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ADG729:  CMOS, Low Voltage, 2 Wire, Serially Controlled Dual 4 to 1 Matrix Switch

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The ADG729 is a CMOS analog matrix switch with a serially controlled 2-wire interface. It is a dual 4-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
  1. 2-Wire Serial Interface.
  2. Single Supply Operation. The ADG728 and ADG729 are fully specified and guaranteed with 3 V and 5 V supply rails.
  3. Low On Resistance 2.5 Ω typical.
  4. Any configuration of switches may be on at any one time.
  5. Guaranteed Break-Before-Make Switching Action.
  6. Small 16-Lead TSSOP Package.


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


  • 2-Wire Serial Interface
  • 2.7 V to 5.5 V Single Supply
  • 2.5 Ω On Resistance
  • 0.75 Ω On-Resistance Flatness
  • 100 pA Leakage Currents
  • Dual 4-to-1 Matrix Switch
  • Power-On Reset
  • Small 16-Lead TSSOP Package
  • Qualified for Automotive Applications

Functional Block Diagram for ADG729


Наименование Тип контента Тип файлов
ADG728/ADG729: CMOS, Low Voltage, 2-Wire Serially Controlled, Matrix Switches Datasheet  (Rev C, 06/2012) (pdf, 151 kB) Технические описания PDF
AN-1024: How to Calculate the Settling Time and Sampling Rate of a Multiplexer  (pdf, 210 kB) Статьи по применению PDF
AN-686: Implementing an I2C® Reset  (pdf, 44 kB) Статьи по применению PDF
Data-acquisition system uses fault protection
By Catherine Redmond, Analog Devices, Inc. (EDN, 4/15/2004)
Технические статьи HTML
CMOS Switches Offer High Performance in Low Power, Wideband Applications  (pdf, 320 kB)
by Theresa Corrigan and Ray Goggin, Analog Devices, Inc. (High Frequency Electronics, February 2004)
Технические статьи PDF
Temperature monitor measures three thermal zones
by Susan Pratt, Analog Devices, Inc. (EDN, 12/11/03)
Технические статьи HTML
Enhanced Multiplexing for MEMS Optical Cross Connects
by James Caffrey (Fiberoptic Product News, 8/2003)
Технические статьи HTML
Switches and Multiplexers Product Selection Guide  (pdf, 1462 kB) Product Selection Guide PDF
Switch Parametric Search Product Selection Guide HTML
RAQs index Rarely Asked Questions HTML
Словарь терминов Глоссарий HTML

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