Recently introduced by Texas Instruments is an isolated amplifier and a delta-sigma modulator that enable precise shunt-based current measurement in motor control and green energy applications.
The AMC1200 isolated amplifier and AMC1204 delta-sigma modulator allow designers to increase accuracy, temperature stability and immunity to magnetic fields in equipment such as AC drives, solar inverters and uninterruptible power supplies.
The AMC1200 is a 4 kV peak isolated amplifier providing non-linearity of 0,07% and gain drift of 56 ppm/°C. High-side supply current is no more than 8 mA at 5 V. The device provides easy connection to analog-to-digital converters and microcontrollers with 5 V or 3,3 V operation on the low side and self-adjusting common mode voltage. It is fully specified over the extended industrial temperature range of -40°C to 105°C.
The AMC1204 is a 20 MHz, externally clocked, isolated delta-sigma modulator with non-linearity of ±8 LSB (maximum) and a digital output that allows designers to define digital filter characteristics based on system requirements. It includes an external clock interface to enable simultaneous measurement of multiple channels.
Both devices provide high electromagnetic interference immunity and a robust isolation barrier certified by UL 1577 and IEC 60747-5-2. The AMC1204 is also CSA certified.
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