MAXIM MAX4534, MAX4535 User Manual

General Description

The MAX4534 (single 4-to-1) and MAX4535 (dual 2-to-

1) fault-protected multiplexers operate with ±4.5V to ±20V dual supplies or a +9V to +36V single supply. These multiplexers feature fault-protected inputs, railto-rail signal-handling capability, and overvoltage clamping at 150mV beyond the rails. Both parts feature ±40V overvoltage protection with supplies off and ±25V protection with supplies on. On-resistance is 400Ω max and is matched between channels to 10Ω max. All digital inputs have TTL logic thresholds, ensuring TTL/CMOS-logic compatibility when using a single +12V or dual ±15V supplies.

Applications

Data-Acquisition Systems

Industrial and Process Control

Avionics

Signal Routing

Redundant/Backup Systems

Features

♦ ±40V Fault Protection with Power Off

±25V Fault Protection with ±15V Supplies

♦ No Power-Supply Sequencing Required

♦ All Channels Off with Power Off

♦ Rail-to-Rail Signal Handling

♦ Output Clamped to Appropriate Supply Voltage

During Fault Condition

♦ 1.0kΩ typ Output Clamp Resistance During

Overvoltage

♦ 400Ω max On-Resistance

♦ 20ns typ Fault Response Time

♦ ±4.5V to ±20V Dual Supplies

+9V to +36V Single Supply

♦ TTL/CMOS-Compatible Logic Inputs

MAX4534/MAX4535

Fault-Protected, High-Voltage,

Single 4-to-1/Dual 2-to-1 Multiplexers

________________________________________________________________ Maxim Integrated Products 1

14

13

12

11

10

9

8

1

2

3

4

5

6

7

A1

GND

V+

NO3

NO1

V-

EN

A0

TOP VIEW

MAX4534

NO4

N.C.

COM

N.C.

NO2

TSSOP/SO/DIP

LOGIC

14

13

12

11

10

9

8

1

2

3

4

5

6

7

N.C.

GND

V+

NO1B

NO1A

V-

EN

A0

MAX4535

NO2B

N.C.

COMB

COMA

N.C.

NO2A

TSSOP/SO/DIP

LOGIC

19-1609; Rev 2; 5/05

Ordering Information

Pin Configurations

14 Narrow SO0°C to +70°CMAX4535CSD

14 TSSOP0°C to +70°C

MAX4535CUD

14 Plastic DIP-40°C to +85°CMAX4534EPD

14 Narrow SO-40°C to +85°CMAX4534ESD

14 TSSOP-40°C to +85°CMAX4534EUD

14 Plastic DIP

14 Narrow SO

14 TSSOP

PIN-PACKAGETEMP RANGE

0°C to +70°C

0°C to +70°CMAX4534CPD

MAX4534CSD

MAX4534CUD

PART

14 Plastic DIP-40°C to +85°CMAX4535EPD

14 Narrow SO-40°C to +85°CMAX4535ESD

14 TSSOP-40°C to +85°CMAX4535EUD

14 Plastic SO0°C to +70°CMAX4535CPD

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.

MAX4534/MAX4535

Fault-Protected, High-Voltage, Single 4-to-1/Dual 2-to-1 Multiplexers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—Dual Supplies

(V+ = +15V, V- = -15V, V

A_H

= V

ENH

= 2.4V, V

A_L

= V

E

NL

= 0.8V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +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 +44V

V- ............................................................................-44V to +0.3V

V+ to V-...................................................................-0.3V to +44V

COM_, A_, EN (Note 1)........................ (V- - 0.3V) to (V+ + 0.3V)

NO_ (Note 2)...........................................(V+ - 40V) to (V- + 40V)

NO_ to COM_ (Note 2) ............................................-40V to +40V

NO_ Overvoltage with Switch Power On (Note 2). ..-36V to +36V NO_ Overvoltage with Switch Power Off (Note 2). ..-40V to +40V

Continuous Current into Any Terminal..............................±30mA

Peak Current Into Any Terminal

(pulsed at 1ms, 10% duty cycle).................................±100mA

Continuous Power Dissipation (T

A

= +70°C)

14-Pin TSSOP (derate 6.3mW/°C above +70°C) ..........500mW

14-Pin Narrow SO (derate 8mW/°C above +70°C) .......640mW

14-Pin Plastic DIP (derate 10mW/°C above +70°C) .....800mW

Operating Temperature Ranges

MAX453_C_D.......................................................0°C to +70°C

MAX453_E_D....................................................-40°C to +85°C

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

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

Note 1: COM_, EN, and A_ pins are not fault protected. Signals on COM_, EN, or A_ exceeding V+ or V- are clamped by internal

diodes. Limit forward diode current to maximum current rating.

