Delta-sigma Modulator and Isolated Amplifier for Use in Renewable Energy Applications
Texas Instruments has declared the introduction of a delta-sigma modulator and an isolated amplifier that allow precise shunt-based electric current measurement in renewable energy applications and motor control.
The AMC1204 delta-sigma modulator and AMC1200 isolated amplifier enables the designers to augment the immunity to magnetic fields, temperature stability and accuracy in equipment such as uninterrupted power supplies, solar inverters and AC drives.
The AMC1204 is an externally clocked, 20-MHz isolated delta-sigma modulator that offers 40% improved linearity of +/- 8 LSB than the other competitive products. The digital output enables the designers to identify and name the required features of a digital filter on the basis of the system requirements. The external clock interface facilitates concurrent measurement of multiple numbers of channels.
The AMC1200 is a 4 kV maximum isolated amplifier that offers 80% improved linearity and gain drift when equated with devices of the same type and consumes 50% less power. The product offers high precision with a top level non=linearity of 0.07% and a gain drift of 56 ppm/C. The low high-side supplies within 8 mA at 5 V level to cut down power usage. The product can be used in power ranges from -40°C to 105°C and -20°C more than the competitors. Feasibility for quick and easy connectivity to microcontrollers (MCU) and analog-to-digital converters (ADC) utilizing 3.3 V or 5 V operational functions on the low side and auto-adjusting normal mode voltage.
Both the instruments offer protection against high electromagnetic interference and a sturdy isolation barrier that received IEC 60747-5-2 and UL 1577 certifications. The AMC1204 has also received CSA certification.
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