EVAL-AD9835EB Analog Devices Inc, EVAL-AD9835EB Datasheet

BOARD EVAL FOR AD9835

EVAL-AD9835EB

Manufacturer Part Number
EVAL-AD9835EB
Description
BOARD EVAL FOR AD9835
Manufacturer
Analog Devices Inc
Datasheet

Specifications of EVAL-AD9835EB

Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
a
FEATURES
Full-Featured Evaluation Board for the AD9835
Various Linking Options
PC Software for Control of AD9835
On-Board Patchwork Area
INTRODUCTION
This Application Note describes the evaluation board for
the AD9835 Direct Digital Synthesizer (DDS).
AD9835 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 AD9835.
Full data on the AD9835 is available in the AD9835
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.
evaluation board which allows the user to easily program
the AD9835.
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.
AD 98 35 .E XE
Software is available with the
IB M C o m p a tib le P C
The
Evaluation Board for the AD9835
Components on the AD9835 Evaluation Board include a
50 MHz oscillator which provides the MCLK for the
AD9835.
and drive the AD9835 with a different clock oscillator or
an external clock source via a BNC connector.
buffer is also on the board so that the signals from the
edge connector are buffered.
OPERATING THE AD9835 EVALUATION BOARD
Power Supplies
This evaluation board has two analog power supply inputs:
AV
to provide the AV
connections are also available. The DV
provide the DV
and the DV
are connected under the AD9835. Therefore, it is
recommended not to connect AGND and DGND
elsewhere in the system.
All power supplies are decoupled to ground. AV
DV
0.1µF ceramic capacitors at the input to the evaluation
board.
0.1µF capacitors at the AD9835, 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
DD
DD
and AGND. AV
P a ra lle l P o rt C e n tro n ics
P rin te r C a b le
are decoupled using 10µF tantalum capacitors and
The power supplies are again decoupled using
The user can remove this oscillator, if required,
Direct Digital Synthesizer
DD
for the digital buffer. DGND and AGND
DD
DD
for the AD9835, the 50 MHz oscillator
for the AD9835. DGND and DV
Cables: ANALOG NORWOOD MASS
DD
E valuation B oard
equals +5V or +3.3V and is used
EVAL-AD9835EB
A D 9 8 3 5
Twx: 710/394-6577
DD
is used to
DD
A digital
and
Rev. A
DD

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EVAL-AD9835EB Summary of contents

Page 1

... AD9835, the crystal and the logic tib lle tro n ics P rin One Technology Way; P.O.BOX 9106; Norwood, MA 02062-9106 U.S.A. Tel: 617/329-4700 Telex: 174059 EVAL-AD9835EB A digital equals +5V or +3.3V and is used DD for the AD9835. DGND and used to DD ...

Page 2

... EVAL-AD9835EB LINK AND SWITCH OPTIONS There are four link options which must be set for the required operating setup before using the evaluation board. The functions of these link options are outlined below. Link No. Function LK1 When SELSRC = 0, the PSEL1 input can be controlled by the user via a SMB connector or alternatively, by switch SW1-2. With LK1 in position " ...

Page 3

... SWITCHES There is one switch on the AD9835 evaluation board. This switch is a double throw, end stackable switch. This switch can be used to control the FSELECT, PSEL0 and PSEL1 inputs EVAL-AD9835EB The function of these sockets is Table 3. Socket Functions Connector Functions The Digital The Analog ...

Page 4

... EVAL-AD9835EB SOFTWARE DESCRIPTION The AD9835 evaluatmon board comes with a floppy disk containing software that allows the user to control the AD9835 from an IBM compatible PC. The PC is connected to the evaluation board by a standard Centronics™ printer cable. Installing the Software: The software will run on any IBM compatible PC which meets the following requirements. • ...

Page 5

... SELSRC bit is zero before starting the sweep. Additional Information Information about the current version of software can be gathered from the About Screen (accessed by pressing the About button on the main screen EVAL-AD9835EB 1.00000MHz 1.70000MHz 0.20000MH 1.00000MHz 1.20000MHz 1.40000MHz 1.60000MHz 1 ...

Page 6

...

Page 7

... Way Centronics Connector 3 pin sil header 2 pin sil header jumper 20 pin dil solder socket 14 pin dil solder socket Two Way Terminal Block Each corner - 7 - EVAL-AD9835EB Supplier / No. ADI AD9835 FEC 382-267 FEC 422-708 FEC 571-842 FEC 146-227 FEC 146-224 FEC 643-683 FEC 543-627 ...

Page 8

... EVAL-AD9835EB - 8 - Rev. A ...

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