Note 2: NO_ pins are fault-protected. Signals on NO_ exceeding -25V to +25V may damage the device during power-on conditions.

When the power is off the maximum voltage range is -40V to +40V.

T

A

C, E

+25°C

C, E

+25°C

C, E

+25°C

C, E

+25°C

C, E

+25°C

C, E

CONDITIONS

V

COM_

= ±10V,

V

NO_

= –+10V

V

COM_

= ±10V, I

NO_

= 1mA

V

COM_

= ±10V, I

NO_

= 1mA

V

NO_

= ±10V, V

COM_

= –+10V

Applies with power on or off

PARAMETER SYMBOL MIN TYP MAX UNITS

15

On-Resistance Match Between Channels (Note 4)

∆R

ON

210

Ω

On-Resistance Ω

500

-0.5 0.01 0.5

nA

-5 5

NO_ Off-Leakage Current (Note 5)

I

NO_(OFF)

Fault-Free Analog Signal Range V

NO_

V- V+

V

R

ON

275 400

I

COM_(OFF)

nA

-2 0.05 2

-60 60

-1 0.05 1

-30 30

COM_ Off-Leakage Current (Note 5)

I

COM_(ON)

nA

V

NO_

-2 0.1 2

Applies with power on

+25°C

-80 80

C, E

COM_ On-Leakage Current (Note 5)

-1 0.1 1

-40 40

-25 +25

-40 +40

Fault-Protected Analog Signal Range (Note 6)

V

Applies with power off

I

COM_

nA-20 20

-1 1

COM_ Output Leakage Current, Supplies On

V

COM_

= ±10V,

V

NO_

= floating

MAX4535

V

NO_

= ±25V, VEN= 0, V

COM_

= 0

MAX4534

FAULT PROTECTION

ANALOG SWITCH

µA

MAX4534/MAX4535

Fault-Protected, High-Voltage,

Single 4-to-1/Dual 2-to-1 Multiplexers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(V+ = +15V, V- = -15V, V

A_H

= V

ENH

= 2.4V, V

A_L

= V

E

NL

= 0.8V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 3)

V

NO_

= ±25VR

COM_

ns

Enable Turn-On Time

Transition Time

500

130 350

t

TRANS

Figure 2

C, E

+25°C

10 60

V

NO_

= ±10V, RL = 1kΩ,

Figure 4

nst

BBM

Break-Before-Make Time Delay

UNITSMIN TYP MAXSYMBOLPARAMETER CONDITIONS TA

400

135 275

t

ON

µA-1 1IA_, I

EN

Input Logic Current

V0.8

V

A_L,

V

ENL

Input Logic Voltage Low

V2.4

V

A_H,

V

ENH

Input Logic Voltage High

µs2.5± Fault Recovery Time

ns20± Fault Response Time

COM_ On Clamp Output Resistance, Supplies On

kΩ

0.1 1.0 2.5

COM_ On Clamp Output Current, Supplies On

-13 -11 -7

mA

71013

I

COM_

µA

nA

-5 5

-20 20

I

NO_

NO_ Input Leakage Current, Supplies Off

I

NO_

NO_ Input Leakage Current, Supplies On

nA

-20 20

-200 200

V

NO_

= ±10V, RL= 1kΩ,

Figure 3

V

A_

= VEN= 0.8V or 2.4V

RL= 10kΩ, V

NO_

= ±25V

RL = 10kΩ, V

NO_

= ±25V

V

NO_

= ±40V, V

COM_

= 0,

V+ = 0, V- = 0

V

NO_

= ±25V, V

COM_

= –+10V,

V

EN

= 0

C, E

+25°C

C, E

+25°C

C, E

+25°C

110

CL= 1nF, V

NO_

= 0, RS= 0,

Figure 5

pCQ

Charge Injection (Note 7)

