AD7190 pdf datasheet (内置可编程增益放大器)

The AD7190 is a low noise, complete analog front end for high

precision measurement applicaTIons. It contains a low noise, 24-

bit Σ-Δ ADC. The on-chip low noise gain stage means that

signals of small amplitude can be interfaced directly to the

ADC.

The device can be configured to have two differenTIal inputs or

four pseudo-differenTIal inputs. The device can be operated

with either the internal clock or an external clock. The output

data rate from the part can be varied from 4.7 Hz to 4.8 kHz.

The device can be operated with a sinc3 or a sinc4 digital filter.

At the lower update rates, the sinc3 is useful to opTImize the

settling time. The benefit of the sinc4 at low update rates is the

superior 50 Hz/60 Hz rejection. At the higher update rates, the

sinc4 filter gives best noise performance. For applications that

require all conversions to be settled, the AD7190 includes a

zero-latency feature.

The part operates with a power supply from 3 V to 5.25 V. It

consumes a current of 6 mA. It is housed in a 24-lead TSSOP

package.