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19-1542; Rev 0; 10/99
Rail-to-Rail, Fault-Protected, SPST Analog Switches
General Description
The MAX4510/MAX4520 single-pole/single-throw (SPST), fault-protected analog switches feature a fault-protected input and Rail-to-Rail(R) signal-handling capability. The normally open (NO) and normally closed (NC) terminals are protected from overvoltage faults up to 36V during power-on and 44V with power off. During a fault condition, the switch input terminal (NO or NC) becomes an open circuit; only nanoamperes of leakage current flow from the fault source, and the switch output (COM) furnishes up to 13mA of the appropriate polarity supply voltage to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends. On-resistance is 160 max. The off-leakage current is only 0.5nA at +25C and 10nA at +85C. The MAX4510 is a normally closed switch, while the MAX4520 is a normally open switch. These CMOS switches operate with dual power supplies ranging from 4.5V to 20V or a single supply between +9V and +36V. The digital input has +0.8V and +2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using 15V or a single +12V supply. The MAX4510/ MAX4520 are available in 6-pin SOT23 and 8-pin MAX packages.
Features
o 40V Fault Protection with Power Off 36V Fault Protection with 15V Supplies o Switch is Off with Power Removed o Rail-to-Rail Signal Handling o 160 max Signal Paths with 15V Supplies o On-Switch Turns Off with Overvoltage o 0.5nA Off-Leakage Current o Output Clamped to Appropriate Supply Voltage During Fault Condition; No Transition Glitch o No Power-Supply Sequencing Required o 4.5V to 20V Dual Supplies +9V to +36V Single Supply o Low Power Consumption: <2mW o TTL- and CMOS-Compatible Logic Inputs with Single +9V to +15V or 15V Supplies
MAX4510/MAX4520
Pin Configurations/Truth Tables Applications
Data Acquisition Industrial and Process-Control Systems Avionics ATE Equipment Redundant/Backup Systems
V2 V+ 1 6 NC (NO) TOP VIEW
MAX4510 MAX4520
5
COM
IN
3
4
GND
Ordering Information
( ) ARE FOR MAX4520.
SOT23
PART
TEMP. RANGE
PINPACKAGE 6 SOT23-6 8 MAX 6 SOT23-6 8 MAX
TOP MARK AABZ -- AADK --
SWITCHES SHOWN FOR LOGIC "0" INPUT. ALL SWITCHES ARE OFF WITH POWER REMOVED. IN 0 1 MAX4510 ON OFF MAX4520 OFF ON
MAX4510EUT-T -40C to +85C MAX4510EUA MAX4520EUA -40C to +85C -40C to +85C MAX4520EUT-T -40C to +85C
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations continued at end of data sheet. 1
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX4510/MAX4520
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 COM, IN (Note 1)..................................(V- - 0.3V) to (V+ + 0.3V) NC, NO (Note 2) .....................................(V+ - 36V) to (V- + 36V) NC, NO to COM.......................................................-36V to +36V Continuous Current into Any Terminal..............................30mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle)...................................50mA Continuous Power Dissipation (TA = +70C) (Note 2) 6-Pin SOT23-6 (derate 7.1mW/C above +70C) .........696mW 8-Pin MAX (derate 4.10mW/C above +70C) ............330mW Operating Temperature Ranges MAX45_0EUT....................................................-40C to +85C MAX45_0EUA ...................................................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: COM and IN pins are not fault protected. Signals on COM or IN exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum current rating. Note 2: NC and NO pins are fault protected. Signals on NC or NO exceeding -36V to +36V may damage the device. These limits apply with power applied to V+ or V-, or 40V with V+ = V- = 0.
