DG309CJ-E3

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DG309CJ-E3 is a part of a larger family of integrated circuits within the interface category known as Analog Switches, Multiplexers, Demultiplexers. Essentially, these type of circuits allow for analog signals (voltages) to be routed from one point to another point based on the conduction state of the switch. Additional features depend on the specific type on IC.

The DG309CJ-E3 is a 8-channel Analog Multiplexer/Demultiplexer, allowing for 8 analog signals to be either multiplexed (switched to one set of output pins for a single signal) or demultiplexed (one signal spliced across 8 output pins).

DG309CJ-E3 is a non-inverting device, with two select pins (A0, A1) to designate the channel to pass through, and 2 enable pins (E0, E1). It allows a maximum off-state leakage current of 0.1uA at 25°C, and on-state resistance of 50ohm at 2mV.

Application field of this IC includes, but not limited to, MIDI converters, medical testers, low power communication systems and controller applications.

The working principle of the DG309CJ-E3 is based on its internal analog switch, which can be driven by both an enable and switch control signal. Depending on the logic states of the two enable pins (E0, E1) and the two select pins (A0, A1), its analytical model will shift the 8 analog interconnects from one position to another, allowing the signal to pass from one set of pins to the other.

When E0 and E1 are both low, all analog switch supports are off, blocking any analog transmission. When pin E0 = high and E1 = low, the selection is made on the two select pins (A0 and A1) and the 8 analog interconnects are moved the the corresponding position.

For the DG309CJ-E3 IC, the maximum voltage and current requirements must be observed. For a VDD supply voltage between 5 to 15V, the maximum current through a single switch must not exceed 2mA, while the maximum on-state resistance must not exceed 50ohm.

In addition, the thermal resistance of the IC itself must be taken into account. Usually, the case temperature should not exceed 85°C.

In conclusion, the DG309CJ-E3 is a versatile IC, with multiple applications including MIDI converters, medical testers, low power communication systems and controller applications. Its working principle is based on the analog switch, which is driven by both an enable and switch control signal and allows for the 8 analog interconnect to be shifted from one position to another, allowing for the signal to be either multiplexed or demultiplexed.

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