19-1653; Rev 2; 2/04 Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches The MAX4645/MAX4646 single-pole, single-throw (SPST) analog switches feature a 2.5 typical on-resistance (RON) from a +5V supply. RON is flat (0.4 max) over the specified signal range. Each switch can handle Rail-toRail(R) analog signals. Off-leakage current is 0.25nA max at +25C. These analog switches are ideal in low-distortion applications and are the preferred solution over mechanical relays in automated test equipment or applications where current switching is required. They have low power requirements, require less board space, and are more reliable than mechanical relays. These switches operate from a +1.8V to +5V single supply, making them ideal for use in battery-powered applications. The MAX4645/MAX4646 have fast switching speeds of 12ns turn-on time (tON) and 8ns turn-off time (tOFF). The MAX4645 is a normally open (NO) switch, and the MAX4646 is a normally closed (NC) switch. Both are available in 5-pin SOT23, 6-pin SOT23, and 8-pin MAX packages. ____________________________Features +1.8V to +5V Single-Supply Operation Guaranteed RON 2.5 max (5V supply) 3.5 max (3V supply) 1.8V Operation RON 30 typ Over Temperature tON 40ns typ, tOFF 20ns typ Low RON Flatness: 0.4 max Guaranteed Low Leakage Currents 0.25nA at +25C Rail-to-Rail Output Capability TTL/CMOS-Logic Compatible -75dB Off-Isolation at 1MHz Low Distortion: 0.014% typ Ordering Information PART TEMP RANGE PINPACKAGE TOP MARK MAX4645EUK-T -40C to +85C 5 SOT23-5 ADOB AAHL ________________________Applications Battery-Powered Systems MAX4645EUT-T -40C to +85C 6 SOT23-6 MAX4645EUA -40C to +85C 8 MAX Low-Voltage Data-Acquisition Systems MAX4646EUK-T -40C to +85C 5 SOT23-5 ADOC Sample-and-Hold Circuits MAX4646EUT-T -40C to +85C 6 SOT23-6 AAHM MAX4646EUA -40C to +85C 8 MAX Audio and Video Signal Routing Communications Circuits Relay Replacement -- -- Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. Pin Configurations/Functional Diagrams/Truth Tables TOP VIEW PIN 5 COM 1 NO 5 V+ 2 COM 1 NC 5 V+ 4 MAX4646 MAX/SO/DIP IN 5 2 1 GND 3 MAX4645 MAX/SO/DIP 4 IN GND 3 SOT23-5 2 3 NOTE: SOT23-5 PACKAGE HAS LETTERING NEAREST PIN 5. SOT23-5 INPUT Pin Configurations/Functional Diagrams/ Truth Tables continued at end of data sheet. 4 XYZA 0 1 SWITCH STATE MAX4646 MAX4645 ON OFF OFF ON SWITCHES SHOWN FOR LOGIC 0 INPUT. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX4645/MAX4646 General Description MAX4645/MAX4646 Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches ABSOLUTE MAXIMUM RATINGS V+, VIN to GND ...........................................................-0.3 to +6V COM, NO, NC to GND (Note 1)....................-0.3V to (V+ + 0.3V) Continuous Current (any terminal)....................................50mA Peak Current COM, NO, NC (pulsed at 1ms 10% duty cycle)................................100mA Continuous Power Dissipation (TA = +70C) 5-Pin SOT23 (derate 7.1mW/C above+70C)............571mW 6-Pin SOT23 (derate 8.7mW/C above +70C)...........696mW 8-Pin MAX (derate 4.1mW/C above+70C) .............330mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Note 1: Signals on NO, NC, or COM, exceeding V+ or GND are clamped by internal diodes. Limit forward current to maximum current rating. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS--Single +5V Supply (V+ = 4.5V to 5.5V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise specified.