TIDA-00130, Zero drift PGA based Analog Front End Design for Circuit Breakers (ACB/MCCB-ETU)

TIDA-00130, Zero drift PGA based Analog Front End Design for Circuit Breakers (ACB/MCCB-ETU). This reference design is intended for use in molded case circuit breakers (MCCB) electronic trip units. The programmable gain amplifier based design acts as the current monitoring for over-current earth fault relays. Utilizing a zero drift programmable amplifier, this design provides a 10 % pick-up (A) accuracy and time delay (s) accuracy of 0 to -20%. Additionally, this solution was designed to handle harsh environment conditions by including features such as ambient insensitivity from -10 to 70 C and high electromagnetic immunity