AD604 vs AD605

Document created by analog-archivist Employee on Feb 23, 2016
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The main difference between AD 604 and AD 605 is a preamplifier at the input
for the first one. This amplifier has very low noise : 0.7 nV/square(Hz). I
would like to find such a good amplifier. Which reference is it?

 

The low noise preamp in the AD604 has not been released as a stand alone
product. The lowest noise amplifier available from analog devices is the AD797
with wide band voltage noise density of 900pV/sqrt(Hz). This is used
extensively in audio applications. For wider bandwidth applications such as
sonar or ultrasound, the AD8004 has 250MHZ bandwidth and 1.5nV/sqrt(Hz).

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