-62

RL= 50Ω, V

NO_

= 1V

RMS

,

f = 1MHz, Figure 6

dBV

ISO

Off-Isolation (Note 8)

V

NO_

= +25V V

COM_

= 0

0.08 3C, E

mVV- - 400 V+ + 400Fault Trip Threshold RL= 1kΩ

5f = 1MHz, Figure 8 pFC

NO_(OFF)

-53

NO_ Off-Capacitance

RL= 50Ω, V

NO_

= 1V

RMS

,

f = 1MHz, Figure 7

dB

6.5

V

CT

f = 1MHz, Figure 8

Channel-to-Channel Crosstalk (Note 9)

pFC

COM_(OFF)

COM_ Off-Capacitance

MAX4534

4

13.5

f = 1MHz, Figure 8

pFC

COM_(ON)

COM_ On-Capacitance

MAX4534

10.5

V

NO_

= -25V V

COM_

= 0

MAX4535

nsEnable Turn-Off Time

250

60 200

t

OFF

V

NO_

= ±10V, RL = 1kΩ,

Figure 3

C, E

+25°C

SWITCH DYNAMIC CHARACTERISTICS

LOGIC INPUT

MAX4534/MAX4535

Fault-Protected, High-Voltage, Single 4-to-1/Dual 2-to-1 Multiplexers

4 _______________________________________________________________________________________

UNITSMIN TYP MAXSYMBOLPARAMETER CONDITIONS T

A

10

0.01 1

I

GND

GND Supply Current

µA

225 400

I+V+ Supply Current

±4.5 ±20

All V

A_

= VEN= 0 or 15V

All V

A_

= VEN= 0 or 5V

C, E

+25°C

Power-Supply Range V+, V- V

600C, E

300C, E

µA

125 200

All V

A_

= VEN= 0, 5V, or 15V

+25°C

V

0V+

V

NO_

Fault-Free Analog Signal Range

I

NO_(OFF)

NO_ Off-Leakage Current (Notes 5, 10)

-10 10

nA

-0.5 0.01 0.5

Ω

10 25

∆R

ON

On-Resistance Match Between Channels (Note 5)

40

UNITSMIN TYP MAXSYMBOLPARAMETER

Applies with power on or off

V

COM_

= 10V, 1V;

V

NO_

= 1V, 10V

V

COM_

= 10V, I

NO_

= 500µA

CONDITIONS

C, E

+25°C

C, E

T

A

650 950

R

ON

1100

ΩOn-Resistance V

COM_

= 10V, I

NO_

= 500µA

+25°C

C, E

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(V+ = +15V, V- = -15V, V

A_H

= V

ENH

= 2.4V, V

A_L

= V

E

NL

= 0.8V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 3)

ELECTRICAL CHARACTERISTICS—Single +12V Supply

(V+ = +12V, V- = 0, V

A_H

= V

ENH

= 2.4V, V

A_L

= V

ENL

= 0.8V, TA= T

MIN

to T

MIN

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 3)

300

100 200

All V

A_

= VEN= 5V

C, E

+25°C

I

COM_(OFF)

COM_ Off-Leakage Current (Notes 5, 10)

-60 60 nA

-22

V

COM_

= 10V, 1V; V

NO_

= 1V,10V

C, E

+25°C

-30 30

-

11

C, E

+25°C

I

COM_(ON)

COM_ On-Leakage Current (Notes 5, 10)

-80 80 nA

-22

V

COM_

= 10V, 1V; V

NO_

= 10V,

1V, or floating

C, E

+25°C

-40 40

-11

C, E

+25°C

MAX4534

MAX4535

300C, E

125 200

I-V- Supply Current

All V

A_

= VEN= 0 or 15V

+25°C

POWER SUPPLY

µA

MAX4534/MAX4535

Fault-Protected, High-Voltage,

Single 4-to-1/Dual 2-to-1 Multiplexers

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)

(V+ = +12V, V- = 0, V

A_H

= V

ENH

= 2.4V, V

A_L

= V

ENL

= 0.8V, TA= T

MIN

to T

MIN

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 3)

