ISL28291FBZ

Voltage - Input Offset:	270µV
Base Part Number:	ISL28291
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply, Single/Dual (±):	3 V ~ 5.5 V, ±1.5 V ~ 2.75 V
Current - Output / Channel:	130mA
Current - Supply:	2.6mA
Series:	--
Current - Input Bias:	3µA
-3db Bandwidth:	61MHz
Slew Rate:	17 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	Voltage Feedback
Part Status:	Active
Packaging:	Tube

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ISL28291FBZ Application Field and Working Principle

The ISL28291FBZ is a versatile and powerful instrumentation amplifier from Intersil, capable of providing many benefits to instrumentation, signal conditioning and data acquisition applications. This amplifier is ideal for applications where bandwidth, gain accuracy and signal integrity are critical.

Application Field

The ISL28291FBZ is used in a wide range of applications, including industrial, medical, automotive, and consumer. In the industrial sector, the ISL28291FBZ is used in process automation, electrical power stations, metrology, and test and measurement equipment. For example, the ISL28291FBZ is used in gas and liquid level measurements, strain gauges, pressure sensors, velocity and acceleration sensors, as well as in laboratory and industrial automation systems. In the medical sector, the ISL28291FBZ is used in patient monitoring, medical imaging, and laboratory diagnostic devices. In automotive, the ISL28291FBZ is used in automotive control systems, engine monitoring systems, electronic fuel injection systems and vehicle navigation systems. In the consumer sector, the ISL28291FBZ is used in game controllers, audio and video systems, GPS navigation devices, and home automation systems.

Working Principle

The ISL28291FBZ is a low-power instrumentation amplifier with high input impedance, low output impedance, adjustable gain, low noise and high common mode rejection ratio (CMRR). It is capable of providing adjustable gain ranges from 4 to 1024 and can operate with a supply voltage of 3 to 5.5 V. The differential input signal is applied to the amplifier’s non-inverting and inverting inputs. The gain of the amplifier is determined by the ratio of an external resistive divider network connected between the amplifier’s inputs and the amplifier’s output. The amplified output is obtained at the amplifier’s output terminal.The amplifier also includes a power-on reset (POR) circuit which is active-high, capable of resetting all logic low signals on power-up, ensuring proper system initialization. It also has a CMOS shutdown control pin which can be used to turn off the amplifier and reduce power consumption.In addition, the ISL28291FBZ also offers good precision and stability, with gain accuracy and linearity of 0.02 %, and power supply rejection ratio (PSRR) of 60 dB. It can output an output voltage swing of up to ±5 V and provide a total harmonic distortion (THD) of -90 dB.

Conclusion

The ISL28291FBZ is a versatile and powerful instrumentation amplifier with a wide range of uses in industrial, medical, automotive, and consumer applications. Its adjustable gain, low noise, low output impedance and high common mode rejection ratio make it ideal for applications where bandwidth, gain accuracy and signal integrity are critical. It also offers good precision and stability, with gain accuracy and linearity of 0.02 % and power supply rejection ratio of 60 dB.

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