TLV5604: TLV5604IPW

fuyuan zhang

Prodigy 10 points

Part Number: TLV5604

TLV5604 output not 0 after power on,why?

If we want it 0 after power on . How to do?

over 4 years ago

0 Akhilesh K over 4 years ago

TI__Mastermind 19086 points

Hi,

what do you mean by not zero? What is the voltage you are observing after power up? Offset error of the DAC is close to 12mV, is this the voltage you are observing after power up? if yes, this is normal for TLV5604

Also please share your schematics

Regards,

0 fuyuan zhang over 4 years ago

Prodigy 10 points

DA output voltage after power on (0 to 2.5V random)

0 fuyuan zhang over 4 years ago in reply to Akhilesh K

Prodigy 10 points

0 Akhilesh K over 4 years ago in reply to fuyuan zhang

TI__Mastermind 19086 points

Hi,

Schematics looks fine to me.

what is your power up sequence?

The correct power sequence should be DVDD, AVDD and then REF. Please look at the absolute max ratings.

You can refer to the following training video for details of power sequencing in precision DACs:

training.ti.com/lessons-precision-dacs-power-sequencing

Regards,

0 fuyuan zhang over 4 years ago in reply to fuyuan zhang

Prodigy 10 points

If the pin2(PD) is low,what is the output?

0 Akhilesh K over 4 years ago in reply to fuyuan zhang

TI__Mastermind 19086 points

Hi,

/PD is an active low input which will power down all DAC outputs. DAC outputs will be zero in this case.

Regards,

0 fuyuan zhang over 4 years ago in reply to fuyuan zhang

Prodigy 10 points

So if Pin2(PD) is always high,Pin4,pin5,pin6,pin7,pin3 no input,what is the DA output? It is random value or nearby 0?

0 Akhilesh K over 4 years ago in reply to fuyuan zhang

TI__Mastermind 19086 points

Hi,

If /PD is high and you dont have any digital signals on pins 3, 4, 5, 6, 7 I expect outputs to be at zero level. I didn't test these conditions

I assume all digital logic signals are at either high or low. Never float CMOS digital inputs

Regards,

Data converters

Data converters forum

TLV5604: TLV5604IPW