CMOS, Low Voltage, 2 Wire, Serially Controlled Dual 4 to 1 Matrix Switch
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.
- Data Acquisition Systems
- Communications Systems
- Relay Placement
- Audio and Video Switching
- Automatic Test Equipment
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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