ISL28417FBBZ-T7

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ISL28417FBBZ-T7 is a bidirectional level shifter designed for automated test applications such as parallel communication interface, voltage-controlled instrumentation or temperature sensors. It provides excellent performance in levels shifting with low power consumption. ISL28417FBBZ-T7 amplifies signal swings from 0.0V to 8.4V levels by converting one signal to the other signal level.

This chip belongs to the category of linear signal amplifiers- instrumentation, OP amps, buffer amps. Linear signal amplifiers are required to amplify an input signal while maintaining its waveform throughout the whole amplification process. The ISL28417FBBZ-T7 is a linear amplifier since the output is the same as the input signal, but it amplifies the signal to a higher voltage.

The ISL28417FBBZ-T7 can compensate most of the common mode voltage losses associated with digital logic interfacing and provides low offset voltage and low power consumption making it ideal for applications including USB, UART and SPI communications. It takes two digital input signals and outputs two bipolar amplified signals in the range of 0.0V to 8.4V.

The core working principle of the ISL28417FBBZ-T7 is to sense the input signals and adjust the output stages to match the input level. The device supports 2-pole differential signal paths and one non-differential signal path. The differential paths provide adjustable gain and offset, while the non-differential path provides adjustable offset only. Input signals are converted to non-differential output signals by corresponding non-differencial buffer amplifiers.

The differential path of the device is derived from the mirroring of the two complementary gate pairs, and provides matched input-to-output performance over a wide frequency range. The adjustable gain and offset of the differential path makes the device useful in many applications, such as digital-to-analog conversion, CANbus and digital control.

The ISL28417FBBZ-T7 uses complementary transconductance amplifiers, which are the basis for the non-differencial buffer amplifiers. The core gain of the buffer amplifiers is determined by the ratio of the matched SiFET transistor pairs and the matched resistor networks. The output voltage of the buffer amplifier is determined by the output voltage of the mirroring differential pair and the offset voltage of the transconductance amplifier.

The bidirectional level shifter takes two digital input signals and converts them to two amplified bipolar signals in the range of 0.0V to 8.4V. The level shifter operates in two modes: the pass-through mode and the amplification mode. In the pass-through mode, the input logic signals are passed directly to the output, while in the amplification mode, the input logic signals are amplified by the adjustable gain and offset of the device. ISL28417FBBZ-T7 is designed for applications such as parallel communication, voltage-controlled instrumentation and temperature sensors which require low power consumption, low offset voltage and high performance.

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