19-1906; Rev 0; 2/01 45Ω, SPDT Analog Switch in SOT23-8 Features ♦ Low On-Resistance 45Ω max ±15V Supplies ♦ 5Ω max RON Match Between Channels ♦ Guaranteed RON Flatness Over Specified Signal Range (7Ω max) ♦ VL Logic Supply Not Required ♦ Rail-to-Rail Signal Handling ♦ +9V to +36V Single Supply Operation ♦ ±4.5V to ±20V Dual Supply Operation ♦ Low Crosstalk: -92dB at 1MHz ♦ High Off-Isolation: -92dB at 1MHz ♦ TTL/CMOS-Compatible Control Inputs Applications PBX, PABX Systems Communication Systems DSL Ordering Information PART TEMP. RANGE MAX4649EKA-T -40°C to +85°C PINPACKAGE TOP MARK 8-SOT23 AAIE Test Equipment Avionics Audio Systems Redundant Systems Relay Replacement PC Multimedia Boards Pin Configuration TOP VIEW COM 1 8 NO NC 2 7 V- GND 3 6 IN 5 N.C. V+ 4 MAX4649 SOT23-8 Rail-to-Rail is a registered trademark of Nippon Motorola, Inc. LOGIC 0 1 NO OFF ON NC ON OFF ________________________________________________________________ Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX4649 General Description The MAX4649 is a dual-supply, single-pole/doublethrow (SPDT) analog switch. On-resistance is 45Ω max and flat (7Ω max) over the specified signal range. The MAX4649 can handle Rail-to-Rail® analog signals, and conducts analog or digital signals equally well in either direction. This switch operates from a single +9V to +36V supply, or from ±4.5V to ±20V dual supplies. The primary application areas are in the switching and routing of signals in telecommunications and test equipment. The MAX4649 features a switch transition time of 130ns max at +25°C, and a guaranteed break-before-make switching time of 5ns. Off-leakage current is only 2nA max at +25°C. The MAX4649 is available in a tiny 8-pin SOT23 package. MAX4649 45Ω, SPDT Analog Switch in SOT23-8 ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) V+ ........................................................................-0.3V to +44.0V V- .........................................................................-44.0V to +0.3V V+ to V-................................................................-0.3V to +44.0V All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V) Continuous Current into any Terminal ..............................±10mA Continuous Current (COM, NO, NC) ................................±30mA Peak Current (COM, NO, NC) (pulsed at 1ms, 10% duty cycle)..................................±60mA Continuous Power Dissipation (TA = +70°C) 8-Pin SOT23 (derate 8.9mW/°C above +70°C)...........714mW Operating Temperature Range MAX4649EKA ............................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: Signals on NO, NC, COM, or IN exceeding V+ or V- 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—Dual ±15V Supplies (V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS TA MIN TYP MAX UNITS V+ V ANALOG SWITCH Analog Signal Range VNO, VNC, VCOM V+25°C RON ICOM = 1mA; VNO or VNC = ±10V TMIN to TMAX On-Resistance Matching Between Channels ∆RON ICOM = 1mA; VNO or VNC = ±10V TMIN to TMAX On-Resistance Flatness (Note 4) RFLAT (ON) ICOM = 1mA; VNO or VNC = +5V, 0, -5V INO(OFF) or INC(OFF) VCOM = -14V, +14V; VNO or VNC = +14V, -14V ICOM(ON) VCOM = +14V, -14V; VNO or VNC = +14V, -14V or floating On-Resistance NO or NC Off-Leakage Current COM On-Leakage Current 33 45 60 +25°C 0.6 5 6 +25°C 1.5 TMIN to TMAX 7 10 +25°C -2 0.01 TMIN to TMAX -10 10 +25°C -4 4 TMIN to TMAX -20 20 Ω Ω Ω 2 nA nA DIGITAL I/O Input Logic High Voltage VIH Input Logic Low Voltage VIL Input Leakage IIN 2 2.4 VIN = 0 or +5V -1 _______________________________________________________________________________________ V 0.8 V 1 µA 45Ω, SPDT Analog Switch in SOT23-8 (V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS TA MIN TYP MAX 90 130 UNITS DYNAMIC CHARACTERISTICS Transition Time tTRANS Break-Before-Make Delay Charge Injection Off-Isolation tD VNO or VNC = ±10V; RL = 1kΩ; CL = 35pF; Figure 2 VNO or VNC = ±10V; RL = 300Ω; CL = 35pF; Figure 3 +25°C ns TMIN to TMAX 170 +25°C 5 TMIN to TMAX 2 10 ns Q VGEN = 0; RGEN = 0; CL = 1nF; Figure 4 2 pC VISO f = 1MHz, RL = 50Ω, CL = 5pF, VCOM = 1VRMS; Figure 5 92 dB f = 1MHz, RL = 50Ω, CL = 5pF; Figure 6 92 Crosstalk THD f = 20Hz to 20kHz, RL = 600Ω, 5VRMS 0.015 % VNO or VNC Off-Capacitance CNO(OFF), CNC(OFF) f = 1MHz; Figure 7 6 pF COM On-Capacitance CCOM(ON) f = 1MHz; Figure 8 17 pF Total Harmonic Distortion POWER SUPPLY ±4.5 Power-Supply Range VIN = 5V Positive Supply Current I+ VIN = 0 or V+ Negative Supply Current I- VIN = 0 or 5V +25°C ±20 38 TMIN to TMAX +25°C TMIN to TMAX 75 100 0.01 TMIN to TMAX +25°C V 1 µA 10 0.01 1 10 µA _______________________________________________________________________________________ 3 MAX4649 ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies (continued) MAX4649 45Ω, SPDT Analog Switch in SOT23-8 ELECTRICAL CHARACTERISTICS—Single +12V Supply (V+ = +12V, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS TA MIN TYP MAX UNITS V+ V ANALOG SWITCH Analog Signal Range VNO, VNC, VCOM 0 On-Resistance RON ICOM = 1mA; VNO or VNC = +10V On-Resistance Matching Between Channels ∆RON ICOM = 1mA; VNO or VNC = +10V RFLAT (ON) ICOM = 1mA; VNO or VNC = +2V, +6V, +10V On-Resistance Flatness (Note 4) +25°C 68 TMIN to TMAX 90 115 +25°C 0.7 TMIN to TMAX 6 7 +25°C 9 TMIN to TMAX 17 23 Ω Ω Ω DYNAMIC Transition Time Break-Before-Make Delay Charge Injection tTRANS tD Q VNO or VNC = 0, 10V or 10V, 0; RL = 1kΩ; CL = 35pF; Figure 2 VNO or VNC = +10V; RL = 300Ω; CL = 35pF; Figure 3 VGEN = 0; RGEN = 0; CL = 1nF; Figure 4 +25°C 116 165 ns TMIN to TMAX 200 +25°C 1 TMIN to TMAX 1 36 ns +25°C 1 pC POWER SUPPLY Power Supply Range 9 VIN = +5V Positive Supply Current I+ VIN = 0 or V+ +25°C 36 22 TMIN to TMAX +25°C 40 50 0.01 TMIN to TMAX V 1 µA 10 Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 3: All parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation. Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. 