573-935-202C power supply application selection has sufficient safety creepage distance, high isolation voltage characteristics and very low isolation capacitance value, so that the safety performance of the system to get a better guarantee, here we recommend the use of JinShengYang company 6000VDC isolation G series (fixed voltage input, isolation 6000VDC positive and negative voltage output) or H series products (fixed voltage input, isolation) 6000VDC single voltage output), this series of products because of its high isolation voltage characteristics (6000VDC) and its very low isolation capacitance value (≤ 10pF) is widely used in the medical electronic equipment industry.

The 573-935-202C is a practical circuit in the ECG detection circuit. The positive and negative inputs of the amplifier are connected to the left arm (LA) and the right arm (RA) of the human body through the electrocardiographic sensor, and the drive network composed of op-amp N and resistor R1~R4 is connected to the right leg (RL) of the human body, constituting a “floating ground”. As the biological signal is very weak, coupled with polarisation potential, so the amplification of the level should not be too high, generally taken between 10 ~ 100, and can only be used as a pre-amplifier, in order to detect the safety of the latter stage should generally be used to isolate the amplifier circuit to isolate the level of the power supply voltage should be used to isolate the power supply module should be used to provide the best to achieve the power supply and the signal of the complete isolation.

573-935-202C has high input impedance, low leakage current, high detection accuracy and human safety and other indicators can fully meet the requirements of medical equipment standards. The circuit is generally used as a pre-amplifier circuit, the device is in direct contact with the human body, and pick up the ECG signal through the INA115 for amplification, and finally isolated by ISO122 transmission to the rear amplifier circuit, to achieve the human body signal and the output and power supply isolation and amplification.