ADG729BRU-REEL7

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG729BRU-REEL7 is a CMOS analog matrix switch featuring a dual 4-channel (2 x 4:1) configuration housed in a 16-lead TSSOP package. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a maximum power dissipation of 100 µW and a maximum supply current of 20 µA. The device utilizes an I²C-compatible 2-wire serial interface for control, supporting clock frequencies up to 400 kHz. Key electrical parameters include a maximum on-resistance of 4.5 Ω, a typical bandwidth of 100 MHz, and switching times of 95 ns (ON) and 85 ns (OFF). It functions within an industrial temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Dual 4-channel matrix switch architecture allowing independent channel control via an 8-bit serial word.
• I²C compatible 2-wire serial interface with user-configurable address pins for multi-device bus integration.
• Guaranteed break-before-make switching action to prevent momentary shorting during state transitions.
• Low power consumption suitable for battery-operated or energy-efficient systems.

Analog Switches, Multiplexers, Demultiplexers Applications

• Data acquisition systems requiring signal routing
• Communication equipment for line selection
• Audio and video signal switching matrices
• Automotive test and measurement instrumentation

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to the required tape and reel packaging quantity when sourcing components. Confirm that the B version designation aligns with the necessary industrial temperature range specifications for the intended operational environment. Ensure compatibility with existing I²C bus voltage levels before finalizing procurement orders.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a dual 4-channel multiplexer topology is required rather than a single 8-channel array. The ADG729 offers distinct slave addressing compared to the ADG728, facilitating mixed-device buses. Consider the 100 MHz bandwidth and low charge injection characteristics for high-frequency signal integrity requirements in precision analog applications.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the Analog Devices ADG728/ADG729 family of serially controlled CMOS matrix switches. While functionally similar to the ADG728, it provides a different internal channel mapping optimized for dual 4-channel configurations. Both devices share the same physical footprint and control protocol, enabling design flexibility within the same product line.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The ADG728BRU-REEL7 serves as a functional substitute if the application requires an 8-channel single-ended matrix instead of two 4-channel banks. Verify that the specific channel mapping differences between the ADG728 and ADG729 do not impact the PCB layout or signal routing logic.

Analog Switches, Multiplexers, Demultiplexers FAQ

How are the slave addresses configured for multiple devices on the bus?

The ADG729 uses a fixed 7-bit base address where the two least significant bits are determined by the logic states of the external A0 and A1 pins, allowing up to four devices per bus.

What happens to the switch states upon power-up?

Upon power-up, all switches default to the OFF condition, and the internal shift register is initialized to zeros until a valid write operation occurs.

Does the device support simultaneous switching of channels?

Yes, each bit of the 8-bit serial word controls one switch independently, allowing any combination of channels to be ON simultaneously.