Analog Devices Inc. ADG709BRUZ

Overview of the ADG709BRUZ Analog Multiplexer

The ADG709BRUZ from Analog Devices is a CMOS analog multiplexer/demultiplexer tailored for low-voltage, high-performance signal routing applications. As part of the ADG708/ADG709 family, the ADG709BRUZ variant offers four differential channels with 4:1 channel selection, packaged in a space-saving 16-lead TSSOP. Its single-supply (1.8V to 5.5V) and dual-supply (±2.5V) operation, combined with low on-resistance and high channel matching, make it particularly attractive for engineers seeking reliable and efficient signal multiplexing solutions.

Main Characteristics of the ADG709BRUZ Multiplexer

Highlighting the strengths of the ADG709BRUZ is central for product selection. The device demonstrates a low on-state resistance (Ron) of typically 3 Ω under a 5V supply, with tight channel-to-channel matching (as low as 0.4 Ω), ensuring minimal signal distortion across channels. Its break-before-make switching feature prevents unwanted channel shorting during select line transitions. The ADG709BRUZ stands out for its low leakage currents (typically 10 pA), low power consumption (<0.01 mW), and TTL/CMOS-compatible digital inputs, allowing seamless integration into modern low-voltage systems.

Designed with automotive qualification in mind, the part is rated for an extended operating temperature range from -40°C to +125°C, supporting robust performance in demanding environments.

Electrical Specifications and Switching Behavior of the ADG709BRUZ

From an engineering standpoint, the ADG709BRUZ provides detailed DC and AC electrical specifications across its operational voltage and temperature ranges. Under a 5V supply, the typical on-resistance is 3 Ω, with a maximum value of 7 Ω even at higher temperatures. With a 3V supply, Ron increases to a typical 8 Ω. The device’s broad signal range (0V to VDD for single supply, VSS to VDD for dual supply) means it can route both ground-referenced and differential analog signals.

Switching performance is essential in time-sensitive applications; the ADG709BRUZ features a quick channel transition time (Ton) as fast as 14 ns (typical) and 25 ns (maximum), with a corresponding break-before-make time of 8 ns (typical). Its impressive off-isolation (-80 dB at 1 MHz) and low charge injection (±3 pC) minimize crosstalk and switching disturbances, crucial for high-precision analog front ends or data acquisition systems. The device supports a –3 dB bandwidth of 55 MHz, suitable for multiplexing signals in broadband and audio applications.

Packaging Information and Handling Guidelines for the ADG709BRUZ

For PCB layout and manufacturing engineers, the ADG709BRUZ is available in a compact 16-lead TSSOP package (0.173" width/4.40 mm). The surface-mount form factor and RoHS3 compliance facilitate integration into high-density, environmentally conscious designs. The moisture sensitivity level is rated at MSL 1 (unlimited), simplifying handling and storage in automated production.

Use Cases for the ADG709BRUZ Multiplexer

The combination of low Ron, fast switching, and wide supply compatibility positions the ADG709BRUZ for a range of precision analog switching roles. Targeted applications include:

Data acquisition modules requiring multiple sensor or signal inputs.

Communication system routing, especially where high channel density is required.

Replacement for mechanical relays in automated test equipment.

Audio and video switching–thanks to low distortion and high bandwidth.

Battery-powered and portable instrumentation, leveraging the device’s low quiescent current.

The ADG709BRUZ can serve as both a multiplexer and demultiplexer, supporting flexible signal routing in systems where analog signals must be distributed or selectively connected.

Engineering Design Guidelines for Integrating the ADG709BRUZ

To fully capitalize on the ADG709BRUZ’s capabilities, engineers should account for its supply requirements, logic input compatibility, and analog signal range. The device is fully guaranteed for operation at both 3V and 5V single supplies, and at ±2.5V dual supplies, with consistent performance across these rails. Flat on-resistance and minimal charge injection support fidelity in sampled analog systems, while the small package footprint allows for high channel count implementations on crowded boards.

Designers selecting the ADG709BRUZ should evaluate their systems for input signal amplitude (ensuring compatibility with the supply), board layout for minimized crosstalk, and consider ESD precautions during assembly. For time-critical multiplexing, the device’s switching specifications allow reliable sequencing with high-speed microcontrollers and FPGAs.

Alternative or Substitute Models for the ADG709BRUZ

In applications where the ADG709BRUZ is either unavailable or alternative sourcing is necessary, engineers may consider other devices within the ADG708/ADG709 family. The ADG708, for example, offers 8:1 single-ended switching in a similar package and supply range, making it a straightforward alternative when differential routing is not required.

For other manufacturers, similar low-voltage analog multiplexers in 16-lead TSSOP packages with comparable Ron, leakage performance, and supply voltage ranges should be scrutinized for compatibility, but special attention must be paid to switching geometry (number of channels), digital logic thresholds, and switching speed.

Conclusion

The ADG709BRUZ from Analog Devices presents a robust, flexible, and high-performance analog multiplexer solution for engineers and procurement specialists developing modern electronic systems. Its low on-resistance, fast switching times, and broad supply voltage compatibility make it suitable for data acquisition, communications, and sensor multiplexing–especially where circuit reliability and analog signal integrity are paramount. By understanding its detailed performance parameters and thoughtful application integration, design engineers can harness the ADG709BRUZ to maximize efficiency and flexibility in next-generation electronic architectures.