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Input Voltage Range VCOM, VNO, VNC 0 ICOM = 10mA, VNO or VNC = 0 to V+, V+ = 4.5V TA = +25C On-Resistance Flatness (Note 4) ICOM = 10mA, RFLAT(ON) VNO or VNC = 0 to V+, V+ = 4.5V TA = +25C Off-Leakage Current (NO or NC) (Notes 5, 6) INO(OFF), INC(OFF) VCOM = 1V, 4.5V; VNO or VNC = 4.5V, 1V; V+ = 5.5V TA = +25C -0.25 TA = TMIN to TMAX -0.35 COM Off-Leakage Current (Notes 5, 6) VCOM = 1V, 4.5V; ICOM(OFF) VNO or VNC = 4.5V, 1V; V+ = 5.5V TA = +25C -0.25 TA = TMIN to TMAX -0.35 COM On-Leakage Current (Notes 5, 6) TA = +25C -0.25 ICOM(ON) TA = TMIN to TMAX -0.35 COM to NO or NC On-Resistance RON V+ = 5.5V; VCOM = 4.5V, 1V; VNO or VNC = 4.5V, 1V, or floating 1.5 2.5 3 TA = TMIN to TMAX 0.1 0.4 0.6 TA = TMIN to TMAX 0.01 0.25 nA 0.35 0.01 0.25 nA 0.35 0.01 0.25 nA 0.35 LOGIC INPUT Input Logic High VIH Input Logic Low VIL Logic Input Current IIN 2.4 -0.1 VIN_ = 0.8V or 2.4V V 0.8 V 0.005 0.1 A 12 15 SWITCH DYNAMIC CHARACTERISTICS 2 Turn-On Time (Note 5) tON VNO, VNC = 3V, RL = 300, CL = 35pF, Figure 2 TA = +25C Turn-Off Time (Note 5) tOFF VNO, VNC = 3V, RL = 300, CL = 35pF, Figure 2 TA = +25C 18 TA = TMIN to TMAX 8 TA = TMIN to TMAX _______________________________________________________________________________________ 10 12 ns ns Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches (V+ = 4.5V to 5.5V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise specified.) (Notes 2, 3) PARAMETER Charge Injection SYMBOL Q CONDITIONS MIN TYP MAX UNITS VGEN = 2V, CL = 1.0nF, RGEN = 0, Figure 3 TA = +25C 5 pC NO or NC Capacitance COFF VNO , VNC = GND, f = 1MHz, Figure 5 TA = +25C 17 pF COM Off-Capacitance CCOM VCOM = GND, f = 1MHz, Figure 5 TA = +25C 17 pF COM On-Capacitance CCOM VCOM = VNO, VNC = GND f = 1MHz, Figure 5 TA = +25C 38 pF VNO = VNC = 1VRMS, RL = 50, CL = 5pF, f = 10MHz, Figure 4 TA = +25C -55 dB VNO = VNC = 1VRMS, RL = 50, CL = 5pF, f = 1MHz, Figure 4 TA = +25C -75 dB RL = 600, 5VP-P, f = 20Hz to 20kHz TA = +25C 0.014 % V+ = 5.5V, VIN = 0 or V+, all channels on or off TA = +25C 0.0001 TA = TMIN to TMAX Off-Isolation (Note 7) Total Harmonic Distortion VISO THD POWER SUPPLY Positive Supply Current I+ 1.0 A ELECTRICAL CHARACTERISTICS--Single +3V Supply (V+ = 2.7V to 3.3V, VIH = 2.0V, VIL = 0.4V, TA = TMIN to TMAX, unless otherwise specified.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Input Voltage Range VCOM, VNO, VNC 0 ICOM = 10mA, VNO or VNC = 0 to V+, V+ = 2.7V TA = +25C On-Resistance Flatness (Note 4) ICOM = 10mA, RFLAT(ON) VNO or VNC = 0 to V+, V+ = 2.7V TA = +25C Off-Leakage Current (NO or NC) (Notes 5, 6) INO(OFF), INC(OFF) VCOM = 1V, 3V; VNO or VNC = 3V, 1V; V+ = 3.3V TA = +25C -0.25 TA = TMIN to TMAX -0.35 COM Off-Leakage Current (Notes 5, 6) VCOM = 1V, 3V; ICOM(OFF) VNO or VNC = 3V, 1V; V+ = 3.3V TA = +25C -0.25 TA = TMIN to TMAX -0.35 COM On-Leakage Current (Notes 5, 6) V+ = 3.3V; VCOM = 1V, 3V; TA = +25C VNO or VNC = 1V, TA = TMIN to TMAX 3V or floating -0.25 ICOM(ON) COM to NO or NC On-Resistance RON 2.5 3.5 4.5 TA = TMIN to TMAX 0.5 0.9 1 TA = TMIN to TMAX 0.01 0.25 nA 0.35 0.01 0.25 nA 0.35 0.01 0.25 nA -0.35 0.35 _______________________________________________________________________________________ 3 MAX4645/MAX4646 ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued) MAX4645/MAX4646 Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches ELECTRICAL CHARACTERISTICS--Single +3V Supply (continued) (V+ = 2.7V to 3.3V, VIH = 2.0V, VIL = 0.4V, TA = TMIN to TMAX, unless otherwise specified.