The EVAL-CN0185-EB1Z is the evaluation board described in the circuit from the lab CN-0185, entitled "A novel analog to analog isolator using an isolated sigma-delta modulator, isolated dc to dc converter and active filter (CN0185)". The circuit is based on the AD7400A, a second order, sigma delta modulator with a Digitally isolated 1bit data stream output. The isolated analog signal is recovered with a fourth order active filter based on the dual, low noise, rail to rail AD8646 OPAMP. With the ADuM5000 as the power supply for the isolated side, the two sides are completely isolated and use only one power supply for the system. The circuit has 0.05% linearity and benefits from the noise shaping provided by the modulator of the AD7400A and the analog filter. The circuit's applications include motor control and shunt current monitoring and it is a good alternative to isolation systems based on opto-isolators.
- Differential input noise reduction filter
- Isolated Sigma to Delta Modulator
- Isolated DC to DC Converter
电机驱动与控制, 传感与仪器, 测试与测量