Datasheet > EVAL-AD9837SDZ

EVAL-AD9837SDZ

更新时间： 2024-11-24 10:16:51

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
28页	882K
描述
Low Power, 8.5 mW, 2.3 V to 5.5 V, Programmable Waveform Generator

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EVAL-AD9837SDZ 数据手册

Low Power, 8.5 mW, 2.3 V to 5.5 V,

Programmable Waveform Generator

AD9837

FEATURES

GENERAL DESCRIPTION

Digitally programmable frequency and phase

8.5 mW power consumption at 2.3 V

MCLK speed: 16 MHz (B grade), 5 MHz (A grade)

28-bit resolution: 0.06 Hz at 16 MHz reference clock

Sinusoidal, triangular, and square wave outputs

2.3 V to 5.5 V power supply

3-wire SPI interface

Extended temperature range: −40°C to +125°C

Power-down option

The AD9837 is a low power, programmable waveform generator

capable of producing sine, triangular, and square wave outputs.

Waveform generation is required in various types of sensing,

actuation, and time domain reflectometry (TDR) applications.

The output frequency and phase are software programmable,

allowing easy tuning. The frequency registers are 28 bits wide:

with a 16 MHz clock rate, resolution of 0.06 Hz can be achieved;

with a 5 MHz clock rate, the AD9837 can be tuned to 0.02 Hz

resolution.

10-lead LFCSP

The AD9837 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.

APPLICATIONS

Frequency stimulus/waveform generation

Liquid and gas flow measurement

Sensory applications: proximity, motion,

and defect detection

Line loss/attenuation

Test and medical equipment

The AD9837 has a power-down (sleep) function. Sections of the

device that are not being used can be powered down to minimize

the current consumption of the part. For example, the DAC can

be powered down when a clock output is being generated.

Sweep/clock generators

Time domain reflectometry (TDR) applications

The AD9837 is available in a 10-lead LFCSP_WD package.

FUNCTIONAL BLOCK DIAGRAM

AGND

DGND

VDD

CAP/2.5V

ON-BOARD

REFERENCE

REGULATOR

2.5V

MCLK

AVDD/

DVDD

FULL-SCALE

CONTROL

COMP

28-BIT FREQ0 REG

28-BIT FREQ1 REG

PHASE

ACCUMULATOR

(28-BIT)

SIN

ROM

10-BIT DAC

MUX

MSB

12-BIT PHASE0 REG

12-BIT PHASE1 REG

MUX

DIVIDE

BY 2

VOUT

MUX

16-BIT CONTROL REGISTER

200Ω

SERIAL INTERFACE

AND

CONTROL LOGIC

AD9837

FSYNC

SCLK

SDATA

Figure 1.

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. 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 registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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