210+25°C

CL= 1nF, V

NO_

= 0, RS= 0,

Figure 5

pC

ns

Enable Turn-On Time

100 250+25°C

V

COM_

= 10V, RL = 2kΩ, Figure 3

nst

OFF

Enable Turn-Off Time

350

Q

C, E

50 100+25°C

Charge Injection (Note 7)

V

COM_

= 10V, RL = 2kΩ, Figure 4

ns

-62

t

BBM

RL= 50Ω, V

NO_

= 1V

RMS,

f = 1MHz, Figure 6

Break-Before-Make Time Delay

dBV

ISO

Off-Isolation (Note 8)

700

220 500

t

ON

V

COM_

= 10V, RL = 2kΩ, Figure 3

C, E

+25°C

dB-65V

CT

Channel-to-Channel Crosstalk (Note 9)

RL= 50Ω, V

NO_

= 1V

RMS,

f = 1MHz, Figure 7

V

NO_

= 25VR

COM_

UNITSMIN TYP MAXSYMBOLPARAMETER CONDITIONS T

A

µA-1 1IA_, I

EN

Input Logic Current

V0.8

V

A_L,

V

ENL

Input Logic Voltage Low

V2.4

V

A_H,

V

ENH

Input Logic Voltage High

mVV- - 400 V+ + 400Fault Trip Threshold

COM_ ON Output Resistance, Supply On

kΩ2.4 6

COM_ ON Output Current, Supply On

nA235I

COM_

-20 20

V

-25 25

V

NO_

Fault-Protected Analog Signal Range (Note 6)

µA-5 5

-20 0.1 20

I

NO_

NO_ Input Leakage Current, Supply Off

I

NO_

NO_ Input Leakage Current, Supply On

-1 1

I

COM_

COM_ Output Leakage Current, Supply On

-20 20

-5 5

V

A_

= VEN= 0.8V or 2.4V

Applies with all power on

RL= 1kΩ

V

NO_

= ±40V, V+ = 0

V

NO_

= ±25V, V

COM_

= 0,

V

NO_

= ±25V,

V

COM

= 0

V

NO_

= 25V

+25°C

C, E

+25°C

C, E

+25°C

C, E

+25°C

µA

Applies with all power off -40 40

nA

µA

nA

FAULT PROTECTION

LOGIC INPUT

SWITCH DYNAMIC CHARACTERISTICS

ANALOG SWITCH

µA

MAX4534/MAX4535

Fault-Protected, High-Voltage, Single 4-to-1/Dual 2-to-1 Multiplexers

6 _______________________________________________________________________________________

Typical Operating Characteristics

(V+ = +15V, V- = -15V, TA= +25°C, unless otherwise noted.)

0

200

100

400

300

600

500

700

900

800

1000

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

ON-RESISTANCE vs.

V

COM

(DUAL SUPPLIES)

MAX4534 toc01

V

COM

(V)

R

ON

(Ω)

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

V+ = +10V V- = -10V

V+ = +20V

V- = -20V

V+ = +4.5V V- = -4.5V

0

200

100

400

300

600

500

700

900

800

1100

1000

0101552025303540

ON-RESISTANCE vs.

V

COM

(SINGLE SUPPLY)

MAX4534 toc02

V

COM

(V)

R

ON

(Ω)

V+ = +9V

V+ = +15V

V+ = +20V

V+ = +30V

V+ = +36V

V+ = +12V

0

200

100

400

300

500

600

-15 -5 0-10 5 10 15

ON-RESISTANCE vs. V

COM

AND

TEMPERATURE (DUAL SUPPLIES)

MAX4534 toc03

V

COM

(V)

R

ON

(Ω)

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

+125°C

+25°C

+70°C

-55°C

-40°C

+85°C

+25°C

All V

A__

= VEN= 0 or 12V

936

V+ Supply Current I+

75 150

µA

C, E

VV+Power-Supply Range

250

T

A

CONDITIONSPARAMETER SYMBOL MIN TYP MAX UNITS

ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)

(V+ = +12V, V- = 0, V

A_H

= V

ENH

= 2.4V, V

A_L

= V

ENL

= 0.8V, TA= T

MIN

to T

MIN

, unless otherwise noted. Typical values are at

T

A

= +25°C.) (Note 3)

Note 3: Algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 4: ∆RON= 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: NO_ pins are fault protected, and COM_ pins are not fault protected. The max input voltage, on NO_ pins, depends upon

the COM_ load configuration. Generally, the max input voltage is ±25V, with ±15V supplies, and a load referred to ground. For more detailed information, see the NO_ Input Voltage section.

