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| 19-1657; Rev 0; 3/00 High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch General Description The MAX4644 is a single-pole/double-throw (SPDT) switch that operates from a single supply ranging from +1.8V to +5.5V. It provides low 4 on-resistance (RON) as well as 1 RON flatness over the entire analog signal range. The MAX4644 offers fast switching times of less than 20ns while ensuring break-before-make operation. It typically consumes only 0.01W of quiescent power, making it suitable for use in low-power, portable applications. The MAX4644's features include low leakage currents over the entire temperature range, TTL/CMOS-compatible digital logic, and excellent AC characteristics. It is packaged in either a small 8-pin MAX or a tiny 6-pin SOT23. Features o +1.8V to +5.5V Single-Supply Operation o Rail-to-Rail(R) Analog Signal Range o Guaranteed RON 4 max (+5V supply) 8 max (+3V supply) o +1.8V Operation RON 30 typ Over Temperature tON 18ns typ, tOFF 12ns typ o Guaranteed RON Flatness: 0.75 typ (+5V supply) o Guaranteed RON Match Between Channels: 0.1 typ (+5V supply) o Low Leakage (<0.35nA) Over Entire Temperature Range o Excellent AC Characteristics Low Crosstalk: -82dB at 1MHz High Off-Isolation: -80dB at 1MHz 0.018% Total Harmonic Distortion o Low Power Consumption: < 0.01W MAX4644 ________________________Applications Battery-Operated Equipment Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Sample-and-Hold Circuits Communications Circuits Ordering Information PART MAX4644EUT-T MAX4644EUA TEMP. RANGE -40C to +85C -40C to +85C PINPACKAGE 6 SOT23-6 8 MAX TOP MARK AAHQ -- Rail-to-Rail is a trademark of Nippon Motorola, Ltd. Pin Configurations/Functional Diagrams/Truth Table TOP VIEW MAX4644 IN 1 V+ 2 GND 3 6 5 4 NO COM NC COM 1 NC 2 GND 3 V+ 4 MAX4644 8 7 6 5 NO N.C. IN N.C. SOT23-6 MAX MAX4644 IN 0 1 NC ON OFF NO OFF ON ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 ABSOLUTE MAXIMUM RATINGS All Voltages Referenced to GND V+ .............................................................................-0.3V to +6V IN, COM, NO, NC (Note 1) ...........................-0.3V to (V+ + 0.3V) Continuous Current (any terminal)....................................20mA Continuous Current (NO, NC, and COM) .........................50mA Peak Current (NO, NC, and COM, pulsed at 1ms, 10% duty cycle)......................................................... 100mA Continuous Power Dissipation (TA = +70C) 6-Pin SOT23 (derate 8.70mW/C above +70C)........ 696mW 8-Pin MAX (derate 4.5mW/C above +70C) ........... 362mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) ................................ +300C Note 1: Signals on NO, NC, COM, or IN exceeding V+ or GND are clamped by internal diodes. Limit forward-diode 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, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCH Analog Signal Range VCOM, VNO, VNC RON V+ = 4.5V, ICOM = 10mA, VNO or VNC = 0 to V+ V+ = 4.5V, ICOM = 10mA, VNO or VNC = 0 to V+ V+ = 4.5V, ICOM = 10mA, VNO or VNC = 0 to V+ V+ = 5.5V, VCOM = 1V or 4.5V, VNO or VNC = 4.5V or 1V V+ = 5.5V, VCOM = 1V or 4.5V, VNO or VNC = 4.5V or 1V V+ = 5.5V, VCOM = 1V or 4.