Datasheet MAX4512CSE, MAX4512CPE, MAX4512C-D, MAX4511MJE, MAX4511ESE Datasheet (Maxim)

...

Page 1

General Description

The MAX4511/MAX4512/MAX4513 are quad, singlepole/single-throw (SPST), fault-protected analog switches. They are pin-compatible with the industry-standard nonprotected DG201/DG202/DG213. These new switches feature fault-protected inputs and Rail-to-Rail®signal handling capability. The normally open (NO_) and normally closed (NC_) terminals are protected from overvoltage faults up to 36V during power-up or power-down. During a fault condition, the NO_ or NC_ terminal becomes an open circuit and only nanoamperes of leakage current flow from the source, but the switch output (COM_) furnishes up to 10mA 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 175Ω max and is matched between switches to 10Ω max. The off-leakage current is only

0.5nA at +25°C and 10nA at +85°C. The MAX4511 has four normally closed switches. The

MAX4512 has four normally open switches. The MAX4513 has two normally closed and two normally open switches.

These CMOS switches can operate with dual power supplies ranging from ±4.5V to ±18V or a single supply between +9V and +36V.

All digital inputs have +0.8V and +2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±15V or a single +12V supply.

Applications

ATE Equipment Data Acquisition Industrial and Process-Control Systems Avionics Redundant/Backup Systems

Features

♦ ±40V Fault Protection with Power Off

±36V Fault Protection with ±15V Supplies

♦ All Switches Off with Power Off ♦ Rail-to-Rail Signal Handling ♦ Output Clamped to Appropriate Supply Voltage

During Fault Condition; No Transition Glitch

♦ 175Ω max Signal Paths with ±15V Supplies ♦ No Power-Supply Sequencing Required ♦ ±4.5V to ±18V Dual Supplies

+9V to +36V Single Supply

♦ Low Power Consumption, <2mW ♦ Four Separately Controlled SPST Switches ♦ Pin-Compatible with Industry-Standard

DG411/DG412/DG413, DG201/DG202/DG213

♦ TTL- and CMOS-Compatible Logic Inputs with

Single +9V to +15V or ±15V Supplies

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

________________________________________________________________

Maxim Integrated Products

TOP VIEW

DIP/SO

MAX4511

LOGIC SWITCH

0 1

OFF

16 15 14 13 12 11 10

1 2 3 4 5 6 7 8

IN2 COM2 NC2

V+

V-

NC1

COM1

IN1

MAX4511

N.C. NC3 COM3 IN3

IN4

COM4

NC4

GND

N.C. = NOT CONNECTED SWITCHES SHOWN FOR LOGIC "0" INPUT. ALL SWITCHES ARE OFF WITH POWER REMOVED.

19-4760; Rev 0; 6/98

Ordering Information continued at end of data sheet.

Contact factory for dice specifications.

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Ordering Information

PART TEMP. RANGE PIN-PACKAGE

MAX4511C/D 0°C to +70°C Dice*

MAX4511CPE

0°C to +70°C 16 Plastic DIP

MAX4511CSE 0°C to +70°C 16 Narrow SO

Continued at end of data sheet.

MAX4511EPE -40°C to +85°C 16 Plastic DIP

MAX4511MJE -55°C to +125°C 16 CERDIP

MAX4511ESE -40°C to +85°C 16 Narrow SO

Pin Configurations/

Functional Diagrams/Truth Tables

Page 2

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—Dual Supplies

(

V+ = +15V, V- = -15V, GND = 0V, TA =T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

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.

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.

