DG419BDQ-T1-E3

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DG419BDQ-T1-E3 Application Field and Working Principle

The DG419BDQ-T1-E3 is an interface device that uses analog switching, multiplexing, and demultiplexing concepts. It is widely used in industrial, automotive, and consumer applications such as sound processing, medical systems, digital signal processing (DSP), and test and measurement systems.

General Description

The DG419BDQ-T1-E3 is a monolithic integrated circuit (IC) containing a quad (4), 8-channel single-pole/double-throw (SPDT) analog switch designed for use in a wide range of applications. It is compatible with any combination of digital and analog signals between 0 and 18V, while switching up to 20mA of peak current. The part has a latency time less than 1µs and it can toggle between states in < 20nS when the control voltage is > 1V. All the analog switches are independently controlled by two digital input signals. The control logic supports TTL, CMOS and LSTTL logic and the analog switches are TTL compatible.

Summary of Features

• Ultra Fast Switching Speed
• Low Bleed-Current
• Low Crosstalk
• Low "On" Resistance (RDSon)
• High Off Isolation
• Low Capacitance Between Control and Output
• SPDT Structure
• Compatibility with Standard Logic

Working Principle

The DG419BDQ-T1-E3 uses two-pole/ten-section option to switch signals. The four individual switches are addressed via the two digital input signals. Each digital input controls two switches. When the digital input is at logic low, both switches will move in tandem, either to the closed or open state. When the digital input is at logic high, one switch is open and the other is closed. In this way eight channels can be switched independently, in parallel, by the two control signals.

The analog switches are designed to pass signals in the 0-18V range up to 20mA of peak current with minimal drop in voltage. The low “on” resistance (RDSon) ensures that the analog switches are able to pass signals with minimal distortion or attenuation. The part also features low crosstalk between channels, high off isolation and low parasitic capacitances. This ensures minimal bleed-current and improved performance.

Applications

The DG419BDQ-T1-E3 can be used in a wide range of applications requiring analog switching, multiplexing and demultiplexing such as sound processing, medical systems, DSPs, test and measurement systems, and automotive systems. Some of the applications for this device are:

• Digital Signal Processors
• Digital Audio Switches
• Analog/Digital Signal control
• Multiplexers
• Power Supplies
• Test & Measurement Equipment
• Automatic Test Equipment

The DG419BDQ-T1-E3 is combined with a variety of external filters and amplifiers, a variety of multiplexers, and demultiplexers, and it can be used in a number of applications such as delay lines, sample and hold functions, digital to analog conversion, and random access memories.

Conclusion

The DG419BDQ-T1-E3 is an analog switch that uses multiplexing and demultiplexing concepts to provide an interface between digital and analog signals. It features low on resistance, low crosstalk, high off isolation, and low capacitance between control and output signal lines. The part also has an ultra-fast switching speed and is compatible with a wide range of logic. The part is used in various industries including sound processing, medical systems, DSPs, test and measurement systems, automotive systems, and more.

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