Reinforced isolated amplifier for current sensing

The Texas Instruments AMC1300 is a precision, isolated amplifier having an output separated from the input circuitry by an isolation barrier highly resistant to magnetic interference. This barrier is certified to offer reinforced galvanic isolation of up to 5kVRMS according to VDE V 0884-11 and UL1577. When used together with isolated power supplies, this isolated amplifier divides parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage. The input of the device is optimised for direct connection to shunt resistors or other low voltage-level signal sources. The high performance of the device supports accurate current control resulting in system-level power savings and, especially in motor control applications, lower torque ripple. The integrated common-mode overvoltage and missing high-side supply voltage detection points of the device simplify system-level design and diagnostics. The device is provided with two performance grade options: the AMC1300B is specified over the extended industrial temperature range of –55C to +125C, and the AMC1300 for operation at –40C to +125C.