(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 (T

= +70°C) (Note 2)

Plastic DIP (derate 10.53mW/°C above +70°C) ...........842mW

Narrow SO (derate 8.70mW/°C above +70°C) .............696mW

CERDIP (derate 10.00mW/°C above +70°C)................800mW

Operating Temperature Ranges

MAX451_C_ E......................................................0°C to +70°C

MAX451_E_ E ...................................................-40°C to +85°C

MAX451_MJE .................................................-55°C to +125°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

Applies with power on or off (Note 2)

COM_

= ±14V;

NO_,VCOM

= 14V

COM_

= ±10V, I

COM_

= 1mA

COM_

= ±10V, I

COM_

= 1mA

CONDITIONS

C, E, M

-20 20

nAI

COM_(OFF)

-0.5 0.01 0.5

V-36 36V

NO_

, V

NC_

Fault-Protected Analog Signal Range

∆R

COM_ -NO_ or COM_ -NC_ On-Resistance Match Between Channels (Note 4)

Ω

250

COM_ -NO_ or COM_ -NC_ On-Resistance

125 160

UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER

C, E

+25°C

Applies with power on or off (Note 2)

C, E, M VV- V+V

NO_

, V

NC_

Fault-Free Analog Signal Range

Ω

15M

Applies with power on or off (Note 1)

C, E, M VV- - 0.3 V+ + 0.3V

COM_

Non-Protected Analog Signal Range (COM_ Output)

ANALOG SWITCH

200C, E

C, E 10

COM_ Off Leakage Current (Note 5)

COM_

= ±14V;

NO_,VCOM

= 14V

NO_ or NC_ Off Leakage Current (Note 5)

NO_(OFF),

NC_(OFF)

-0.5 0.01 0.5+25°C

-10 10C, E

-200 200M

-10 10C, E

-200 200M

COM_

= ±14V nAI

COM_(ON)

COM_ On Leakage Current (Note 5)

-0.5 0.01 0.5+25°C

-400 400M

Page 3

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(

V+ = +15V, V- = -15V, GND = 0V, TA =T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

NO_

or VNC_ = ±33V

NO_

or VNC_ = ±33V

CONDITIONS

+25°C

Turn-On Time 600

kΩR

COM_

COM_ On Output Resistance, Supplies On

1 2.5

-10 10

COM_

COM_ Output Leakage Current, Supplies On

UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER

+25°C

NO_

or VNC_ = 33V

mAI

COM_

COM_ On Output Current, Supplies On

81113

+25°C

NO_

or VNC_ = ±40V,

V+ = 0, V- = 0

µA-10 10

NO_

, I

NC_

NO_ or NC_ Input Leakage Current, Supplies Off

-200 200

+25°C

M -1 1 µA

1.9 2.4 VV

IN_H

IN_ Input Logic Threshold High C, E, M

900M

COM_

= ±10V, RL_= 2kΩ,

Figure 3

nst

BBM

Break-Before-Make Time Delay (MAX4513 Only)

50 100+25°C

-1 0.03 1

VIN_ = 0.8V or 2.4V µAI

INH

_, I

INL

IN_ Input Current Logic High or Low

+25°C

C, E -200 200

C, E

NO_

or VNC_ = -33V -12 -10 -7

C, E, M

C, E, M -5 5

C, E

350 500

COM_

= ±10V, RL_= 2kΩ,

Figure 2

OFF

Turn-Off Time 500C, E

750M

200 400

COM_

= ±10V, RL_= 2kΩ,

Figure 2

+25°C

NO_

or VNC_ = ±25V,

COM_

= 10V

µA-10 10

NO_

, I

NC_

NO_ or NC_ Off Input Leakage Current, Supplies On

-200 200

+25°C

C, E

-20 20

-20 0.1 20

SWITCH DYNAMIC CHARAC-

CL= 1.0nF, V

NO_

= 0,

RS = 0Ω, Figure 4

pCQCharge Injection (Note 6) 1.5 5+25°C

f = 1MHz, Figure 5 pFC

N_(OFF)

NO_ or NC_ Off-Capacitance 10+25°C

f = 1MHz, Figure 5 pFC

COM_(OFF)

COM_ Off-Capacitance 5+25°C

f = 1MHz, Figure 5 pFC

COM_(ON)

COM_ On-Capacitance 10+25°C

LOGIC INPUT

RL= 50Ω, CL= 15pF, VN_= 1V

RMS

, f = 1MHz, Figure 6

dBVC

ISO

Off Isolation (Note 7) -62+25°C

RL= 50Ω, CL= 15pF, VN_= 1V

RMS

, f = 1MHz, Figure 6

dBV

Channel-to-Channel Crosstalk (Note 9)

-66+25°C

0.8 1.9 VV

IN_L

IN_ Input Logic Threshold Low C, E, M

FAULT (V+ = +15V, V- = -15V, unless otherwise noted.)

