MAX399CSE

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The MAX399CSE is a precision, low power, monolithic CMOS analog switch that is designed to switch signals with very low Off leakage current, On resistance and charge injection. This device is ideal for a variety of applications, such as sample and hold circuits, programmable gain/attenuator circuits, analog multiplexers, and audio applications. The specific features of the MAX399CSE make it an attractive alternative to other analog switches, multiplexers and demultiplexers.

Application Field

The versatility of the MAX399CSE makes it applicable for a variety of applications, such as sample and hold circuits, programmable gain/attenuator circuits, analog multiplexers, and audio applications. It has several advantages over other analog switches, such as its low power, high isolation voltage, and low leakage current and On resistance. Additionally, it comes with a range of features that can be tailored for specific applications. These include:

• High Off Isolation: The high Off isolation of the MAX399CSE allows it to be used in applications such as sample and hold circuits, where the signal must remain isolated during switch off.
• Programmable Gain/Attenuation: The MAX399CSE can be used to set gain/attenuation levels in analog audio circuits.
• High Frequency: The MAX399CSE can be used in high frequency applications due to its low On resistance.
• Low Power: The MAX399CSE draws very low power, making it ideal for portable audio applications that are powered by limited power sources.

Working Principle

The MAX399CSE operates by using a p-channel MOSFET in series with a diode-connected MOSFET. This unique combination of components allows the IN+ and the IN- pins to become isolated when the switch is OFF, thus providing high isolation between the input and the output when the switch is OFF. When the switch is ON, the p-channel MOSFET conducts, allowing current to flow between the IN+ and the IN- pins and allowing the signal to be switched to the output.

Another feature of the MAX399CSE is its low On resistance. This is achieved by having both MOSFETs configured in a complementary-symmetry structure, which reduces the effective source-drain resistance and thus, increases performance. Additionally, the MAX399CSE has a very low Off leakage current, which is beneficial for applications such as sample and hold circuits, where it is important to keep the input isolated from the output when the switch is OFF.

Finally, the MAX399CSE has an adjustable On resistance feature, which can be set with an external resistor. This feature allows the device to be tailored for specific applications, such as programmable gain/attenuation circuits and attenuator circuits.

Conclusion

The MAX399CSE is a precision, low power, monolithic CMOS analog switch that is designed to switch signals with very low Off leakage current, On resistance and charge injection. Its features make it an attractive alternative to other analog switches, multiplexers and demultiplexers. The MAX399CSE is applicable for a variety of applications, such as sample and hold circuits, programmable gain/attenuators circuits, analog multiplexers and audio applications. Its low On resistance and low Off leakage current make it ideal for high frequency applications and sample and hold circuits respectively. Additionally, its adjustable On resistance feature allows the device to be tailored for specific applications.

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