ANALOG DEVICES UG-296 Service Manual

Evaluation Board User Guide

UG-296

SYNC SDIN SCLK

SDO LDAC CLR

VDD1 VSSVDD AGND

DAC A

CONNECTOR TO SDP-1Z

V

REF

A V

REF

B

ADR01

REFERENCE

DAC B

AD5449

12-BIT DAC

DAC A

DAC B

AD5415

12-BIT DAC

EVAL-AD5415SDZ

AD8065

I TO V

AD8065

I TO V

AD8065

I TO V

AD8065

I TO V

V

OUT

A

V

OUT

B

V

OUT

A

V

OUT

B

09973-001

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com

Evaluating the AD5415 Serial Input, Dual-Channel Current Output DAC

FEATURES

Full-featured evaluation board for the AD5415
Graphic user interface software for board control and

data analysis

Connector to E VAL-SDP-CB1Z system demonstration

platform board

Various power supply options

APPLICATIONS

Portable battery-powered applications
Waveform generators
Analog processing
Instrumentation applications
Programmable amplifiers and attenuators
Digitally controlled calibration
Programmable filters and oscillators
Composite video
Ultrasound
Gain, offset, and voltage trimming

GENERAL DESCRIPTION

The AD5415 is a CMOS, 12-bit, dual-channel, current output
digital-to-analog converter. This device operates from a 2.5 V to

5.5 V power supply, making it suited to battery-powered and
other applications.

As a result of being manufactured on a CMOS submicron process,
this part offers excellent four-quadrant multiplication character­istics, with large signal multiplying bandwidths of 10 MHz.

The applied external reference input voltage (V

x) determines

REF

the full-scale output current. An integrated feedback resistor
(R

x) provides temperature tracking and full-scale voltage

FB

output when combined with an external current-to-voltage
precision amplifier. In addition, this device contains the four­quadrant resistors necessary for bipolar operation and other
configuration modes.

This DAC uses a double-buffered, 3-wire serial interface that is
compatible with SPI, QSPI™, MICROWIRE®, and most DSP
interface standards. In addition, a serial data out pin (SDO)
allows daisy-chaining when multiple packages are used. Data
readback allows the user to read the contents of the DAC register
via the SDO pin. On power-up, the internal shift register and
latches are filled with 0s, and the DAC outputs are at zero scale.
The AD5415 DAC is available in a 24-lead TSSOP package.

The evaluation board, E VAL -AD5415SDZ, is available for
evaluating the performance of the AD5415 DAC.

EVALUATION BOARD FUNCTIONAL BLOCK DIAGRAM

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.

Rev. B | Page 1 of 12

Figure 1.

UG-296 Evaluation Board User Guide

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Evaluation Board Functional Block Diagram ............................... 1

Revision History ............................................................................... 2

Evaluation Board .............................................................................. 3

System Demonstration Platform ................................................ 3

EVAL-AD5415/AD5449SDZ to SPORT Interface ................... 3

Operating the Evaluation Board ................................................. 3

Serial Interface .............................................................................. 3

Microprocessor Interfacing ......................................................... 3

REVISION HISTORY

3/12—Rev. A to Rev. B

Changed EVAL-AD5415/AD5449SDZ to EVAL-AD5415SDZ

Throughout ....................................................................................... 1

Change to Figure 1 ........................................................................... 1

Changed ADSP-BF5xx to ADSP-BF527 Throughout.................. 3

Change to Figure 2 ........................................................................... 3

Changes to Figure 3 and Installing the Software Section ............ 4

Changes to Using the Evaluation Board Software Section.......... 5

Changes to Evaluation Board Schematics and Artwork

Section ................................................................................................ 8

Evaluation Board Software ...............................................................4

Installing the Software ..................................................................4

Running the Software ...................................................................4

Using the Evaluation Board Software .............................................5

Evaluation Board Functions and Registers ................................5

Evaluation Board Schematics and Artwork ...................................8

Schematics ......................................................................................8

Evaluation Board Layout ........................................................... 10

Related Links ............................................................................... 11

6/11—Rev. 0 to Rev. A
Document Title, Format, and C ontent Changed from

EVAL-AD5415E, Revision 0, to UG-296, Rev. A ........... Universal

3/10—Revision 0: Initial Version

Rev. B | Page 2 of 12

Evaluation Board User Guide UG-296

ADSP-BF527

AD5415

SYNC

SPORT_TFS

SPORT_RFS

SCLK

SPORT_TSCLK
SPORT_RSCLK

SDIN

SPORT_DTO

SDO

SPORT_DRO

LDAC

GPIO1

CLR

GPIO2

09973-002

EVALUATION BOARD

The E VA L -AD5415SDZ board consists of an AD5449 DAC, an

AD5415 DAC, and AD8065 current-to-voltage amplifiers.

