元器件交易网www.cecb2b.comDG485Vishay SiliconixOctal Analog Switch ArrayFEATURESDDDDDDLow On-Resistance: 55 WRail-to-Rail Analog Input RangeSerial InterfaceLow-Power—PD: 35 nWTTL and CMOS CompatibleAny Combination of 8 SPST to theOutputDHigh Speed—tON: 170 nsBENEFITSDLow Signal DistortionDDevices Can Be Chained for SystemExpansionDReduced Board SpaceDReduced Switch ErrorsDReduced Power SupplyRequirementsDSimple InterfacingAPPLICATIONSDAudio Switching and RoutingDAudio TeleconferencingDData Acquisition and IndustrialProcess ControlDBattery Powered Remote SystemsDAutomotive, Avionics and ATESystemsDSumming AmplifiersDESCRIPTIONThe DG485 is an analog switch array consisting of eight SPSTswitches connected to a common output. This device may beused as an 8-channel multiplexer in serial control applications.Any, all or none of the eight switches may be closed at anygiven time. Combining low on-resistance (rDS(on) 55 W, typ.)and fast switching (tON: 170ns, typ.), the DG485 is ideallysuited for data acquisition, process control, communication,and avionic applications.serial output (DOUT) allow daisy chaining of multiple arrays forlarge systems.Built on the Vishay Siliconix high voltage silicon gate processthe DG485 has a wide 44-V power supply voltage rating. Anepitaxial layer prevents latchup.Control data is input serially into the shift register with eachclock pulse. The shift register contents can be latched-in (viaLD) at any point into an octal latch which in turn controls allswitches. RS resets the shift register, forcing all latch inputs toa low condition (all switches off). The serial input (DIN) andEach channel conducts equally well in either direction when onand blocks up to rail-to-rail voltages when off.For additional information please refer to application noteAN204.FUNCTIONALBLOCKDIAGRAMANDPINCONFIGURATIONDual-In-LineLDVLS4S3S2S1V+DINCLKRSGNDDS5S6S7S8V–DOUTS4S3S2S1V+45678Shift Register/Latches9DIN10111213CLKDOUTNCV–PLCC and LCCGNDVLNC1RSLD21234567Shift RegisterLatches181716151413121110320191817161514DS5S6S7S8Top ViewTop ViewDocument Number: 70065S-52433—Rev. E, 06-Sep-99www.vishay.com S FaxBack 408-970-56005-1元器件交易网www.cecb2b.comDG485Vishay SiliconixTRUTHTABLESANDORDERINGINFORMATIONTRUTHTABLEĊDUALĆINĆLINEPACKAGERS1110XTRUTHTABLEĊPLCC&LCCPACKAGESLD*Dn01Dn*LD Input Level TriggeredCLK*DIN01XXD101D10DnDn-1Dn-1Dn (No Change)0Ln01LnSWnOFFON(No Change)*CLK Input Edge TriggeredORDERINGINFORMATIONTemp Range–40 to 85_C–55 to 125_CPackage18-Pin Plastic DIP20-Pin PLCCLCC-20Part NumberDG485DJDG485DNDG485AZ/883ABSOLUTEMAXIMUMRATINGSVoltages Referenced to V–V+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 VGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 VDigital Inputsa VS, VD. . . . . . . . . . . . . . . . . . . . . . . . . . (V–) –2 V to (V+) + 2 V or 30 mA, whichever occurs firstContinuous Current (Any Terminal). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mACurrent, S or D (Pulsed 1 ms, 10% duty cycle). . . . . . . . . . . . . . . . . . 100 mAStorage Temperature(AZ Suffix). . . . . . . . . . . . . . . . . . –65 to 150_C(DJ, DN Suffix). . . . . . . . . . . . . . –65 to 125_CPower Dissipation (Package)b18-Pin Plastic DIPc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470 mW20-Pin PLCC, LCCd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 mWNotes:a.Signals on SX, DX or INX exceeding V+ or V– will be clamped by internaldiodes. Limit forward diode current to maximum current ratings.b.All leads soldered or welded to PC board.c.Derate 6 mW/_C above 75_C.d.Derate 10 mW/_C above 75_C.www.vishay.com S FaxBack 408-970-56005-2Document Number: 70065S-52433—Rev. E, 06-Sep-99元器件交易网www.cecb2b.comDG485Vishay SiliconixSPECIFICATIONSaTest ConditionsUnless Otherwise SpecifiedParameterAnalog SwitchAnalog Signal RangeeDrain-SourceOn-ResistanceDelta Drain-SourceOn-ResistancegSwitch OffLeakage CurrentLkCtVANALOGrDS(on)DrDS(on)IS(off)ID(off)V+ = 13.5 V, V– = –13.5 VIS = –5 mA, VD = \"10 VFullRoomFullRoomRoomFullRoomFullRoomFullRoom5560.010.10.110.2–1–20–10–200–20–5001201020020500–1–10–10–50–20–5011010502050–151585125–151585125VW%A Suffix–55 to 125_CD Suffix–40 to 85_CSymbolV+ = 15 V, V– = –15 VVL = 5 V, VIN = 2.4 V, 0.8 VfTempbTypcMindMaxdMindMaxdUnit,V+ = 16.5 V, V– = –16.5 VVD = #1515.5 V, V5VVS = \"15.5 V155VV\" = \"16.5 V VS = VD = \"15.5 VOne Switch At A TimeV\" = \"16.5 V, VS = VD = \"15.5 VAll Switches OnnAAChannel OnLkLeakage CurrentCtID(on)InputInput Currentwith VIN LowInput Currentwith VIN HighIILIIHVIN Under Test = 0.8 VAll Other = 2.4 VVIN Under Test = 2.4 VAll Other = 0.8 VRoomFullRoomFull–0.00010.0001–1–5–1–51515–1–5–1–51515mASerial Data OutputOutput Voltagewith VIN Low – DOUTOutput Voltagewith VIN High – DOUTVOLVOHIO = 1.6 mA, V+ = 4.5 VIO = –80 mA, V+ = 16.5 VVL = 4.75 VFullFull0.2.42.70.42.70.4VDynamic CharacteristicsTurn-On TimeTurn-Off TimeData Setup TimeData Hold TimeLOAD Hold TimeRESET Hold TimeRESET \" to CLOCK \"DelayCharge InjectionOff IsolationeMaximumClock FrequencytONtOFFtDSSee Figures 4, 8tDHtLHtRHtDRCQOIRRfCLKVS = 0 V, CL = 1,000 pFAny One ChannelRL = 50 W, CL = 5 pF, f = 1 MHz See Figure 9VS = \"10 VSee Figures 1, 8VS = \"10 VSee Figures 2, 3, 8RoomFullRoomFullRoomFullRoomFullRoomFull17015040604060100150100150406017–75102002752002706040601001501001504060200275200276nsSFiSee Figures 5, 858RoomFullRoomFullRoomRoomRoompCdBMHzDocument Number: 70065S-52433—Rev. E, 06-Sep-99www.vishay.com S FaxBack 408-970-56005-3元器件交易网www.cecb2b.comDG485Vishay SiliconixSPECIFICATIONSaTest ConditionsUnless Otherwise SpecifiedParameterSymbolV+ = 15 V, V– = –15 VVL = 5 V, VIN = 2.4 V, 0.8 VfA Suffix–55 to 125_CD Suffix–40 to 85_CTempbTypcMindMaxdMindMaxdUnitDynamic