Re: Probably a really stupid question...

On Fri, 28 Mar 2008 22:03:35 -0500, "Dave" <db5151@xxxxxxxxxxx> wrote:


"whit3rd" <whit3rd@xxxxxxxxx> wrote in message
news:692481b6-b6d1-4067-a948-abbf58876f08@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Mar 28, 3:07 pm, Mike Silva <snarflem...@xxxxxxxxx> wrote:
... using the NTE2051/UTC7106

Those chips can read an analog voltage and drive a 3-1/2 digit
display, but AFAICT they can't do the double channel read (Vin and
Vout) and they can't do the gain math (Vout/Vin).

Sure, they read two channels; they read an input and a reference.
Then they display the ratio of those two channels, as a digital
number.

You'll want to rectify and amplify the small input signal to make full
use of the display range, before presenting it as a voltage reference.
The 'it's a digital voltmeter' description is just one of the
multiple uses this kind of chip can be put to...

==
Huh. So tell me, where can I find more information on these chips?
Something that explains the data***, so that I can ultimately buy one,
hook it up and make use of it. Seriously, the pin connection diagram in the
NTE2051 data*** doesn't really tell me much. What are the OSC 1/2/3 pins
(pins 40/39/38 respectively) for? Why is there a "ref high" and a "ref low"
as well as an "in high" and an "in low" (pins 36/35 and pins 31/30)? etc,
etc.

---
The 7106 was originally Intersil, and here's the current data ***.

http://www.intersil.com/data/fn/fn3082.pdf

JF
.

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