Note 7: Guaranteed by design. Note 8: Off-isolation = 20 log10 (V

COM_

/ V

NO_

), V

COM_

= output, V

NO_

= input to off switch.

Note 9: Between any two analog inputs. Note 10: Leakage testing for single-supply operation is guaranteed by testing with dual supplies.

+25°C

All V

A__

= VEN= 5V

150 275

C, E 375

POWER SUPPLY

MAX4534/MAX4535

Fault-Protected, High-Voltage,

Single 4-to-1/Dual 2-to-1 Multiplexers

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(V+ = +15V, V- = -15V, TA= +25°C, unless otherwise noted.)

0

300

200

100

500

400

900

800

700

600

1000

02468101214

ON-RESISTANCE vs. V

COM

AND

TEMPERATURE (SINGLE SUPPLY)

MAX4534 toc04

V

COM

(V)

R

ON

(Ω)

V+ = +12V V- = 0

+125°C

-55°C

+70°C

-40°C

+85°C

+25°C

0.1p

1p

100p

10p

10n

100n

1n

1µ

-55 -5 20-30 45 70 95 120 145

LEAKAGE CURRENT vs. TEMPERATURE

MAX4508/09toc05

TEMPERATURE (°C)

LEAKAGE (A)

I

COM_OFF

I

COM_ON

I

NO_OFF

-3

-1

-2

1

0

3

2

4

-15 -5 0-10 5 10 15

CHARGE INJECTION vs. V

NO

(DUAL AND SINGLE SUPPLIES)

MAX4534 toc6

VNO (V)

Q (pC)

V+ = 12V V- = 0

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

0

100

50

200

150

250

300

350

400

±

4

±8 ±10±6 ±12 ±14 ±16 ±18 ±20

ENABLE ON/OFF-TIMES vs.

SUPPLY VOLTAGE (DUAL SUPPLIES)

MAX4534 toc07

SUPPLY VOLTAGE (V)

t

ON

, t

OFF

(ns)

t

ON

t

OFF

0

150

100

50

250

200

450

400

350

300

500

051015 20 25 30 35

ENABLE ON/OFF-TIMES vs.

SUPPLY VOLTAGE (SINGLE SUPPLY)

MAX4534 toc08

SUPPLY VOLTAGE (V)

t

ON

, t

OFF

(ns)

t

ON

t

OFF

0

60

40

20

100

80

180

160

140

120

200

-40 -20 0 20 40 60 80

ENABLE ON/OFF-TIMES

vs. TEMPERATURE

MAX4534 toc09

TEMPERATURE (°C)

t

ON

, t

OFF

(ns)

t

ON

t

OFF

-250

-100

-150

-200

0

-50

200

150

100

50

250

-40 -20 0 20 40 60 80

POWER-SUPPLY CURRENT vs.

TEMPERATURE (V

AO

= VA1 = VEN = 0)

MAX4534 toc10

TEMPERATURE (°C)

I+, I-, I

GND

(µA)

I+

I

GND

I-

-300

0

-100

-200

200

100

400

300

500

-40 -20 0 20 40 60 80

POWER-SUPPLY CURRENT vs.

TEMPERATURE (V

AO

= VA1 = VEN = 5V)

MAX4534 toc11

TEMPERATURE (°C)

I+, I-, I

GND

(µA)

I+

I

GND

I-

I+

0

100

50

150

250

200

300

046281012 14

POWER-SUPPLY CURRENT

vs. LOGIC VOLTAGE (V

A_

, VEN)

MAX4534 toc12

V

A_, VEN

(V)

+I, -I, GND (µA)

V+ = 12V V- = 0

MAX4534/MAX4535

Fault-Protected, High-Voltage, Single 4-to-1/Dual 2-to-1 Multiplexers

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V+ = +15V, V- = -15V, TA= +25°C, unless otherwise noted.)

