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AD9834BRUZ
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20 mW Power, 2.3 V to 5.5 V,
75 MHz Complete DDS
AD9834
Rev. C
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.
Trademarks and registered trademarks are the property of their respective owners.
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 ©2003–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Narrow-band SFDR >72 dB
2.3 V to 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 V
20-lead TSSOP
APPLICATIONS
Frequency stimulus/waveform generation
Frequency phase tuning and modulation
Low power RF/communications systems
Liquid and gas flow measurement
Sensory applications: proximity, motion, and defect
detection
Test and medical equipment
GENERAL DESCRIPTION
The AD9834 is a 75 MHz low power DDS device capable of
producing high performance sine and triangular outputs. It also
has an on-board comparator that allows a square wave to be
produced for clock generation. Consuming only 20 mW of power
at 3 V makes the AD9834 an ideal candidate for power-sensitive
applications.
Capability for phase modulation and frequency modulation is
provided. The frequency registers are 28 bits; with a 75 MHz clock
rate, resolution of 0.28 Hz can be achieved. Similarly, with a 1 MHz
clock rate, the AD9834 can be tuned to 0.004 Hz resolution.
Frequency and phase modulation are affected by loading registers
through the serial interface and toggling the registers using
software or the FSELECT pin and PSELECT pin, respectively.
The AD9834 is written to using a 3-wire serial interface. This
serial interface operates at clock rates up to 40 MHz and is
compatible with DSP and microcontroller standards.
The device operates with a power supply from 2.3 V to 5.5 V.
The analog and digital sections are independent and can be run
from different power supplies, for example, AVDD can equal
5 V with DVDD equal to 3 V.
The AD9834 has a power-down pin (SLEEP) that allows
external control of the power-down mode. Sections of the
device that are not being used can be powered down to
minimize the current consumption. For example, the DAC can
be powered down when a clock output is being generated.
The part is available in a 20-lead TSSOP.
FUNCTIONAL BLOCK DIAGRAM
12
Σ
MUX
MUX
COMPARATOR
MSB
CAP/2.5VDVDDAGNDAVDD
MCLK
AD9834
FSYNC SCLK SDATA
COMP
IOUT
IOUTB
DGND
REGULATOR
REFOUT FS ADJUST
VIN
FSELECT
12-BIT PHASE0 REG
12-BIT PHASE1 REG
SLEEP RESETPSELECT
MUX
MUX
MUX
SIGN BIT OUT
VCC
2.5V
ON-BOARD
REFERENCE
16-BIT CONTROL
REGISTER
FULL-SCALE
CONTROL
10-BIT
DAC
DIVIDED
BY 2
SIN
ROM
PHASE
ACCUMULATOR
(28-BIT)
28-BIT FREQ0
REG
28-BIT FREQ1
REG
SERIAL INTERFACE
AND
CONTROL LOGIC
02705-001
Figure 1.

AD9834BRUZ 数据手册

ADI(亚德诺)
32 页 / 0.53 MByte
ADI(亚德诺)
36 页 / 0.96 MByte
ADI(亚德诺)
1 页 / 0.05 MByte
ADI(亚德诺)
4 页 / 0.05 MByte
ADI(亚德诺)
1 页 / 0.2 MByte

AD9834 数据手册

ADI(亚德诺)
ANALOG DEVICES  AD9834BRUZ  芯片, 频率合成器 DDS 10位
ADI(亚德诺)
ANALOG DEVICES  AD9834CRUZ  芯片, 频率合成器, 75MHZ, TSSOP-20
ADI(亚德诺)
20毫瓦功率, 2.3 V至5.5 V , 75 MHz的完整DDS 20 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS
ADI(亚德诺)
20mW,2.3V~5.5V,50MHz频率合成器
ADI(亚德诺)
20毫瓦功率, 2.3 V至5.5 V , 75 MHz的完整DDS 20 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS
ADI(亚德诺)
20毫瓦功率, 2.3 V至5.5 V , 75 MHz的完整DDS 20 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS
ADI(亚德诺)
20毫瓦功率, 2.3 V至5.5 V , 75 MHz的完整DDS 20 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS
ADI(亚德诺)
20毫瓦功率, 2.3 V至5.5 V , 75 MHz的完整DDS 20 mW Power, 2.3 V to 5.5 V,75 MHz Complete DDS
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