ADG728BRUZ

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG728BRUZ is an 8-channel CMOS analog matrix switch featuring a 2-wire serial interface compatible with the I²C standard. It operates on a single supply voltage ranging from 2.7 V to 5.5 V within an industrial temperature range of -40°C to +85°C. The device provides a typical on-resistance of 2.5 Ω and a maximum of 4.5 Ω at 5 V, with a -3 dB bandwidth of 65 MHz. Key electrical parameters include a charge injection of ±3 pC, off-isolation of -75 dB at 1 MHz, and channel-to-channel crosstalk of -75 dB at 1 MHz. It utilizes a 16-lead TSSOP package.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Supports independent control of all eight switches via an 8-bit serial word, allowing any combination of channels to be active simultaneously.
• Features guaranteed break-before-make switching action to prevent momentary shorting during channel transitions.
• Includes two external address pins (A0 and A1) to configure the lower bits of the 7-bit slave address for multi-device bus operation.
• Provides a dedicated RESET pin to clear the input register and force all switches to the OFF condition.

Analog Switches, Multiplexers, Demultiplexers Applications

• Signal routing in data acquisition systems
• Multiplexing and demultiplexing configurations
• Switch arrays requiring flexible signal path management

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify that the component order matches the specific suffix requirements for RoHS compliance and packaging format. Confirm the operating temperature range aligns with the B version specifications. Ensure the design accounts for the 16-lead TSSOP physical dimensions and thermal impedance characteristics during integration.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when an 8-channel matrix switch with serial control is required. Verify that the system supports the I²C-compatible 2-wire interface timing constraints. Ensure the analog signal range remains within the supply rails and that the load conditions do not exceed the continuous current limits specified for the source and drain terminals.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the ADG728/ADG729 family of low-voltage CMOS matrix switches manufactured by Analog Devices Inc. The ADG728 variant specifically provides eight independent channels, whereas the ADG729 offers a dual 4-channel configuration. Both share identical control logic and interface protocols but differ in channel topology.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The ADG729BRUZ serves as a functional alternative if a dual 4-channel configuration is acceptable instead of an 8-channel layout. Other parts in the series may offer different channel counts or packaging options while maintaining similar serial interface compatibility.

Analog Switches, Multiplexers, Demultiplexers FAQ

How is the slave address configured for multiple devices on the same bus?

The five most significant bits of the 7-bit slave address are fixed (10011 for ADG728). The two least significant bits are determined by the logic levels applied to the external A0 and A1 pins, allowing up to four devices to coexist on a single 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 with zeros until a valid write operation occurs.

Can the ADG728 operate as both a multiplexer and a demultiplexer?

Yes, the device can function as a multiplexer, demultiplexer, or switch array because each channel is independently controlled by a bit in the serial word, allowing flexible signal routing directions.