ISL83084EIBZ

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ISL83084EIBZ is a voltage-controlled monolithic differential amplifier designed for signal-switching applications in high-speed data communications and AE sources using the isolation barrier for signal isolation and transmission between DC and AC power supplies. This integrated circuit provides a single pair of on-chip differential-amplifier signal paths and a pair of signal inputs with a typical gain of 5.2V/V, including a 50kOhm common-mode resistor between the signal inputs and outputs. It offers a wide range of voltage-controlled output voltages of 2.5 to 12 volts with a 2.5V to 5V input range.

ISL83084EIBZ can be used in applications such as memory buffer, dual differential load switch, power management logic control, low voltage differential signal switching, etc. Its low input voltage range, low output voltage range, and low noise allow it to work in high-speed data communications such as RS-232, IEEE 1394, USB, SATA/SAS, and Ethernet. It also provides an isolation barrier between the signal input and the signal output to meet the requirements of industrial Ethernet and other safety applications.

ISL83084EIBZ consists of three main components: the differential amplifier, the common-mode feedback resistor and the isolation barrier. The amplifier is a differential device consisting of two transistors, two resistors and two capacitors connected in series. The two transistors are connected in an emitter-follower configuration and form the differential amplifier, which amplifies the differential signal between the input and the output. The resistors divide the amplitude of the differential signal and provide the necessary impedance for the differential gain of the amplifier. The capacitors provide the AC impedance for the differential operation of the amplifier, ensure the accuracy of the gain, and prevent any distortion in the signal.

The common-mode feedback resistor is used in conjunction with the differential amplifier to create a common-mode feedback loop. This provides a feedback voltage to the amplifier in order to compensate for the offset of the common-mode signal. This feedback voltage is then fed back to the inputs of the differential amplifier and is used to adjust the gain of the amplifier to the desired level.

The isolator is the last component of the system and is required to provide isolation between the DC power supplies and the signals. It consists of two resistors connected in series, with the first being connected to the input of the amplifier and the second being connected to the ground. The two resistors are connected to a common input line and a common ground line. The isolator acts as an electrical buffer and reduces any noise or interference from one power supply to the other.

In summary, ISL83084EIBZ is an integrated circuit designed for high-speed data communications applications. It consists of a differential amplifier, a common-mode feedback resistor, and an isolator for isolation. Its low input voltage range, low output voltage range, and low noise make it ideal for high-speed data communications, industrial Ethernet applications and other safety applications.

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