors. The device uses an external serial clock to write the data/control information into the device. The serial clock can ...
Page 27
AD9834 TO 80C51/80L51 INTERFACE Figure 37 shows the serial interface between the AD9834 and the 80C51/80L51 microcontroller. The microcontroller is operated in Mode 0 so that TXD of the 80C51/80L51 drives SCLK of the AD9834, and RXD drives the serial ...
Page 28
AD9834 EVALUATION BOARD The AD9834 evaluation board allows designers to evaluate the high performance AD9834 DDS modulator with a minimum of effort. To prove that this device meets the user’s waveform synthesis requirements, the system only requires a power supply, ...
Page 29
Figure 39. Evaluation Board Layout Rev Page AD9834 02705-039 ...
Page 30
AD9834 BILL OF MATERIALS Table 19. Item Qty Reference Designation Not shown in schematic XTAL1 1 Not shown in schematic 5 8 C1, C2, C4, C5, C6, C7, ...
Page 31
... OUTLINE DIMENSIONS COPLANARITY ORDERING GUIDE Maximum 1 Model MCLK AD9834BRU 50 MHz AD9834BRU-REEL 50 MHz AD9834BRU–REEL7 50 MHz AD9834BRUZ 50 MHz AD9834BRUZ-REEL 50 MHz AD9834BRUZ–REEL7 50 MHz AD9834CRUZ 75 MHz AD9834CRUZ–REEL7 75 MHz EVAL-AD9834EBZ 75 MHz RoHS Compliant Part. 6.60 6.50 6. 4.50 4.40 4.30 6.40 BSC 1 10 PIN 1 ...
Page 32
AD9834 NOTES ©2003–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D02705-0-4/10(B) Rev Page ...