REF3330: Vin Rise time

KJ LEE

Prodigy 10 points

Part Number: REF3330

Tool/software:

Is there a restriction on the rise time of the input power?

Most operate normally regardless of VIN rise time, but Only one has an VOUT No Output, HIZ phenomenon.

The datasheet does not show anything regarding the VIN rise time.

Should I regard it as a chip defect?

OSC CH2: VIN, CH3:VOUT

1.VIN = 3V, Rise time : 100msec -> VOUT No Output, HIZ

2. VIN = 3V, Rise time : 10msec -> Good work

2 days ago

0 Jackson Wightman 2 days ago

TI__Expert 8600 points

Hello,

If you are using REF3330 which has a 3.0V output, 3.0V input is too low. It also seems that the green trace in these figures is showing an input voltage of 2.5V, not 3.0V.

Can you please run this experiment again where the input voltage is at least VOUT + VDO? For REF3330, I would recommend an input voltage of at least 3.2V.

Thanks,

Jackson