-300

-100

-250

100

0

300

200

400

500

046281012 14

POWER-SUPPLY CURRENT

vs. LOGIC VOLTAGE (V

A_

, VEN)

MAX4534 toc13

V

A_, VEN

(V)

+I, -I, GND (µA)

I

GND

I-

I+

-110

-70

-90

-30

-50

-10

10

0.01 10.1 10 100 1000

FREQUENCY RESPONSE

MAX4534 toc14

FREQUENCY (MHz)

LOSS (dB)

BANDWIDTH

CROSSTALK

OFF-ISOLATION

0

0.5

1.0

1.5

2.0

2.5

3.0

0105152025303540

LOGIC-LEVEL THRESHOLD

vs. SUPPLY VOLTAGE

MAX4534toc15

SUPPLY VOLTAGE (V)

LOGIC-LEVEL THRESHOLD (V)

V- = 0

DUAL

SUPPLIES

SINGLE

SUPPLY

5µ

s/div

FAULT-FREE SIGNAL PERFORMANCE

IN_

10V/div

0

COM_

FAULT-FREE RAIL-TO-RAIL SIGNAL HANDLING WITH ±15V SUPPLIES

+15V

-15V

MAX4534toc16

5µs/div

INPUT OVERVOLTAGE vs. OUTPUT CLAMPING

IN_

0

COM_

±25V OVERVOLTAGE INPUT WITH THE OUTPUT CLAMPED AT ±15V

-15V

-25V 0

+25V

+15V

0

MAX4534toc17

MAX4534/MAX4535

Fault-Protected, High-Voltage,

Single 4-to-1/Dual 2-to-1 Multiplexers

Detailed Description

The MAX4534/MAX4535 differ considerably from traditional fault-protected multiplexers, offering several advantages. First, they are constructed with two parallel FETs, allowing very low resistance when the switch is on. Second, they allow signals on the NO_ pins that are within or beyond the supply rails to be passed through the switch to the COM terminal. This allows rail-

to-rail signal operation. Third, when a signal on VNO_ exceeds the supply rails (i.e., a fault condition), the voltage on COM_ is limited to the supply rails. Operation is identical for both fault polarities.

When the NO_ voltage goes beyond supply rails (fault condition), the NO_ input becomes high impedance regardless of the switch state or load resistance. When power is removed, and the fault protection is still in effect, the NO_ terminals are a virtual open circuit. The fault can be up to ±40V, with V+ = V- = 0. 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 source or sink up to 10mA.

The COM_ pins are not fault-protected. 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, damaging the device (see Absolute Maximum Ratings).

Figure 1 shows the internal construction, with the analog signal paths shown in bold. A single, normally open (NO) switch is shown. 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.

.

Pin Descriptions

Truth Tables

NAME FUNCTION

1 A0 Address Bit 0

2 EN Enable Input

3 V- Negative Supply Voltage

4 NO1 Channel Input 1 (fault protected)

10 NO4 Channel Input 4 (fault protected)

7 COM Analog Output

6, 8, 9 N.C. No connection

5 NO2 Channel Input 2 (fault protected)

14 A1 Address Bit 1

13 GND Ground

12 V+ Positive Supply Voltage

11 NO3 Channel Input 3 (fault protected)

MAX4534 (Single 4-to-1 Mux)

MAX4535 (Dual 2-to-1 Mux)

NAME FUNCTION

1 A0 Address Bit 0

2 EN Enable Input

3 V- Negative Supply Voltage

4 NO1A Channel Input 1A (fault protected)

8 COMB Mux Output B

7 COMA Mux Output A

6, 9, 14 N.C. No connection

5 NO2A Channel Input 2A (fault protected)

13 GND Ground

12 V+ Positive Supply Voltage

11 NO1B Channel Input 1B (fault protected)

10 NO2B Channel Input 2B (fault protected)

X X

0 0

0 1

1 0

1 1

0

1

None

NO1

NO2

NO3

NO4

A0A1 EN ON SWITCH

MAX4534 (Single 4-to-1 Mux)

MAX4535 (Dual 2-to-1 Mux)