LOGIC INPUT

SWITCH DYNAMIC CHARACTERISTICS

Page 4

All V

IN_

= 0 or 15V

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(

V+ = +15V, V- = -15V, GND = 0V, T

A = TMIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

CONDITIONS UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER T

Power-Supply Range V+, V- C,E, M ±4.5 ±18 V V+ Supply Current I+ All V

IN_

= 0 or 5V

+25°C 280 400

µA

V- Supply Current I- All V

IN_

= 0 or 5V

+25°C 90 200

µA

GND Supply Current I

GND

All V

IN_

= 0 or 15V

+25°C -1 0.01 1

µA

600C, E, M

C, E, M 300

C, E, M 10

+25°C 150 250

µA

C, E, M 450

All V

IN_

= 5V

POWER SUPPLY

Page 5

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS—Single +12V Supply

(V+ = +10.8V to +13.2V, V- = 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

Applies with power on or off (Note 2)

C, E, M V

Applies with power on or off (Note 2)

0V+V

NO_

, V

NC_

Fault-Free Analog Signal Range

V+ = 12V; V

COM _

= 0;

NO_

, V

NC_

= 12V

V+ = 12V, V

COM_

= 10V,

COM_

= 1mA

V+ = 12V, V

COM_

= 10V,

COM_

= 1mA

CONDITIONS

C, E, M

Applies with power on or off (Note 1)

C, E, M V-0.3 V+ + 0.3V

COM_

Non-Protected Analog Signal Range (COM_ Output)

V+ = 12V; V

COM_

= 10V;

NO_

, V

= 0 or 12V

Ω

ON_(OFF),

NC_(OFF)

30M

NO_ or NC_ Off Leakage Current (Notes 5, 9)

-0.5 0.01 0.5+25°C

nAI

COM_(OFF)

COM_ Off Leakage Current (Notes 5, 9)

-0.5 0.01 0.5

V-36 36V

NO_

, V

NC_

Fault-Protected Analog Signal Range

∆R

COM_ -NO_ or COM_ -NC_ On-Resistance Match Between Channels (Note 4)

Ω

525

COM_ -NO_ or COM_ -NC_ On-Resistance

UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER

+25°C

C, E

+25°C

+25°C 410

260 390

450

-10 10C, E

M -200 200

-10 10C, E

-200 200M

V+ = 12V, V

COM_

= 10V or 12V

-20 20C, E nAI

COM_(ON)

COM_ On Leakage Current (Notes 5, 9)

-400 400M

-0.5 0.01 0.5+25°C

NO_

or VNC_ = ±25V,

COM_

= 0, V+ = 12V

-200 200C, E

NO_

, I

NC_

NO_ or NC_ Off Input Leakage Current, Supply On

-10 10M

-20 20+25°C

NO_

or VNC_ = ±40V,

V+ = 0, V- = 0

-200 200C, E

NO_

, I

NC_

NO_ or NC_ Input Leakage Current, Supply Off

-10 10M

-20 0.1 20+25°C

NO_

or VNC_ = 25V,

V+ = 12V

235mAI

COM_

COM_ Output Current, Supply On

+25°C

NO_

or VNC_ = 10V

V+ = 12V

kΩR

COM_

COM_ Output Resistance, Supply On

2.4 5+25°C

µA

NO_

or VNC_ = ±30V,

V+ = 12V

-200 200C, E

COM_

COM_ Output Leakage Current, Supply On

-1 1M

-10 10+25°C

µA

FAULT

ANALOG SWITCH

Page 6

µA

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

6 _______________________________________________________________________________________

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.