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LOGIC INPUT Input Logic High VIH Input Logic Low VIL Logic Input Current IIN 2.0 -1 VIN_ = 0.4V or 2.0V V 0.4 V 0.005 1 A 12 15 SWITCH DYNAMIC CHARACTERISTICS Turn-On Time (Note 5) Turn-Off Time (Note 5) Charge Injection tON VNO, VNC = 2.0V, RL = 300, CL = 35pF, Figure 2 TA = +25C tOFF VNO, VNC = 2.0V, RL = 300, CL = 35pF, Figure 2 TA = +25C Q ns 20 TA = TMIN to TMAX 8 10 ns 13 TA = TMIN to TMAX VGEN = 1.5V, CL = 1.0nF, RGEN = 0, Figure 3 TA = +25C 4 pC NO or NC Capacitance COFF VNO, VNC = GND, f = 1MHz, Figure 5 TA = +25C 17 pF COM Off-Capacitance CCOM VCOM = GND, f = 1MHz, Figure 5 TA = +25C 17 pF COM On-Capacitance CCOM VCOM = VNO, VNC = GND, f = 1MHz, Figure 5 TA = +25C 38 pF VNO = VNC = 1VRMS, RL = 50, CL = 5pF, f = 10MHz, Figure 4 TA = +25C -55 VNO = VNC = 1VRMS, RL = 50, CL = 5pF, f = 1MHz, Figure 4 TA = +25C -75 TA = +25C 0.0001 Off-Isolation (Note 7) VISO dB POWER SUPPLY Positive Supply Current I+ V+ = 3.3V, VIN = 0 or V+, all channels on or off TA = TMIN to TMAX 1.0 A Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value is a maximum, is used in this data sheet. Note 3: SOT packages are 100% production tested at +25C. Limits at the maximum rated temperature are guaranteed by correlation. Note 4: Flatness is defined as the difference between the maximum and the minimum value of on-resistance as measured over the specified analog signal ranges. Note 5: Guaranteed by design. Note 6: Leakage parameters are 100% tested at +85C and guaranteed by correlation at +25C. Note 7: Off-Isolation = 20log10(VCOM / VNO), VCOM = output, VNO = input to off switch. 4 _______________________________________________________________________________________ Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches ON-RESISTANCE vs. VCOM AND SUPPLY VOLTAGE ON-RESISTANCE vs. VCOM AND TEMPERATURE 2.0 TA = +85C RON () 6 TA = +25C 1.0 V+ = 2.5V 4 1.5 TA = -40C V+ = 3V OFF-LEAKAGE V+ = 4.5V V+ = 5V 0 1 2 3 4 5 V+ = 5.5V 0.01 0 0 0 1 2 3 4 -40 5 -20 0 20 40 60 80 VCOM (V) VCOM (V) TEMPERATURE (C) SUPPLY CURRENT vs. SUPPLY VOLTAGE AND TEMPERATURE TURN-ON/TURN-OFF TIME vs. TEMPERATURE TURN-ON/TURN-OFF TIME vs. VCOM tON 10 50 TA = +85C 20 6 tON/tOFF (ns) 30 tON/tOFF (ns) 40 6 4 2 TA = -40C 0 VCOM = 3V V+ = 5V -10 1 2 3 4 -20 0 20 40 60 80 TEMPERATURE (C) CHARGE INJECTION vs. VCOM TOTAL HARMONIC DISTORTION vs. FREQUENCY V+ = 5V V+ = 5V 1.0 0.014 THD (%) 0.010 5 0 0.008 0.006 -5 0.002 -15 0 1 2 3 VCOM (V) 4 5 3.5 4.0 4.5 5.0 -20 -30 -40 -50 OFF-LOSS -60 -80 INPUT IMPEDANCE = 600 f = 20Hz TO 50kHz V+ = 5V 50 IN AND OUT -90 0 -20 3.0 -70 0.004 -10 2.5 ON-LOSS -10 RESPONSE (dB) V+ = 3V 2.0 FREQUENCY RESPONSE 0.012 15 1.5 0 MAX4645/6-08 25 100 VCOM (V) 0.016 MAX4645/6-07 30 10 3 0 -40 5 SUPPLY VOLTAGE (V) 20 tOFF 4 1 0 0 5 2 TA = +25C 10 tON 7 tOFF 8 MAX4645/6-06 60 8 MAX4645/6-05 12 MAX4645/6-04 70 SUPPLY CURRENT (nA) 0.1 0.5 2 CHARGE INJECTION (pC) ON-LEAKAGE MAX4645/6-09 RON () 8 MAX4645/6-03 10 1 ON/OFF-LEAKAGE (nA) V+ = 1.8V MAX4645/6-02 2.5 MAX4645/6-01 12 ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE -100 0.01 0.1 1 FREQUENCY (kHz) 10 100 0.1 1 10 100 1000 FREQUENCY (MHz) _______________________________________________________________________________________ 5 MAX4645/MAX4646 __________________________________________Typical Operating Characteristics (TA = +25C, unless otherwise noted.) MAX4645/MAX4646 Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches Pin Description PIN MAX4645 MAX4646 NAME SOT23-5 SOT23-6 MAX SOT23-5 SOT23-6 MAX 1 1 1 1 1 1 COM FUNCTION Analog Switch Common Terminal 2 2 8 -- -- -- NO Analog Switch Normally Open Terminal -- -- -- 2 2 8 NC Analog Switch Normally Closed Terminal 3 3 7 3 3 7 GND 4 4 6 4 4 6 IN -- 5 2, 3, 5 -- 5 2, 3, 5 N.C. 5 6 4 5 6 4 V+ Ground Logic Control Input No Connection. Not internally connected. Positive Supply Voltage Detailed Description POSITIVE SUPPLY The MAX4645/MAX4646 are low 2.5 max on-resistance (at V+ = 5V), low-voltage analog switches that operate from a +1.8V to +5.5V single supply. CMOS switch construction allows processing analog signals that are within the supply voltage range (GND to V+). D1 Applications Information Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum ratings because stresses beyond the listed ratings can cause permanent damage