DAC70501: How to send a command via SPI mode

Shiga Yuichi

Part Number: DAC70501

I'd like to know how to send a command via SPI mode.

For example, what command should I send via SPI mode if I want to make the following settings?

0 Anbu Mani over 3 years ago

Hi,

Please send the following SPI command

2 0001; // Enable DAC_SYNC_EN if DAC update using LDAC trigger (by default DAC_SYNC_EN =0, async mode)

3 0100 ;// disable internal reference

4 0001 ; // select reference divider and gain based on your requirement

8 8000 ; // Write midscale code

5 0010 ; // Send this command if you are using LDAC trigger for update DAC.

0 Shiga Yuichi over 3 years ago in reply to Anbu Mani

Hello,

Thank you for the information.

Judging from the command that taught me,

Should I follow the table below?

0 Anbu Mani over 3 years ago in reply to Shiga Yuichi

Yes.

0 Shiga Yuichi over 3 years ago in reply to Anbu Mani

OK,Thanks.

According to the instruction on pages 23 -24 (8.5.1.1 SPI Mode),

The input shift register is 24 bits wide when I use SPI Mode.

What should I send on the fist 4bit before 20bit that you taught me(B19~B0)?

0000 ? or XXXX ?

+1 Anbu Mani over 3 years ago in reply to Shiga Yuichi

hi ,

you have to send 24 bit frame for each register write. please add '0000' at front.

020001; // Enable DAC_SYNC_EN if DAC update using LDAC trigger (by default DAC_SYNC_EN =0, async mode)

030100 ;// disable internal reference

040001 ; // select reference divider and gain based on your requirement

088000 ; // Write midscale code

050010 ; // Send this command if you are using LDAC trigger for update DAC.

0 Shiga Yuichi over 3 years ago in reply to Anbu Mani

Thank you for your polite answer. My doubts have been resolved. We will proceed with the circuit design with reference to the information provided.

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