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 Supplies
(V+ = +15V, V- = -15V, GND = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA =
+25C.) (Note 3) PARAMETER ANALOG SWITCH Fault-Free Analog Signal Range On-Resistance NO or NC Off-Leakage Current (Notes 4, 5) COM Off-Leakage Current (Notes 4, 5) COM On-Leakage Current (Notes 4, 5) VNO, VNC RON INO(OFF), INC(OFF) ICOM(OFF) ICOM(ON) Applies with power on or off VCOM = 10V, ICOM = 1mA VCOM = 14V; - VNO, VCOM = +14V VCOM = 14V; - VNO, VNC = +14V VCOM = 14V; VNO, VNC = 14V or unconnected Applies with power on (Note 6) Applies with power off (Note 6) VNO or VNC = 36V VNO or VNC = 36V, - VCOM = +10V VNO or VNC = 40V, V+ = 0, V- = 0 VNO or VNC = 36V VNO or VNC = -36V E +25C E +25C E +25C E +25C E -0.5 -10 -0.5 -10 -0.5 -20 -36 -40 -10 -200 -20 -200 -20 -200 8 -12 11 -10 0.1 0.01 0.01 0.01 V125 V+ 160 225 0.5 10 0.5 10 0.5 20 36 40 10 200 20 200 20 200 13 -7 V nA nA nA SYMBOL CONDITIONS TA MIN TYP MAX UNITS
FAULT (V+ = +15V, V- = -15V, unless otherwise noted.) Fault-Protected Analog Signal Range COM Off-Leakage Current, Supplies On NO or NC Input Leakage Current, Supplies On NO or NC Input Leakage Current, Supplies Off Clamp Output Current, Supplies On VNO, VNC ICOM(OFF) INO, INC INO, INC ICOM E +25C E +25C E +25C E +25C V nA nA nA mA
2
_______________________________________________________________________________________
Rail-to-Rail, Fault-Protected, SPST Analog Switches
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, GND = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA =
+25C.) (Note 3) PARAMETER Clamp Output Resistance, Supplies On Fault Trip Threshold Fault Output Turn-On Delay Time Fault Recovery Time LOGIC INPUT IN Input Logic High IN Input Logic Low IN Input Current VINH VINL IINH, IINL VIN = 0.8V or 2.4V E E +25C E +25C E +25C E +25C +25C +25C +25C +25C 1.5 10 5 10 -62 60 -1 -5 350 0.03 2.4 0.8 1 5 500 600 175 250 5 V V A VIN = 25V, RL = 10k VIN = 25V, RL = 10k SYMBOL RCOM CONDITIONS VNO or VNC = 36V TA +25C E +25C +25C +25C V- - 0.4 10 2.5 MIN TYP 1 MAX 2.5 3 V+ + 0.4 UNITS k V ns s
MAX4510/MAX4520
SWITCH DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Charge Injection (Note 7) NO or NC Off-Capacitance COM Off-Capacitance COM On-Capacitance Off-Isolation (Note 8) POWER SUPPLY Power-Supply Range V+ Supply Current V- Supply Current V+, VI+ IVIN = 0 or 5V VIN = 0 or 5V VIN = 0 or 15V GND Supply Current IGND VIN = 5V E +25C E +25C E +25C E +25C E 50 -1 0.01 50 4.5 100 20 175 250 100 175 1 10 100 175 A V A A tON tOFF Q CN(OFF) CCOM(OFF) CCOM(ON) VCISO VNO or VNC = 10V, RL = 2k, CL = 35pF, Figure 2 VNO or VNC = 10V, RL = 2k, CL = 35pF, Figure 2 CL = 1nF, VNO = 0, RS = 0, Figure 3 f = 1MHz, Figure 4 f = 1MHz, Figure 4 f = 1MHz, Figure 4 RL = 50, CL = 15pF, VN_ = 1VRMS, f = 1MHz, Figure 5 ns ns pC pF pF pF dB
_______________________________________________________________________________________
3
Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX4510/MAX4520
ELECTRICAL CHARACTERISTICS--Single +12V Supply
