Instrumentation Amplifier has one output pin; ADC has two!

[randomshinichi]

Hello people, I'm new to electronics as you can see. I'm trying to make a PCB in Eagle, hooking a instrumentation amplifier up to a sigma delta ADC. The problem is, the ADC (MAX11040GUU+) has AIN0- and AIN0+, but I've only got one output pin from the instrumentation amplifier (a MAX4208). What to do? I expect the voltage on that pin to be bipolar too.

I'm also unsure about where to get the Output Reference Level, i.e., the voltage the amplifier should output when the voltage difference between the inputs is 0. Logically, it should be 0V, i.e. I should ground the pin.

And as for the feedback pin:

6 FB Feedback Input. Connect FB to the center tap of an external resistive divider from OUT to REF to
set the gain for the MAX4208. MAX4209 FB is internally connected to gain-setting resistors. Connect
an optional capacitor, CFB, from OUT to FB to reduce autozero noise.

So... it looks like this, right? Why couldn't they just say "noninverting amplifier"? But I must have interpreted something wrong because it looks very different from the Typical Application Circuit.



EDIT: The REFIN/MODE pin is also a mystery. According to the datasheet:

Reference/Shutdown Mode Input. Trimode function is as follows:
Connect to VDD to put the device in shutdown mode.
Connect to an external reference (between VSS + 0.2V and VDD - 1.3V) to buffer the voltage at
REFIN/MODE. Using the REF buffer allows the use of a simple resistor-divider or high-impedance
external reference to set the OUT level at 0mV IN with minimum error.
Connect to VSS to force the internal buffer output into a high-impedance state to allow external direct
drive of REF.

So apparently, if I ground the pin, it will allow external control of REF. I don't want that, because I want the voltage output to be 0 all the time if the difference between the inputs is 0. It looks like I need it to be connected to an "external reference"... but my input signal is a sine in the mV/nV range, so the external reference would have to be ground anyway, wouldn't it?

 

[randomshinichi]

Bump. Was my question too basic?