Post Go back to editing

LTC2000 vs LTC2000A compatibility

Category: Hardware
Product Number: LTC2000A

Hello,

We've been using the LTC2000 and are looking at replacing the part in our design with the LTC2000A.

When I look at the datasheet, the only difference that concerns me is that the LTC2000A calls out a slightly higher voltage for VDD18.

In the  LTC2000 the voltage is rated from 1.71V to 1.89V
In the LTC2000A the voltage is rated from 1.8V to 1.92V.

Would there be any problems in running the LTC2000A between 1.71V and 1.8V if I keep the sample rate below 2Gsps?

My suspicion is that these are actually the same parts and the 'A' version is simply screened for better performance. If that is the case, then I think I should be able to run the part at the LTC2000 voltages and achieve the LTC2000 specs.

Thanks.

Mark

Parents
  • FormerMember
    0 FormerMember

Hi Mark,

I agree that both parts have very similar specs but are characterized by different voltage supplies.

To run LTC2000A with lower supplies at a lower sampling rate, it will be using the part outside of the tested performance with lower noise performance.

I will collect more data from the design team and get back to you.

thanks

Adam

Reply
  • FormerMember
    0 FormerMember

Hi Mark,

I agree that both parts have very similar specs but are characterized by different voltage supplies.

To run LTC2000A with lower supplies at a lower sampling rate, it will be using the part outside of the tested performance with lower noise performance.

I will collect more data from the design team and get back to you.

thanks

Adam

Children in reply to Mark_Escape

Hi Mark,

According to the datasheet/page 7, the min Vdd18 is 1.8V

The design team doesn't have data at Vdd18 lower than 1.8V and recommended it to follow the datasheet strictly.

Thanks

Adam