(V+ = +12V, V- = 0, GND = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 3) PARAMETER ANALOG SWITCH Fault-Free Analog Signal Range On-Resistance NO or NC Off-Leakage Current (Notes 4, 5, 9) COM Off-Leakage Current (Notes 4, 5, 9) COM On-Leakage Current (Notes 4, 5, 9) FAULT Fault-Protected Analog Signal Range COM Off-Leakage Current, Supply On NO or NC Input Leakage Current, Supply On NO or NC Input Leakage Current, Supply Off Clamp Output Current, Supply On Clamp Output Resistance, Supply On LOGIC INPUT IN Input Logic High IN Input Logic Low IN Input Current VINH VINL IINH, IINL VIN = 0.8V or 2.4V E E +25C E -1 -5 0.03 2.4 0.8 1 5 V V A VNO, VNC ICOM INO, INC INO, INC ICOM RCOM Applies with power on (Note 6) Applies with power off (Note 6) VNO or VNC = 36V VNO or VNC = 36V, VCOM = 0 VNO or VNC = 40V, V+ = 0, V- = 0 VNO or VNC = 36V VNO or VNC = 36V E +25C E +25C E +25C E +25C +25C -36 -40 -10 -200 -20 -200 -20 -200 2 3 2.4 0.1 36 40 10 200 20 200 20 200 5 5 V nA nA nA mA k VNO, VNC RON INO(OFF), INC(OFF) ICOM(OFF) ICOM(ON) Applies with power on or off VCOM = 10V, ICOM = 1mA VCOM = 10V, 1V; VNO, VNC = 1V, 10V VCOM = 1V, 10V; VNO, VNC = 10V, 1V VCOM = 1V, 10V; VNO, VNC = 1V, 10V, or unconnected E +25C E +25C E +25C E +25C E -0.5 -10 -0.5 -10 -0.5 -20 0.01 0.01 0.01 0 260 V+ 390 500 0.5 10 0.5 10 0.5 20 V nA nA nA SYMBOL CONDITIONS TA MIN TYP MAX UNITS
4
_______________________________________________________________________________________
Rail-to-Rail, Fault-Protected, SPST Analog Switches
ELECTRICAL CHARACTERISTICS--Single +12V Supply (continued)
(V+ = +12V, V- = 0, GND = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 3) PARAMETER SYMBOL CONDITIONS VNO or VNC = 7V, RL = 2k, CL = 35pF, Figure 2 VNO or VNC = 7V, RL = 2k, CL = 35pF, Figure 2 CL = 1nF, VNO = 0, RS = 0, Figure 3 f = 1MHz, Figure 4 VCOM = 0, f = 1MHz, Figure 4 VCOM = VNO = 0, f = 1MHz, Figure 4 RL = 50, CL = 15pF, VIN = 1VRMS, f = 1MHz, Figure 5 TA +25C E +25C E +25C +25C +25C +25C +25C 1 9 9 22 -62 60 MIN TYP 500 MAX 750 1000 200 300 5 UNITS SWITCH DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Charge Injection (Note 7) NO or NC Off-Capacitance COM Off-Capacitance COM On-Capacitance Off-Isolation (Note 8) POWER SUPPLY Power-Supply Range V+ Supply Current V+ I+ VIN = 0 or 5V VIN = 0 or 12V V- and GND Supply Current IGND VIN = 0 or 5V Note 3: Note 4: Note 5: Note 6: Note 7: Note 8: Note 9: E +25C E +25C E +25C E 50 25 9 50 36 125 175 75 125 125 175 V A A A tON tOFF Q CNO(OFF), CNC(OFF) CCOM(OFF) CCOM(ON) VISO ns ns pC pF pF pF dB
MAX4510/MAX4520
Algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at TA = +25C. SOT packages are 100% tested at +25C. Limits at the maximum-rated temperature are guaranteed by design and correlation limits at +25C. Leakage tests for the SOT package are typical only. NC and NO pins are fault protected. Signals on NC or NO exceeding -36V to +36V may damage the device. These limits apply with power applied to V+ or V-, or 40V with V+ = V- = 0. Guaranteed by design. Off isolation = 20log10 [ VCOM / (VNC or VNO) ], VCOM = output, VNC or VNO = input to off switch. Leakage testing for single-supply operation is guaranteed by testing with dual supplies.