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.25 -0.35 -0.25 -0.35 -0.25 -0.35 2.4 0.8 VIN = 0.8V or 2.4V -0.1 0.005 0.1 0.01 0.01 0.01 0.75 0.1 0.4 1 1.2 0.25 nA 0.35 0.25 nA 0.35 0.25 0.35 nA 0 V+ V SYMBOL CONDITIONS MIN TYP MAX UNITS 2.5 4 4.75 On-Resistance On-Resistance Match Between Channels (Note 2) RON On-Resistance Flatness (Note 3) RFLAT NO, NC Off-Leakage Current (Note 4) INO(OFF), INC(OFF) COM Off-Leakage Current (Note 4) COM On-Leakage Current (Notes 4, 5) DIGITAL INPUTS INPUTS Input Logic High Input Logic Low Input Current ICOM(OFF) ICOM(ON) VIH VIL IIN V V A 2 _______________________________________________________________________________________ High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 ELECTRICAL CHARACTERISTICS --Single +5V Supply (continued) (V+ = +4.5V to +5.5V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER DYNAMIC Turn-On Time (Note 4) tON RL = 300; CL = 35pF; VNO, VNC = 3V; Figure 2 RL = 300; CL = 35pF; VNO, VNC = 3V; Figure 2 RL = 300; CL = 35pF; VNO or VNC = +3V; Figure 2 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1 5 12 34 f = 10MHz f = 1MHz f = 10MHz f = 1MHz -55 -80 -62 -82 0.018 0.001 1.0 pC pF pF dB dB % A 8 ns 3 11 15 ns 18 5 ns 6 SYMBOL CONDITIONS MIN TYP MAX UNITS Turn-Off Time (Note 4) tOFF Break-Before-Make (Note 4) Charge Injection NO, NC Off-Capacitance Switch On-Capacitance Off-Isolation (Note 6) Crosstalk (Note 7) Total Harmonic Distortion SUPPLY Positive Supply Current tBBM Q CNO(OFF), CNC(OFF) C(ON) VISO VCT THD I+ VGEN = 0, RGEN = 0, CL = 1nF, Figure 4 NO or NC = GND, f = 1MHz, Figure 5 f = 1MHz, Figure 5 CL = 5pF, RL = 50, Figure 3 CL = 5pF, RL = 50, Figure 3 RL = 600, 0.5Vp-p, f = 20Hz to 20kHz V+ = 5.5V, VIN = 0 or V+ ELECTRICAL CHARACTERISTICS--Single +3V Supply (V+ = +2.7V to +3.3V, VINH = 2.0V, VINL = 0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCH Analog Signal Range VCOM, VNO, VNC RON V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0 to V+ V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0 to V+ V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0 to V+ TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1.5 0.1 0.4 3 3.5 0 V+ V SYMBOL CONDITIONS MIN TYP MAX UNITS 6 8 9 On-Resistance On-Resistance Match Between Channels (Note 2) On-Resistance Flatness (Note 3) RON RFLAT _______________________________________________________________________________________ 3 High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 ELECTRICAL CHARACTERISTICS--Single +3V Supply (continued) (V+ = +2.7V to +3.3V, VINH = 2.0V, VINL = 0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER DIGITAL INPUTS Input Logic High Input Logic Low Input Current DYNAMIC Turn-On Time (Note 4) tON RL = 300; CL = 35pF; VNO, VNC = 2V; Figure 2 RL = 300; CL = 35pF; VNO, VNC = 2V; Figure 2 RL = 300; CL = 35pF; VNO, VNC = 2V; Figure 2 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1 5 12 34 f = 10MHz f = 1MHz f = 10MHz f = 1MHz -55 -80 -62 -82 0.001 1.0 pC pF pF dB dB 8 ns 4 14 20 ns 22 7.5 ns 8 VIH VIL IIN VIN = 0.4V or 2.0V -0.1 0.005 2.0 0.4 0.1 V V A SYMBOL CONDITIONS MIN TYP MAX UNITS Turn-Off Time (Note 4) tOFF Break-Before-Make (Note 4) Charge Injection NO, NC Off-Capacitance Switch On-Capacitance Off-Isolation (Note 6) Crosstalk (Note 7) SUPPLY Positive Supply Current tBBM Q CNO(OFF), CNC(OFF) C(ON) VISO VCT VGEN = 0, RGEN = 0, CL = 1nF, Figure 4 NO or NC = GND, f = 1MHz, Figure 5 f = 1MHz, Figure 5 CL = 5pF, RL = 50, Figure 3 CL = 5pF, RL = 50, Figure 3 I+ V+ = 3.3V, VIN = 0 or V+ A Note 2: RON = RON(MAX) - RON(MIN). Note 3: RON flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 4: Guaranteed by design. Note 5: On-Leakage performed with voltage applied to COM, with NO and NC left floating. Note 6: Off-Isolation = 20log10 (VO / VI), where VO is VCOM and VI is either VNC or VNO from the network analyzer. Note 7: Crosstalk is measured between the two switches. 4 _______________________________________________________________________________________ High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch Typical Operating Characteristics (V+ = +5V or +3V, VINH = V+, VINL = GND, TA = +25C, unless otherwise noted.) MAX4644 ON-RESISTANCE vs. VCOM MAX4644-01 ON-RESISTANCE vs. TEMPERATURE ICOM = 10mA MAX4644-02 ON-/OFF-LEAKAGE CURRENT vs. TEMPERATURE MAX4644-03 20 ICOM = 10mA 5 1000 15 V+ = 1.8V RON () RON () 4 V+ = 3V LEAKAGE (pA) 100 OFF-LEAKAGE 10 V+ = 2.5V 5 V+ = 3V V+ = 5V 3 V+ = 5V 2 10 ON-LEAKAGE 0 0 1 2 VCOM (V) 3 4 5 1 -40 -15 10 35 60 85 TEMPERATURE (C) 1 -40 -15 10 35 60 85 TEMPERATURE (C) CHARGE INJECTION vs. VCOM MAX4644-04 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX4644-05 SUPPLY CURRENT vs. TEMPERATURE IN = GND MAX4644-06 140 120 CHARGE INJECTION (pC) 100 80 60 40 20 0 0 V+ = 5V 140 120 SUPPLY CURRENT (nA) 100 80 60 40 20 IN = V+ 0 IN = GND 300 250 SUPPLY CURRENT (nA) 200 V+ = 5V 150 100 50 0 V+ = 1.8V V+ = 3V 1 2 VCOM (V) 3 4 5 1.8 2.8 3.8 4.8 SUPPLY VOLTAGE (V) 5.8 -40 -15 10 35 60 85 TEMPERATURE (C) LOGIC THRESHOLD vs. SUPPLY VOLTAGE MAX4644-07 SWITCHING TIMES vs. SUPPLY VOLTAGE MAX4644-08 SWITCHING TIMES vs. TEMPERATURE V+ = 5V MAX4644-09 2.0 15 10 SWITCHING TIMES (ns) LOGIC THRESHOLD (V) SWITCHING TIMES (ns) 1.5 12 8 tON 6 tOFF 4 9 tON 6 tOFF 3 1.0 0.5 2 0 1.8 2.6 3.4 4.2 5.0 5.8 SUPPLY VOLTAGE (V) 0 2 3 4 5 SUPPLY VOLTAGE (V) 0 -40 -15 10 35 60 85 TEMPERATURE (C) _______________________________________________________________________________________ 5 High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 Typical Operating Characteristics (continued) (V+ = +5V or +3V, VINH = V+, VINL = GND, TA = +25C, unless otherwise noted.) FREQUENCY RESPONSE MAX4644-10 TOTAL HARMONIC DISTORTION vs. FREQUENCY V+ = 5V MAX4644-11 0 V+ = 5V -10 -20 -30 -40 -50 -60 -70 -80 -90 0.01 0.1 1 10 100 ON-LOSS OFF-ISOLATION 0.05 0.04 THD (%) 1000 (dB/div) 0.03 0.02 0.01 0 0.01 0.1 1 FREQUENCY (kHz) 10 100 FREQUENCY (MHz) Pin Description MAX4644 NAME SOT23 1 2 3 -- 4 5 6 MAX 6 4 3 5, 7 2 1 8 IN V+ GND N.C. NC COM NO Logic-Controlled Input Positive Supply Voltage Input. Bypass with a 0.1F capacitor to GND. Ground No Connection. Not internally connected. Analog Switch Normally Closed Terminal Analog Switch Common Terminal Analog Switch Normally Open Terminal FUNCTION Note: The switches are bidirectional, which means that a signal can be passed through either side of the on switch. However, the typical off-capacitances differ as shown in the Electrical Characteristics. 