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ADG738 Dataheets PDF



Part Number ADG738
Manufacturers Analog Devices
Logo Analog Devices
Description CMOS/ Low-Voltage/ 3-Wire Serially-Controlled/ Matrix Switches
Datasheet ADG738 DatasheetADG738 Datasheet (PDF)

a FEATURES 3-Wire Serial Interface 2.7 V to 5.5 V Single Supply 2.5 ⍀ On Resistance 0.75 ⍀ On-Resistance Flatness 100 pA Leakage Currents Single 8-to-1 Multiplexer ADG738 Dual 4-to-1 Multiplexer ADG739 Power-On Reset TTL/CMOS-Compatible APPLICATIONS Data Acquisition Systems Communication Systems Relay Replacement Audio and Video Switching CMOS, Low-Voltage, 3-Wire Serially-Controlled, Matrix Switches ADG738/ADG739 FUNCTIONAL BLOCK DIAGRAMS ADG738 S1 S1A DA S4A D S1B DB S8 INPUT SHIFT REGISTER S.

  ADG738   ADG738



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a FEATURES 3-Wire Serial Interface 2.7 V to 5.5 V Single Supply 2.5 ⍀ On Resistance 0.75 ⍀ On-Resistance Flatness 100 pA Leakage Currents Single 8-to-1 Multiplexer ADG738 Dual 4-to-1 Multiplexer ADG739 Power-On Reset TTL/CMOS-Compatible APPLICATIONS Data Acquisition Systems Communication Systems Relay Replacement Audio and Video Switching CMOS, Low-Voltage, 3-Wire Serially-Controlled, Matrix Switches ADG738/ADG739 FUNCTIONAL BLOCK DIAGRAMS ADG738 S1 S1A DA S4A D S1B DB S8 INPUT SHIFT REGISTER S4B DOUT INPUT SHIFT REGISTER DOUT ADG739 SCLK DIN SYNC RESET SCLK DIN SYNC GENERAL DESCRIPTION PRODUCT HIGHLIGHTS The ADG738 and ADG739 are CMOS analog matrix switches with a serially-controlled 3-wire interface. The ADG738 is an 8-channel matrix switch, while the ADG739 is a dual 4-channel matrix switch. On resistance is closely matched between switches and very flat over the full signal range. The ADG738 and ADG739 utilize a 3-wire serial interface that is compatible with SPI™, QSPI™, MICROWIRE™, and some DSP interface standards. The output of the shift register DOUT enables a number of these parts to be daisy-chained. On power-up, the internal shift register contains all zeros and all switches are in the OFF state. Each switch conducts equally well in both directions when on, making these parts suitable for both multiplexing and demultiplexing applications. As each switch is turned on or off by a separate bit, these parts can also be configured as a type of switch array, where any, all, or none of the eight switches may be closed at any time. The input signal range extends to the supply rails. All channels exhibit break-before-make switching action, preventing momentary shorting when switching channels. The ADG738 and ADG739 are available in 16-lead TSSOP packages. 1. 3-Wire Serial Interface. 2. Single Supply Operation. The ADG738 and ADG739 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 or off at any one time. 5. Guaranteed Break-Before-Make Switching Action. 6. Small 16-lead TSSOP Package. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corporation. 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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 ADG738/ADG739–SPECIFICATIONS1 (V Parameter ANALOG SWITCH Analog Signal Range On Resistance (RON) On-Resistance Match Between Channels (∆RON) On-Resistance Flatness (RFLAT(ON)) LEAKAGE CURRENTS Source OFF Leakage IS (OFF) Drain OFF Leakage ID (OFF) Channel ON Leakage ID, IS (ON) DIGITAL INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current, IINL or IINH CIN, Digital Input Capacitance DIGITAL OUTPUT Output Low Voltage COUT, Digital Output Capacitance DYNAMIC CHARACTERISTICS2 tON tOFF Break-Before-Make Time Delay, tD Charge Injection Off Isolation B Version –40؇C 25؇C to +85؇C 0 V to VDD 2.5 4.5 5 0.4 0.8 1.2 ± 0.01 ± 0.1 ± 0.01 ± 0.1 ± 0.01 ± 0.1 DD = 5 V ؎ 10%, GND = 0 V, unless otherwise noted.) Unit V Ω typ Ω max Ω typ Ω max Ω typ Ω max nA typ nA max nA typ nA max nA typ nA max V min V max µA typ µA max pF typ max pF typ ns typ ns max ns typ ns max ns typ ns min pC typ dB typ dB typ dB typ dB typ Test Conditions/Comments VS = 0 V to VDD, IS = 10 mA; Test Circuit 1 VS = 0 V to VDD, IS = 10 mA VS = 0 V to VDD, IS = 10 mA VDD = 5.5 V VD = 4.5 V/1 V, VS = 1 V/4.5 V; Test Circuit 2 VD = 4.5 V/1 V, VS = 1 V/4.5 V; Test Circuit 3 VD = VS = 1 V/4.5 V, Test Circuit 4 0.75 ± 0.3 ±1 ±1 2.4 0.8 0.005 ± 0.1 3 0.4 4 20 32 10 17 9 1 ±3 –55 –75 –55 –75 VIN = VINL or VINH ISINK = 6 mA Channel-to-Channel Crosstalk RL = 300 Ω, CL = 35 pF, Test Circuit 5; VS1 = 3 V RL = 300 Ω, CL = 35 pF, Test Circuit 5; VS1 = 3 V RL = 300 Ω, CL = 35 pF; VS1 = VS8 = 3 V, Test Circuit 5 VS = 2.5 V, RS = 0 Ω, CL = 1 nF; Test Circuit 6 RL = 50 Ω, CL = 5 pF, f = 10 MHz; RL = 50 Ω, CL = 5 pF, f = 1 MHz; Test Circuit 8 RL = 50 Ω, CL = 5 pF, f = 10 MHz; RL = 50 Ω, CL = 5 pF, f = 1 MHz; Test Circuit 7 RL = 50 Ω, CL = 5 pF, Test Circuit 8 –3 dB Bandwidth ADG738 ADG739 CS (OFF) CD (OFF) ADG738 ADG739 CD, CS (ON) ADG738 ADG739 POWER REQUIREMENTS IDD 65 100 13 85 42 96 48 10 20 MHz typ MHz typ pF typ pF typ pF typ pF typ pF typ µA typ µA max VDD = 5.5 V Digital Inputs = 0 V or 5.5 V NOTES 1 Temperature range is as follows: B Version: –40 °C to +85°C. 2 Guaranteed by design, not subject to production test. Specifications subject to change without notice. –2– REV. 0 ADG738/ADG739 SPECIFICATIONS1 (V Param.


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