_______________________________________________________________________________________
5
Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX4510/MAX4520
__________________________________________Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
SWITCH ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
300 SWITCH ON-RESISTANCE () 250 200 150 100 50 0 -20 -15 -10 -5 0 VCOM (V) 5 10 15 20 V+ = +15V V- = -15V V+ = +20V V- = -20V V+ = +10V V- = -10V V+ = +5V V- = -5V V+ = +12V V- = -12V
MAX4510-01
SWITCH ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX4510-02
SWITCH ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
V+ = +5V V+ = +12V V+ = +15V V+ = +20V 10 V+ = +24V V+ = +30V V+ = +36V
MAX4510-03
350
200 180 SWITCH ON-RESISTANCE () 160 140 120 100 80 60 40 20 0 -15 -10 -5 0 VCOM (V) 5 10 V+ = +15V V- = -15V TA = -55C TA = -40C TA = +25C TA = +125C TA = +85C
1000
SWITCH ON-RESISTANCE () 15
1 0 5 10 15 20 25 VCOM (V) 30 35 40
SWITCH ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX4510-04
ID(ON), IS(OFF), AND ID(OFF) LEAKAGES vs. TEMPERATURE
MAX4510-05
CHARGE INJECTION vs. VCOM (DUAL SUPPLIES)
12 10 Q (pC) 8 6 4 2 0 SINGLE +12V SUPPLY DUAL 15V SUPPLIES V+ = +15V V- = -15V
MAX4510-06
400 350 SWITCH ON-RESISTANCE () 300 TA = +125C TA = +85C
100n ICOM(OFF) AT VNO = -14V, VCOM = +14V ICOM(OFF) AT VNO = +14V, VCOM = -14V 1n ICOM(ON) AT VNO = VCOM = -14V
14
10n LEAKAGE (A) TA = +25C TA = -40C
250 200 150 100 50 V+ = +12V 0 0 2
100p
ICOM(ON) AT VNO = VCOM = +14V INO(OFF) AT VNO = -14V, VCOM = +14V INO(OFF) AT VNO = +14V, VCOM = -14V
TA = -55C 10p
1p 4 6 VCOM (V) 8 10 12 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
-15
-10
-5
0 VCOM (V)
5
10
15
ON- AND OFF-TIMES vs. SUPPLY VOLTAGE
MAX4510-07
ON- AND OFF-TIMES vs. TEMPERATURE
MAX4510-08
POWER-SUPPLY CURRENT vs. TEMPERATURE
V+ = +15V V- = -15V VIN = +5V
MAX4510/20 toc 09
1000 900 800 700 tON, tOFF (ns) 600 500 400 300 200 100 0 0 5 10 15 tOFF (DUAL SUPPLIES) tOFF (SINGLE SUPPLY) tON (DUAL SUPPLIES) tON (SINGLE SUPPLY)
600 500 400 300 200 tOFF 100 0
200 150 SUPPLY CURRENT (A) 100 IGND 50 0 -50 I-100 -150 I+
tON
20
tON, tOFF (ns)
-50
-25
0
25
50
75
100
125
-40
-20
0
20
40
60
80
100
SUPPLY VOLTAGE (V)
TEMPERATURE (C)
TEMPERATURE (C)
6
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Rail-to-Rail, Fault-Protected, SPST Analog Switches
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
MAX4510/MAX4520
LOGIC-LEVEL THRESHOLD vs. V+
MAX4511-10
FREQUENCY RESPONSE
-10 -20 -30 -40 -50 -60 -70 -80 -90 -100
LOGIC-LEVEL THRESHOLD (V)
2.5 2.0
ON LOSS
LOSS (dB)
1.5 1.0 0.5 0 0 5 10 15 20 25 30 35 V+ (V)
F OF
LO
SS
V+ = +15V V- = -15V
0.01 0.1 1 10 100 1000
-110 FREQUENCY (MHz)
Pin Description
PIN SOT23-6 1 MAX 8 NAME V+ FUNCTION Positive Supply Voltage Input Negative Supply Voltage Input. Connect to GND for single-supply operation. Logic Control Digital Input Ground Analog Switch Common Terminal
Detailed Description
Overview of Traditional Fault-Protected Switches
The MAX4510/MAX4520 are fault-protected CMOS analog switches with unusual operation and construction. Traditional fault-protected switches are constructed by three series FETs. This produces good off characteristics, but fairly high on-resistance when the signals are within about 3V of each supply rail. As the voltage on one side of the switch approaches within about 3V of either supply rail (a fault condition), the switch impedance becomes higher, limiting the output signal range (on the protected side of the switch) to approximately 3V less than the appropriate polarity supply voltage. During a fault condition, the output current that flows from the protected side of the switch into its load comes from the fault source on the other side of the switch. If the switch is open or the load is extremely high impedance, the input current will be very low. If the switch is on and the load is low impedance, enough current will flow from the source to maintain the load voltage at 3V less than the supply.
2 3 4 5
5 6 4 1
VIN GND COM
6
3
Fault-Protected Analog Switch--normally closed NC or NO (NC) for MAX4510; normally open (NO) for MAX4520 N.C. No Connection. Not internally connected.
