EVAL-AD9830EB Analog Devices Inc, EVAL-AD9830EB Datasheet

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EVAL-AD9830EB

Manufacturer Part Number
EVAL-AD9830EB
Description
Manufacturer
Analog Devices Inc
Datasheet
1.EVAL-AD9830EB.pdf (7 pages)

Specifications of EVAL-AD9830EB

Lead Free Status / Rohs Status
Not Compliant
a
INTRODUCTION
This Application Note describes the evaluation board for the
AD9830 Direct Digital Synthesizer (DDS). The AD9830 is a
numerically controlled oscillator employing a phase
accumulator, a sine look-up table and a 10-bit D/A converter.
The part can be operated with clock frequencies up to 50
MHz. Both phase modulation and frequency modulation can
be performed with the AD9830. Full data on the AD9830 is
available in the AD9830 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 AD9830.
Components on the AD9830 Evaluation Board include a 50
MHz oscillator which provides the MCLK for the AD9830.
The user can remove this oscillator, if required, and drive the
AD9830 with a different clock oscillator or an external clock
This Application Note applies to Version 2 of the AD9830 Evaluation Board
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 AD9830
Various Linking Options
PC Software for Control of AD9830
AD9830.EXE
IBM Compatible PC
Evaluation Board Setup
Evaluation Board for the AD9830
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 AD9830.
OPERATING THE AD9830 EVALUATION BOARD
Power Supplies
This evaluation board has two analog power supply inputs:
AVDD and AGND. AVDD equals +5 V and is used to
provide the AVDD for the AD9830. DGND and DVDD
connections are also available. The DVDD is used to provide
the DVDD for the AD9830, the 50 MHz oscillator and the
DVDD for the logic chips. DGND and AGND are
connected at the AD9830. 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
capacitors at the AD9830, 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
AD9830 Evaluation
EVAL-AD9830EB
Board
Cables: ANALOG NORWOOD MASS
Twx: 710/394-6577
REV 0

EVAL-AD9830EB Summary of contents

Page 1

... AD9830, the crystal and the logic. Evaluation Board Setup IBM Compatible PC Parallel Port Centronics Printer Cable One Technology Way; P.O.BOX 9106; Norwood, MA 02062-9106 U.S.A. Tel: 617/329-4700 Telex: 174059 EVAL-AD9830EB AD9830 Evaluation Board Twx: 710/394-6577 Cables: ANALOG NORWOOD MASS REV 0 ...

Page 2

... EVAL-AD9830EB 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 be controlled by the user via a BNC connector or, alternatively, by switch SW. ...

Page 3

... A2 are being written to, the generated also. On the rising edge of the AD9830 reads in the 16 bit word from the 74HC574 latches along with the address values. RESET Reset. When AD9830 is reset. On reset, the phase 19 accumulator is reset to zero AD7002 EVAL-AD9830EB WR signal RESET is taken low, the REV 0 ...

Page 4

... EVAL-AD9830EB Table 2. 36-Way Connector Pin Funtions PIN NO. MNEMONIC 1 LATCH RESET 19 DGND 20 DGND 21 DGND 22 DGND 23 DGND 24 DGND 25 DGND 26 DGND 27 DGND 28 DGND 29 DGND 30 DGND 31 LOAD 36 WR Note: The remainder of the pins on the 36-way connector are no connects. SOCKETS There are seven sockets relevant to the operation of the AD9830 on this evaluation board ...

Page 5

... Preliminary Technical Data SOFTWARE DESCRIPTION Included in the EVAL-AD9830EB evaluation board package is a PC-compatible disk which contains software for controlling the AD9830 using the printer port of a PC. The disk contains the executable program which runs under Windows and it is advised that the user copy this file to the system hard disk to obtain optimum performance from the software. ...

Page 6

... EVAL-AD9830EB SW or, alternatively, these inputs can be controlled using an external source via the BNC connectors. The AD9830 software also contains a demonstration procedure whereby the AD9830 can be made to step through a series of output frequencies. The user only has to load the start frequency, the stop frequency and the step size, and, the AD9830 software will program the AD9830 appropriately so that a frequency sweep will be performed at the AD9830 output ...

Page 7

... PSEL0 10 FSELECT MCLK 7 MCLK IOUT 3 SLEEP DVDD DGND AGND LK4 6, 13, 29 36, 39, 41, 46 XTAL1 COMPONENT LIST Links LK1 - LK4 LK5 Switch SW Sockets SMB1 - SMB7 Connectors J1 J2 AD7002 EVAL-AD9830EB C4, C5 AVDD SMB5 1 LK5 AVDD C7 DVDD 0 C10 1k R5 SMB6 45 51 SMB7 ...