MAX378EWG

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The MAX378EWG is an application-field-limited analog multiplexer/demultiplexer designed by Maxim Integrated. Different from traditional analog switches, the MAX378EWG is specialized for applications where high performance, low power, and ultra-low capacitance are extremely essential. The MAX378EWG is widely used for communications, automotive and multimedia applications.

The working principle of the MAX378EWG is based on a charge sharing architecture. This architecture is designed such that any charge that resistively leaks through a channel is “shared” by all the channels. This enables ultra-low linear off-state channel resistance, which gives the MAX378EWG its distinct advantage in power management applications. By reducing the dissipated power per channel, the device can switch multiple times faster in certain applications. Furthermore, this architecture is also capable of providing channel-to-channel iso-conductance match of 70mΩ when the switch is in the off-state, which is important for applications that need very low crosstalk.

In terms of electrical performance, the MAX378EWG has excellent specifications. It has a break-before-make switching capability and can support a wide range of signal levels with a 10V to 26V common-mode voltage range. It also boasts a wide dynamic range, ranging from low frequency audio to high frequency video signals. Additionally, the device has low on-resistance (<125mΩ) and very low off-state resistances (20Ω). This level of performance gives it an edge in precision control applications such as motor control, where high accuracy is required.

The MAX378EWG also has excellent environmental characteristics. It is temperature compensated and can operate over a wide range of temperatures with minimal drift. Furthermore, it has a very low turn-on and turn-off times (5ns and 10ns respectively). It also features a high isolation voltage (50V min) and is designed for RF isolation when the device is in the off-state, thereby providing excellent performance in low power, multi-signal applications.

In summary, the MAX378EWG is an ideal device for applications requiring high performance, low power, minimal capacitance, excellent turn-on and turn-off times, wide range of signal levels, and operation over a wide temperature range. Its charge sharing architecture provides high channel-to-channel iso-conductance match and reduced channel on-resistance, making it ideal for low power, precision applications in communications, automotive and multimedia applications.

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