FAQ

Q 

I would like to use sigma-delta converters for a
multi-channel (48) acquisition application. There
is a stringent need for synchronicity between
each converter in our application.

I am interested in using AD7712 converters since
it features…

Q 

If he wants to input +/-10V single-ended signal to AIN2. What power supply
should he use? Single 5V, single 10V or +/-5V? I can not find very clear
statement in the datasheet.

A 

For an analog input of +/-10V on the channel, a supply of +/-5V can…

Q 

In AD7712 data sheet, pages 11 and 12, noise is specified as total rms value. I
would like to know noise spectral density ( in particular for a 1kHz notch
frequency selection and in a 1 mHz to 1 Hz bandwidth ). Have you got some
specifications or…

Q 

Can you tell me the variation in input resistance (Rint) and variation
in input capacitance (Cint) over tempearture?

A 

Rint and Cint were not characterized over temperature for AD7712 so I regret
that we have no data
to provide with regards to…

Q 

In our application, some AD7712 use System Offset Calibration initiated, after
the power-up, together with the device configuration, by the means of a single
writing of the Configuration Register (0x8297A1). In our case, the calibration
duration…