4 _______________________________________________________________________________________ 45Ω, SPDT Analog Switch in SOT23-8 ON-RESISTANCE vs. VCOM (SINGLE SUPPLY) 45 A 60 B 50 C 70 60 V+ = +18V 50 D 40 40 V+ = +12V E RON (Ω) RON (Ω) 80 35 V+ = +30V 30 15 V+ = +36V 20 20 -10 0 10 10 20 30 40 -15 -10 -5 0 5 10 VCOM (V) VCOM (V) VCOM (V) ON-RESISTANCE vs. VCOM AND TEMPERATURE ON-LEAKAGE CURRENT vs. TEMPERATURE OFF-LEAKAGE CURRENT vs. TEMPERATURE V- = 0 80 ON-LEAKAGE (nA) TA = +85°C 70 TA = +25°C 60 50 1 V+ = +15V V- = -15V VCOM = ±10V V+ = +15V V- = -15V VCOM = 10V VNC OR VNO = ±10V 0.1 0.1 DUAL SUPPLIES 0.01 1 OFF-LEAKAGE (nA) V+ = +12V 0.001 15 MAX4649 toc06 10 MAX4649 toc04 100 90 V- = -15V 10 0 20 MAX4649 toc05 -20 0.01 DUAL SUPPLIES TA = -40°C 0.001 0.0001 40 0.00001 30 0 10 0.0001 -40 15 0 20 40 60 -40 80 -20 0 20 40 TEMPERATURE (°C) TEMPERATURE (°C) FREQUENCY RESPONSE TOTAL HARMONIC DISTORTION vs. FREQUENCY SUPPLY CURRENT vs. TEMPERATURE 100 V+ = +15V V- = -15V 10 CROSSTALK -70 1 0.1 SIGNAL DISTORTION 0.01 V+ = +15V 80 V- = -15V IN = 5V 60 I+ 50 40 -80 -90 -100 -110 90 70 I+ (µA) OFF-ISOLATION -60 DISTORTION (%) -40 80 100 5VRMS SIGNAL 600Ω SOURCE AND LOAD -30 60 MAX4649 toc09 ON-RESPONSE -20 -50 -20 VCOM (V) MAX4649 toc07 0 -10 5 MAX4649 toc08 RON (Ω) TA = -40°C 20 V+ = +15V 30 LOSS (dB) TA = +25°C 30 25 V+ = +24V 40 TA = +85°C ± RON (Ω) 70 V+ = +9V 90 50 MAX4649 toc02 A: V+ = +8V, V- = -8V B: V+ = +10V, V- = -10V C: V+ = +12V, V- = -12V D: V+ = +15V, V- = -15V E: V+ = +20V, V- = -20V 80 100 MAX4649 toc01 90 ON-RESISTANCE vs. VCOM AND TEMPERATURE MAX4649 toc03 ON-RESISTANCE vs. VCOM (DUAL SUPPLIES) 30 MEASUREMENT LIMITS 0.001 20 10 0.0001 0.1 1 10 FREQUENCY (MHz) 100 1000 10 100 1k FREQUENCY (Hz) 10k 100k -40 -15 10 35 60 TEMPERATURE (°C) 85 _______________________________________________________________________________________ 5 MAX4649 Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) CHARGE INJECTION vs. VCOM 100 10 A: V+ = +15V, V- = -15V B: V+ = +12V, V- = 0 30 CHARGE (pC) V+ = +15V V- = -15V 0.1 0.01 0.001 10 B A 0 -10 0.0001 -20 0.00001 -30 0.000001 -40 4.5 4.0 LOGIC THRESHOLD (V) 20 1 5.0 MAX4649 toc11 40 MAX4649 toc10 1000 LOGIC THRESHOLD vs. SUPPLY VOLTAGE MAX4649 toc12 SUPPLY CURRENT vs. LOGIC VOLTAGE I+ (µA) MAX4649 45Ω, SPDT Analog Switch in SOT23-8 3.5 3.0 2.5 2.0 1.5 1.0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0.5 0 -15 -10 -5 IN (V) 0 5 10 15 0 10 VCOM (V) 20 30 V+ (V) Pin Description PIN 1 NAME COM FUNCTION Analog Switch Common 2 NC 3 GND Normally Closed Switch Terminal. NC is connected to COM when IN is low. 4 V+ 5 N.C. 6 IN Digital Control Input 7 V- Negative Supply Voltage Input 8 NO Normally Open Switch Terminal. NO is connected to COM when IN is high. Ground Positive Supply Voltage Input No Connection Detailed Description The MAX4649 is a high-voltage, single-pole/doublethrow (SPDT) analog switch that operates from dual ±4.5V to ±20V supplies or from a single +9V to +36V supply. The MAX4649 has one normally closed (NC) switch and one normally open (NO) switch. CMOS switch construction allows bidirectional processing of rail-to-rail analog signals. The MAX4649 has break-before-make switching. The transition time for switching from one input to the other is typically 90ns. The off-leakage is typically less than 10pA, and on-leakage is typically