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ADG728 CMOS, Low Voltage, 2 Wire, Serially Controlled Single 8 to 1 Matrix Switch

The ADG728 is a CMOS analog matrix switch with a serially controlled 2-wire interface. It is an 8-channel matrix switch. On resistance is closely matched between switches and very flat over the full signal range. This part can operate equally well as a multiplexer, demultiplexer or switch array and the input signal range extends to the supplies.  The ADG728 and ADG729 utilize a 2-wire serial interface that is compatible with the I2C™ interface standard. Both have two external address pins (A0 and A1). This allows the 2 LSBs of the 7-bit slave address to be set by the user. Four of each of the devices can be connected to the one bus. The ADG728 also has a RESET pin that should be tied high if not in use. Each channel is controlled by one bit of an 8-bit word. This means that these devices may be used in a number of different configurations; all, any, or none of the channels may be on at any one time. On power-up of the device, all switches will be in the OFF condition and the internal shift register will contain all zeros. All channels exhibit break-before-make switching action preventing momentary shorting when switching channels. The ADG728 and ADG729 are available in 16-lead TSSOP packages. Product Highlights 2-Wire Serial Interface. Single Supply Operation. The ADG728 and ADG729 are fully specified and guaranteed with 3 V and 5 V supply rails. Low On Resistance 2.5 Ω typical. Any configuration of switches may be on at any one time. Guaranteed Break-Before-Make Switching Action. Small 16-Lead TSSOP Package. Applications Data Acquisition Systems Communications Systems Relay Placement Audio and Video Switching Automatic Test Equipment

Each channel is controlled by one bit of an 8-bit word. This means that these devices may be used in a number of different configurations; all, any, or none of the channels may be on at any one time.

On power-up of the device, all switches will be in the OFF condition and the internal shift register will contain all zeros.

All channels exhibit break-before-make switching action preventing momentary shorting when switching channels.

The ADG728 and ADG729 are available in 16-lead TSSOP packages.

Applications

• Data Acquisition Systems
• Communications Systems
• Relay Placement
• Audio and Video Switching
• Automatic Test Equipment

Data Sheets

Application Notes

User Guides

Order Information

Evaluation Boards

Reference Materials

• Product Selection Guide：Switches and Multiplexers Product Selection Guide
• Technical Articles：CMOS Switches Offer High Performance in Low Power, Wideband Applications