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| DG308A/DG309 Vishay Siliconix Quad Monolithic SPST CMOS Analog Switches FEATURES D D D D D "15-V Analog Input Range Low On-Resistance: 60 W Fast Switching: 130 ns Low Power Dissipation: 30 nW CMOS Logic Compatible BENEFITS D D D D D D Full Rail-to-Rail Analog Signal Range Low Signal Error Wide Dynamic Range Single or Dual Supply Capability Static Protected Logic Inputs Space Savings (TSSOP) APPLICATIONS D Portable and Battery Powered Instrumentation D Communication Systems D Computer Peripherals D High-Speed Multiplexing DESCRIPTION Featuring low on-resistance (60 W) and fast switching (130 ns), the DG308A is supplied in the "normally open" configuration while DG309 is supplied "normally closed." Input thresholds are high voltage CMOS compatible. Designed with the Vishay Siliconix PLUS-40 CMOS process to combine low power dissipation with a high breakdown voltage rating of 44 V, each switch conducts equally well in both directions when on, and blocks up to the supply voltage when off. An epitaxial layer prevents latch up. The DG308B/309B upgrades are recommended for new designs. FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION DG308A IN1 D1 S1 V- GND S4 D4 IN4 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 IN2 D2 S2 V+ NC S3 D3 IN3 Four SPST Switches per Package TRUTH TABLE Logic 0 1 DG308A OFF ON Logic "0" v 3.5 V Logic "1" w 11 V DG309 ON OFF Top View Document Number: 70046 S-52882--Rev. E, 28-Apr-97 www.vishay.com S FaxBack 408-970-5600 4-1 DG308A/DG309 Vishay Siliconix ORDERING INFORMATION Temp Range 0 to 70_C Package 16-Pin Plastic DIP Part Number DG308ACJ DG309CJ DG308ADY 16-Pin Narrow SOIC DG309DY -40 to 85 C 40 85_C DG308ADQ 16-Pin TSSOP DG309DQ DG308AAK/883 -55 to 125_C 16-Pin CerDIP DG309AK/883 ABSOLUTE MAXIMUM RATINGS Voltages Referenced to V- V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 V GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 V Digital Inputsa, VS, VD . . . . . . . . . . . . . . . . . . . . . . . . . (V-) -2 V to (V+) +2V or 20 mA, whichever occurs first Current, Any Terminal Except S or D . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Continuous Current, S or D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA (Pulsed at 1 ms, 10% duty cycle max) . . . . . . . . . . . . . . . . . . . . . . . . . . 70 mA Storage Temperature (AK Suffix) . . . . . . . . . . . . . . . . . . -65 to 150_C (CJ, DY, and DQ Suffix) . . . . . . . -65 to 125_C Power Dissipationb 16-Pin Plastic DIPc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470 mW 16-Pin Narrow SOIC and TSSOPe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 mW 16-Pin Cerdipd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 mW Notes: a. Signals on SX, DX, or INX exceeding V+ or V- will be clamped by internal diodes. Limit forward diode current to maximum current ratings. b. All leads welded or soldered to PC Board. c. Derate 12 mW/_C above 75_C d. Derate 6.5 mW/_C above 25_C e. Derate 7.6 mW/_C above 75_C SCHEMATIC DIAGRAM (TYPICAL CHANNEL) V+ S V- VIN Level Shift/ Drive V+ GND D V- FIGURE 1. www.vishay.com S FaxBack 408-970-5600 4-2 Document Number: 70046 S-52882--Rev. E, 28-Apr-97 DG308A/DG309 Vishay Siliconix SPECIFICATIONSa Test Conditions Unless Otherwise Specified Parameter Analog Switch Analog Signal Rangee Drain-Source On-Resistance Source Off Leakage Current Drain Off Leakage