What is the difference b/w AD8306ARZ & AD8309ARUZ Log amplifiers

Hi,

We are currently using the Log amplifier AD8309ARUZ for our Log and limiter output requirement at 30MHz frequency. We have seen that, the part

AD8306ARZ also has the same specs except the package compared to AD8309.

1) May I know, What is the actual difference inside these two chips? Which one is has the better performance?

2) We have seen both the parts are in production? Which part is recommended for the new designs?

3) By comparing the cost The AD8309 is only $9.87 whereas AD8306ARZ is $18.72. Its around the double the cost of AD8309 but there is no functional and specs difference except package?

Our dynamic range is -70dBm to +5dBm input level at 30MHz pulsed input signal. Kindly give us the clarifications and suggest the Pros and cons to use the best part in our product.

Regards,

Sugumar K

Parents
  • 0
    •  Analog Employees 
    on Nov 6, 2013 8:58 PM

    Hi Sugumar,

    There are some slight differences between the AD8306 and the AD8309.  One of which is the frequency response of the limiter output: 585 MHz for the AD8306 vs.  875 MHz for the AD8309.  Note we test to 500 MHz for the AD8309 and only to 400 MHz for the AD8306.  So there is some slight design differences between the two parts.

    I believe the cost difference is partly due to the wider temperature range of the AD8306, -55 C to +125 C, while in the ceramic package.

    Unless the extended temperature range is needed, I would recommend using the AD8309.

    Hope this helps,

    Joel

Reply
  • 0
    •  Analog Employees 
    on Nov 6, 2013 8:58 PM

    Hi Sugumar,

    There are some slight differences between the AD8306 and the AD8309.  One of which is the frequency response of the limiter output: 585 MHz for the AD8306 vs.  875 MHz for the AD8309.  Note we test to 500 MHz for the AD8309 and only to 400 MHz for the AD8306.  So there is some slight design differences between the two parts.

    I believe the cost difference is partly due to the wider temperature range of the AD8306, -55 C to +125 C, while in the ceramic package.

    Unless the extended temperature range is needed, I would recommend using the AD8309.

    Hope this helps,

    Joel

Children
No Data