AD9834BRUZ Analog Devices, AD9834BRUZ Datasheet

AD9834BRUZ

Manufacturer Part Number

AD9834BRUZ

Description

Manufacturer

Analog Devices

Datasheet

1.AD9834BRUZ.pdf (20 pages)

Specifications of AD9834BRUZ

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GENERAL DESCRIPTION

The AD9834 is a 50 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

REV. 0

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. 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 companies.

FEATURES

Narrow-band SFDR >72 dB

2.3 V to 5.5 V Power Supply

50 MHz Ref Clock, 0 MHz to 25 MHz Output

Sine Output/Triangular Output

On-Board Comparator

3-Wire SPI

Extended Temperature Range: –40 C to +105 C

Power-Down Option

20 mW Power Consumption at 3 V

20-Lead TSSOP Package

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

Test and Medical Equipment

Defect Detection

FSELECT

MCLK

Interface

28-BIT FREQ0

28-BIT FREQ1

FSYNC

REG

AVDD

SERIAL INTERFACE

CONTROL LOGIC

SCLK

AGND

AND

MUX

12-BIT PHASE0 REG

12-BIT PHASE1 REG

DGND

SDATA

16-BIT CONTROL

ACCUMULATOR

(28-BIT)

PHASE

FUNCTIONAL BLOCK DIAGRAM

REGULATOR

DVDD

PSELECT

MUX

CAP/2.5V

VCC

2.5V

MUX

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 50 MHz

clock rate, resolution of 0.2 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/PSELECT pins,

respectively.

The AD9834 is written to via 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, e.g., AVDD can equal 5 V with

DVDD equal to 3 V.

The AD9834 has a power-down pin (SLEEP) that allows exter-

nal control of the power-down mode. Sections of the device that

are not being used can be powered down to minimize the current

consumption, e.g., the DAC can be powered down when a

clock output is being generated.

The part is available in a 20-lead TSSOP package.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

SLEEP

ROM

SIN

REFERENCE

ON-BOARD

DIVIDED

BY 2

20 mW Power, 2.3 V to 5.5 V,

RESET

MUX

MSB

50 MHz Complete DDS

REFOUT

FULL-SCALE

CONTROL

10-BIT

DAC

COMPARATOR

AD9834

FS ADJUST

COMP

IOUT

IOUTB

SIGN BIT OUT

VIN

AD9834

www.analog.com

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