_______________________________________________________________________________________ 9

X = Don’t care; logic 0: VAL≤ +0.8; logic 1: VAH≥ +2.4V

COMAEN COMBA0

NO2A

NO1A

None

1

0

NO2B1

NO1B0

NoneX

MAX4534/MAX4535

NO_ Input Voltage

The maximum allowable input voltage for safe operation depends on whether supplies are on or off and on the load configuration at the COM output. If COM is referred to a voltage other than ground, but within the supplies, VNO_ may range higher or lower than the supplies, provided the absolute value of VNO_ VCOM_ is less than 40V. For example, if the load is referred to +10V at COM_, then the NO_ voltage range can be from +50V to -30V. As another example, if the load is connected to -10V at COM_, the NO_ voltage range is limited to -50V to +30V.

If the supplies are ±15V and COM is referenced to ground through a load, the maximum NO_ voltage is ±36V. If the supplies are off and the COM output is referenced to ground, the maximum NO_ voltage is ±40V.

Normal Operation

Two comparators continuously compare the voltage on the NO_ pin with V+ and V- supply voltages. When the signal on NO_ is between V+ and V-, the multiplexer behaves normally, with FETs N1 and P1 turning on and

off in response to A_ signals (Figure 1). The parallel combination of N1 and P1 forms a low-value resistor between NO_ and COM_ so that signals pass equally well in either direction.

Positive Fault Condition

When the signal on NO_ exceeds V+ by about 150mV, the positive fault comparator output goes high, turning off FETs N1 and P1 (Figure 1). This makes the NO_ pin high impedance regardless of the switch state. If the switch state is “off,” all FETs turn off, and both NO_ and COM_ are high impedance. If the switch state is “on,” FET P2 turns on, clamping COM_ to V+.

Negative Fault Condition

When the signal on NO_ goes about 150mV below V-, the negative fault comparator output goes high, turning off FETs N1 and P1 (Figure 1). This makes the NO pin high impedance regardless of the switch state. If the switch state is “off,” all FETs turn off, and both NO_ and COM_ are high impedance. If the switch state is “on,” FET N2 turns on, clamping COM_ to V-.

Fault-Protected, High-Voltage, Single 4-to-1/Dual 2-to-1 Multiplexers

10 ______________________________________________________________________________________

NORMALLY OPEN SWITCH CONSTRUCTION

COM_

P2

MAX4534 MAX4535

P1

N1

ON

LOW

FAULT

HIGH

FAULT

V+

NO_

A_

GND

ESD DIODE

V-

N2

Figure 1. Functional Diagram

MAX4534/MAX4535

Fault-Protected, High-Voltage,

Single 4-to-1/Dual 2-to-1 Multiplexers

______________________________________________________________________________________ 11

Transient Fault Condition

When a fast rising or falling transient on NO_ exceeds V+ or V-, the output (COM_) follows the input (NO_) 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. For positive faults, the recovery time is typically 2.5µs. For negative faults, the recovery time is typically 1.3µs. These values depend on the COM_ output resistance and capacitance. The delays do not depend on the fault amplitude. Higher COM_ output resistance and capacitance increase the recovery times.

Non-Fault-Protected Pins

FETs N2 and P2 can source about ±10mA from V+ or V- to the COM_ pin in the fault condition (Figure 1). Ensure that if the COM_ pin is connected to a low impedance load, the 30mA absolute maximum current rating is never exceeded, both in normal and fault conditions.

The GND, COM_, EN, and A_ pins do not have fault protection. Reverse ESD protection diodes are internally connected between GND, COM_, A_, EN, and both V+ and V-. If a signal on GND, COM_, EN, or A_ exceeds V+ or V- by more than 300mV, one of these diodes will conduct. 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 NO_ pins is ±40V from ground when the power is off. With ±15V supply voltages, the highest voltage on NO_ can be V- + 40V, and the lowest voltage on NO_ can be V+ - 40V.

Caution: Exceeding these limits can damage the IC.

Logic-Level Thresholds

The logic-level thresholds are CMOS and TTL compatible with V+ = 4.5V to 16.5V.

Applications Information

Ground

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

Supply Current Reduction

When the logic signals are driven rail-to-rail from 0 to +15V or -15V to +15V, the current consumption will be reduced from 300µA (typ) to 180µA.