--
2, 7
_______________________________________________________________________________________
MAX4510/20 TOC11
3.0
0
7
Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX4510/MAX4520
NORMALLY OPEN SWITCH CONSTRUCTION V+ P2
HIGH FAULT P1 NO (NC) LOW FAULT COM N1
IN
ON
GND
V-ESD DIODE NC SWITCH
N2
MAX4510 MAX4520 Figure 1. Functional Diagram
Overview of MAX4510/MAX4520
The MAX4510/MAX4520 differ considerably from traditional fault-protection switches, with several advantages. First, they are constructed with two parallel FETs, allowing very low on-resistance when the switch is on. Second, they allow signals on the NC or NO pins that are within or slightly beyond the supply rails to be passed through the switch to the COM terminal, allowing rail-to-rail signal operation. Third, when a signal on NC or NO exceeds the supply rails by about 50mV (a fault condition), the voltage on COM is limited to the appropriate polarity supply voltage. Operation is identical for both fault polarities. The fault-protection extends to 36V from GND. During a fault condition, the NO or NC input pin becomes high impedance regardless of the switch state or load resistance. If the switch is on, the COM output current is furnished from the V+ or V- pin by "booster" FETs connected to each supply pin. These FETs can typically source or sink up to 13mA.
8
When power is removed, the fault protection is still in effect. In this case, the NO or NC terminals are a virtual open circuit. The fault can be up to 40V. The COM pin is not fault protected; it acts as a normal CMOS switch pin. If a voltage source is connected to the COM pin, it should be limited to the supply voltages. Exceeding the supply voltage will cause high currents to flow through the ESD protection diodes, possibly damaging the device (see Absolute Maximum Ratings).
Internal Construction
Internal construction is shown in Figure 1, with the analog signal paths shown in bold. A single normally open (NO) switch is shown; the normally closed (NC) configuration is identical except the logic-level translator becomes an inverter. The analog switch is formed by the parallel combination of N-channel FET N1 and Pchannel FET P1, which are driven on and off simultaneously according to the input fault condition and the logic-level state.
_______________________________________________________________________________________
Rail-to-Rail, Fault-Protected, SPST Analog Switches
Normal Operation
Two comparators continuously compare the voltage on the NO (or NC) pin with V+ and V-. When the signal on NO or NC is between V+ and V-, the switch acts normally, with FETs N1 and P1 turning on and off in response to IN signals. The parallel combination of N1 and P1 forms a low-value resistor between NO (or NC) and COM so that signals pass equally well in either direction. than 300mV, one of these diodes will conduct heavily. During normal operation these reverse-biased ESD diodes leak a few nanoamps of current to V+ and V-.
MAX4510/MAX4520
Fault-Protection Voltage and Power Off
The maximum fault voltage on the NC or NO pins is 36V with power applied and 40V with power off.
Failure Modes
The MAX4510/MAX4520 are not lightning arrestors or surge protectors. Exceeding the fault-protection voltage limits on NO or NC, even for very short periods, can cause the device to fail.
Positive Fault Condition
When the signal on NO (or NC) exceeds V+ by about 50mV, the high-fault comparator output is high, turning off FETs N1 and P1. This makes the NO (or NC) pin high impedance regardless of the switch state. If the switch state is "off," all FETs are turned off and both NO (or NC) and COM are high impedance. If the switch state is "on," FET P2 is turned on, sourcing current from V+ to COM.
Ground
There is no connection between the analog signal path and GND. The analog signal path consists of an Nchannel and P-channel MOSFET with their sources and drains paralleled and their gates driven out of phase to V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic-level translators and set the input logic thresholds. The logiclevel translators convert the logic levels to switched V+ and V- signals to drive the gates of the analog switch. This drive signal is the only connection between the power supplies and the analog signal. GND, IN, and COM have ESD-protection diodes to V+ and V-.
Negative Fault Condition
When the signal on NO (or NC) exceeds V- by about 50mV, the low-fault comparator output is high, turning off FETs N1 and P1. This makes the NO (or NC) pin high impedance regardless of the switch state. If the switch state is "off," all FETs are turned off and both NO (or NC) and COM are high impedance. If the switch state is "on," FET N2 is turned on, sinking current from COM to V-.
Transient Fault Response and Recovery
When a fast rise-time and fall-time transient on IN exceeds V+ or V-, the output (COM) follows the input (IN) to the supply rail with only a few nanoseconds delay. This delay is due to the switch on-resistance and circuit capacitance to ground. When the input transient returns to within the supply rails, however, there is a longer output recovery time delay. For positive faults, the recovery time is typically 3.5s. For negative faults, the recovery time is typically 1.3s. These values depend on the COM output resistance and capacitance. The delays are not dependent on the fault amplitude. Higher COM output resistance and capacitance increase recovery times.