Included on the evaluation board is a 10 V reference, the

ADR01. An external reference can also be applied via an SMB

input. The evaluation kit consists of a CD-ROM with self­installing PC software to control the DAC. The software allows
the user to write a code to the device.

The E VA L -AD5415SDZ board is used in conjunction with the

EVAL-SDP-CB1Z system demonstration platform (SDP) board

available from Analog Devices, Inc., which is purchased
separately from the evaluation board. The USB-to-SPI
communication to the AD5415 is completed using this
Blackfin®-based demonstration board. The software offers a
waveform generator.

SYSTEM DEMONSTRATION PLATFORM

The SDP is a hardware and software evaluation tool for use in
conjunction with product evaluation boards. The SDP board
is based on the Blackfin ADSP-BF527 processor with USB
connectivity to the PC through a USB 2.0 high speed port.
For more information about this device, see the system
demonstration platform web page at www.analog.com/EVAL-

SDP-CB1Z.

SERIAL INTERFACE

The AD5415 has an interface that is compatible with SPI, QSPI,
MICROWIRE, and most DSP interface standards. Data is
written to the device in 16-bit words. Each 16-bit word consists
of four control bits and 12 data bits for the AD5415. Control
bits allow control of various functions on the DAC.

MICROPROCESSOR INTERFACING

Microprocessor interfacing to the AD5415 DAC is through a
serial bus that uses a standard protocol compatible with micro­controllers and DSP processors.

The SDP is a hardware and software platform that provides a
means to communicate from the PC to Analog Devices products
and systems that require digital control and/or readback. The
SDP has a Blackfin processor (ADSP-BF527) at its core.

The ADSP-BF527 processor incorporates channel synchronous
serial ports (SPORT) and general-purpose input/output (GPIO)
pins. A serial interface between the Blackfin processor and the

AD5415 DAC is shown in Figure 2.

For more details about the system demonstration platform, see
the EVA L -SDP-CB1Z at www.analog.com/EVAL-SDP-CB1Z.

EVAL-AD5415SDZ TO SPORT INTERFACE

The Analog Devices SDP has one SPORT serial port. The
SPORT interface is used to control the AD5415, allowing clock
frequencies of up to 30 MHz.

OPERATING THE EVALUATION BOARD

The board requires ±12 V and 5 V supplies. The +12 V VDD
and −12 V V
supply is used to power the DAC (V

Both supplies are decoupled to their respective ground plane
with 10 µF tantalum and 0.1 µF ceramic capacitors.

are used to power the output amplifier; the 5 V

SS

) and transceivers (VCC).

DD

Figure 2. ADSP-BF527-to-AD5415 Interface

Rev. B | Page 3 of 12

UG-296 Evaluation Board User Guide

09973-003

09973-004

EVALUATION BOARD SOFTWARE

Figure 3. Device Manager Showing the SDP Board Connected

INSTALLING THE SOFTWARE

The EVAL-AD5415SDZ kit includes the software and drivers on a
CD. To install the software, follow these steps:

1. Install the software before connecting the SDP board to the

USB port of the PC.

2. Start the Windows® operating system and insert the

EVAL-AD5415SDZ kit CD.

3. Download the E VA L -AD5415SDZ LabVIEW™ software.

The correct driver for the SDP board, SDPDriversNET,
should download automatically after LabVIEW is down­loaded, supporting both 32-bit and 64-bit systems.
However, if the drivers do not download automatically,
the driver executable file can also be found in the All
Programs/Analog Devices folder from the Start menu.
Follow the on-screen prompts to install it.

4. After installation of the software and drivers is complete,

plug the EVAL-AD5415SDZ into the SDP board and the
SDP board into the PC using the USB cable included in the
kit. Confirm that the SDP board has been recognized and
is displayed in the Device Manager dialog box by clicking
Start/Control Panel/System (Hardware)/Device Manager
(see Figure 3).

5. When the software detects the evaluation board, proceed

through any dialog boxes that appear to finalize the

installation (Found New Hardware Wizard/Install the
Software Automatically and so on).

RUNNING THE SOFTWARE

To run the evaluation board program, do the following:

1. Click Start/All Programs/Analog Devices/EVAL-

AD5415/49SDZ.

2. If the SDP board is not connected to the USB port when

the software is launched, a connectivity error displays (see
Figure 4.). Simply connect the evaluation board to the USB
port of the PC, wait a few seconds, click Rescan, and follow
the instructions.

Figure 4. Connectivity Error

Rev. B | Page 4 of 12