MikroElektronika DAC click Manual de usuario

1. Introduction

DAC Click is an accessory board in mikroBus™

form factor. It includes a 12-bit Digital-to-

Analog Converter MCP4921 that features

SPI interface and an optional double buered

output. The board provides high accuracy

and low noise performance for industrial

applicationswherecalibrationorcompensation

of signals, such as temperature, pressure and

humidity, are required. Board is set to use

3.3V power supply by default. Solder PWR

SEL SMD jumper to 5V position if used with

5V systems.

Once you have soldered the headers your

board is ready to be placed into desired

mikroBUS™ socket. Make sure to align the

cut in the lower-right part of the board

with the markings on the silkscreen at the

mikroBUS™ socket. If all the pins are aligned

correctly, push the board all the way

into the socket.

3. Plugging the board in

2 3

2. Soldering the headers

4. Creating Output Voltages

Board contains two analog output screw

terminals: Vout and GND. Data in 12-bit

format is sent to the DAC using SPI

communication interface. This data is

converted to the appropriate voltage level

in the range between GND and REFERENCE

(VCC or 4.096V), which is proportional to the

received 12-bit number.

Turn the board upward again. Make sure

to align the headers so that they are

perpendicular to the board, then solder the

pins carefully.

Turn the board upside down, so that

bottom side is facing you upwards. Place

shorter parts of the header pins in the

both soldering pad locations.

Before using your click board, make sure

to solder the provided 1x8 male headers

to both sides of the board. Two 1x8 male

headers are included with the board in

the package.

DAC click

Front and back side appearance

of the DAC click Board

click

BOARD

www.mikroe.com

DAC click Manual

ver. 1.00

0 100000 020050

8. Support

MikroElektronika oers Free Tech Support

(www.mikroe.com/esupport) until the

end of product lifetime, so if something goes

wrong, we are ready and willing to help!

7. Code Examples

.com

Once you have done all the necessary

preparations, it’s time to get your click

board up and running. We have provided

the examples for mikroC, mikroBasic and

mikroPascal compilers on our Libstock

website. Just download them and you are

ready to start.

6. SMD Jumpers

There are two zero-ohm resistors (SMD

jumpers): PWR SEL is used to determine

whether 5V or 3.3V power supply is used, and

REFERENCE to select either VCC or 4.096V as

the voltage reference.

CS#

RST

SCK

MOSI

MISO

+3.3V

GND

PWM

INT

SCL

SDA

+5V

GND

VCC

+5V+3V3

2K2

VCC

PWR

VCC

100nF

VIN

VOUT

VSS

REF1

MCP1541

10uF

100

4.096V

NOTE: 4.096V reference can be used only when

5V power supply is provided to the board

VCC

VREF

VCC-REF

VCC

SCK

SDI

VDD

SCK

SDI

VREF

LDAC

GND

VOUT

MCP4921

CN2

10K

100K

CS#

SCK

SDI

VCC

VREF

5. DAC click Board Schematics

MikroElektronika assumes no responsibility or liability for any errors or inaccuracies that may appear in the present document.

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