IN Logic-Level Thresholds
The logic-level thresholds are CMOS and TTL compatible when V+ is +15V. As V+ is raised, the threshold increases slightly, and when V+ reaches 25V, the level threshold is about 2.8V--above the TTL output highlevel minimum of 2.4V, but still compatible with CMOS outputs (see Typical Operating Characteristics). Increasing V- has no effect on the logic-level thresholds, but it does increase the gate-drive voltage to the signal FETs, reducing their on-resistance.
Dual Supplies
The MAX4510/MAX4520 operate with dual supplies between 4.5V and 20V. The V+ and V- supplies need not be symmetrical, but their difference cannot exceed the absolute maximum rating of 44V.
COM and IN Pins
FETs N2 and P2 can source about 13mA from V+ or Vto the COM pin in the fault condition. Ensure that if the COM pin is connected to a low-resistance load, the absolute maximum current rating of 30mA is never exceeded, both in normal and fault conditions. The GND, COM, and IN pins do not have fault protection. Reverse ESD-protection diodes are internally connected between GND, COM, IN, and both V+ and V-. If a signal on GND, COM, or IN exceeds V+ or V- by more
Single Supply
The MAX4510/MAX4520 operate from a single supply between +9V and +36V when V- is connected to GND.
_______________________________________________________________________________________
9
Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX4510/MAX4520
Test Circuits/Timing Diagrams
V+ V+ NO OR NC VNO OR VNC LOGIC INPUT +3V 50% 0V t r < 20ns t f < 20ns
VIN
MAX4510 MAX4520
IN 50 GND COM V2k 35pF VOUT VOUT SWITCH OUTPUT 0V t ON 0.9 * V0UT
t OFF
0.9 * VOUT
VLOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. V- IS CONNECTED TO GND FOR SINGLE-SUPPLY OPERATION.
Figure 2. Switch Turn-On/Turn-Off Times
V+ VIN V+ IN 50 NO OR NC VIN 0V V+
MAX4510 MAX4520
COM GND VVOUT CL 1000pF
VOUT
VOUT
V-
VOUT IS THE MEASURED VOLTAGE DUE TO CHARGETRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT * CL
V- IS CONNECTED TO GND FOR SINGLE-SUPPLY OPERATION.
Figure 3. Charge Injection
10
______________________________________________________________________________________
Rail-to-Rail, Fault-Protected, SPST Analog Switches
Test Circuits/Timing Diagrams (continued)
MAX4510/MAX4520
V+ V+ NO OR NC
MAX4510 MAX4520
VIN IN GND
COM V-
1MHz CAPACITANCE ANALYZER
VV- IS CONNECTED TO GND FOR SINGLE-SUPPLY OPERATION.
Figure 4. COM, NO, and NC Capacitance
V+ 10nF NETWORK ANALYZER V+ COM VIN 50 50 OFF-ISOLATION = 20log ON-LOSS = 20log MEAS 50 50 REF VOUT VIN VOUT VIN
MAX4510 MAX4520
VIN IN GND VOUT NO, NC V-
10nF V-
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF ISOLATION IS MEASURED BETWEEN COM AND "OFF" NO OR NC TERMINALS. ON LOSS IS MEASURED BETWEEN COM AND "ON" NO OR NC TERMINALS. V- IS CONNECTED TO GND FOR SINGLE-SUPPLY OPERATION.
Figure 5. Frequency Response and Off-Isolation
Chip Information
TRANSISTOR COUNT: 139
______________________________________________________________________________________ 11
Rail-to-Rail, Fault-Protected, SPST Analog Switches MAX4510/MAX4520
Pin Configurations/Functional Diagrams/Truth Tables (continued)
COM
1
8
V+
COM
1
8
V+
N.C.
2
7
N.C.
N.C.
2
7
N.C.
NC
3
6
IN
NO
3
6
IN
GND
4
MAX4510 MAX
5
V-
GND
4
MAX4520 MAX
5
V-
IN N.C. = NOT CONNECTED SWITCHES SHOWN FOR LOGIC "0" INPUT. ALL SWITCHES ARE OFF WITH POWER REMOVED. 0 1
MAX4510 ON OFF
MAX4520 OFF ON
________________________________________________________Package Information
6LSOT.EPS
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) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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Price & Availability of MAX4520EUA

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