Current Drain On Leakage Current VANALOG rDS(on) IS(off) ID(off) ID(on) VD = "10 V, IS = 1 mA VS = "14 V, VD = #14 V VD = "14 V, VS = #14 V VD = VS = "14 V Full Room Full Room Full Room Full Room Full 60 "0.1 "0.1 "0.1 -1 -100 -1 -100 -1 -100 -15 15 100 150 1 100 1 100 1 100 -5 -100 -5 -100 -5 -200 -15 15 100 125 5 100 5 100 5 200 nA A V W A Suffix -55 to 125_C C, D Suffix Mind Maxd Unit Symbol V+ = 15 V, V- = -15 V VIN = 3.5 V or 11 Vf Tempb Typc Mind Maxd Digital Control Input Current with Input Voltage High Input Current with Input Voltage Low Input Capacitance IINH IINL CIN VIN = 15 V VIN = 0 V Full Full Room 0.001 -0.001 8 -1 1 -1 pF 1 mA Dynamic Characteristics Turn-On Time Turn-Off Time Charge Injection Source-Off Capacitance Drain-Off Capacitance Channel-On Capacitance Off-Isolationf tON tOFF Q CS(off) CD(off) CD(on) OIRR RL = 75 , VS = 2 Vp-p, f = 500 kHz f = 140 kHz, VS, VD = 0 V kH CL = 0.01 mF, Rgen = 0 W, Vgen = 0 V Room See Figure 2 Room Room Room Room Room Room 90 -10 11 8 27 78 dB pF F 150 150 pC 130 200 200 ns Power Supplies Positive Supply Current Negative Supply Current I+ I- All Channels On or Off VIN = 0 V or 15 V Room Full Room Full 0.001 -0.001 -10 -100 10 100 -100 10 100 mA 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. Document Number: 70046 S-52882--Rev. E, 28-Apr-97 www.vishay.com S FaxBack 408-970-5600 4-3 DG308A/DG309 Vishay Siliconix TYPICAL CHARACTERISTICS (25_C UNLESS NOTED) rDS(on) vs. VD and Power Supply 250 r DS(on) Drain-Source On-Resistance ( W ) - 150 "5 V r DS(on) Drain-Source On-Resistance ( W ) - TA = 25_C V+ = +7.5 V 200 TA = 25_C V- = 0 V rDS(on) vs. VD and Power Supply Voltage 120 "7.5 V "10 V 60 "15 V "20 V 150 90 +10 V 100 +15 V 30 50 +20 V 0 -15 -10 -5 5 0 10 VD - Drain Voltage (V) 15 20 0 0 5 10 15 VD - Drain Voltage (V) 20 Leakage Currents vs. Analog Voltage 10 TA = 25_C 10 IS(off) 0 I S, I D (pA) ID(on) V T (V) ID(off) -10 6 8 Input Switching Threshold vs. V+ and V- Supply Voltages TA = 25_C 4 -20 2 -30 -15 -12 -9 -6 -3 0 3 69 12 VD or VS - Drain or Source Voltage (V) 15 0 0 "5 "10 "15 V+, V- Positive & Negative Supplies (V) "20 Supply Currents vs. Switching Frequency (All Inputs Active) 1000 "15 V Supplies TA = 25_C 800 6 600 V T (V) 5 4 3 I- 2 200 I+ 1 100 1k 10 k 100 k 1M 0 0 8 7 Input Switching Threshold vs. Positive Supply Voltage V- = 0 V TA = 25_C I+, I- ( mA) 400 5 10 15 f - Frequency (Hz) www.vishay.com S FaxBack 408-970-5600 V+ - Positive Supply Voltage (V) 4-4 Document Number: 70046 S-52882--Rev. E, 28-Apr-97 DG308A/DG309 Vishay Siliconix TEST CIRCUITS +15 V V+ VS = +3 V S IN 12 V GND V- RL 1 kW CL 35 pF Switch Output -15 V VO = VS RL RL + rDS(on) VO tON 90% D VO Logic Input 12 V 50% 0V tOFF tr <20 ns tf <20 ns FIGURE 2. Switching Time APPLICATIONS Single Supply Operation The DG308A and DG309 will switch positive analog signals while using a single positive supply. This will allow use in many applications where only one supply is available. The trade-offs or performance given up while using single supplies are: 1) increased rDS(on) and 2) slower switching speed. As stated in the absolute maximum ratings section of the data sheet, the analog voltage should not go above or below the supply voltages which in single supply operation are V+ and 0 V. Document Number: 70046 S-52882--Rev. E, 28-Apr-97 www.vishay.com S FaxBack 408-970-5600 4-5 |
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