DG458/459 Vishay Siliconix Fault-Protected Single 8-Ch/Differential 4-Ch Analog Multiplexers Fault and Overvoltage Protection All Channels Off When Power Off Latchup-Proof Fast Switching—TA: 200 ns Break-Before-Make Switching Low On-Resistance: 180 Low Power Consumption: 3 mW TTL and CMOS Compatible Inputs Improved Ruggedness Power Loss Protection Prevents Adjacent Channel Crosstalk Standard Logic Interface Superior Accuracy Fast Settling Time Data Acquisition Systems Industrial Process Control Systems Avionics Test Equipment High-Rel Control Systems Telemetry The DG458 and DG459 are 8-channel single-ended and 4-channel differential analog multiplexers, respectively, incorporating fault protection. A series n-p-n MOSFET structure provides device and signal-source protection in the event of power loss or overvoltages. Under fault conditions the multiplexer input (or output) appears as an open circuit and only a few nanoamperes of leakage current will flow. This protects not only the multiplexer and the circuitry following it, but also protects the sensors or signal sources which drive the multiplexer. The DG458 and DG459 can withstand continuous overvoltage inputs up to 35 V. All digital inputs have TTL compatible logic thresholds. Break-before-make operation prevents channelto-channel interference. The DG458 and DG459 are improved pin-compatible replacements for HI-508A/509A and MAX358/359 multiplexers. DG458 DG459 Dual-In-Line Dual-In-Line A0 EN V– S1 S2 S3 S4 D 16 1 2 Decoders/Drivers 15 3 14 4 13 5 12 6 11 7 10 8 9 Top View Document Number: 70064 S-52433—Rev. F, 06-Sep-99 A1 A0 A2 EN GND V– V+ S1a S5 S2a S6 S3a S7 S4a S8 Da 16 1 2 Decoders/Drivers 15 3 14 4 13 5 12 6 11 7 10 8 9 A1 GND V+ S1b S2b S3b S4b Db Top View www.vishay.com FaxBack 408-970-5600 5-1 DG458/459 Vishay Siliconix TRUTH TABLES AND ORDERING INFORMATION TRUTH TABLE Ċ DG458 TRUTH TABLE Ċ DG459 A2 A1 A0 EN On Switch A1 A0 EN On Switch X X X 0 None X X 0 None 0 0 0 1 1 0 0 1 1 0 0 1 1 2 0 1 1 2 0 1 0 1 3 1 0 1 3 0 1 1 1 4 1 1 1 4 1 0 0 1 5 1 0 1 1 6 1 1 0 1 7 1 1 1 1 8 Logic “0” = VAL v 0.8 V Logic “1” = VAH w 2.4 V X = Don’t Care ORDERING INFORMATION Temp Range Package –40 to 85_C 16-Pin Plastic DIP Part Number DG458DJ DG459DJ DG458AK/883 16-Pin CerDIP DG459AK/883 –55 55 to 125 125_C C DG458AZ/883 LCC-20 DG459AZ/883 *Block Diagram and Pin Configuration not shown. ABSOLUTE MAXIMUM RATINGS V+ to V– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 V V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 V V– to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25 V VEN, VA Digital Input . . . . . . . . . . . . . . . . . . . . . . . . . . . (V–) –4 V to (V+) +4 V VS, Analog Input Overvoltage with Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (V–) –20 V to (V+) +20 V VS, Analog Input Overvoltage with Power Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –35 V to +35 V Continuous Current, S or D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Peak Current, S or D (Pulsed at 1 ms, 10% Duty Cycle Max) . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA www.vishay.com S FaxBack 408-970-5600 5-2 Storage Temperature (AK Suffix) . . . . . . . . . . . . . . . . . . –65 to 150_C (DJ Suffix) . . . . . . . . . . . . . . . . . . –65 to 125_C Power Dissipation (Package)a 16-Pin Plastic DIPb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 mW 16-Pin CerDIPc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 mW LCC-20d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 mW Notes: a. All leads soldered or welded to PC board. b. Derate 6.3 mW/_C above 25_C. c. Derate 12 mW/_C above 75_C. d. Derate 10 mW/_C above 75_C. Document Number: 70064 S-52433—Rev. F, 06-Sep-99 DG458/459 Vishay Siliconix Test Conditions Unless Otherwise Specified A Suffix D Suffix –55 to 125_C –40 to 85_C V+ = 15 V, V– = –15 V VAL = 0.8 V, VAH = 2.4 Vf Tempb VANALOG Full VD = "9.5 V, IS = –400 mA 0.45 rDS(on) Room Full 1.2 1.5 VD = "5 V, IS = –400 mA Room 180 400 400 W DrDS(on) VD = 0 V, IS = –400 mA Room 6 IS(off) VEN = 0 V VS = "10 V, VD = #10 V Room Full 0.03 –0.5 –50 0.5 50 –1 –20 1 20 DG458 ID(off) VEN = 0 V VD = "10 V VS = #10 V Room Full 0.1 Drain Off L k Leakage Current C t –1 –200 1 200 –1 –50 1 50 DG459 Room Full 0.1 –1 –100 1 100 –2 –25 2 25 Differential Off Drain Leakage Current IDIFF –50 50 –20 20 Drain On Leakage Current L k C t ID(on) Parameter Symbol Typc Mind Maxd Mind Maxd Unit 10 V 1.5 1.8 kW Analog Switch Analog Signal Rangeg Drain-Source On-Resistance rDS(on) Matching Between Channelsh Source Off Leakage Current DG459 Only –10 Room 10 –10 % DG458 Room Full 0.1 –2 –200 2 200 –5 –50 5 50 DG459 Room Full 0.05 –2 –100 2 100 –5 –25 5 25 VS = "33 V, VD = 0 V See Figure 2 Room 0.02 VS = "25 V, VD = "10 V, See Figure 2 Room 0.005 –5 5 –10 10 VS = "25 V, VSUPS = 0 V VD = A0, A1, A2, EN = 0 V Room 0.001 –2 2 –5 5 VS = VD = "10 V A nA Fault Output Leakage Current (with Overvoltage) Input Leakage Current (with Overvoltage) Input Leakage Current (with Power Supplies Off) ID(off) IS(off) nA mA Digital Control Input Low Threshold VAL Full Input Low Threshold VAL Full 2.4 –1 Logic Input Control IA VA = 2.4 V or 0.8 V Full 0.8 0.8 2.4 1 –1 1 V mA Dynamic Characteristics Transition Time tA See Figure 3 Room 200 Break-Before-Make Time tOPEN See Figure 4 Room 45 Enable Turn-On Time tON(EN) Room Full 140 250 500 250 500 Room Full 50 250 500 250 500 See Figure 5 Enable Turn-Off Time tOFF(EN) To 0.1 % Room 0.5 To 0.01% Room 1.5 OIRR VEN = 0 V, RL = 1 kW , CL = 15 pF VS = 3 VRMS, f = 100 kHz Room 90 Logic Input Capacitance Cin f = 1 MHz Room 5 Source Off Capacitance CS(off) Settling Time ts Off Isolation Drain Off Capacitance CD(off) Drain On Capacitance CD(on) Document Number: 70064 S-52433—Rev. F, 06-Sep-99 Room 5 DG458 Room 15 DG459 Room 10 DG458 Room 40 DG459 Room 35 500 10 500 10 ns ms dB pF F www.vishay.com S FaxBack 408-970-5600 5-3 DG458/459 Vishay Siliconix SPECIFICATIONSa Test