Add to Signal Chain Designer

ADG749:  CMOS 1.8 V to 5.5 V, 2.5 Ω 2:1 Mux/SPDT Switch in SC70 Package

Product Details

The ADG749 is a monolithic CMOS SPDT switch. This switch is designed on a submicron process that provides low power dissipation yet gives high switching speed, low on resistance, and low leakage currents.

The ADG749 can operate from a single-supply range of 1.8 V to 5.5 V, making it ideal for use in battery-powered instruments and with the new generation of DACs and ADCs from Analog Devices, Inc.

Each switch of the ADG749 conducts equally well in both directions when on. The ADG749 exhibits break-before-make switching action.<.p>

Because of the advanced submicron process, −3 dB bandwidths of greater than 200 MHz can be achieved.

The ADG749 is available in a 6-lead SC70 package.

  1. 1.8 V to 5.5 V Single-Supply Operation. The ADG749 offers high performance, including low on resistance and fast switching times, and is fully specified and guaranteed with 3 V and 5 V supply rails.
  2. Very Low RON (5 Ω Maximum at 5 V and 10 Ω Maximum at 3 V). At 1.8 V operation, RON is typically 40 Ω over the temperature range.
  3. Automotive Temperature Range: −40°C to +125°C.
  4. On Resistance Flatness (RFLAT(ON)) (0.75 Ω typical).
  5. −3 dB Bandwidth > 200 MHz.
  6. Low Power Dissipation. CMOS construction ensures low power dissipation.
  7. Fast tON/tOFF.
  8. Tiny, 6-lead SC70 Package.
  • Battery-powered systems
  • Communication systems
  • Sample-and-hold systems
  • Audio signal routing
  • Video switching
  • Mechanical reed relay replacement


  • 1.8 V to 5.5 V Single Supply
  • 5 Ω (maximum) on resistance
  • 0.75 Ω (typical) on resistance flatness
  • Automotive temperature range:
    −40°C to +125°C
  • –3 dB bandwidth > 200 MHz
  • Rail-to-rail operation
  • 6-lead SC70 package
  • Fast switching times
    tON = 12 ns
    tOFF = 6 ns
  • Typical power consumption (< 0.01 μW)
  • TTL/CMOS compatible

Functional Block Diagram for ADG749


Title Content Type File Type
ADG749: CMOS 1.8 V to 5.5 V, 2.5 Ω2:1 Mux/SPDT Switch in SC70 Package Data Sheet  (Rev C, 12/2011) (pdf, 859 kB) Data Sheets PDF
AN-282: Fundamentals of Sampled Data Systems  (pdf, 2131 kB) Application Notes PDF
AN-355: Behind the Switch Symbol  (pdf, 132 kB)
Use CMOS Analog Switches More Effectively When You Consider Them as Circuits
Application Notes PDF
Data-acquisition system uses fault protection
By Catherine Redmond, Analog Devices, Inc. (EDN, 4/15/2004)
Technical Articles 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)
Technical Articles PDF
Temperature monitor measures three thermal zones
by Susan Pratt, Analog Devices, Inc. (EDN, 12/11/03)
Technical Articles HTML
Enhanced Multiplexing for MEMS Optical Cross Connects
by James Caffrey (Fiberoptic Product News, 8/2003)
Technical Articles 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
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADG749 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADG749 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADG749BKSZ-REEL Status: Production 6 ld SC70 6 Ind Reel, 10000 - $0.71 Y  Material Info Notify Me Purchase
ADG749BKSZ-REEL7 Status: Production 6 ld SC70 6 Ind Reel, 3000 - $0.71 Y  Material Info Notify Me Purchase Sample
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

content here.
content here.

Review this Product