6 _______________________________________________________________________________________ High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch V+ N0, NC COM GND Figure 1. Overvoltage Protection Using External Blocking Diodes Applications Information The MAX4644 operates from a single supply ranging from +1.8V to +5.5V. The device is guaranteed to be functional over that supply range, but TTL/CMOS compatibility is only valid for operation using a +5V supply. All voltage levels are referenced to GND. Positive and negative DC analog inputs or AC signals can be accommodated by shifting V+ and GND. ESD-protection diodes are internally connected between each analog-signal pin and both V+ and GND. One of these diodes conducts if any analog signal exceeds V+ or GND (Figure 1). Virtually all of the analog leakage current comes from the ESD diodes to V+ or GND. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V+ or GND and the analog signal. This means their leakages will vary as the signal varies. The difference in the two diode leakages to the V+ and GND pins constitutes the analog-signal-path leakage current. All analog leakage current flows between each pin and one of the supply terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity. There is no normal current path between the analogsignal paths and V+ or GND. V+ and GND also power the internal logic and logic-level translators. The logiclevel translators convert the logic level into switched V+ and GND signals to drive the analog signal gates. MAX4644 Chip Information TRANSISTOR COUNT: 105 _______________________________________________________________________________________ 7 High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 V+ V+ VIH + 0.5V IN 0 COM 35pF 50 GND 300 VCOM VNO VCOM 0 tON tOFF 50% 50% tr < 5ns tf < 5ns VNO NO NC OPEN MAX4644 VIN IN 90% 90% V+ V+ VIH + 0.5V IN 0 COM GND 300 VCOM 35pF VNC VCOM 0 tOFF 50% 50% VNC NC NO OPEN MAX4644 VIN IN 50 90% 90% tON V+ V+ VIH + 0.5V IN 0 VCOM 300 35pF 0 tBBM tBBM = tON(NC) - tOFF(NO) OR tBBM = tON(NO) - tOFF(NC) tBBM VS VCOM 50 GND VS VNO VNC VS 50% 50% MAX4644 VIN IN COM 90% 90% Figure 2. Switching Times 8 _______________________________________________________________________________________ High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 V+ 0.1F NETWORK ANALYZER 50 50 V+ NO OR NC 50 VIN MAX4644 V+ IN GND COM VOUT MEAS REF 50 50 MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM AND "ON" TERMINAL ON EACH SWITCH. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED. OFF-ISOLATION = 20log VOUT VIN V ON-LOSS = 20log OUT VIN Figure 3. Off-Isolation and On-Loss V+ V+ V+ NO OR NC VNO OR VNC = 0V V+ NO OR NC VIN MAX4644 IN GND 50 COM VOUT CL 1000pF AS REQUIRED MAX4644 IN GND COM 1MHz CAPACITANCE ANALYZER V+ VIN 0 Figure 5. NO, NC, and COM Capacitance VOUT VOUT VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT x CL Figure 4. Charge Injection _______________________________________________________________________________________ 9 High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 Package Information 6LSOT.EPS 10 ______________________________________________________________________________________ High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch Package Information (continued) 8LUMAXD.EPS MAX4644 ______________________________________________________________________________________ 11 High-Speed, Low-Voltage, 4, SPDT CMOS Analog Switch MAX4644 NOTES 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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