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MAX4507EAP+

hotMAX4507EAP+

MAX4507EAP+

For Reference Only

Part Number MAX4507EAP+
Manufacturer Maxim Integrated
Description IC SIGNAL LINE PROTECTOR 20-SSOP
Datasheet MAX4507EAP+Datasheet
Package 20-SSOP (0.209", 5.30mm Width)
In Stock 699 piece(s)
Unit Price $ 5.97 *
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MAX4507EAP+

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MAX4507EAP+Specifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - Specialized ICs
Datasheet MAX4507EAP+Datasheet
Package20-SSOP (0.209", 5.30mm Width)
Series-
TypeOvervoltage Protection
ApplicationsControl Systems
Mounting TypeSurface Mount
Package / Case20-SSOP (0.209", 5.30mm Width)
Supplier Device Package20-SSOP

MAX4507EAP+Datasheet

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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. General Description The MAX4506/MAX4507 multiple, two-terminal signal-line protectors are pin-compatible with the industry-standard MAX366/MAX367. These new circuit protectors feature fault-protected inputs and Rail-to-Rail® signal handling capability. The input pins are protected from overvoltage faults up to ±36V with power on or ±40V with power off. During a fault condition, the input terminal becomes an open circuit and only nanoamperes of leakage current flow from the source; but the switch output (OUT_) fur- nishes typically 19mA from the appropriate polarity sup- ply to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends. The MAX4506 contains three independent protectors while the MAX4507 contains eight independent protec- tors. They can protect both unipolar and bipolar analog signals using either unipolar (+9V to +36V) or bipolar (±8V to ±18V) power supplies. These devices have no logic control inputs; the protec- tors are designed to be always-on when the supplies are on. On-resistance is 100Ω max and matched within 7Ω, and on-leakage is less than 0.5nA at TA = +25°C. The MAX4506 is available in 8-pin SO/DIP packages. The MAX4507 is available in 20-pin SSOP and 18-pin SO/DIP packages. Applications Process-Control Systems Hot-Insertion Boards/Systems Data-Acquisition Systems Redundant/Backup Systems ATE Equipment Sensitive Instruments Features  Overvoltage Protection ±40V with Power Off ±36V with Power On  Open Signal Paths with Power Off  Output Clamps to Either Rail with an Input Overvoltage  Any On Channel Output is Not Affected by an Overvoltage to Any Other Channel  100Ω max On-Resistance  10ns Overvoltage Turn-On Delay  No Latchup During Power Sequencing  Rail-to-Rail Signal Handling  500Ω Output Clamp Resistance During Overvoltage M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors ________________________________________________________________ Maxim Integrated Products 1 OUT2 OUT3V- 1 2 8 7 V+ OUT1IN2 IN3 IN1 SO/DIP 3 4 6 5 MAX4506 TOP VIEW SWITCHED +15V MAX4506 IN3 V- -15V V+ +15V 3 4 5OUT3 IN22 6OUT2 IN11 7OUT1 8 P 100k OP AMP Typical Operating Circuit 19-1415; Rev 2; 2/03 PART MAX4506ESA MAX4506EPA MAX4506MJA -55°C to +125°C -40°C to +85°C -40°C to +85°C TEMP RANGE PIN-PACKAGE 8 SO 8 Plastic DIP 8 CERDIP** Ordering Information continued at end of data sheet. *Contact factory for dice specifications. **Contact factory for availability. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. Pin Configurations continued at end of data sheet. Pin Configurations Ordering Information MAX4506CPA 0°C to +70°C 8 Plastic DIP MAX4506C/D 0°C to +70°C Dice* MAX4506CSA 0°C to +70°C 8 SO

