DAC53608: Digital to analog converter

Salam Alabassi

Part Number: DAC53608

Dear All.
I want to control 10 bits DAC by Arduino using wire library.
I read the data sheet of the DAC53608 carefully and wrote the following code to get 5 volts.

#include <Wire.h>
byte DAC= 0x48; //DAC_Address
byte command;//Config_Device and Output_Address
byte data1;//Data_LSB
byte data2;//Data_MSB

void setup() {
Serial.begin(9600);
Wire.begin();
command=0x01;
data1=0x00;
data2=0xFE;
delay(2000);

Wire.beginTransmission(DAC);
Wire.write(command);
Wire.write(data1);
Wire.write(data2);
Wire.endTransmission();
Serial.println("Device Config is DONE");

}

void loop() {

command=0x08;
data1=0xff;
data2=0xff;

Wire.beginTransmission(DAC);
Wire.write(command);
Wire.write(data1);
Wire.write(data2);
Wire.endTransmission();

}

```

but there is no signal.
Does anyone face the same problem?

over 2 years ago

0 Akhilesh K over 2 years ago

TI__Mastermind 18546 points

Hi,

Can you please share your schematics? What is the reference voltage?

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

Thank you for your answer. Please see the image below

0 Akhilesh K over 2 years ago in reply to Salam Alabassi

TI__Mastermind 18546 points

Hi,

What is the voltage applied on VDD and VREF_IN?

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

Vdd= 5 volts..and tried with 3.3 volts

Vref in = is open circuit and tried with GND and and Vdd

0 Akhilesh K over 2 years ago in reply to Salam Alabassi

TI__Mastermind 18546 points

Hi,

Connect VDD and VREF_IN to 5V and write the following. Also both /LDAC and /CLR should be pulled high.

A0 should be high so that I2C address becomes 0x49 ( 7 bit address)

1. address 0x01, device config register write 0x0000

2. Next write DAC_DATA in any of the channel (for example, in address 0x08, write 0xFFFF.

You should see approx 5V in channel 0.

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

Thank you so much for your reply.
I tried your suggestion but unfortunately it did not work. I am really confused

0 Akhilesh K over 2 years ago in reply to Salam Alabassi

TI__Mastermind 18546 points

Hi,

Please probe all the signals and make sure its correct

/LDAC, /CLR and VREF and A0

You need to change your address as 0x49, Your code was wrong, 0x01 should be 0x0000,

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

Hi,
I probed the all pins, they are 5 volts (/LDAC, /CLR, VREF, Ao).
the code is as following:

0 Akhilesh K over 2 years ago in reply to Salam Alabassi

TI__Mastermind 18546 points

Hi,

Are the logic levels are correct from your controller?

As per the screen shot, I can see max levels are 500mV only or scope has some attenuation set to?

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

yes it is correct, the value must be amplified 10 times so it is 5000 mV.

Regards
Salam

0 Akhilesh K over 2 years ago in reply to Salam Alabassi

TI__Mastermind 18546 points

Hi,

Understood, Code wise everything looks fine to me. Can you read back the device ID to see the device responds to I2C commands?

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

first, I checked the address of the DAC by I2C scanner, when connected A0 to GND, I got 0x48 and when A0 connected to VDD, the address was 0x49.
then I checked the response of the DAC when I sent the SCL 8 bits then waiting for ack signal from the DAC. if I enable the DAC, the ACK received but when the DAC is off, so there is no ACK then the controller does not send more SCL bits.

Best Regards
Salam

0 Akhilesh K over 2 years ago in reply to Salam Alabassi

TI__Mastermind 18546 points

Hi,

This means device is responding correctly. What is the value of the capacitor connected to VDD and VREF?

Please do the following debug. Instead of sending data to channel 0, try to broadcast the DATA by writing into 0x03?

Also as debug, avoid the loop and put everything in void setup()

#include <Wire.h>


//I2C address definitions
#define I2C_ADDR_ALO 0x49 //I2C address definitions

void setup()
{

  int MSB=0, LSB=0; //MSB, LSB variables for reading back registers

  Serial.begin(9600);
  Serial.print("Programming...");
  Wire.begin(); // join i2c bus (address optional for master)

  //Power-up the device and channels
  //WRITE DEVICE_CONFIG(0x01), 0x0000
  Wire.beginTransmission(I2C_ADDR_ALO); 
  Wire.write(byte(0x01)); // DEVICE_CONFIG Register
  Wire.write(byte(0x00)); // 
  Wire.write(byte(0x00)); //
  Wire.endTransmission(); // stop transmitting