Note 3: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 4: ∆R

= ∆R

ON(MAX)

- ∆R

ON(MIN)

Note 5: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at T

= +25°C.

Note 6: Guaranteed by design. Note 7: Off isolation = 20 log10 [ V

COM_

/ (V

NC_

or V

NO_

) ], V

COM_

= output, V

NC_

or V

NO_

= input to off switch.

Note 8: Between any two switches. Note 9: Leakage testing for single-supply operation is guaranteed by testing with dual supplies.

ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)

(V+ = +10.8V to +13.2V, V- = 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

COM_

= 10V, RL_= 2kΩ,

Figure 2

CONDITIONS

COM_

= 10V, RL_= 2kΩ,

Figure 3

nst

Turn-On Time

1.8 2.4

500 1000

IN_H

IN_ Input Logic Threshold High C, E, M

0.8 1.8 VV

IN_L

IN_ Input Logic Threshold Low C, E, M

COM_

= 10V, RL_= 2kΩ,

Figure 2

-1 0.03 1

OFF

Turn-Off Time

400 900

+25°C

BBM

Break-Before-Make Time Delay (MAX4513 Only)

50 100+25°C

VIN_ = 0.8V or 2.4V µAI

IN_H

, I

IN_L

UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER

IN_ Input Current Logic High or Low

+25°C

LOGIC INPUT

C, E, M -5 5

C, E, M

C, E, M 1500

1200

CL= 1.0nF, V

NO_

= 0,

RS= 0Ω, Figure 4

pCQCharge Injection (Note 6) 15+25°C

f = 1MHz, Figure 5 pFC

N_ (OFF)

NO_ or NC_ Off Capacitance 9+25°C

COM_

= GND, f = 1MHz,

Figure 5

pFC

COM_ (OFF)

COM_ Off Capacitance 9+25°C

COM_

= V

NO_

= GND,

f = 1MHz, Figure 5

pFC

COM_ (ON)

COM_ On Capacitance 22+25°C

RL= 50Ω, CL= 15pF, VN_= 1V

RMS

, f = 1MHz, Figure 6

dBV

ISO

Off Isolation (Note 7) -62+25°C

RL= 50Ω, CL= 15pF, VN_= 1V

RMS

, f = 1MHz, Figure 5

dBV

Channel-to-Channel Crosstalk (Note 8)

-65+25°C

VV+Power-Supply Range 936C,E, M

All V

IN_

= 0 or 5V µAI+V+ Supply Current

150 300+25°C

All V

IN_

= 0 or 12V

GND

V- and GND Supply Current

50 100+25°C

All V

IN_

= 5V

µA

150 300+25°C

450C, E, M

C, E, M

200

450

SWITCH DYNAMIC CHARACTERISTICS

POWER SUPPLY

Page 7

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

100

250

200

150

300

350

-20 -5 0-15 -10 5 10 15 20

SWITCH ON-RESISTANCE

vs. V

COM

(DUAL SUPPLIES)

MAX4511-01

COM

(V)

SWITCH ON-RESISTANCE (Ω)

V+ = +5V

V- = -5V

V+ = +10V

V- = -10V

V+ = +15V

V- = -15V

V+ = +12V

V- = -12V

V+ = +20V

V- = -20V

80 60

160 140

100

120

180

200

-15 -5 0-10 5 10 15

SWITCH ON-RESISTANCE vs. V

COM

AND

TEMPERATURE (DUAL SUPPLIES)

MAX4511-02

COM

(V)

SWITCH ON-RESISTANCE (Ω)

TA = +125°C

TA = -55°C

V+ = +15V

V- = -15V

TA = -40°C

TA = +25°C

TA = +85°C

1000

100

0 5 10 15 20 25 30

SWITCH ON-RESISTANCE

vs. V

COM

(SINGLE SUPPLY)

MA4511-03

COM

(V)