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M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (V+ = +15V, V- = -15V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) 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. (Voltages Referenced to GND) V+ ........................................................................-0.3V to +44.0V V- .........................................................................-44.0V to +0.3V V+ to V-................................................................-0.3V to +44.0V IN_ or OUT_ .........................................................................±44V IN_ Overvoltage with Power On...........................................±36V IN_ Overvoltage with Power Off...........................................±40V Continuous Current into Any Terminal..............................±30mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle).................................±70mA Continuous Power Dissipation (TA = +70°C) 8-Pin Narrow SO (derate 5.88mW/°C above +70°C) ....471mW 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C) ...........640mW 18-Pin Wide SO (derate 9.52mW/ °C above +70°C) .......762mW 18-Pin Plastic DIP (derate 11.11mW/ °C above +70°C) ...889mW 18-Pin CERDIP (derate 10.53mW/ °C above +70°C) ......842mW 20-Pin SSOP (derate 11.11mW/°C above +70°C) ...........640mW Operating Temperature Ranges MAX4506C_A /MAX4607C_ _.............................0°C to +70°C MAX4506E_A/MAX4607E_ _ ...........................-40°C to +85°C MAX4506MJA/MAX4607MJN ........................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10s) .................................+300°C RECOMMENDED OPERATING GUIDELINES V+ to GND..............................................................-0.3V to +40V V- to GND ...............................................................-32V to +0.3V V+ to V- ..................................................................................40V IN_........................................................................................±40V OUT_ ...............................................................................V+ to V- IN_ to OUT_..........................................................40V Differential Continuous Current into Any Terminal ..............................≤30mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle) .................................≤70mA CINInput Capacitance pF20VIN = 0, f = 1MHz +25°C VIN_ Fault-Protected Analog Signal Range V -36 +36(Notes 2, 3) C, E, MApplies with power on -1 0.1 +1 -40 +40 µA C, E, M -10 +10C, E +25°C VIN_= ±25V, VOUT_ = open Applies with power off IIN_ Input Signal-Path Leakage Current, Supplies On -10 +10 65 100 RON VV- V+VIN_ Fault-Free Analog Signal Range (Note 4) -400 +400 IOUT_ON Signal-Path Leakage Current (Note 7) µA -40 +40 nA -0.5 +0.5 12 125 Ω 150 Analog Signal-Path Resistance Ω 1 7 ∆RON Signal-Path Resistance Match (Note 6) 10 UNITSMIN TYP MAXSYMBOLPARAMETER V+ = +15V, V- = -15V, VIN_ = ±15V VOUT_ = ±10V, VIN_ = ±10V or floating VIN_ = ±10V, IOUT_ = 1mA VIN_ = VOUT_ = ±10V, IOUT = 1mA CONDITIONS +25°C C, E, M M C, E +25°C M C, E M +25°C C, E M TA ANALOG SWITCH FAULT PROTECTION Note 1: OUT_ pins are not fault protected. Signals on OUT_ exceeding V+ or V- are clamped by internal diodes. Limit forward-diode current to maximum current rating. Note 2: IN_ pins are fault protected. Signals on IN_ exceeding -36V to +36V may damage the device. These limits apply with power applied to V+ or V-, or ±40V with V+ = V- = 0.

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µA M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS—Single Supply (V+ = +12V, V- = -0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) ELECTRICAL CHARACTERISTICS —Dual Supplies (continued) (V+ = +15V, V- = -15V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) MAX4506 MAX4507 -1 0.2 +1 -400 -300 MAX4506 MAX4507 400 -250 -160 Power-Supply Current 300 -200 160 250 200 175 -175 µA 90 150 -150 -90 I- I+ VIN_ = +15V M C, E +25°C M C, E +25°C µA -10 +10C, E +25°C VIN_= ±40V, VOUT_ = open, V+ = 0, V- = 0 IIN_ Input Signal-Path Leakage Current, Supplies Off -10 +10M µA 13 19 26 mA -26 -19 -13+25°C +25°CVIN_= +25V IOUT_ Output Clamp Current, Supplies On 0.5 1.0 kΩ 0.4 1.0+25°C +25°C UNITSMIN TYP MAXSYMBOLPARAMETER IOUT = 1mAROUT_ Output Clamp Resistance, Supplies On VIN_= -25V VIN_= +25V VIN_= -25V ±8 ±18C, E, M +25°C ns ± Fault Output Turn-On Delay Time (Note 5) RL = 10kΩ, VIN_ = ±25V Power-Supply Range CONDITIONS V+, V- M C, E +25°C M C, E +25°C TA 2.5 V 10 µs+25°C± Fault Recovery Time (Note 5) RL = 10kΩ, VIN_ = ±25V 125 200 RON V0 V+VIN_ Fault-Free Analog Signal Range (Note 4) 20 ∆RON Signal-Path Resistance Match (Note 6) 15 Ω 3 12 250 Ω 300 Analog Signal-Path Resistance UNITSMIN TYP MAXSYMBOLPARAMETER V+ = +12V, V- = 0 VIN_ = +12V VIN_ = +10V, IOUT_ = 1mA VIN_ = +10V, IOUT_ = 1mA CONDITIONS +25°C C, E, M M C, E +25°C C, E M TA POWER SUPPLY -400 +400 IOUT_(ON) Signal-Path Leakage Current (Note 7) -40 +40 nA -0.5 0.05 +0.5 VIN = +10V or floating M C, E +25°C ANALOG SWITCH

