AD9831ASTZ Analog Devices Inc, AD9831ASTZ Datasheet

AD9831ASTZ

Manufacturer Part Number

AD9831ASTZ

Description

IC DDS 10BIT 25MHZ CMOS 48-LQFP

Manufacturer

Analog Devices Inc

Datasheet

1.AD9831ASTZ-REEL.pdf (7 pages)

Specifications of AD9831ASTZ

Resolution (bits)

10 b

Master Fclk

25MHz

Tuning Word Width (bits)

32 b

Voltage - Supply

2.97 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

48-TQFP, 48-VQFP

Pll Type

Direct Digital Synthesis

Frequency

25MHz

Supply Current

15mA

Supply Voltage Range

2.97V To 5.5V

Digital Ic Case Style

TQFP

No. Of Pins

Operating Temperature Range

-40Â°C To +85Â°C

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

EVAL-AD9831EBZ - BOARD EVALUATION AD9831

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

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AD9831ASTZ-REEL

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INTRODUCTION

This Application Note describes the evaluation board for the

AD9831 Direct Digital Synthesizer (DDS). The AD9831 is a

numerically controlled oscillator employing a phase accumula-

tor, a sine look-up table and a 10-bit D/A converter. The

part can be operated with clock frequencies up to 25 MHz.

Both phase modulation and frequency modulation can be per-

formed with the AD9831. Full data on the AD9831 is avail-

able in the AD9831 datasheet available from Analog Devices

and should be consulted in conjunction with this Application

Note when using the evaluation board.

The evaluation board interfaces to the parallel port of an IBM

compatible PC. Software is available with the evaluation

board which allows the user to easily program the AD9831.

Components on the AD9831 Evaluation Board include a 25

MHz oscillator which provides the MCLK for the AD9831.

The user can remove this oscillator, if required, and drive the

AD9831 with a different clock oscillator or an external clock

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

FEATURES

Full-Featured Evaluation Board for the AD9831

Various Linking Options

PC Software for Control of AD9831

AD9831.EXE

IBM Compatible PC

Evaluation Board Setup

Evaluation Board for the AD9831

source via a BNC connector. Latches (74HC574) are also on

the board, these latches being used to hold the 16-bit data

word being written from the PC to the AD9831.

OPERATING THE AD9831 EVALUATION BOARD

Power Supplies

This evaluation board has two analog power supply inputs:

AVDD and AGND. AVDD equals +5 V or +3.3 V and is

used to provide the AVDD for the AD9831. DGND and

DVDD connections are also available. The DVDD is used to

provide the DVDD for the AD9831, the 25 MHz oscillator

and the DVDD for the logic chips. DGND and AGND are

connected at the AD9831. Therefore, it is recommended not

to connect AGND and DGND elsewhere in the system.

All power supplies are decoupled to ground. AVDD and

DVDD are decoupled using 10 F tantalum capacitors and

0.1 F ceramic capacitors at the input to the evaluation board.

The power supplies are again decoupled using 0.1 F capaci-

tors at the AD9831, the crystal and the logic.

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

Tel: 617/329-4700

Telex: 174059

Parallel Port Centronics

Printer Cable

Direct Digital Synthesizer

AD9831 Evaluation

Board

EVAL-AD9831EB

Cables: ANALOG NORWOOD MASS

Twx: 710/394-6577

REV O

Related parts for AD9831ASTZ

AD9831ASTZ Summary of contents

Page 1

FEATURES Full-Featured Evaluation Board for the AD9831 Various Linking Options PC Software for Control of AD9831 INTRODUCTION This Application Note describes the evaluation board for the AD9831 Direct Digital Synthesizer (DDS). The AD9831 is a numerically controlled oscillator employing ...

Page 2

EVAL-AD9831EB Link and Switch Options There are five link options which must be set for the required operating setup before using the evaluation board. The functions of these options are outlined below. Link No. Function LK1 The PSEL1 input can ...

Page 3

Preliminary Technical Data SET-UP CONDITIONS Care should be taken before applying power and signals to the evaluation board to ensure that all link positions are as per the required operating mode. Table 1 shows the position in which all the ...

Page 4

EVAL-AD9831EB Table 2. 36-Way Connector Pin Funtions PIN NO. MNEMONIC 1 LATCH RESET 19 DGND 20 DGND 21 DGND 22 DGND 23 DGND ...

Page 5

Preliminary Technical Data SOFTWARE DESCRIPTION Included in the EVAL-AD9831EB evaluation board package is a PC-compatible disk which contains software for controlling the AD9831 using the printer port of a PC. The disk contains the executable program which runs under Windows ...

Page 6

EVAL-AD9831EB The AD9831 software also contains a demonstration procedure whereby the AD9831 can be made to step through a series of output frequencies. The user only needs to load the start frequency, the stop frequency and the step size and, ...

Page 7

Preliminary Technical Data 1 LATCH Interface RESET D5 8 LATCH D6 9 LOAD 10K RESET 15 16 ...

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