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ADG444 Datasheet(PDF) 1 Page - Analog Devices |
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ADG444 Datasheet(HTML) 1 Page - Analog Devices |
1 / 9 page ADG441 ADG444 D4 S4 D3 S3 D2 S2 D1 S1 IN1 IN2 IN3 IN4 ADG442 D4 S4 D3 S3 D2 S2 D1 S1 IN1 IN2 IN3 IN4 SWITCHES SHOWN FOR A LOGIC "1" INPUT One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a LC2MOS Quad SPST Switches ADG441/ADG442/ADG444 FEATURES 44 V Supply Maximum Ratings VSS to VDD Analog Signal Range Low On Resistance (< 70 Ω) Low ∆R ON (9 Ω max) Low RON Match (3 Ω max) Low Power Dissipation Fast Switching Times tON < 110 ns tOFF < 60 ns Low Leakage Currents ( 3 nA max) Low Charge Injection (6 pC max) Break-Before-Make Switching Action Latch-Up Proof Plug-In Upgrade for DG201A/ADG201A, DG202A/ADG202A, DG211/ADG211A Plug in Replacement for DG441/DG442/DG444 APPLICATIONS Audio and Video Switching Automatic Test Equipment Precision Data Acquisition Battery Powered Systems Sample Hold Systems Communication Systems FUNCTIONAL BLOCK DIAGRAMS GENERAL DESCRIPTION The ADG441, ADG442 and ADG444 are monolithic CMOS devices comprising four independently selectable switches. They are designed on an enhanced LC 2MOS process that provides low power dissipation yet gives high switching speed and low on resistance. The on resistance profile is very flat over the full analog input range ensuring good linearity and low distortion when switching audio signals. High switching speed also makes the parts suit- able for video signal switching. CMOS construction ensures ultralow power dissipation making the parts ideally suited for portable and battery powered instruments. The ADG441, ADG442 and ADG444 contain four indepen- dent SPST switches. Each switch of the ADG441 and ADG444 turns on when a logic low is applied to the appropriate control input. The ADG442 switches are turned on with a logic high on the appropriate control input. The ADG441 and ADG444 switches differ in that the ADG444 requires a 5 V logic power supply which is applied to the VL pin. The ADG441 and ADG442 do not have a VL pin, the logic power supply being generated internally by an on-chip voltage generator. Each switch conducts equally well in both directions when ON and has an input signal range that extends to the power sup- plies. In the OFF condition, signal levels up to the supplies are blocked. All switches exhibit break-before-make switching action for use in multiplexer applications. Inherent in the design is low charge injection for minimum transients when switching the digital inputs. PRODUCT HIGHLIGHTS 1. Extended Signal Range The ADG441/ADG442/ADG444 are fabricated on an en- hanced LC 2MOS, trench-isolated process, giving an in- creased signal range that extends to the supply rails. 2. Low Power Dissipation 3. Low RON 4. Trench Isolation Guards Against Latch Up A dielectric trench separates the P and N channel transistors thereby preventing latch up even under severe overvoltage conditions. 5. Break-Before-Make Switching This prevents channel shorting when the switches are config- ured as a multiplexer. 6. Single Supply Operation For applications where the analog signal is unipolar, the ADG441/ADG442/ADG444 can be operated from a single rail power supply. The parts are fully specified with a single +12 V power supply. |
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