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

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 [phone].
For small orders, phone [phone] ext. 3468.

MAX4511/MAX4512/MAX4513

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

SPST Analog Switches

________________________________________________________________

Maxim Integrated Products

1

TOP VIEW

DIP/SO

MAX4511

LOGIC SWITCH

0
1

ON

OFF

16
15
14
13
12
11
10

9

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

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

A

= +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)

V

COM_

= ±14V;

V

NO_,VCOM

= 14V

V

COM_

= ±10V, I

COM_

= 1mA

V

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

ON

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

Ω

250

R

ON

COM_ -NO_ or COM_ -NC_
On-Resistance

125 160

UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER

C, E

+25°C

+25°C

+25°C

T

A

Applies with power on or off
(Note 2)

C, E, M VV- V+V

NO_

, V

NC_

Fault-Free Analog Signal Range

M

36

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)

V

COM_

= ±14V;

V

NO_,VCOM

= 14V

NO_ or NC_ Off Leakage Current
(Note 5)

nA

I

NO_(OFF),

I

NC_(OFF)

-0.5 0.01 0.5+25°C

-10 10C, E

-200 200M

±

-10 10C, E

-200 200M

V

COM_

= ±14V nAI

COM_(ON)

COM_ On Leakage Current
(Note 5)

-0.5 0.01 0.5+25°C

-400 400M

±

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.)

V

NO_

or VNC_ = ±33V

V

NO_

or VNC_ = ±33V

CONDITIONS

+25°C

t

ON

Turn-On Time 600

kΩR

COM_

COM_ On Output Resistance,
Supplies On

1 2.5

nA

-10 10

I

COM_

COM_ Output Leakage Current,
Supplies On

UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER

+25°C

+25°C

T

A

V

NO_

or VNC_ = 33V

mAI

COM_

COM_ On Output Current,
Supplies On

81113

+25°C

V

NO_

or VNC_ = ±40V,

V+ = 0, V- = 0

µA-10 10

I

NO_

, I

NC_

NO_ or NC_ Input Leakage
Current, Supplies Off

M

nA

-200 200

+25°C

M -1 1 µA

1.9 2.4 VV

IN_H

IN_ Input Logic Threshold High C, E, M

900M

V

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

V

NO_

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

C, E, M

C, E, M -5 5

C, E

350 500

V

COM_

= ±10V, RL_= 2kΩ,

Figure 2

ns

t

OFF

Turn-Off Time 500C, E

750M

200 400

V

COM_

= ±10V, RL_= 2kΩ,

Figure 2

ns

+25°C

3

V

NO_

or VNC_ = ±25V,

V

COM_

= 10V

µA-10 10

I

NO_

, I

NC_

NO_ or NC_ Off Input Leakage
Current, Supplies On

M

nA

-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

CT

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

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

A

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

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;

V

NO_

, V

NC_

= 12V

V+ = 12V, V

COM_

= 10V,

I

COM_

= 1mA

V+ = 12V, V

COM_

= 10V,

I

COM_

= 1mA

M

20

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;

V

NO_

, V

NC

= 0 or 12V

nA

Ω

I

ON_(OFF),

I

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

ON

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

Ω

525

R

ON

COM_ -NO_ or COM_ -NC_
On-Resistance

UNITS

MIN TYP MAX

(Note 3)

SYMBOLPARAMETER

+25°C

C, E

C, E

T

A

+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

V

NO_

or VNC_ = ±25V,

V

COM_

= 0, V+ = 12V

-200 200C, E

nA

I

NO_

, I

NC_

NO_ or NC_ Off Input Leakage
Current, Supply On

-10 10M

-20 20+25°C

V

NO_

or VNC_ = ±40V,

V+ = 0, V- = 0

-200 200C, E

nA

I

NO_

, I

NC_

NO_ or NC_ Input Leakage
Current, Supply Off

-10 10M

-20 0.1 20+25°C

V

NO_

or VNC_ = 25V,

V+ = 12V

235mAI

COM_

COM_ Output Current,
Supply On

+25°C

V

NO_

or VNC_ = 10V

V+ = 12V

kΩR

COM_

COM_ Output Resistance,
Supply On

2.4 5+25°C

µA

µA

V

NO_

or VNC_ = ±30V,

V+ = 12V

-200 200C, E

nA

I

COM_

COM_ Output Leakage
Current, Supply On

-1 1M

-10 10+25°C

µA

FAULT

ANALOG SWITCH

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

ON

= ∆R

ON(MAX)

- ∆R

ON(MIN)

.

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

A

= +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.)