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M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS—Single Supply (continued) (V+ = +12V, V- = -0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) RL = 10kΩ, VIN_ = +25V± Fault Recovery Time (Note 5) +25°C µs 10 V 2.5 TA M V+ CONDITIONS Power-Supply Range RL = 10kΩ, VIN_ = +25V ± Fault Output Turn-On Delay Time (Note 5) ns+25°C C, E, M +9 +36 VIN_= 25V PARAMETER SYMBOL MIN TYP MAX UNITS Output Clamp Current, Supply On IOUT_ +25°C 3 5.5 10 mA µA µA M -10 +10 Input Signal-Path Leakage Current, Supply Off (Note 9) IIN_ -10 +10 VIN_= ±40V +25°C Input Signal-Path Leakage Current, Supply On (Note 9) IIN_ C, E -10 +10 µA +25°C C, E M +25°C C, E M VIN_ = +12VI+ 9 25 µA 30 40 17 40 60 Power-Supply Current 80 MAX4507 MAX4506 Applies with power off VIN_= ±25V, VOUT_ = 0 +25°C C, E -10 +10 C, E, M µA -40 +40 -1 0.2 +1 -1 0.2 +1 Applies with power on C, E, M -36 +36 V Fault-Protected Analog Signal Range (Notes 4, 5, 9) VIN_ VIN_= ±25V Output Clamp Resistance, Supply On ROUT_ +25°C 1.0 2.5 kΩ Note 3: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 4: See Fault-Free Analog Signal Range vs. Supply Voltages graph in the Typical Operating Characteristics. Note 5: Guaranteed by design. Note 6: ∆RON = RON(MAX) - RON(MIN) Note 7: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at TA = +25°C. Note 8: Leakage testing for single-supply operation is guaranteed by testing with dual supplies. Note 9: Guaranteed by testing with dual supplies. POWER SUPPLY FAULT PROTECTION

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M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors _______________________________________________________________________________________ 5 0 20 60 40 100 120 80 140 -20 -10 -5-15 0 5 10 15 20 ON-RESISTANCE vs. OUTPUT VOLTAGE (DUAL SUPPLIES) M A X 4 5 0 6 /0 7 t o c0 1 VOUT_ (V) R O N ( Ω ) V+ = +18V V- = -18V V+ = +15V V- = -15V V+ = +10V V- = -10V V+ = +8V V- = -8V 0 50 150 100 200 250 0 10 155 20 25 30 35 ON-RESISTANCE vs. OUTPUT VOLTAGE (SINGLE SUPPLY) M A X 4 5 0 6 /0 7 t o c0 2 VOUT_ (V) R O N ( Ω ) V+ = +12V V+ = +9V V+ = +20V V+ = +30V V+ = +36V V- = 0V 20 0 40 80 60 100 120 -15 -5 0-10 5 10 15 ON-RESISTANCE vs. OUTPUT VOLTAGE AND TEMPERATURE (DUAL SUPPLIES) M A X 4 5 0 6 /0 7 t o c0 3 VOUT_ (V) R O N ( Ω ) V+ = +15V V- = -15V TA = +125°C TA = +85°C TA = +70°C TA = +25°C TA = -40°C TA = -55°C 0 50 150 100 200 250 0 4 62 8 10 12 ON-RESISTANCE vs. OUTPUT VOLTAGE AND TEMPERATURE (SINGLE SUPPLY) M A X 4 5 0 6 /0 7 t o c0 4 VOUT_ (V) R O N ( Ω ) TA = +125°C TA = +85°C TA = +70°C TA = +25°CTA = -40°C TA = -55°C V+ = +12V V- = 0 -20 -15 -10 -5 0 5 10 15 20 -30 -10-20 0 10 20 30 OUTPUT TRANSFER CHARACTERISTICS (DUAL SUPPLIES) M A X 4 5 0 6 /0 7 t o c0 7 INPUT VOLTAGE (V) O U TP U T C LA M P V O LT A G E (V ) (V+ = +18V, V- = -18V) (V+ = +15V, V- = -15V) (V+ = +10V, V- = -10V) (V+ = +8V, V- = -8V) (V+ = +8V, V- = -8V) (V+ = +10V, V- = -10V) (V+ = +15V, V- = -15V) (V+ = +18V, V- = -18V) OUTPUT LOAD = 1MΩ INPUT VOLTAGE LINEARLY SWEPT BETWEEN -30V AND +30V 0 0.2 0.1 0.5 0.4 0.3 0.7 0.6 0.8 -55 -5 25-35 -15 45 65 85 105 125 OUTPUT CLAMP RESISTANCE SUPPLIES ON M A X 4 5 0 6 /0 7 t o c0 5 TEMPERATURE (°C) R O U T (k Ω ) V+ = +15V V- = -15V VIN = ±25V VIN = +25V VIN = -25V -25 -15 -20 0 -5 -10 5 10 20 15 25 -55 -25 -10-40 5 20 35 50 65 80 95 110 125 OUTPUT CLAMP CURRENT SUPPLIES ON vs. TEMPERATURE M A X 4 5 0 6 /0 7 t o c0 6 TEMPERATURE (°C) I O U T (m A ) V+ = +15V V- = -15V 0 5 10 15 20 25 30 35 40 0 105 15 20 25 30 35 40 OUTPUT TRANSFER CHARACTERISTICS (SINGLE SUPPLY) M A X 4 5 0 6 /0 7 t o c0 8 INPUT VOLTAGE (V) O U TP U T C LA M P V O LT A G E (V ) INPUT VOLTAGE LINEARLY SWEPT BETWEEN 0 AND 35V OUTPUT LOAD = 1MΩ V- = 0 V+ = +9V V+ = +25V V+ = +36V V+ = +15V V+ = +12V -20 -15 -10 -5 0 5 10 15 20 -20 -10-15 -5 0 5 10 15 20 FAULT-FREE ANALOG SIGNAL RANGE vs. SUPPLY VOLTAGE M A X 4 5 0 6 /0 7 t o c0 9 INPUT VOLTAGE (V) O U TP U T V O LT A G E (V ) Typical Operating Characteristics (TA = +25°C, unless otherwise noted.)