Characteristics (Cont’d)Source OffCapacitanceeDrain Off CapacitanceeCS(off)CD(off)Vgen = 0 V, Rgen = 0 W, f = 1 MHz OneChannel OnVgen = 0 V, R,gen = 0 W,f = 1 MHzRoomRoomRoomRoom74353122FpFOn-State CapacitanceeCD(on)Vgen = 0 V, Rgen = 0 W, f = 1 MHz All Chan-nels OnPower SuppliesPositive SupplyCurrentNegative SupplyCurrentLogic Supply CurrentGround CurrentI+I–ILIGNDV+ = 16.5 V, V– = –16.5 VV165VV165VVIN = 0 or 5 V, VL = 5.25 VDOUT OpenRoomFullRoomFullRoomFullRoomFull0.001–0.0010.001–0.001–3–10–3–10310–3–10310–3–10310310mANotes:a.Refer to PROCESS OPTION FLOWCHART.b.Room = 25_C, Full = as determined by the operating temperature suffix.c.Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.d.The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.e.Guaranteed by design, not subject to production test.f.VIN = input voltage to perform proper function.rDS(on)MAX–rDS(on)MINg.ForeachV:Dr+DDS(on)rAVEǒDS(on)ǓTYPICALCHARACTERISTICS(25_CUNLESSNOTED)1 mA100 nA10 nAGNDSupply Currents vs. TemperaturerDS(on)– Drain-Source On-Resistance (W)V+ = 15 VV– = –15 VVL = 5 V160140120100806040200–20rDS(on) vs. VD and Power Supply VoltageVL = 5 VIS = –5 mAIPOS1 nA100 pA10 pA1 pA0.1 pA–50–30–101030507090IGNDINEGIL\"5 VI+, I–, I\"8 V\"10 V\"12 V\"15 V\"20 V110130–15–10–505101520Temperature (_C)www.vishay.com S FaxBack 408-970-5600VD – Drain Voltage (V)Document Number: 70065S-52433—Rev. E, 06-Sep-995-4元器件交易网www.cecb2b.comDG485Vishay SiliconixTYPICALCHARACTERISTICS(25_CUNLESSNOTED)400rDS(on)– Drain-Source On-Resistance (W)35030025020015010050002468101214161820VD – Drain Voltage (V)8 V10 V12 V15 V20 VV+ = 5 VrDS(on) vs. VD and Unipolar Power Supply VoltagerDS(on)– Drain-Source On-Resistance (W)V– = 0 VVL = 5 VIS = –5 mA1009080706050403020100–15rDS(on) vs. VD and Temperature125_C25_CV+ = 15 VV– = –15 VVL = 5 VIS = –5 mA–55_C–10–5051015VD – Drain Voltage (V)Channel On/Off Leakage Currentsvs. Analog Voltage604020ID, IS0–20–40–60–80–15–10–5051015VD or VS – Drain or Source Voltage (V)ID(off)ID(on)IS(off)V+ = 15 VV– = –15 V VL = 5 V1 mA100 nA10 nA1 nA100 pA10 pA1 pA0.1 pA0.01 pA–50–30Channel On/Off Leakage Currentsvs. TemperatureV+ = 15 VV– = –15 V VL = 5 VVS or VD = – 14 VIS, ID, IS + D(pA)ID(on)IS(off)ID(off)–101030507090110130Temperature (_C)3.02.55 VSwitching Thresholdvs. Power Supply Voltage and VL–140–120RF Characteristics6 V2.0VTH(V)VL = 7 V–100OIRR–80(dB)XTALK1. V1.0–60–40V+ = 15 VV– = –15 V VL = 5 VSee Figures 9, 100.5–2005671011121314151 k10 k100 kf – Frequency (Hz)www.vishay.com S FaxBack 408-970-56001 M10 MV+ Supply (V)0Document Number: 70065S-52433—Rev. E, 06-Sep-995-5元器件交易网www.cecb2b.comDG485Vishay SiliconixTYPICALCHARACTERISTICS(25_CUNLESSNOTED)Supply Currents vs. Switching Frequency10 mAV+ = 15 VV– = –15 V VL = 5 VVIN = 3 VInILCS, D(pF)Source/Drain On Capacitance vs. Analog