MAX4147ESD+

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MAX4147ESD is a high-performance, low-power CMOS rail-to-rail input/output instrumentation amplifier. This instrumentation amplifier offers high precision performance with rail-to-rail input and output stages and excellent small-signal accuracy specifications. The high gain and wide bandwidth also permit applications such as servo systems and motion control, where precision linear phase responses are desired. The MAX4147ESD provides a modest voltage differential gain of 2V/V and is capable of driving caps up to 2 ATEs. The output is guaranteed to reach rail-to-rail level when driving a maximum load of 10kΩ.

Working principle of MAX4147ESD is based on differential amplifier configuration. It has two inverting and non-inverting input pairs and two outputs. One output is inverted whereas the other is non-inverted. Difference between two input signals is amplified by a differential amplifier. An offset voltage (Vos) is also added to it which can be adjusted by Bias Terminal. The amplified differential signal is then fed to a single ended amplifier which further amplifies the signal, in order to provide high gain. This signal is then fed to two output stages. One output stage is referenced to ground and the other output stage is referenced to Vdd (power supply). By adjusting Bias Terminal, Vos can be adjusted to achieve desired gain control. The MAX4147ESD also features an over-voltage comparator which provides an over-voltage shutdown when line supply exceeds a preset limit.

MAX4147ESD+ application field can be found in many industries such automation, automotive, consumer, industrial and medical electronics. It is widely used for measuring, sensing and controlling applications such as transducers, strain gauges, transducers and motor control. As it has low power, it is suitable for battery operated systems. Its rail-to-rail input and output stages make it suitable for analog to digital conversion and wide dynamic range amplifiers. It is also widely used in analog audio systems, due to its high rejection ratio. It can be used in automotive and consumer applications, such as USB, audio, PWM and dc/dc converters.

MAX4147ESD+ is an ideal choice for instrumentation amplifier, due to its high precision performance, rail-to-rail input and output stages and excellent small-signal accuracy specifications. It also features an over-voltage comparator which makes it safer for use in tough industrial environment. Its wide bandwidth and high gain feature make it suitable for use in power applications, particularly servo systems and motion control, where precision linear phase responses are desired.

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