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M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) 0.01p 0.1p 10p 1p 1n 10n 100p 100n -55 -5 20-30 45 70 95 120 145 FAULT-FREE OUTPUT LEAKAGE CURRENT WITH SUPPLIES ON M A X 4 5 5 0 6 /0 7 t o c1 0 TEMPERATURE (°C) LE A K A G E C U R R EN T (A ) VOUT = ±10υ IOUT (V+ = +15V, V- = -15V) IOUT (V+ = +12V, V- = 0) 0.1p 1p 100p 10p 10n 100n 1n 1µ -55 -15 5-35 25 45 65 85 105 125 INPUT FAULT LEAKAGE CURRENT WITH SUPPLIES ON M A X 4 5 5 0 6 /0 7 t o c1 1 TEMPERATURE (°C) LE A K A G E C U R R EN T (A ) IIN AT +25V (V+ = +12V, V - = 0) IIN AT +25V (V+ = +15V, V- = -15V) 50 -50 0 25 -25 125 -125 100 -100 75 -75 150 -150 -55 -15 5-35 25 45 65 85 105 125 MAX4506 POWER-SUPPLY CURRENT vs. TEMPERATURE M A X 4 5 5 0 6 /0 7 t o c1 2 TEMPERATURE (°C) S U P P LY C U R R EN T (µ A ) V+ = +15V V- = -15V I+ I- I+ SINGLE SUPPLY +12V 50 -50 0 100 -100 150 -150 -200 200 -250 250 -55 -15 5-35 25 45 65 85 105 125 MAX4507 POWER-SUPPLY CURRENT vs. TEMPERATURE M A X 4 5 5 0 6 /0 7 t o c1 3 TEMPERATURE (°C) S U P P LY C U R R EN T (µ A ) V+ = +15V V- = -15VI+ I- I+ SINGLE SUPPLY + 12V 20 -20 0 40 -40 60 -60 -80 80 -100 100 -15 5 010 5 10 15 SUPPLY CURRENT vs. INPUT VOLTAGE M A X 4 5 5 0 6 /0 7 t o c1 4 INPUT VOLTAGE (V) S U P P LY C U R R EN T (µ A ) I+ I- 10 -100 0.01 1 100.1 1000100 FREQUENCY RESPONSE -90 M A X 4 5 0 6 /0 7 t o c1 5 FREQUENCY (MHz) R ES P O N S E (d B ) -80 -70 -60 -50 -40 -30 -20 -10 0 V+ = +15V V- = -15V CROSSTALK BANDWIDTH IN_ 10V/div +15V -15V +15V 0V -15V 10V/div OUT_ 5µs/div FAULT-FREE SIGNAL PERFORMANCE MAX45506/07 toc16 FAULT-FREE RAIL-TO-RAIL SIGNAL HANDLING WITH ±15V SUPPLIES IN_ +25V 0V +15V 0V -25V -15V ±25V OVERVOLTAGE INPUT WITH THE OUTPUT CLAMPED AT ±15V 0V OUT_ 5µs/div INPUT OVERVOLTAGE vs. OUTPUT CLAMPING MAX45506/07 toc17 IN_ 5V/div 0V +16V +15V 0V OUT_ 5V/div 5µs/div FAULT RECOVERY MAX45506/07 toc18 V+ = +15V V- = -15V

