PS398/PS399 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers Features Description • Low On-Resistance (60Ohm typ.) Minimizes Distortion and Error Voltages • Low Glitching Reduces Step Errors and Improves Settling Times. Charge Injection: <5pC • Split-Supply Operation (+3V to +8V) • Improved Second Sources for MAX398/MAX399 • On-Resistance Matching Between Channels: <6Ohm • On-Resistance Flatness: <11Ohm • Low Off-Channel Leakage, INO(OFF) < 1nA @ +85oC, ICOM(ON), <2.5nA @ +85oC • TTL/CMOS Logic Compatible • Fast Switching Speed, tTRANS <250ns • Break-Before-Make action eliminates momentary crosstalk • Rail-to-Rail Analog Signal Range • Low Power Consumption, <300µW • Narrow SOIC and QSOP Packages Minimize Board Area The PS398/PS399 are improved high precision analog multiplexers. The PS398, an 8-channel single-ended mux, selects one of eight inputs to a common output as determined by a 3-bit address A0-A2. An EN (enable) pin when low disables all switches, useful when stacking several devices. The PS399 is a 4-channel differential multiplexer. It selects one of four differential inputs to a common differential output as determined by a 2-bit address A0, A1. An EN pin may be driven low to disable all switches. These multiplexers operate with dual supplies from +3V to +8V. Single-supply operation is possible from +3V to +15V. With +5V power supplies, the PS398/PS399 guarantee <100Ohm on-resistance. On-resistance matching between channels is within 6Ohm. On-resistance flatness is less than 11Ohm over the specified signal range. Each switch conducts current equally well in either direction when on. In the off state each switch blocks voltages up to the powersupply rails. Both devices guarantee low leakage currents (<2.5nA at +85oC) and fast switching speeds (tTRANS <250ns). Break-before-make switching action protects against momentary crosstalk between channels. Applications • • • • • • Data Acquisition Systems Audio Switching and Routing Test Equipment PBX, PABX Telecommunication Systems Battery-Powered Systems Functional Block Diagrams and Pin Configurations Top View PS399 Top View PS398 A0 1 EN 2 V- 16 16 A1 AO 1 15 A2 EN 2 3 14 GND V- 3 NO1 4 13 V+ NO1A 4 13 NO1B NO2 5 12 NO5 NO2A 5 12 NO2B NO3 6 11 NO6 NO3A 6 11 NO3B NO4 7 10 NO7 NO4A 7 10 NO4B COM 8 Decoders/Drivers 9 COMA 8 NO8 1 Decoders/Drivers A1 15 GND 14 V+ 9 COMB PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Truth Tables PS398 PS399 A2 A1 A0 EN On Switch X X X 0 None 0 0 0 1 1 0 0 1 1 2 0 1 0 1 0 1 1 1 0 1 A1 A0 EN ON Switch X X 0 None 0 0 1 1 3 0 1 1 2 1 4 1 0 1 3 0 1 5 1 1 1 4 0 1 1 6 1 1 0 1 7 1 1 1 1 8 Logic “0”, VAL ≤ 0.8V Logic “1”, VAH ≥ 2.4V Absolute Maximum Ratings Thermal Information Voltages Referenced to V- Continuous Power Dissipation V+ ....................................................................... -0.3V to + 17V SOIC and QSOP (derate 8.7mW/ °C above +70°C) .......... 650mW GND .................................................................... -0.3V to + 17V Storage Temperature ........................................ –65°C to +150°C GND ........................................................... -0.3V to ( V+) + 0.3V Lead Temperature (soldering, 10s) .................................. +300°C VIN, VCOM, VNO (Note 1) ................... (V-) -2V to (V+) + 2V or 30mA, whichever occurs first Current (any terminal ) ......................................................... 30mA Peak Current, COM, NO, NC (pulsed at 1ms, 10% duty cycle) ..................................... 100mA ESD per method 3015.7 .................................................. > 2000V Note 1: Signals on NO, COM, or logic inputs exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to 30mA. Caution: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. 2 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Electrical Specifications - Dual Supplies (V± = ±5V ± 10%, GND = 0V, VAH = VENH = 2.4V, VAL = VENL = 0.8V) Parame te r Symbol Conditions Te mp. (°C) M in.(2) Full V- Typ.(1) M ax.(2) Units Analog Switch Analog Signal Range (3) VANALOG On Resistance RON On- Resistance Match Between Channels(4) ∆RON On- Resistance Flatness(5) RFLAT(ON) NO Off Leakage Current(6) COM- Off Leakage Current(6) V+ = 4.5V, V- = - 4.5V, VCOM = ±3.5V INO = 1mA, INO(OFF) ICOM(OFF) 25 VCOM or VNC = ±3.5V, INO = 1mA, V+ = 5V, V- = - 5V INO V+ = 5V, V- = - 5V, = 1mA, VCOM = ±3V, 0V V+ = 5.5V, V- = - 5.5V, VCOM = ±4.5V, VNO = ±4.5V V+ = 5.5V, V- = - 5.5V VCOM = ± 4.5V, VNO = - /+4.5V P S 398 P S 399 P S 398 COM On Leakage Current(7) ICOM(ON) V+ = 5.5V, V- = - 5.5V VCOM = ±4.5V VNO = 4.5V P S 399 V+ 60 V 100 Full 125 25 6 Full 8 25 11 Full 14 25 - 0.1 0.1 Full - 1.0 1.0 25 - 0.2 50 Full - 2.5 100 25 - 0.1 50 Full - 1.5 100 25 - 0.4 0.4 Full -5 5 25 - 0.2 0.2 Full - 2.5 2.5 Ohm nA Logic Input Logic High Input Voltage VAH, VENH Logic Low Input Voltage VAL, VENL 2.4 V 0.8 Full Input Current with Input Voltage High IAH, IENH Input Current with Input Voltage Low IAL, IENL VA = VEN = 2.4V - 0.1 0.1 µA VA = VEN = 0.8V 3 - 0.1 0.1 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Electrical Specifications - Dual Supplies (V± = ±5V ± 10%, GND = 0V, VAH = VENH = 2.4V, VAL = VENL = 0.8V) (continued) Parame te r Te mp(°C) M in.(1) Typ.(2) M ax.(1) Symbol Conditions Transition Time tTRANS Figure 1 Break- Before- Make Time Delay tOPEN Figure 3 Enable Turn- OnTime tON(EN) Figure 2 Enable Turn- Off Time tOFF(EN) Figure 2 Q CL= 1nF, VS = 0V, RS = 0Ohm, 2.8 OIRR VEN = 0V, RL= 1kOhm, f = 100kHz - 101 XTALK RL = 1kOhm, f = 100kHz, Figure 6 - 92 CIN f =1MHz 2.5 CNO(OFF) f =1MHz, VEN = VNO = 0V Units Dynamic Charge Injection(3) Off Isolation(7) Crosstalk Logic Input Capacitance NO Off Capacitance COM Off Capacitance COM On Capacitance CCOM(OFF) CCOM(ON) 150 0 25 40 72 Full 55 Full f =1MHz, VCOM = 0V ns 250 25 f =1MHz, VEN = VCOM =0V 150 150 200 25 5 pC dB 3.6 P S 398 31 P S 399 14 P S 398 35 P S 399 20 pF Supply Power- Supply Range Positive Supply Current NegativeSupply Current Ground Current I+ I- VEN = VA = 0V or V+, V+ =5.5V, V- = - 5.5V IGND Full ±3 ±8 -1 1 -1 1 -1 1 V µA Notes: 1. Algebraic convention, where the most negative value is a minimum and the most positive is a maximum, is used in this data sheet. 2. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing. 3. Guaranteed by design. 4. ∆RON = RON max - RON min. 5. Flatness is defined as the difference between the maximum and minimum values of on-resistance measured. 6. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25ºC. 7. Off Isolation = 20log10 VCOM / VNO. See Figure 5. 4 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Electrical Characteristics - Single 5V Supply (V+ = + 5V ± 10%, V- = 0V, GND = 0V, VAH = VENH = +2.4, VAL = VENL = +0.8V) Parame te r Symbol Te mp(°C) M in.(1) Conditions Typ.(2) M ax.(1) Units V+ V Switch Analog Signal Range(3) On Resistance VCOM, VNO RON Full INO = 1mA, VCOM = 3.5V, V+ = 4.5V RON Matching Between Channels(4) ∆RON INO = 1mA, VCOM = 3.5V, V+ = 4.5V On - Resistance Flatness RFLAT INO = 1mA, VCOM = 1.5V, 2.5V, 3.5V, V+ = 5V INO(OFF) VNO = 4.5V, VCOM = 0V, V+ = 5.5V NO- Off Leakage Current(8) COM- Off Leakage Current(8) COM- On Leakage Current(8) ICOM(OFF) ICOM(ON) VCOM = 4.5V, VNO =0V, V+ = 5.5V VCOM = 4.5V, VNO =4.5V, V+ = 5.5V P S 398 P S 399 P S 398 P S 399 0 25 100 225 Full 280 25 11 Full 13 25 18 Full 22 25 - 0.1 0.1 Full - 1.0 1.0 25 - 0.2 50 Full - 2.5 100 25 - 0.2 50 Full - 1.5 100 25 - 0.4 0.4 Full -5 5 25 - 0.2 0.2 Full - 2.5 2.5 Ohm nΑ Digital Logic Input Logic High Input Voltage VAH, VENH Logic Low Input Voltage VAH, VENL Input Current with Input Voltage High IAH, IENH Input Current with Input Voltage Low IAH, IENL 2.4 0.8 VA= VEN = 2.4V Full - 0.1 V 0.1 µA VA= VEN = 0.8V - 0.1 0.1 3 15 - 1.0 1.0 - 1.0 1.0 - 1.0 1.0 Supply Power- Supply Range V+ Positive- Supply Current I+ Negative- Supply Current I- Ground Current IGND VEN = V+ or 0V, VA = 0V, V+ = 5.5V, V- = 0V 5 Full PS8185E V µΑ 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Electrical Characteristics - Single 5V (V+ = +5V ± 10%, V- = 0V, GND = 0V, VAH = VENH = +2.4, VAL = VENL= +0.8V (continued) Parame te r Symbol Conditions Te mp(°C) M in.(1) Typ.(2) M ax.(1) 72 245 Units Dynamic Transition Time tTRANS Break- Before- Make Interval tOPEN Enable Turn- On Time tON(EN) Enable Turn- Off Time tOFF(EN) Charge Injection(3) Q VNO = 3V 10 25 36 110 200 Full 275 25 65 125 Full CL = 1nF, VS = 0V, RS = 0Ohm ns 200 25 2.8 5 pC Electrical Characteristics - Single 3V Supply (V+ = +3V ± 10%, V- = 0V, GND = 0V, VAH = VENH = +2.4, VAL = VENL = +0.8V) Parame te r Symbol Te mp.(°C) M in.(1) Conditions Typ.(2) M ax.(1) Units V+ V Switch Analog Signal Range(3) VANALOG Full RON INO = 1mA, VCOM = 1.5V, V+ = 3V Transition Time(3) tTRANS Figure 1, VIN = 2.4V VNO1 = 1.5V, VNO8 = 0V Enable Turn- OnTime(3) tON(EN) Figure 2, VINH = 2.4V VINL = 0V, VNO1 = 1.5V Enable Turn- Off Time(3) tOFF(EN) Q On- Resistance 25 0 160 Full 375 425 Ohm Dynamic Charge Injection (3) 200 575 200 500 Figure 2, VINH = 2.4V VINL = 0V, VNO1 = 1.5V 92 400 CL = 10nF, VS = 0V, RS = 0Ohm 2 5 25 ns pC Notes: 1. The algebraic convention, where the most negative value is a minimum and the most positive is a maximum, is used in this data sheet. 2. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing. 3. Guaranteed by design 4. ∆RΟΝ = RΟΝ max - RΟΝ min 5. Flatness is defined as the difference between the maximum and minimum value of on-resistance measured. 6. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25ºC. 7. Worst-case isolation is on channel 4 because of its proximity to the COM pin. Off isolation = 20log VCOM/VNO, VCOM = output, VNO = input to off switch 8. Leakage testing at single supply is guaranteed by testing with dual supplies. 6 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Test Circuits/Timing Diagrams +5V V+ A2 A1 A0 NO2-NO7 50Οηµ PS398 + 5V +5V NO1 EN NO8 -5V VOUT COM V300 Οηµ -5V GND 35pF Logic Input VEN V+ NO1A Switch Output VOUT +5V PS399 +5V EN NO4A 90% 0V 90% ttrans - 5V ttrans ON VOUT COM V300 Οηµ -5V GND 50% 0V VNO8 NO2A-NO4B 50Οηµ tr <20ns tf <20ns VNO1 +5V A1 A0 +3V 35pF Figure 1. Transition Time +5V V+ EN 50 Οηµ A2 A1 A0 NO1 NO2-NO8 PS398 GND +5V 50 Οηµ V+ A0 NO1A-NO4A, NO2B-NO4B, COMA NO1B PS399 GND VOUT COM V300 Οηµ -5V EN A1 +5V COMB V300 Οηµ -5V Logic Input VEN 35pF tr <20ns tf <20ns +3V 50% 0V tOFF(EN) tON(EN) 0V 90% Switch Output VOUT +5V 10% VOUT 35pF Figure 2. Enable Switching Time 7 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 +5V NO1-NO8 A2 A1 A0 +5V tr <20ns tf <20ns +3V 50% 0V +5V PS398 50Οηµ Switch Output VOUT VOUT COM V- GND VA Logic Input VA V+ +2.4V VEN EN 0V 35pF 300 Οηµ 80% tOPEN -5V Figure 3. Break-Before-Make Interval +5V RS VEN VS Channel Select V+ NO EN A0 A1 A2 Logic Input VEN PS398 VOUT COM CL=1000pF V- GND +3V 0FF 0FF ON 0VX C ∆V ∆ OUT VOUT -5V ∆VOUT ∆ IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER WHEN THE CHANNEL TURNS OFF. ∆VOUT x C ∆ L Figure 4. Charge Injection +5V 10nF V IN N01 V+ NO1 RS = 50 Οηµ +5V 10nF V IN N08 R = 1k Οηµ PS398 A0 A1 A2GND EN COM VOUT 50 RG=Οηµ RL=1kΟηµ V- V+ N01 N02 EN +5V N08 PS398 A0 A1 A2GND COM VOUT RL=1kΟηµ V- 10nF -5V -5V CROSSTALK = 20log OFF ISOLATION = 20log VOUT V IN Figure 5. Off Isolation VOUT V IN Figure 6. CrossTalk 8 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 +5V A2 Channel Select A1 V+ N01 PS398 1MHz Capacitance Analyzer N08 A0 GND EN V- COM f =1MHz -5V Figure 8. NO/COM Capacitance Applications Overvoltage Protection Where n = number of channels scanned: 8 for PS398, 4 for PS399. tTRANS is given on the specification table: 150 ns max. Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings may cause permanent damage to the devices. Always sequence V+ on first, followed by V-, and then logic inputs. If power-supply sequencing is not possible, add two small signal diodes or two current limiting resistors in series with the supply pins for overvoltage protection (Figure 9). Adding diodes reduces the analog signal range, but low switch resistance and low leakage characteristics are unaffected. Settling time is the time needed for the output to stabilize within the desired accuracy band of +1 LSB (least significant bit). Other factors determining settling time are: signal source