SWITCH ON-RESISITANCE (Ω)

V+ = +12V

V+ = +5V

V- = 0

V+ = +15V

V+ = +20V

V+ = +24V

V+ = +30V

200 150 100

300

350

250

400

0462 8 10 12

SWITCH ON-RESISTANCE vs. V

COM

AND TEMPERATURE (SINGLE SUPPLY)

MAX4511-04

COM

(V)

SWITCH ON-RESISTANCE (Ω)

TA = +125°C

TA = +85°C

TA = +25°C

TA = -40°C

TA = -55°C

V+ = +12V

300 200 100

700

800

600 500 400

900

1000

0 5 10 15 20

ON AND OFF TIMES

vs. SUPPLY VOLTAGE

MAX4511-07

SUPPLY VOLTAGE (±V)

, t

OFF

(ns)

(SINGLE SUPPLY)

(DUAL SUPPLIES)

OFF

(DUAL SUPPLIES)

OFF

(SINGLE SUPPLY)

10p

100p

10n

100n

-50 0-25 25 50 75 100 125 150

D(ON)

, I

S(OFF)

, AND I

D(OFF)

LEAKAGES vs. TEMPERATURE

MAX4511-05

TEMPERATURE (°C)

LEAKAGE (A)

NO(OFF)

= -14V,

COM

= +14V

COM(ON)

= V

COM

= +14V

NO(OFF)

= +14V,

COM

= -14V

COM(OFF)

= -14V,

COM =

+14V

COM(OFF)

= +14V,

COM = -14V

COM(ON)

= V

COM

= -14V

-15 -10 -5 0 5 10 15

CHARGE INJECTION

vs. V

COM

(DUAL SUPPLIES)

MAX4511-06

COM

(V)

Q (pC)

DUAL ±15V

SUPPLIES

SINGLE +12V

SUPPLY

V+ = +15V V- = -15V

100

300

200

500

400

600

-50 0 25-25 50 75 100 125

ON AND OFF TIMES

vs. TEMPERATURE

MAX4511-08

TEMPERATURE (°C)

, t

OFF

(ns)

OFF

100

300

200

500

400

600

-50 0 25-25 50 75 100 125

POWER-SUPPLY CURRENT

vs. TEMPERATURE

MAX4511-09

TEMPERATURE (°C)

SUPPLY CURRENT

(µA)

V+

V-

GND

Page 8

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

8 _______________________________________________________________________________________

0.5

1.5

1.0

2.5

2.0

3.0

010155 20253035

LOGIC-LEVEL THRESHOLD vs. V+

MAX4511-10

V+ (V)

LOGIC-LEVEL THRESHOLD (V)

Typical Operating Characteristics (continued)

(TA= +25°C, unless otherwise noted.)

-10

-20

-120

0.01 0.1 1 10 100 1000

FREQUENCY RESPONSE

-90

-100

-110

MAX186-14A

FREQUENCY (MHz)

LOSS (dB)

PHASE (DEGREES)

-70

-80

-50

-60

-30

-40

120 100

-120

-60

-80

-100

-20

-40

20 0

60 40

ON LOSS

OFF LOSS

ON PHASE

NAME FUNCTION

1, 16,

9, 8

IN1–IN4 Logic Control Digital Inputs

2, 15,

10, 7

COM1–

COM4

Analog Switch Common* Terminals

3, 14,

11, 6

NO1–NO4

NC1–NC4

Analog Switch Fault-Protected Normally Open* or Normally Closed* Terminals

4 V-

Negative Analog Supply Voltage Input. Connect to GND for single-supply operation.

13 V+

Positive Analog and Digital Supply-Voltage Input. Internally connected to substrate.

12 N.C. No Connection—not internally connected

5 GND

Ground. Connect to digital ground. (Analog signals have no ground reference.)

Pin Description

As long as the voltage on NO_ or NC_ does not exceed V+ or V-, NO_ (or NC_) and COM_ pins are identical and interchangeable. Either may be considered as an input or output; signals pass equally well in either direction.

