From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2002-02-01 00:13:31
--- In buildcheapeeg_at_yahoogroups.com, "Andres Calderon" <andresfc_at_ideam.gov.co> wrote:
> Hi,
> What is the better choice INA101, AD620 (or AD627), LT1167, other?
Hi Andres,
please define "better". :-)
There are several parameters that you might be interested in, so
choosing the right one boils down to a lot of tradeoffs.
For instance, low power devices are usually noisier than standard
power devices.
Amplifiers with FET-inputs have much higher impedance but lower
common mode rejection than bipolar models (don't know if that holds
everytime, just something I have noticed.)
In terms of noise... AD627 seems to have less low frequency (flicker)
current noise, but more high frequency (shot) noise than LT1167 for
instance.
On the other hand the power supply noise rejection (at 100Hz for
instance), is only 70dB for the AD627, but well over 100dB for the
LT1167.
You can compare the same characteristic for several devices, but you
can't easily rank the devices, unless one is better overall.
So, if you're just going to play around a bit, with the brainmaster
input stage for instance... you can probably pick any one. :-)
Regards,
Andreas
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:37 BST