Automotive high-impedance, basic isolated amplifier for voltage sensing

The Texas Instruments AMC1211A-Q1 is a precision, isolated amplifier with an output segregated from the input circuitry by an isolation barrier that is extremely resistant to magnetic interference. This barrier is certified to give basic galvanic isolation of up to 4.25kVPEAK according to VDE V 0884-11 and UL1577. Used together with isolated power supplies, this amplifier divides parts of the system that run on different common-mode voltage levels and guards lower-voltage parts from damage. The high-impedance input of the device is optimised for connection to high-voltage resistive dividers or other voltage signal sources with high output resistance. The great performance of the device promotes accurate, low-temperature drift voltage or temperature sensing and control in closed-loop systems. The integrated missing high-side supply voltage detection feature simplifies system-level design and diagnostics.