DG405AK/883B

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The DG405AK/883B is an analog switch that is part of a family of devices from Analog Devices, Inc., differentiated by a wide range of number of switches, supply voltage range and operating temperature. The switch is manufactured on an InP HBT process, making it suitable for a wide range of application fields requiring high performance analog switching. This paper will provide an overview of the device\'s application field and working principle.

Application Field

The DG405AK/883B is a high performance analog switch designed to route signals with a low voltage and high voltage range of 1.2V - 7.0V. It offers superior switching characteristics, with low on-resistance levels typically between 400 – 750Ω and wide break-before-make specifications. It is sealed in an SSOP package to protect it from environmental conditions, making it ideal for use in applications where shock, vibration, or humidity might be present, such as automotive and industrial equipment.

The device is also suitable for use in low power, general-purpose switching applications, such as audio and RF signal routing and switching, sampling analog signals, and multiplexing. In these applications the device can route signals with low transition times with up to 6000V/m of isolation and up to 150 amps of leakage current. This makes it suitable for a variety of medical and industrial applications, particularly where space is at a premium.

Working Principle

The DG405AK/883B is a single-pole-double-throw (SPDT) switch with two on-board power and logic inputs. The switch is driven by a capacitively coupled driver, which allows for a low supply voltage of 1.2 – 5.0V. The switching uses an internal latch, so the switch remains in an on-state until it is reset. This reduces the amount of power consumed during operation as the switching is done in an inherently low-energy manner.

The device is built with a latch mechanism to ensure reliable operation; it is reset with the control input, which is pulled low to reset the latch and thus the switch. It can also be used in a cascading or daisy-chain configuration since the device is bidirectional. This means the switch can be wired in a series of switches with the first switch in the chain driving the rest of the switches.

In terms of performance, the device features low on-resistance, typically 400 – 750Ω, and break-before-make specifications. It also offers up to 6000V/m of isolation and 150mA of leakage current, making it suitable for a large variety of application fields requiring reliable analog switching. Finally, the device is sealed in an SSOP package, providing it with excellent moisture protection.

Conclusion

In conclusion, the DG405AK/883B is an analog switch from Analog Devices, Inc. It features a wide range of number of switches, supply voltage range, and operating temperature ranging from 1.2V to 7.0V while its low on-resistance and break-before-make specifications make it suitable for a wide range of applications. The device is sealed in an SSOP package and is suitable for use in low power, general-purpose switching applications, such as audio and RF signal routing and switching, sampling analog signals, and multiplexing. Furthermore, it has up to 6000V/m of isolation and up to 150 amps of leakage current, making it ideal for use in applications where shock, vibration, or humidity might be present, such as automotive and industrial equipment.

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