2-V input reinforced isolated-power amplifier with ratiometric single-ended output

The AMC4311R is a precision, galvanically isolated amplifier with

a fully integrated, isolated DC/DC converter that allows single-supply operation from the

low-side of the device. The DC/DC converter is capable of sourcing an external current of

up to 8mA to power additional device (example: AMC0300D, AMC23C12) on the high side. The high-impedance

input is optimized for connection to a high-impedance resistive divider or other voltage

signal source with high output resistance.

The isolation

barrier separates parts of the system that operate on different common-mode voltage

levels. The isolation barrier is highly resistant to magnetic interference. This barrier

is certified to provide reinforced isolation up to 5kVRMS.

The AMC4311R outputs a single-ended signal proportional to the input

voltage. The full-scale output is set by the voltage applied to the REFIN pin. The

output of the AMC4311R is designed to connect

directly to the input of an ADC. Connect REFIN to the same reference voltage as the

ADC to match the dynamic input voltage range of the ADC.

The AMC4311R device

comes in 20-pin, wide-body SOIC package, and is fully specified over the temperature range

from –40°C to +125°C.