ISL28190FRUZ-T7 Integrated Circuits (ICs)

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Introduction

ISL28190FRUZ-T7 is a high performance monolithic amplifier (or op amp) designed for use in a wide variety of linear, instrumentation, and buffer amplifier applications. It is a single-stage, low offset, low drift, low input bias current amplifier with an input common-mode voltage range that extends to the negative rail. The device is operational up to a supply voltage of +28V and is specified over the commercial temperature range of -40°C to +85°C and the extended temperature range of -40°C to +125°C.

Application Field

The ISL28190FRUZ-T7 is suitable for use in industrial and instrumentation systems, process control, medical and avionics systems, and automotive electronics. Possible applications include differential amplifiers, instrumentation amplifiers, sample-and-hold amplifiers, transimpedance amplifiers, active filters, integrators, thermocouple amplifiers, bridge amplifiers, analog-to-digital converters, transducers, and sensors.

Instrumentation amplifiers are used for amplifying the small signals from transducers and sensors. For industrial applications, instrument amplifiers are used in process control systems to sense, measure, and control process parameters. In medical systems, instrument amplifiers are used to measure ECG, EEG, and derived values of the body\'s physiological processes. And they are also used in avionics applications to measure functions such as the angle of attack, angle of roll, etc. in the aero-system.

Bridge amplifiers are used in process control applications to measure bridge transducers such as load cells, pressure transducers, displacement transducers, and strain gauges. They are also used in medical systems to measure ECG, EEG, and derived values of the body\'s physiological processes. Bridge amplifiers are also used in industry for displacement, displacement sensors, and flow sensors. They are ideal for measuring the DC or AC outputs of these transducers and providing a low-cost solution for signal conditioning.

Transimpedance amplifiers are used in medical systems to condition the very small signals from transducers such as photodiode or silicon bi-directional photodiodes. They are ideal for signal conditioning and filtering of very small signals. Transimpedance amplifiers are also used in instrumentation and process control systems to acquire very low-level signals such as thermocouples and thermistors.

Sample-and-hold amplifiers are ideal for signal conditioning and filtering of noisy signals. They are used in instrumentation, process control and medical systems to measure and control process parameters. These amplifiers are also used in automatic test and measurement systems to provide ratiometric linearity.

Analog-to-digital converters are used in process control systems to convert analog signals to digital signals. They are used in digital systems to improve signal accuracy and eliminate the need for off-the-shelf analog-to-digital converters. They are also used in the medical field to convert analog signals from sensors into digital signals that can be read from a computer.

Working Principle

The ISL28190FRUZ-T7 is an op amp, which is an active component, meaning that it needs an external power supply to operate. The ISL28190FRUZ-T7 is a single-stage amplifier with a gain of approximately 100. It is composed of an input stage, bias circuit, and output stage connected in a feedback loop to provide gain and temperature stability. The input and output of the device have inputs and outputs, as well as power supplies, ground, and enable pins.

The device is configured as a differential amplifier, meaning it amplifies the difference in voltage that is applied to its two input terminals. The gain of the amplifier depends on the ratio of the feedback resistor to the input resistor, which is set by the application. The maximum gain of the amplifier is dependent on the maximum feedback resistance, which is typically limited to 10kΩ. The input common-mode voltage range extends from the negative rail to the positive rail, allowing it to accept a wide range of input voltages.

The device is powered by a single +28V supply. The bias circuitry and output stage provide linearity and temperature stability. The bias voltage is typically set to 1.6V and the power-supply rejection ratio is typically around 65dB. The die temperature is maintained with a thermal pad that provides a thermal path to ground. The output stage provides improved offset voltage, drift and bandwidth. The bandwidth of the device is around 100Hz, and the total harmonic distortion is typically less than 0.01%. The device is able to drive loads of up to 500mA.

Conclusion

The ISL28190FRUZ-T7 is a high performance monolithic amplifier suitable for use in a wide variety of linear, instrumentation, and buffer amplifier applications. It is a single-stage, low offset, low drift, and low input bias current amplifier with an extended common-mode voltage range that extends to the negative rail. The device is operable up to a supply voltage of +28V and is specified for the commercial temperature range of -40°C to +85°C and the extended temperature range of -40°C to +125°C. Its applications include differential amplifiers, instrumentation amplifiers, sample-and-hold amplifiers, transimpedance amplifiers, active filters, integrators, thermocouple amplifiers, bridge amplifiers, analog-to-digital converters, transducers, and sensors. The ISL28190FRUZ-T7 is an ideal choice for a variety of applications requiring low-offset, low-bias, and low-noise operation.

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