Conditions Unless Otherwise Specified Parameter V+ = 15 V, V– = –15 V VAL = 0.8 V, VAH = 2.4 Vf Symbol Tempb Typc Room Full 0.05 Room Full –0.01 A Suffix D Suffix –55 to 125_C –40 to 85_C Mind Maxd Mind Maxd Unit Power Supplies Positive Supply Current I+ Negative Supply Current I– VEN = 5.0 or 0 V, VA = 0 V Power Supply Range for Continuous Operation Room 0.1 0.2 –0.1 –0.2 0.1 0.2 mA –0.1 –0.2 "4.5 "18 "4.5 "18 V Notes: 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. g. When the analog signal exceeds the +13.5 V or –12 V, rDS(on) starts to rise until only leakage currents flow. r DS(on) MAX – r DS(on) MIN h. Dr + x 100% DS(on) r AVE ǒ Ǔ DS(on) TYPICAL CHARACTERISTICS (25_C UNLESS NOTED) Input Leakage vs. Input Voltage Off-Channel Leakage Currents vs. Input Voltage 1 mA 1 mA 10 mA 10 mA 1 mA 1 mA 100 nA 10 nA Operating Range 1 nA 10 nA Operating Range 1 nA 100 pA 10 pA 10 pA 0 10 20 VS – Source Voltage (V) www.vishay.com S FaxBack 408-970-5600 5-4 100 nA 100 pA 1 pA –50 –40 –30 –20 –10 30 V+ = 15 V V– = –15 V 100 mA V+ = V– = 0 V I S –Source Current I S –Source Current 100 mA 40 50 1 pA –50 –40 –30 –20 –10 0 10 20 30 40 50 VS – Source Voltage (V) Document Number: 70064 S-52433—Rev. F, 06-Sep-99 DG458/459 Vishay Siliconix _ Output Leakage vs. Off-Channel Overvoltage rDS(on) vs. Input Voltage 1 nA r DS(on)– Drain-Source On-Resistance ( ) 2000 V+ = 15 V V– = –15 V I D – Drain Current 100 pA 10 pA 1 pA 0.1 pA –50 –40 –30 –20 –10 0 10 20 30 40 1600 5 V Supplies 1200 10 V 800 15 V 400 20 V 0 –20 50 –15 –10 VS – Source Voltage (V) 15 20 25 12 15 Leakage Current vs. VS, VD V+ = 15 V V– = –15 V V+ = 15 V V– = –15 V 20 IS(off) 15 500 25_C 400 85_C 125_C 0_C 300 200 10 ID(off) 5 0 –5 ID(on) –10 –15 100 –55_C –20 0 –25 –10 –7.5 –5.0 –2.5 0 2.5 5.0 7.5 10 –15 –12 –9 –6 –3 0 3 6 9 VD – Drain Voltage (V) VD or VS – Drain or Source Voltage (V) Leakage Currents vs. Temperature Switching Times (tTRANS, tON, tOFF) vs. VSUPPLIES 240 10 V+ = 15 V V– = –15 V VS, VD = 10 V tTRANS ID(on) 200 1 Time (ns) I S, I D (nA) 10 25 I S, I D – Leakage (pA) r DS(on)– Drain-Source On-Resistance ( ) 600 5 VS – Source Voltage (V) rDS(on) vs. VD and Temperature 700 0 –5 ID(off) IS(off) 160 tON(EN) 120 VIN = 2 V 0.10 80 tOFF(EN) 40 0.01 –55 –35 –15 5 25 45 65 Temperature (_C) Document Number: 70064 S-52433—Rev. F, 06-Sep-99 85 105 125 5 10 15 20 V+, V– Positive and Negative Supplies (V) www.vishay.com S FaxBack 408-970-5600 5-5 DG458/459 Vishay Siliconix TYPICAL CHARACTERISTICS (25_C UNLESS NOTED) Switching Times vs. Temperature QINJ vs. VS 280 0 V+ = 15 V V– = –15 V 240 Charge Injection (pC) tTRANS 200 Time (ns) V+ = 15 V V– = –15 V –10 tON(EN) 160 120 tOPEN 80 –30 CL = 1 nF –40 –50 tOFF(EN) 40 –20 0 CL = 10 nF –60 –55 –35 –15 5 25 45 65 85 105 –10 125 –5 Temperature (_C) 10 Logic Input Switching Threshold vs. VSUPPLIES 3.0 V+ = 15 V V– = –15 V RL = 1 k –100 2.5 2.0 V TH (V) –90 (dB) 5 VS – Source Voltage (V) Off Isolation and XTALK vs. Frequency –110 0 –80 