V

COM_

= 10V, RL_= 2kΩ,

Figure 2

CONDITIONS

V

COM_

= 10V, RL_= 2kΩ,

Figure 3

nst

ON

Turn-On Time

1.8 2.4

500 1000

VV

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

V

COM_

= 10V, RL_= 2kΩ,

Figure 2

ns

-1 0.03 1

t

OFF

Turn-Off Time

400 900

ns

+25°C

t

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

+25°C

T

A

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

V

COM_

= GND, f = 1MHz,

Figure 5

pFC

COM_ (OFF)

COM_ Off Capacitance 9+25°C

V

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

CT

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

I

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

C, E, M

200

450

SWITCH DYNAMIC CHARACTERISTICS

POWER SUPPLY

MAX4511/MAX4512/MAX4513

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

SPST Analog Switches

_______________________________________________________________________________________

7

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

100

50

250

200

150

300

350

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

SWITCH ON-RESISTANCE

vs. V

COM

(DUAL SUPPLIES)

MAX4511-01

V

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

0

80
60

20

40

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

V

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

V

COM

(V)

SWITCH ON-RESISITANCE (Ω)

V+ = +12V

V+ = +5V

V- = 0

V+ = +15V

V+ = +20V

V+ = +24V

V+ = +30V

0

50

200
150
100

300

350

250

400

0462 8 10 12

SWITCH ON-RESISTANCE vs. V

COM

AND TEMPERATURE (SINGLE SUPPLY)

MAX4511-04

V

COM

(V)

SWITCH ON-RESISTANCE (Ω)

TA = +125°C

TA = +85°C

TA = +25°C

TA = -40°C

TA = -55°C

V+ = +12V

0

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

ON

, t

OFF

(ns)

t

ON

(SINGLE SUPPLY)

t

ON

(DUAL SUPPLIES)

t

OFF

(DUAL SUPPLIES)

t

OFF

(SINGLE
SUPPLY)

1p

10p

100p

1n

10n

100n

-50 0-25 25 50 75 100 125 150

I

D(ON)

, I

S(OFF)

, AND I

D(OFF)

LEAKAGES vs. TEMPERATURE

MAX4511-05

TEMPERATURE (°C)

LEAKAGE (A)

I

NO(OFF)

@V

NO

= -14V,

V

COM

= +14V

I

COM(ON)

@V

NO

= V

COM

= +14V

I

NO(OFF)

@V

NO

= +14V,

V

COM

= -14V

I

COM(OFF)

@V

NO

= -14V,

V

COM =

+14V

I

COM(OFF)

@V

NO

= +14V,

V

COM = -14V

I

COM(ON)

@V

NO

= V

COM

= -14V

0

2

8

10

6

4

12

14

-15 -10 -5 0 5 10 15

CHARGE INJECTION

vs. V

COM

(DUAL SUPPLIES)

MAX4511-06

V

COM

(V)

Q (pC)

DUAL ±15V

SUPPLIES

SINGLE +12V

SUPPLY

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

0

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

ON

, t

OFF

(ns)

t

ON

t

OFF

0

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)

I

V+

I

V-

I

GND

MAX4511/MAX4512/MAX4513

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

8 _______________________________________________________________________________________

0

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.)

0

-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

80

-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

PIN

3, 14,

11, 6

NO1–NO4

or

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.

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

ON

N1

P1

P2

COM_

N2

NC SWITCH

-ESD DIODE

NORMALLY OPEN SWITCH CONSTRUCTION

Figure 1. Block Diagram

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.

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%

t

ON

V+

0V

+10V

V

OUT

V

IN_

0V

90%

90%

t

OFF

V

IN_

V+

V

OUT

GND

V+

IN_

NO_ OR NC_

COM_

+10V

MAX4511
MAX4512
MAX4513

2k

50Ω

10pF

V-

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+

0V

V

NO_

, V

NC_

V

OUT

V

IN_

0V

80%

t

OPEN

V+

V

OUT

V

IN_

GND V-

V-

2k

V+

IN_

IN_

NO_
NC_

COM_

COM_

+10V

MAX4513

50Ω

10pF

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

t

R

< 5ns

t

F

< 5ns

Figure 3. MAX4513 Break-Before-Make Interval

MAX4511/MAX4512/MAX4513

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

12 ______________________________________________________________________________________

0V

V+

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

L

V

OUT

V+

V

OUT

V

IN_

GND

V+

V-

V-

IN_

NO_ OR NC_

COM_

MAX4511
MAX4512
MAX4513

50Ω

C

L

1000pF

Figure 4. Charge Injection

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

V+

V+

GND

V+

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)

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-

V-

IN_

COM_

MAX4511
MAX4512
MAX4513

NO_, NC_

ADDRESS SELECT

10nF

10nF

NETWORK
ANALYZER

50Ω

50Ω 50Ω

50Ω

OFF ISOLATION = 20 log

ON LOSS = 20 log

CROSSTALK = 20 log

V

OUT

V

IN

V

OUT

V

IN

V

OUT

V

IN

V

IN

V

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

ON

16
15
14
13
12
11
10

9

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

ON

SWITCHES

2, 3

ON

OFF

16
15
14
13
12
11
10

9

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)

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+

MAX4511/MAX4512/MAX4513

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

SPST Analog Switches

______________________________________________________________________________________ 15

SOICN.EPS

PDIPN.EPS

________________________________________________________Package Information

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.

16

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

© 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

CDIPS.EPS

Package Information (continued)