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M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors _______________________________________________________________________________________ 7 8-Pin DIP/SO 18-Pin DIP/SO NAME* 1, 2, 3 1, 2, 3 IN1, IN2, IN3 PIN — 4–8 IN4, IN5, IN6, IN7, IN8 4 9 V- — — N.C. 8 18 V+ 5, 6, 7 15, 16, 17 OUT3, OUT2, OUT1 — 10–14 OUT8, OUT7, OUT6, OUT5, OUT4 Pin Description FUNCTION Signal Inputs 1, 2, 3 Signal Inputs 4, 5, 6, 7, 8 Negative Supply Voltage Input No Connection. Not internally connected. Positive Supply-Voltage Input Signal Outputs 3, 2, 1 Signal Outputs 8, 7, 6, 5, 4 20-Pin SSOP 1, 2, 4 5–9 10 3, 18 20 16, 17, 19 11–15 MAX4506 MAX4507 * Connect all unused inputs to a hard voltage within the supply range (e.g., V+, V-, or GND). Detailed Description The MAX4506/MAX4507 protect other ICs from over- voltage by clamping its output voltage to the supply rails. If the power supplies to the device are off, the device clamps the output to 0V. The MAX4506/ MAX4507 provide protection for input signals up to ±36V with the power supplies on and ±40V with the power supplies off. The MAX4506/MAX4507 protect other integrated cir- cuits connected to its output from latching up. Latchup is caused by parasitic SCR(s) within the IC turning on, and can occur when the supply voltage applied to the IC exceeds the specified operating range. Latchup can also occur when signal voltage is applied before the power-supply voltage. When in a latchup state, the cir- cuit draws excessive current and may continue to draw excessive current even after the overvoltage condition is removed. A continuous latchup condition may dam- age the device permanently. Such “faults” are com- monly encountered in modular control systems where power supplies to interconnected modules may be interrupted and reestablished at random. Faults can happen during production testing, maintenance, start- up, or a power failure. Figure 1 shows the normal complementary pair (N1 and P1) found in many common analog switches. In addi- tion to these transistors, the MAX4506/MAX4507 also contain comparators and sensing and clamping circuitry to control the state of N1 and P1. During normal opera- tion, N1 and P1 remain on with a typical 65Ω on-resis- tance between IN and OUT. The on-board comparators and sensing circuitry moni- tor the input voltage for possible overvoltage faults. -15V -15V +15V P-CHANNEL DRIVER N-CHANNEL DRIVER +15V N3 P3 IN N1 CLAMP OUT CLAMP +V(+15V) -V(-15V) N2 P2 P1 COMPARATOR COMPARATOR SENSE SWITCH SENSE SWITCH Figure 1. Simplified Internal Structure