less than 20pA. 6 Applications Information Overvoltage Protection 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, then V-, 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 supply pins (Figure 1). Adding diodes reduces the analog signal range to one diode drop below V+ and one diode drop above V-, but does not affect the device’s low switch resistance and low _______________________________________________________________________________________ 45Ω, SPDT Analog Switch in SOT23-8 Off-Isolation at High Frequencies In 50Ω systems, the high-frequency on-response of these parts extends from DC to above 300MHz, with a typical loss of -3.6dB. When the switch is turned off, Test Circuits/Timing Diagrams V+ D1 V+ NO_ COM Vg VD2 V- Figure 1. Overvoltage Protection MAX4649 +V LOGIC INPUT t R < 20ns t F < 20ns +3V 50% VNC 0 VNO t TRANS SWITCH OUTPUT t TRANS VNO VO 0.9V NO 0.9V NC NC V+ RL 1000Ω IN LOGIC INPUT VO COM NO GND CL 35pF V-V V NC CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 2. MAX4649 Transition Time _______________________________________________________________________________________ 7 MAX4649 however, it behaves like a capacitor, and off-isolation decreases with increasing frequency. This effect is more pronounced with higher source and load impedances. Above 5MHz, circuit board layout becomes critical. The graphs shown in the Typical Operating Characteristics were taken using a 50Ω source and load connected with BNC connectors. leakage characteristics. Device operation is unchanged, and the difference between V+ and V- should not exceed 44V. These protection diodes are not recommended when using a single supply. 45Ω, SPDT Analog Switch in SOT23-8 MAX4649 Test Circuits/Timing Diagrams (continued) V+ MAX4649 LOGIC INPUT V+ NC +3V +3V VOUT COM 50% 0 NO RL 300Ω IN LOGIC INPUT CL 35pF SWITCH OUTPUT (VOUT) GND 0.9 ✕ VOUT tD CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 3. MAX4649 Break-Before-Make Test Circuit V+ ∆VO MAX4649 V+ COM VO V GEN GND NC OR NO V- IN OFF ON OFF Q = (∆V O )(C L ) VVIN = +3V IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. Figure 4. Charge Injection 8 _______________________________________________________________________________________ VO CL 10nF 45Ω, SPDT Analog Switch in SOT23-8 MAX4649 V+ C V+ C SIGNAL GENERATOR MAX4649 V+ COM COM VIN IN ANALYZER IN V IN CAPACITANCE METER NC OR NO NC OR NO GND V- C RL f = 1MHz GND V- V- Figure 5. Off-Isolation Figure 7. Channel-Off Capacitance V+ C SIGNAL GENERATOR V+ C MAX4649 50Ω NC COM VIN C V- MAX4649 V+ COM CAPACITANCE METER IN IN V IN f = 1MHz NO ANALYZER NC OR NO GND V- RL C GND V- Figure 6. Crosstalk Between Switches V- C V- Figure 8. COM On-Capacitance Chip Information TRANSISTOR COUNT: 33 PROCESS TECHNOLOGY: CMOS _______________________________________________________________________________________ 9 MAX4649 Test Circuits/Timing Diagrams (continued) 45Ω, SPDT Analog Switch in SOT23-8 SOT23, 8L.EPS MAX4649 Package Information 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. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.