Voltage180160140120100806040CD(on)(Channel 1 On Only)–15–10–5051015V+ = 15 VV– = –15 V VL = 5 VCD(on)(All Channels On)1 mA100 mAI+, I–, IGND10 mAIp1 mA100 nA10 nA1001 k10 kf – Frequency (Hz)100 k1 MVANALOG – Analog Voltage (V)Source/Drain Off Capacitancevs. Analog Voltage706050CS, D(pF)403020100–15–10–5051015CS(off)V+ = 15 VV– = –15 V VL = 5 VCD(off)Q (pC)55Charge Injection vs. Analog VoltageV+ = 15 VV– = –15 V VL = 5 VCL = 1 nF453525155–5–15–10–5051015VANALOG – Analog Voltage (V)VS – Source Voltage (V)TIMINGDIAGRAMS3 VLDVD0 VVS0 VtON50%90%Repeat for All ChannelsVDLD3 V0 VVS0 VtOFF50%90%Repeat for All ChannelsFIGURE 1. tON from LD3 V50%RS0 VVSVD0 VtOFF90%FIGURE 2. tOFF from LDFIGURE 3. tOFF from RSwww.vishay.com S FaxBack 408-970-5600Document Number: 70065S-52433—Rev. E, 06-Sep-995-6元器件交易网www.cecb2b.comDG485Vishay SiliconixTIMINGDIAGRAMSCLOCK50%DATA50%tDHtDSFIGURE 4. Data Setup and Hold TimeCLOCKRSLOADtLHtRHtDRCFIGURE 5. Timing RelationshipsRSDINCLKLDS1S2S3S4S5S6S7S8DOUTS1 – S8 and DOUT are expected output with the drain connected high. The sources require pull-down of 1 kW.FIGURE 6.Document Number: 70065S-52433—Rev. E, 06-Sep-99www.vishay.com S FaxBack 408-970-56005-7元器件交易网www.cecb2b.comDG485Vishay SiliconixSCHEMATICDIAGRAM(TYPICALCHANNEL)V+VLV+RSRSD1S8DINDnShiftRegisterCLKCLKD8LDV+DOctalLatchLevelShift/DriveV–S1DOUTV+LDGNDV–FIGURE 7.www.vishay.com S FaxBack 408-970-56005-8Document Number: 70065S-52433—Rev. E, 06-Sep-99元器件交易网www.cecb2b.comDG485Vishay SiliconixTESTCIRCUITS+15 V+5 V50 WS1VSV+S1S2VL50 WD35 pFS7S8CLKLDDINRSV–GND1 kWVO50 WS2D50 WDG485S350 WDG485S850 W–15 VFIGURE 8. Switching Time Test CircuitFIGURE 9. Adjacent Input CrosstalkTESTCIRCUITS50 WS150 WDG485S250 WVO50 WS850 WFIGURE 10. Off IsolationDocument Number: 70065S-52433—Rev. E, 06-Sep-99www.vishay.com S FaxBack 408-970-56005-9元器件交易网www.cecb2b.comDG485Vishay SiliconixAPPLICATIONSCLKfLDtLOGICtLOGICf= for CLK and LD inputs of the same frequency.The recommended phase delay of LD from CLK is½tLOGIC to tLOGIC:tLOGIC(MIN):80 ns at 25_C150 ns at 125_CV+ = 15 VV– = –15 VGND = 0 VFIGURE 11. DG485C1VREFC2R1DINDG485IN1RINR2CLKRFIN2RINR0R1R2R7–VOUT–++FIGURE 12. Multi-Function Circuit Provides Input Selection, Gain Ranging and Filtering with One DG485FIGURE 13. Serial DAC Circuitwww.vishay.com S FaxBack 408-970-56005-10Document Number: 70065S-52433—Rev. E, 06-Sep-99元器件交易网www.cecb2b.comDG485Vishay SiliconixAPPLICATIONSRFR–R+V1V2VOUTCH+–V8RDG485DG485FIGURE 14. Summing Node MixerFIGURE 15. Multiplexing, Sampling ApplicationS1S2S8DG485Switch ArrayD8085Octal LatchSODDINS/RDOUTTo NextSwitchArrayALEData Bus8212LDCLKRS(8)(8)Address BusDecoder8205WRR/SFIGURE 16. Direct Serial Interface (8085)Document Number: 70065S-52433—Rev. E, 06-Sep-99www.vishay.com S FaxBack 408-970-56005-11元器件交易网www.cecb2b.com
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