Detailed Description

Overview of Traditional

Fault-Protected Switches

The MAX4511/MAX4512/MAX4513 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.

Page 9

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

_______________________________________________________________________________________ 9

Overview of MAX4511/MAX4512/MAX4513

The MAX4511/MAX4512/MAX4513 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 faultprotection 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 10mA.

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_ pins are not fault protected; they act as normal CMOS switch pins. If a voltage source is connected to any 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

Pin Compatibility

These switches have identical pinouts to common nonfault-protected CMOS switches. Care should be exercised in considering them for direct replacements in existing printed circuit boards, however, since only the NO_ and NC_ pins of each switch are fault protected.

Internal Construction

Internal construction is shown in Figure 1, with the analog signal paths shown in bold. A single normally open

V+

NO_

(NC_)

IN_

GND

V-

HIGH

FAULT

LOW

FAULT

COM_

NC SWITCH

-ESD DIODE

NORMALLY OPEN SWITCH CONSTRUCTION

Figure 1. Block Diagram

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MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

10 ______________________________________________________________________________________

(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.

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.

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_.

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 3.5µs. For negative faults, the recovery time is typically 1.3µs. These values depend on the COM_ output resistance and capacitance, and are not production tested or guaranteed. The delays are not dependent on the fault amplitude. Higher COM_ output resistance and capacitance increase recovery times.

COM_ and IN_ Pins

FETs N2 and P2 can source about ±10mA 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 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-.

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 MAX4511/MAX4512/MAX4513 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. The failure modes may not be obvious, and failure in one switch may or may not affect other switches in the same package.

Ground

There is no connection between the analog signal paths and GND. The analog signal paths consist of an N-channel 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 switches. This drive signal is the only connection between the power supplies and the analog signals. GND, IN_, and COM_ have ESD-protection diodes to V+ and V-.

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 high level 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.

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MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

______________________________________________________________________________________ 11

Bipolar Supplies

The MAX4511/MAX4512/MAX4513 operate with bipolar supplies between ±4.5V and ±18V. The V+ and V- supplies need not be symmetrical, but their difference can not exceed the absolute maximum rating of 44V.

Single Supply

The MAX4511/MAX4512/MAX4513 operate from a single supply between +9V and +36V when V- is connected to GND.

High-Frequency Performance

In 50Ω systems, signal response is reasonably flat up to 50MHz (see

Typical Operating Characteristics

). Above

20MHz, the on-response has several minor peaks that are highly layout dependent. The problem with high-frequency operation is not turning the switch on, but turning it off. The off-state switch acts like a capacitor and passes higher frequencies with less attenuation. At 10MHz, off isolation is about -42dB in 50Ω systems, becoming worse (approximately 20dB per decade) as frequency increases. Higher circuit impedances also make off isolation worse. Adjacent channel attenuation is about 3dB above that of a bare IC socket and is due entirely to capacitive coupling.

50%

V+

+10V

OUT

IN_

90%

OFF

IN_

V+

OUT

GND

V+

IN_

NO_ OR NC_

COM_

+10V

MAX4511 MAX4512 MAX4513

50Ω

10pF

V-

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

Figure 2. Switch Turn-On/Turn-Off Times

Test Circuits/Timing Diagrams

50%

V+

NO_

, V

NC_

OUT

IN_

80%

OPEN

V+

OUT

IN_

GND V-

V-

V+

IN_

NO_ NC_

COM_

+10V

MAX4513

50Ω

10pF

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

< 5ns

Figure 3. MAX4513 Break-Before-Make Interval

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MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

12 ______________________________________________________________________________________

V+

IN_

∆ V

OUT

IS THE MEASURED VOLTAGE DUE TO CHARGE-

TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.

