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ADATE305 OVD does not go High

Question asked by katsu on Jul 6, 2017
Latest reply on Jul 17, 2017 by katsu

Hello,

 

OVD does not go High. Please provide any advice.

 

Problem:
 #68 pin: OVD_CH0 and #8 pin: OVD_CH1 does not go High.

 

Question:
 1) Is OVD_CH0 and OVD_CH1 open drain? (Pull-up is applied in our PCB.)

 

 2) Following register setting correct? (It is expected that OVD_CH0 and OVD_CH1 goes High by following register setting.)
   ADDRESS    DATA       description
   0x01              0x2332     Set DVH to +3.0V.
   0x0A              0x1FFF    Set OVD high level to +2.5V.
   0x12               0x001      Enable OVD alarm flag.

 

 3) Please advise if there are other points to consider.

 

Additional information:
 Reading ADDRESS 0x13 by changing input signal state:
    1 = DUT voltage > OVD high voltage
    0 = DUT voltage < OVD high voltage
 Above states are observed, however OVD_CH0 and OVD_CH1 output is Low level in both cases.

 

Best Regards,

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