impedance, capacitive load at the output. Figure 10 illustrates the steady state model. To figure out what the settling time due to the multiplexer is, we can assume that RS = 0Ω, and CL = 0. In real life, the effects of RS and CL should be taken into account when performing these calculations. Maximum Sampling Rate From the sampling theorem, the sampling frequency needed to properly recover the original signal should be more than twice its maximum component frequency. In real applications, sampling at three or four times the maximum signal frequency is customary. Positive Supply V+ The maximum sampling rate of a multiplexer is determined by its transition time (tTRANS), the number of channels being multiplexed, and the settling time (tSETTLING) of the sampled signal at the output. The maximum sampling rate is: NO fS = 1 _______________ COM (1) n (tTRANS + tSETTLING) Vg V- Figure 9. Overvoltage protection is accomplished using two external blocking diodes or two current limiting resistors. 9 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 RON V IN RS CCOM(ON) CL VS Figure 10. Equivalent model of one multiplexer channel The table below shows how many time constants (mτ) are In equation (1) above, n = 8, tTRANS = 150ns, tSETTLING = 9τ, needed to reach an accuracy of one LSB. τ = RON x CCOM(ON) Bits 8 12 15 Accuracy (%) 0.25 0.012 0.0017 τ = 100ohm x 54pF 1 fS = _______________________ , m 6 9 11 8 [150ns + 9(100ohm x 54pF)] or fS = 630kHz. Assuming a x4 oversampling rate, the maximum sampling speed for the PS398 would be 630÷4 = 157kHz. Now, let’s calculate what the maximum sampling rate for the PS398. Assume a 12-bit accuracy and room temperature operation. 10 PS8185E 10/29/03 PS398/PS399 Precision 8-Ch, Diff. 4-Ch, 17V Analog Multiplexers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Packaging Mechanical: 16-pin SOIC (pakage code W) 16 .149 .157 3.78 3.99 .0099 .0196 0.25 x 45˚ 0.50 1 .0075 .0098 0-8˚ .386 .393 9.80 10.00 0.41 1.27 .053 .068 .0155 .0260 0.393 0.660 REF 1.35 1.75 .016 .050 .2284 .2440 5.80 6.20 SEATING PLANE .050 BSC 1.27 0.19 0.25 .0040 0.10 .0098 0.25 .013 .020 0.330 0.508 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Packaging Mechanical: 16-pin QSOP (pakage code Q) 16 .008 0.20 MIN. .150 .157 .008 .013 0.20 0.33 3.81 3.99 Guage Plane .010 0.254 1 Detail A .189 .197 4.80 5.00 .041 1.04 REF .015 x 45° 0.38 .008 0.203 REF .053 1.35 .069 1.75 Detail A .008 .012 0.203 0.305 .007 .010 0.178 0.254 0.41 .016 1.27 .050 SEATING PLANE .025 BSC 0.635 0˚-6˚ .016 .035 0.41 0.89 .228 .244 5.79 6.19 .004 0.101 .010 0.254 X.XX DENOTES DIMENSIONS IN MILLIMETERS X.XX Ordering Information Part Number PS398CSE PS398ESE PS398EEE PS399CSE PS399ESE PS399EEE PS399CSEE Temperature Range 0oC to +70oC -40oC to +85oC -40oC to +85oC 0oC to +70oC -40oC to +85oC -40oC to +85oC 0oC to +70oC Package 16-pin Narrow SOIC 16-pin Narrow SOIC 16-pin QSOP 16-pin Narrow SOIC 16-pin Narrow SOIC 16-pin QSOP Pb-free and Green 16-pin Narrow SOIC Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com 11 PS8185E 10/29/03