如何从24位AD转换器获得23位有效分辨率

The ADS1210 and ADS1211 are precision, wide dynamic
range, DS A/D converters that have 24 bits of no missing
code and up to 23 bits rms of effective resolution. Because
of the nature of the DS design architecture the circuit
designer has control over more of the variables and interface
options in the A/D’s conversion process than is realizable
with other converter architectures. These options are digitally
implemented and include analog input configuration,
oversampling, calibration and digital protocol control. Consequently,
these A/D converters can service a wide variety of
applications, including high precision, high speed, and low
power.
There is the subset of conditions that must exist before
23 bits rms of resolution can be achieved with the
ADS1210/11. The manipulation of these A/D functions as
well as practical layout recommendations are discussed in
this application note.