∆ V

OUT

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. Q = ∆ V

OUT

x C

OUT

V+

OUT

IN_

GND

V+

V-

IN_

NO_ OR NC_

COM_

MAX4511 MAX4512 MAX4513

50Ω

1000pF

Figure 4. Charge Injection

V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

V+

GND

V+

V-

IN_

NO_

COM_

MAX4511 MAX4512 MAX4513

NC_

ADDRESS SELECT

1MHz

CAPACITANCE

ANALYZER

Figure 5. COM_, NO_, NC_ Capacitance

Test Circuits/Timing Diagrams (continued)

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MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

______________________________________________________________________________________ 13

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. CROSSTALK IS MEASURED BETWEEN COM_ TERMINALS WITH ALL SWITCHES ON. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED. V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.

V+

GND

MEAS. REF.

V+

V-

IN_

COM_

MAX4511 MAX4512 MAX4513

NO_, NC_

ADDRESS SELECT

10nF

NETWORK ANALYZER

50Ω

50Ω 50Ω

50Ω

OFF ISOLATION = 20 log

ON LOSS = 20 log

CROSSTALK = 20 log

OUT

Figure 6. Frequency Response, Off Isolation, and Crosstalk

Test Circuits/Timing Diagrams (continued)

N.C. = NOT CONNECTED SWITCHES SHOWN FOR LOGIC “0” INPUT. ALL SWITCHES ARE OFF WITH POWER REMOVED.

DIP/SO

MAX4512

LOGIC SWITCH

0 1

OFF

16 15 14 13 12 11 10

1 2 3 4 5 6 7 8

IN2 COM2 NO2 V+

V-

NO1

COM1

IN1

MAX4512

N.C. NO3 COM3 IN3

IN4

COM4

NO4

GND

TOP VIEW

DIP/SO

MAX4513

LOGIC

SWITCHES

1, 4

0 1

OFF

SWITCHES

2, 3

OFF

16 15 14 13 12 11 10

1 2 3 4 5 6 7 8

IN2 COM2 NC2 V+

V-

NO1

COM1

IN1

MAX4513

N.C. NC3 COM3 IN3

IN4

COM4

NO4

GND

Pin Configurations/Functional Diagrams/Truth Tables (continued)

Page 14

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

14 ______________________________________________________________________________________

NC1COM1 IN1 IN2

COM2

V-

GND

NC4

COM4 IN4 IN3 COM3

0.086"

(2.261mm)

0.138"

(3.51mm)

V+

NC2

NC3

MAX4511

NO1 NO2COM1 IN1 IN2

COM2

V-

GND

COM4NO4 IN4 IN3 NO3COM3

0.086"

(2.261mm)

V+

MAX4512

0.138"

(3.51mm)

PART

MAX4512CPE

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

16 Plastic DIP MAX4512CSE 0°C to +70°C 16 Narrow SO MAX4512C/D 0°C to +70°C Dice* MAX4512EPE -40°C to +85°C 16 Plastic DIP MAX4512ESE -40°C to +85°C 16 Narrow SO MAX4512MJE -55°C to +125°C 16 CERDIP MAX4513CPE

0°C to +70°C 16 Plastic DIP MAX4513CSE 0°C to +70°C 16 Narrow SO MAX4513C/D 0°C to +70°C Dice* MAX4513EPE -40°C to +85°C 16 Plastic DIP MAX4513ESE -40°C to +85°C 16 Narrow SO MAX4513MJE -55°C to +125°C 16 CERDIP

Ordering Information (continued)

Contact factory for dice specifications.

Chip Topographies

NO1 NC2COM1 IN1 IN2

COM2

V-

GND

COM4NO4 IN4 IN3 NC3COM3

V+

MAX4513

0.086"

(2.261mm)

0.138"

(3.51mm)

TRANSISTOR COUNT: 139 SUBSTRATE CONNECTED TO: V+

Page 15

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected,

SPST Analog Switches

______________________________________________________________________________________ 15

SOICN.EPS

PDIPN.EPS

________________________________________________________Package Information

Page 16

MAX4511/MAX4512/MAX4513

Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches

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.

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

CDIPS.EPS

Package Information (continued)