to the devices. Always sequence V+ on first, followed by the logic inputs, NO, or COM. If power-supply sequencing is not possible, add two small signal diodes (D1, D2) in series with the supply pins for overvoltage protection (Figure 1). Adding these diodes reduces the analog signal by one diode drop below V+ and one diode drop above GND, but does not affect the low switch resistance and low leakage characteristics of the device. Device operation is unchanged, and the difference between V+ and GND should not exceed 6V. Although it is not required, power-supply bypassing improves noise margin and prevents switching noise from propagating from the V+ supply to other components. A 0.1F capacitor, connected from V+ to GND, is adequate for most applications. 6 MAX4645 MAX4646 V+ NO COM Vg GND D2 Figure 1. Overvoltage Protection Using Two External Blocking Diodes _______________________________________________________________________________________ Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches MAX4645 MAX4646 V+ V+ SWITCH V INPUT COM NO COM LOGIC INPUT SWITCH OUTPUT 50% 0 VOUT RL 300 CL 35pF t OFF IN VOUT GND LOGIC INPUT SWITCH OUTPUT 0.9 x V0UT 0.9 x VOUT 0 t ON CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VCOM RL + RON ( t r < 5ns t f < 5ns V+ LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. ) Figure 2. Switching Time V+ MAX4645 MAX4646 VOUT V+ RGEN COM VOUT NO VOUT CL V GEN GND IN VIN IN OFF ON OFF Q = (V OUT )(C L ) Figure 3. Charge Injection _______________________________________________________________________________________ 7 MAX4645/MAX4646 Test Circuits/Timing Diagrams MAX4645/MAX4646 Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches _________________________________Test Circuits/Timing Diagrams (continued) 10nF V+ 10nF MAX4645 MAX4646 V+ MAX4645 MAX4646 V+ SIGNAL GENERATOR 0dBm COM COM V+ IN ANALYZER VIL OR VIH IN CAPACITANCE METER NO NC OR NO f = 1MHz VIL OR VIH GND GND RL Figure 4. Off-Isolation/On-Channel Bandwidth Figure 5. Channel Off/On-Capacitance Pin Configurations/Functional Diagrams/Truth Tables (continued) TOP VIEW COM 1 6 V+ NO 2 5 N.C. 4 IN GND 3 MAX4645 COM 1 6 V+ NC 2 5 N.C. GND 3 6 5 NOTE: SOT23-6 PACKAGE HAS LETTERING NEAREST PIN 6. 2 IN 8 NO COM 1 8 NC N.C. 2 7 GND N.C. 2 7 GND N.C. 3 6 IN N.C. 3 6 IN 5 N.C. 5 N.C. V+ 4 MAX4645 V+ 4 MAX4646 MAX MAX 4 XYZA 1 4 SOT23-6 SOT23-6 PIN 6 MAX4646 COM 1 3 INPUT 0 1 SWITCH STATE MAX4646 MAX4645 ON OFF OFF ON N.C. = NOT INTERNALLY CONNECTED SWITCHES SHOWN FOR LOGIC 0 INPUT. Chip Information TRANSISTOR COUNT: 50 8 _______________________________________________________________________________________ Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches SOT-23 5L .EPS PACKAGE OUTLINE, SOT-23, 5L 21-0057 E 1 1 _______________________________________________________________________________________ 9 MAX4645/MAX4646 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) g ( ) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 6LSOT.EPS MAX4645/MAX4646 Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches PACKAGE OUTLINE, SOT-23, 6L 21-0058 10 ______________________________________________________________________________________ F 1 1 Fast, Low-Voltage, 2.5, SPST, CMOS Analog Switches E y 0.500.1 8 INCHES DIM A A1 A2 b H c D e E H 0.60.1 1 L 1 0.60.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6 0 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0 6 0.5250 BSC TOP VIEW A1 A2 e A c b L SIDE VIEW FRONT VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 Note: The MAX4645/MAX4646 do not have an exposed paddle. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 11 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX4645/MAX4646 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)