Off Isolation Crosstalk –70 1.5 1.0 –60 0.5 –50 0 10 k 100 k 1M 10 M 2.5 5 7.5 10 f – Frequency (Hz) 12.5 15 17.5 20 V+, Supply (V) SCHEMATIC DIAGRAM (TYPICAL CHANNEL) V+ GND V– VREF D V+ A0 V– V+ Level Shift AX Decode/ Drive S1 V– V+ EN Sn V– FIGURE 1. www.vishay.com S FaxBack 408-970-5600 5-6 Document Number: 70064 S-52433—Rev. F, 06-Sep-99 DG458/459 Vishay Siliconix +15 V V+ IS(off) "VS ID(off) Sn A D A VD V– –15 V FIGURE 2. Analog Input Overvoltage +15 V +2.4 V V+ EN S1b 50% * A2 A1 3V Logic Input "5 V DG458 0V S8b A0 #5 V Db GND VO +5 V Switch Output VO V– 50 1 M 90% –5 V 35 pF tA –15 V * = S1a – S8a, S2b – S7b, Da FIGURE 3. Transition Time +15 V +2.4 V EN V+ S1 , S8 Logic Input +5 V 3V 0V S2 – S7 A0 DG458 A1 A2 Db, D GND 50 VO V– –15 V Switch Output 50% VO 1 k 35 pF 0V tOPEN FIGURE 4. Break-Before-Make Time Document Number: 70064 S-52433—Rev. F, 06-Sep-99 www.vishay.com FaxBack 408-970-5600 5-7 DG458/459 Vishay Siliconix +15 V V+ S1 3V Enable Input +5 V EN 50% 0V S2 – S8 A0 VS DG458 A1 A2 GND V– 50 Switch Output D 1 k VO 90% VO 0V tON(EN) 35 pF tOFF(EN –15 V FIGURE 5. Enable Delay The Vishay Siliconix DG458 and DG459 multiplexers are fully fault- and overvoltage-protected for continuous input voltages up to 35 V whether or not voltage is applied to the power supply pins (V+, V–). These multiplexers are built on a high-voltage junction-isolated silicon-gate CMOS process. Two n-channel and one p-channel MOSFETs are connected in series to form each channel (Figure 1). –35 V Overvoltage n-Channel MOSFET is On Q1 –35 V S D G Q2 S D G Q3 S D +35 V Overvoltage n-Channel MOSFET is Off G p-Channel MOSFET is Off Within the normal analog signal range (10 V), the rDS(on) variation as a function of analog signal voltage is comparable to that of the classic parallel N-MOS and P-MOS switches. (a) Overvoltage with Multiplexer Power Off –15 V When the analog signal approaches or exceeds either supply rail, even for an on-channel, one of the three series MOSFETs gets cut-off, providing inherent protection against overvoltages even if the multiplexer power supply voltages are lost. This protection is good up to the breakdown voltage of the respective series MOSFETs. Under fault conditions only sub microamp leakage currents can flow in or out of the multiplexer. This not only provides protection for the multiplexer and succeeding circuitry, but it allows normal, undisturbed operation of all other channels. Additionally, in case of power loss to the multiplexer, the loading caused on the transducers and signal sources is insignificant, therefore redundant multiplexers can be used on critical applications such as telemetry and avionics. www.vishay.com FaxBack 408-970-5600 5-8 Q1 –35 V Overvoltage n-Channel MOSFET is On +15 V –15 V Q2 +15 V –15 V Q3 +35 V Overvoltage n-Channel MOSFET is Off p-Channel MOSFET is Off (b) Overvoltage with Multiplexer Power On FIGURE 6. Overvoltage Protection Document Number: 70064 S-52433—Rev. F, 06-Sep-99