  //Program 2.625V on channel A
  //WRITE DACA_DATA(0x08), 0x0868 //10-bit MSB aligned
  Wire.beginTransmission(I2C_ADDR_ALO);
  Wire.write(byte(0x08)); // DACA_DATA Register
  Wire.write(byte(0x08)); //
  Wire.write(byte(0x68)); // 
  Wire.endTransmission(); // stop transmitting
  
  Serial.println("Done");
  
void loop()
{

}

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

the capacitor value is 0.1uF.

do you mean? I should send 0x03 instead of config device ? or address of channel 0?
like this?

#include <Wire.h>


//I2C address definitions
#define I2C_ADDR_ALO 0x49 //I2C address definitions

void setup()
{

  int MSB=0, LSB=0; //MSB, LSB variables for reading back registers

  Serial.begin(9600);
  Serial.print("Programming...");
  Wire.begin(); // join i2c bus (address optional for master)

  //Power-up the device and channels
  //WRITE DEVICE_CONFIG(0x01), 0x0000
  Wire.beginTransmission(I2C_ADDR_ALO); 
  Wire.write(byte(0x03)); // DEVICE_CONFIG Register
  Wire.write(byte(0x00)); // 
  Wire.write(byte(0x00)); //
  Wire.endTransmission(); // stop transmitting

  //Program 2.625V on channel A
  //WRITE DACA_DATA(0x08), 0x0868 //10-bit MSB aligned
  Wire.beginTransmission(I2C_ADDR_ALO);
  Wire.write(byte(0x08)); // DACA_DATA Register
  Wire.write(byte(0x08)); //
  Wire.write(byte(0x68)); // 
  Wire.endTransmission(); // stop transmitting
  
  Serial.println("Done");
  
void loop()
{

}

Or like this

#include <Wire.h>


//I2C address definitions
#define I2C_ADDR_ALO 0x49 //I2C address definitions

void setup()
{

  int MSB=0, LSB=0; //MSB, LSB variables for reading back registers

  Serial.begin(9600);
  Serial.print("Programming...");
  Wire.begin(); // join i2c bus (address optional for master)

  //Power-up the device and channels
  //WRITE DEVICE_CONFIG(0x01), 0x0000
  Wire.beginTransmission(I2C_ADDR_ALO); 
  Wire.write(byte(0x01)); // DEVICE_CONFIG Register
  Wire.write(byte(0x00)); // 
  Wire.write(byte(0x00)); //
  Wire.endTransmission(); // stop transmitting

  //Program 2.625V on channel A
  //WRITE DACA_DATA(0x08), 0x0868 //10-bit MSB aligned
  Wire.beginTransmission(I2C_ADDR_ALO);
  Wire.write(byte(0x03)); // DACA_DATA Register
  Wire.write(byte(0x08)); //
  Wire.write(byte(0x68)); // 
  Wire.endTransmission(); // stop transmitting
  
  Serial.println("Done");
  
void loop()
{

}

0 Akhilesh K over 2 years ago in reply to Akhilesh K

TI__Mastermind 18546 points

Hi,

I am assuming both pins have 0.1uF each.

try this first.

#include <Wire.h>


//I2C address definitions
#define I2C_ADDR_ALO 0x49 //I2C address definitions

void setup()
{

  int MSB=0, LSB=0; //MSB, LSB variables for reading back registers

  Serial.begin(9600);
  Serial.print("Programming...");
  Wire.begin(); // join i2c bus (address optional for master)

  //Power-up the device and channels
  //WRITE DEVICE_CONFIG(0x01), 0x0000
  Wire.beginTransmission(I2C_ADDR_ALO); 
  Wire.write(byte(0x01)); // DEVICE_CONFIG Register
  Wire.write(byte(0x00)); // 
  Wire.write(byte(0x00)); //
  Wire.endTransmission(); // stop transmitting

  //Program 2.625V on channel A
  //WRITE DACA_DATA(0x08), 0x0868 //10-bit MSB aligned
  Wire.beginTransmission(I2C_ADDR_ALO);
  Wire.write(byte(0x08)); // DACA_DATA Register
  Wire.write(byte(0x08)); //
  Wire.write(byte(0x68)); // 
  Wire.endTransmission(); // stop transmitting
  
  Serial.println("Done");
  
void loop()
{

}

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

I really thank you for your help but unfortunately it does not work.
I will try with Raspberry Pi 3 to see what happen.

Best Regards
Salam

0 Akhilesh K over 2 years ago in reply to Salam Alabassi

TI__Mastermind 18546 points

Hi,

Ok.

Let me know the status.

Regards,

0 Salam Alabassi over 2 years ago in reply to Akhilesh K

Prodigy 10 points

Hi.

Firstly, I connected the DAC with the Arduino and raspberry pi. and send the commands and got the same thing.

All output channels give 16 mV without enabling commands of the channels.

When I send the enable command to enable channel A, the voltage drops to 2.8 mV and others are still 16 mV.
And so on with enabling others channels but others channels drop to 0.2mV.

When I turn off the DAC, everything comes back to the original states.

I tried to read the register, there was no data always, received 0x0000.
That means, in my opinion, the enable command works perfectly but the register doesn't receive any data from our code.

Best Regards.