MAX4378FASD+T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Amplifier Type:	Current Sense
Number of Circuits:	4
Output Type:	--
Slew Rate:	10 V/µs
-3db Bandwidth:	1.7MHz
Current - Input Bias:	800µA
Current - Supply:	1mA
Voltage - Supply, Single/Dual (±):	3 V ~ 28 V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Base Part Number:	MAX4378

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MAX4378FASD+T: Application Field and Working Principle

The MAX4378FASD+T IC is an instrumentation amplifier and a buffer made of low noise, low power, wide bandwidth CMOS technology. It is primarily used for the measurement applications, such as sensors, position, pressure and temperature. The chip is capable of providing excellent low-level signal amplification, dynamic performance, and a wide operating range for these types of applications.

Scaling Capacitors

The MAX4378FASD+T has two external scaling capacitors, C1 and C2, which are used to effectively scale the input signal voltage. This scaling capability allows the resistor-based gain to be adjusted to meet the application’s needs. The scaling capacitors also provide a simple compensation system for the feedback path, so that the desired 2kHz gain-bandwidth product can be achieved.

Input Amplifier

The input amplifier is designed to provide low noise, high gain and wide bandwidth performance. The amplifier contains an adjustable current source which offers both dynamic range and high linearity control. Additionally, the gain is adjustable through the scaling resistors.

Output Amplifier

The output amplifier of the MAX4378FASD+T is designed to provide low noise and wide bandwidth performance. It uses a digitally tuned low-power amplifier stage to minimize distortion, and offers high output voltage swing without any additional external components.

Power Supply

The MAX4378FASD+T requires a single power supply for operation. The device requires a 5V supply for the input amplifier, and a 9V to 18V supplies for the output amplifier. Additionally, the chip has an adjustable current-limit protection circuit which ensures that the device does not exceed the maximum specified power dissipation.

Features

The MAX4378FASD+T offers several features which make it an ideal solution for a variety of measurement applications. These features include:

• Low noise, high speed input amplifier
• High output voltage swing over temperature
• Wide bandwidth (2kHz)
• Low Power consumption
• Adjustable gain
• High linearity
• Wide operating range (2V to 5V)
• C1 and C2 scaling
• Current limit protection

Applications

The MAX4378FASD+T is well-suited for a variety of applications, including:

• Low noise amplifiers
• High speed data acquisition
• Measuring pressure, temperature, and position
• Industrial sensors
• Medical instrumentation

Conclusion

The MAX4378FASD+T is an instrumentation amplifier and buffer IC which offers excellent low-noise signals, high dynamic performance and an adjustable gain-bandwidth product. Its wide operating range and scaling capacitors make it ideal for a variety of measurement applications. The device also features high linearity and current protection features, making it a reliable and cost effective solution.

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