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M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors 8 _______________________________________________________________________________________ Two clamp circuits limit the output voltage to within the supply voltages. When the power supplies are off, any input voltage applied at IN turns off both N1 and P1, and OUT is clamped to 0V. Normal Operation When power is applied, each protector acts as a resis- tor in series with the signal path. Any voltage source on the “input” side of the switch will be conducted through the protector to the output (Figure 2). When the output load is resistive, it draws current through the protector. The internal resistance is typically less than 100Ω. High-impedance loads are relatively unaffected by the presence of the MAX4506/MAX4507. The protector’s path resistance is a function of the supply voltage and the signal voltage (see Typical Operating Characteristics). Fault Protection, Power Off When power is off (i.e., V+ = V- = 0), the protector is a virtual open circuit. With up to ±40V applied to the input pin, the output pin will be 0V. Fault Protection, Power On A fault condition exists when the voltage on the IN_ exceeds either supply rail. This definition is valid when power is on or off, as well as during all states while power ramps up or down. Applications Information Supplying Power Through External ICs The MAX4506/MAX4507 have low supply currents (<250µA), which allows the supply pins to be driven by other active circuitry instead of connected directly to the power sources. In this configuration, the parts can be used as driven fault-protected switches with V+ or V- used as the control pins. For example, with the V- pin grounded, the output of a CMOS gate can drive the V+ pin to turn the device on and off. This can effectively connect and disconnect three (MAX4506) or eight (MAX4507) separate signal lines at once. Ensure that the driving source(s) does not drive the V+ pin more negative than the V- pin. Figure 3 shows a simple turn-on delay that takes advantage of the MAX4506’s low power consumption. The two RC networks cause gradual application of power to the MAX4506, which in turn applies the input signals smoothly after the amplifier has stabilized. The two diodes discharge the two capacitors rapidly when the power turns off. Note that the IC used to supply power to the MAX4506/MAX4507 must be able to sup- ply enough current to maintain the load voltage at the supply rail in a fault condition. MAX4506 ROUT VIN IN1 V- V- V+V+ 1 4 7 8 OUT1 Figure 2. Application Circuit MAX4506 IN3 V- -15V V+ +15V 3 4 5 10µF 10µF OUT3 IN22 6OUT2 IN11 7OUT1 8 100kΩ 100kΩ OP AMP Figure 3. Turn-On Delay

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M A X 4 5 0 6 /M A X 4 5 0 7 Fault-Protected, High-Voltage Signal-Line Protectors _______________________________________________________________________________________ 9 Protectors as Circuit Elements Each of the protectors in a MAX4506/MAX4507 may be used as a switched resistor, independent of the func- tions of other elements in the same package. For exam- ple, Figure 4 shows a MAX4506 with two of the protectors used to protect the input of an op amp, and the third element used to sequence a power supply. Combining the circuits of Figures 3 and 4 produces a delayed action on the switched +15V, as well as smooth application of signals to the amplifier input. Figure 5 shows MAX4506 used in front of a MAX338 unprotected 1-to-8 multiplexer. With supplies at ±15V, VOUT of the MAX4506 clamps to ±15V; VOUT of the MAX338 goes to ±14V. With supplies off, VOUT goes to 0V while the inputs remain at ±25V. Use the MAX4506 with a MAX338 to enhance voltage handling capability (Figure 6). The MAX4506 and MAX338 share almost equal voltage drops in this con- figuration. For example, applying ±40V on pins 1 and 2 of the MAX4506 causes a voltage drop of about 26V across pin 1 of the MAX4506 to pin 4 of the MAX338, and a voltage drop of about 28V across pin 4 of the MAX4506 to pin 8 of the MAX338. Similarly, there is a 26V drop from pin 2 of the MAX4506 to pin 5 of the MAX338. The system’s performance exceeds each individual part’s specification because of shared volt- age drops. Multiplexer and Demultiplexer As shown in Figure 7, the MAX4506 can be used in series with the output of a MAX4508 (1-to-8 multiplexer) to act as multiplexer or demultiplexer. The MAX4508 is a fault-protected multiplexer whose inputs are designed to interface with harsh environments; however, its common output is not fault protected if connected to outside sig- nals (i.e., demultiplexer use). If the common output can see fault signals, then it needs to be protected, and the MAX4506 can be added to provide complete protection. SWITCHED +15V MAX4506 IN3 V- -15V V+ +15V 3 4 5OUT3 IN22 6OUT2 IN11 7OUT1 8 P 100kΩ OP AMP 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 MAX338 -15V 1 2 8 7 +15V RL -25V +25V 3 4 6 5 MAX4506 A1 A2 GND V+ NO5 NO6 NO7 NO9 AO EN V- OV +5V +3V +15V -5V NO3 NO1 NO2 NO4 VOUT Figure 4. Power-Supply Sequencing 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 MAX4508 -15V 1 2 8 7 +15V NEW COM 3 4 6 5 MAX4506 A1 A2 GND V+ NO5 NO6 NO7 NO9 AO EN V- O +5V +3V +15V -15V NO3 NO1 NO2 NO4 COM Figure 7. Multiplexer and Demultiplexer Application Using MAX4506 (or MAX4507) with MAX4508 VOUT = -14V +40V -40V 10kΩ 6 471 52 8 MAX338MAX4506 Figure 6. SPDT Switch Application Figure 5. Protecting a MAX338 with a MAX4506

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Vivi***** Pall

January 16, 2020

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January 11, 2020

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January 9, 2020

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December 7, 2019

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November 18, 2019

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November 9, 2019

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November 7, 2019

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November 2, 2019

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October 8, 2019

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September 21, 2019

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