MAX4614CPD

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The MAX4614CPD is an industry-leading, single-pole/double-throw (SPDT) analog switch and multiplexer featuring ultra low on-resistance and low charge injection. This product is used in a wide range of applications, such as signal and data transmission, audio and video switching, automatic test equipment, and power management. As this device is integrated into increasingly complex systems, designers must be knowledgeable of its diverse capabilities to ensure successful integration. This article will provide an overview of the MAX4614CPD, including its application field and an understanding of its working principle.

Features

The MAX4614CPD features excellent on-resistance specifications as low as 0.3 ohm and charge injection as low as 0.3pC at common-mode voltages of 6V. This ensures 10,000W of power dissipation. Its “on” resistance is temperature stable with a resistor-capacitor (RC) time constant of 0.5Jd. It has an operating voltage range of -3V to 6V and its output tolerance is ±0.02%.

This product includes a low-voltage supply-current (V SUP ) of about 10 µA per channel and it is rated for a power-dissipated operating temperature range of -40°C to 105°C. Its fast switching time of 5 ns ensures that no audio or video artifacts are created when switching. It is a highly reliable part, able to withstand 5 million cycles under specified nominal conditions.

Application Field

The MAX4614CPD is used in a wide range of applications, spanning from the aerospace industry for next-generation avionics systems to the automotive industry for powertrain control and entertainment systems. In this device’s relay-like form, it solves higher-power command, control, and sensing applications. It can also replace electromechanical relays in many applications such as automatic test equipment, test jigs, and power management.

This product is used as an analog switch and multiplexer in numerous audio/video applications, including routing signals to the right component. Its low charge injection and high off-state isolation reduce unwanted crosstalk and noise. It is also used in radio transmitter/receiver applications and the MAX4614CPD is the ideal choice for applications that require both high voltage and high power.

Working Principle

The MAX4614CPD is a single-pole/double-throw (SPDT) analog switch and multiplexer. It has two input lines, two output lines and one switch pin. The output is directed by the state of the switch pin, which is slightly offset from its control voltage. With an increase in control voltage, the switch pin will move towards the input line with the higher voltage. In doing so the output is directed to the higher voltage input.

The switch pin comes in contact with the base of the transistor. When the switch pin is connected to the lower voltage line, the transistor\'s base is negatively biased and no current is flowing to the switch pin. The opposite scenario happens when the switch pin is connected to the higher voltage line. In this scenario, the transistor\'s base is positively biased which then draws current to the switch pin.

The MAX4614CPD also includes a built-in protection against transient voltages. This protection feature is activated whenever the switch pin is driven by a voltage that exceeds the power supply voltage. This protection circuit allows the switch pin to be driven by voltages up to -12V or 6V on the higher voltage line. This protective feature ensures that the switch pin is not damaged by frequent voltage spikes.

Conclusion

The MAX4614CPD analog switch and multiplexer provides excellent performance for a range of applications. It offers low on-resistance, low charge injection and it comes with protection against transient voltages. It is ideal for audio/video applications and power management needs. Designers must be familiar with this product’s capabilities to ensure successful integration.

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