(motor whirring)
- Hello and welcome to Another Geek Moment.
Today we're gonna be talking about Linear Technology's
LTC2984, which adds on to the existing LTC2983.
The LTC2984 is a high-accuracy
digital temperature measurement system,
that can be used for any application
where temperature needs to be measured,
and accuracy is of extreme importance.
One example where the LTC2984 shines,
is in noisy industrial environments
like the one we simulated behind us.
Now, the LTC2984 owes its accuracy
to three 24-bit ADCs and a 15 ppm reference
for multiple sensor measurements simultaneously.
Now let's talk about the EEPROM feature.
The EEPROM enables us to on chip storage
of channel configuration data
and custom system coefficients.
It also facilitates the use of self-contained
sensing boards and modules.
In addition to that, it comes with a GUI software
that allows you to hookup and go.
Once you're in the GUI, you're just a single click away
from using the EEPROM.
Let's see what you get when you order the
DC2420A kit.
First you will see the data sheet and manual
for the kit.
Linear Technology gives you links in the manual
to download the software.
They made it very easy.
Then you will see a USB cable and a 14-pin ribbon cable
that you'll use to connect the boards.
Then you'll see the DC2399A,
which is the main demo circuit
with the Linear Technology's LTC2984.
Then you'll have the DC2210A,
which is the demo board or the breakout board.
And then you'll have the DC2026,
which is the Linduino One.
The Linduino is Linear Technology's
Arduino-compatible system used for developing
and distributing firmware libraries
and example code for Linear Technology ICs.
Now the Linduino comes with a 14-pin quick eval connector
that can be plugged in to nearly 100 different
daughter cards from Linear Technology,
and it also generates C code,
which is designed to be used
on other micro-controller platforms.
Now let's see how they all connect.
First we'll take the DC2210A,
and connect it to the LTC2984.
And then we'll take the LTC2984,
and hook it to the Linduino One
with the 14-pin ribbon cable.
And then lastly you'd take the USB cable
hook it to the Linduino One.
Now that we've unboxed everything,
let's hook up the demo.
Now I already have the GUI software pulled up,
so all we need to do
is hook into our laptop via the USB cable.
And earlier I already loaded a circuit into the EEPROM,
and now I'll show you how simple it is
to get it back.
Just go to Configuration, EEPROM,
Retrieve from EEPROM.
And just like that,
you got your circuit.
Now you can do a configuration check,
make sure that there's no errors, and then you can run it.
Now that it's running you can see
we're getting 100 degrees C
from the RTD that we're sourcing from the fluke meter.
Goes through a 1000 feet of unshielded telephone wire
that we have Christmas lights in, motors,
fluorescent lights, some more LEDs.
And it goes into the DC2210A,
and all that's going to be filtering all this noise
is a simple RC filter network right here,
and the digital filtering of the LTC2984.
Now let's inject some noise into it.
First you're going to get 60 hertz
from the Christmas lights.
Then you'll get wide band noise
from the fluorescent lights and the motor.
(motor whirring)
Alright now that we have all this noise
going into it,
you can see the output on the GUI,
we're right at a 100, 121.
So we're still well within our tolerance.
For further information or any other questions,
please go to digi-key.com,
and search the DC2420A kit,
and thank you for watching Another Geek Moment.
(rock music)