IS0100 functional schematic diagram

 Isoloo series signal isolation amplifiers mainly include IS0100/102/106/120/122/150 models. '
    IS0100 is a current mode isolation amplifier with a gain of 1. The functional schematic diagram is shown in Figure 10-18. The signal is input from pins ⑩ and ⑩
, and is amplified by Al to drive the light-emitting diode LED to emit light. The intensity of the LED light is mainly determined by the intensity of the input signal (the
input signal is a voltage source or a current source). At the same time, in order to avoid signal Overload and distortion,
the reference current source IREFI and automatic gain control (AGC) are also set up to detect the photosensitive tube VD, so as to
control within a certain range; when the LED light emission increases, the conduction of VDj also increases , which weakens the input signal and the amplitude of the output signal
to achieve the purpose of automatic gain control.
    Amplifiers A1 and A2 are independent of each other and have no electrical connection. The signal between them is emitted in the form of light by LED
, received by VD2, and output by A2 after amplification. Output VOL_T=12 RF =lir,r RF (determined by the internal design of the circuit).