MAX4948ETG+

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The MAX4948ETG+ is an analog switch and multiplexer for automotive applications. It is designed for use in Avionics and Automotive systems, as well as in industrial and consumer applications. It allows the connection of up to four analog signals, such as sensors or feedback signals and provides 16 independently-controlled analog switches in a compact 8-pin package. Its integrated ESD protection and low on-resistance makes it ideal for use in harsh operating environments.

The MAX4948ETG+ simplifies design and reduces component count, while providing superior performance. It has a wide operating range of 1.8V to 5.5V, with excellent performance characteristics at a low quiescent current of 2µA, making it ideal for battery powered systems. The device is RoHS-compliant and Halogen-free. It is available in the 8-pin, 0.4mm-pitch TDFN package and is qualified to AEC-Q100 automotive standards.

Application Field

The MAX4948ETG+ analog switch and multiplexer is mainly used for signal routing, multiplexing and connection of analog signals in automotive and industrial systems.

Automotive applications include engine control, powertrain control, climate control, communication systems and navigation systems. It can also be used in industrial systems and consumer electronics such as instrumentation, medical devices and consumer audio systems.

Working Principle

The MAX4948ETG+ integrates sixteen independent analog switches in a single chip. Each switch is capable of connecting one analog signal to any of the four available analog connections. The device can be controlled either by the open-drain control inputs or the two-wire interface. The two-wire interface can be programmed to allow multiple signals to be routed simultaneously.

Each switch has separate input and output pins, as well as a logic input pin which enables the switch. The voltage at the logic input pin determines the state of the switch; a low voltage turns OFF the switch, whereas a high voltage turns ON the switch. The “EN” pin controls the whole device; when the “EN” pin is low, all the switches are turned OFF, and when the “EN” pin is high, all the switches are turned ON. The “EN” pin can be used to turn the device OFF when it is not in use, thus saving power.

The device also has an integrated ESD protection circuit that protects the device from electrostatic discharge. The ESD circuit is triggered when the input pin is shorted to ground, preventing the device from being damaged by electrostatic discharge.

The MAX4948ETG+ also has protective circuitry to protect the device from short-circuit and over-voltage conditions. The device will shut down if it is over-voltage or short-circuited, preventing damage to the device and its connected circuits.

Conclusion

The MAX4948ETG+ is a highly versatile analog switch and multiplexer that can be used in a wide variety of automotive and industrial applications. Its integrated ESD protection and low quiescent power consumption make it ideal for battery powered systems. Its wide operating range and easy two-wire programming make it easy to use in any system.

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