Power Supplies

The MAX4534/MAX4535 operate with bipolar supplies between ±4.5V and ±20V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the 44V absolute maximum rating.

The MAX4534/MAX4535 operate from single supplies between +9V and +36V when V- is connected to GND.

MAX4534/MAX4535

Fault-Protected, High-Voltage, Single 4-to-1/Dual 2-to-1 Multiplexers

12 ______________________________________________________________________________________

50%

t

OFF(EN)

tR < 20ns t

F

< 20ns

+3V

0

10V

LOGIC INPUT V

EN

SWITCH OUTPUT V

OUT

V+

V

OUT

V-

GND

V+

A1

V-

A0

EN

NO1

NO2–NO4

COM

+10V

50Ω

MAX4534

R

L

35pF

t

ON(EN)

V+

V

OUT

V-

GND

V+

V-

A0

EN

NO1B

NO1A, NO2A

NO2B, COMA

COMB

+10V

50Ω

MAX4535

R

L

35pF

V

EN

V

EN

90%90%

Figure 2. Address Transition Time

Figure 3. Enable Switching Time

Test Circuits/Timing Diagrams

50%

t

TRANS

tR < 20ns t

F

< 20ns

V

OUT

+3V

0

V

NO__

V

NO__

LOGIC INPUT V

A_

SWITCH OUTPUT

V+

V

OUT

V-

GND

V+

A1

V-

A0

EN

NO1

NO2, NO3

NO4

COM

+10V

-10V

MAX4534

R

L

35pF

V+

V

OUT

V-

GND

V+

A0

V-

EN

NO1B

NO1A, NO2A

NO2B

COMB

+10V

-10V

MAX4535

R

L

35pF

90%

t

TRANS

ON

+5V

MAX4534/MAX4535

Fault-Protected, High-Voltage,

Single 4-to-1/Dual 2-to-1 Multiplexers

______________________________________________________________________________________ 13

50%

t

OPEN

tR < 20ns t

F

< 20ns

+3V

0

LOGIC INPUT V

A

SWITCH OUTPUT V

OUT

V+

V

OUT

V-

GND

V+

A0

V-

A1

EN

NO1–NO4

COM

+10V

50Ω

MAX4534

R

L

35pF

80%

+3V

V

EN

Figure 4. MAX4534 Break-Before-Make Interval

Figure 5. Charge Injection

Figure 6. Off-Isolation

Figure 7. Crosstalk

Test Circuits/Timing Diagrams (continued)

V+

R

S

V

S

CHANNEL

SELECT

NO_

V

EN

A0

A1

V+

MAX4534

GND

+3V

LOGIC INPUT

0

V

COM

V-

C 1nF

V

OUT

L

EN

V

OUT

IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER

∆V

OUT

ERROR V

Q = ∆V

WHEN THE CHANNEL TURNS OFF.

CTE

OUT CL

OFFON ON

∆V

OUT

V

IN

= 50Ω

R

S

NO1

NO4

A0

A1

GND

MAX4534

EN

10nF

V+

10nF

V+

COM

V-

OFF-ISOLATION = 20log

10nF

V+

MAX4534

GND

EN

10nF

V+

COM

R

L

V-

50Ω

V-

CROSSTALK = 20log

V

OUT

V

OUT

V

IN

NO1

NO2

NO4

A0

A1

V

R

IN

1k

V

OUT

R

L

50Ω

V

OUT

IN

V

= 50Ω

R

S

MAX4534/MAX4535

Fault-Protected, High-Voltage, Single 4-to-1/Dual 2-to-1 Multiplexers

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.

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

V+

V-

GND

V+

A1

V-

A0

NO4

MAX4534

CHANNEL

SELECT

NO1

COM

EN

1MHz

CAPACITANCE

ANALYZER

Figure 8. NO_, COM_ Capacitance

Figure 9. Transient Behavior of Fault Condition

___________________Chip Information

TRANSISTOR COUNT: 265

Test Circuits/Timing Diagrams (continued)

+25V

VNO_

-15V

-25V

+15V

V

COM_

MAXIM MAX4534, MAX4535 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual