background image

_______________General Description

The MAX381/MAX383/MAX385 are precision, low-volt-

age analog switches. The single-pole single-throw

MAX381 and double-pole single-throw MAX385 dual

switches are normally open. The single-pole double-

throw MAX383 has two normally open and two normally

closed poles. All three parts offer low on-resistance

(less than 35

), guaranteed to match to within 2

between channels and to remain flat over the specified

analog signal range (4

max). They also offer low leak-

age (less than 250pA at +25°C and less than 2.5nA at

+85°C) and fast switching (turn-on time less than 175ns

and turn-off time less than 100ns).

The MAX381/MAX383/MAX385 are fabricated with

Maxim’s low-voltage silicon-gate process for high sys-

tem accuracy. Design improvements guarantee

extremely low charge injection (<5pC) and low power

consumption (<10µW).

These monolithic switches operate with a single posi-

tive supply (+3V to +15V) or with split supplies (±3V to

±8V) while retaining CMOS-logic input compatibility

and fast switching. CMOS inputs provide reduced input

loading.

________________________Applications

Sample-and-Hold Circuits

Military Radios

Test Equipment

Communication Systems

Heads-Up Displays

Battery-Operated Systems

Audio Signal Routing

PBX, PABX

Guidance and Control Systems

____________________________Features

o

Single-Supply Operation (+3V to +15V)

Bipolar-Supply Operation (±3V to ±8V)

o

Pin-Compatible with DG401/DG403/DG405

o

Low On-Resistance, 20

Typical (35

Max)

o

Guaranteed Matched On-Resistance Between

Channels, <2

o

Guaranteed Flat On-Resistance over Specified

Analog Signal Range, <4

o

Guaranteed Charge Injection, <5pC

o

Guaranteed Off-Channel Leakage, <2.5nA at +85°C

o

TTL/CMOS-Logic Compatible with 3V, 5V, ±3V,

and ±5V Supplies

o

Rail-to-Rail Analog Signal Handling Capability

______________Ordering Information

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

________________________________________________________________

Maxim Integrated Products

1

MAX383

LOGIC IN

COM

0

1

NC

NO

TOP VIEW

MAX381

LOGIC IN

SWITCH

0

1

OFF

ON

MAX385

LOGIC IN

COM, NO

0

1

OFF

ON

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

NO1 

IN1

V-

GND

NO3

COM3

N.C.

COM1

MAX385

N.C.

V+

IN2

NO2

COM2

N.C.

COM4

NO4

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

NO1

IN1

V-

GND

N.C.

N.C.

N.C.

COM1

MAX381

N.C.

V+

IN2

NO2

COM2

N.C.

N.C.

N.C.

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

NO1

IN1

V-

GND

NC3

COM3

N.C.

COM1

MAX383

N.C.

V+

IN2

N02

COM2

N.C.

COM4

NC4

NC

NO

COM

OFF

OFF

COM

PWR OFF

OFF

OFF

OFF

PWR OFF

OFF

PWR OFF

OFF

N.C. = NOT INTERNALLY

CONNECTED

___________________________Pin Configurations/Block Diagrams/Truth Tables

Call toll free 1-800-998-8800 for free samples or literature.

19-0300; Rev 0; 9/94

Ordering Information continued on last page.

* Dice are tested at T

A

= +25°C only.

** Contact factory for package availability.

16 CERDIP**

-55°C to +125°C

MAX381MJE

16 CERDIP**

-40°C to +85°C

MAX381EJE

16 Narrow SO

-40°C to +85°C

MAX381ESE

16 Plastic DIP

-40°C to +85°C

MAX381EPE

Dice*

0°C to +70°C

MAX381C/D

16 Narrow SO

0°C to +70°C

MAX381CSE

16 Plastic DIP

0°C to +70°C

MAX381

CPE

PIN-PACKAGE

TEMP. RANGE

PART

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MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

2

_______________________________________________________________________________________

Voltage Referenced to GND

V+ .......................................................................-0.3V to +17V

V- ........................................................................+0.3V to -17V

V+ to V-...............................................................-0.3V to +17V

COM_, NO_, NC_, IN_ ................(V- - 2V) to (V+ + 2V) or 30mA,

whichever occurs first

Continuous Current, any pin ...............................................30mA

Peak Current, any pin

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

Continuous Power Dissipation (T

A

= +70°C) 

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

MAX38_C_ E .......................................................0°C to +70°C

MAX38_E_ E ....................................................-40°C to +85°C

MAX38_MJE ..................................................-55°C to +125°C

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

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

ELECTRICAL CHARACTERISTICS—Dual Supplies

(V+ = +5V ±10%, V- = -5V ±10%, GND = 0V, V

INH

= 2.4V, V

INL

= 0.8V, T

A

= T

MIN

to T

MAX

, unless otherwise noted.)

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:

Signals on NC, NO, COM, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to 

maximum current rating.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

MIN

TYP

MAX

(Note 2)

UNITS

On-Resistance

R

ON

C, E, M

20

35

0.5

2

On-Resistance Match Between

Channels (Note 4)

R

ON

Analog Signal Range

V

COM

,

V

NO

V

NC

V-

V+

V

On-Resistance Flatness 

(Note 4)

R

FLAT(ON)

4

-0.2

-0.01

0.2

NC or NO Off Leakage Current

(Note 5)

I

NC(OFF)

or

I

NO(OFF)

nA

-2.5

2.5

V

NC or 

V

NO

= 3V, 0V,

-3V;  I

COM

= -10mA,

V+ = 5V; V- = -5V

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

V

NC or 

V

NO

= ±3.5V,

I

COM

= -10mA,

V

INH

= 2.4V, 

V

INL

= 0.8V

V

NC or 

V

NO

= ±3V,

I

COM

= -10mA,

V+ = 5V, V- = -5V

V

COM

= ±4.5V,

V

NC

or V

NO

= +4.5V,

V+ = 5.5V,V- = -5.5V

(Note 3)

T

A

=

+25°C

T

A

=

+25°C

T

A

=

+25°C

T

A

= T

MIN

to T

MAX

T

A

=

+25°C

T

A

= T

MIN

to T

MAX

C, E

T

A

= T

MIN

to T

MAX

T

A

= T

MIN

to T

MAX

M

4

6

-5.0

5.0

C, E

M

20

30

CONDITIONS

TEMP.

RANGE

C, E, M

C, E, M

C, E, M

C, E, M

C, E

-0.1

-0.01

0.1

M

-0.2

-0.01

0.2

COM Off Leakage Current

(Note 5)

I

COM(OFF)

nA

-2.5

2.5

V

COM

= ±4.5V,

V

NC

or V

NO

= +4.5V,

V+ = 5.5V, V- = -5.5V

T

A

=

+25°C

T

A

= T

MIN

to T

MAX

C, E

M

-5.0

5.0

C, E

-0.1

-0.01

0.1

M

-0.4

-0.04

0.4

COM On Leakage Current

(Note 5)

I

COM(ON)

nA

-5.0

5.0

V

COM

= ±4.5V,

V

NC

or V

NO

= ±4.5V,

V+ = 5.5V, V- = -5.5V

T

A

=

+25°C

T

A

= T

MIN

to T

MAX

C, E

M

-20.0

20.0

C, E

-0.2

-0.04

0.2

M

SWITCH

45

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MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(V+ = +5V ±10%, V- = -5V ±10%, GND = 0V, V

INH

= 2.4V, V

INL

= 0.8V, T

A

= T

MIN

to T

MAX

, unless otherwise noted.)

PARAMETER

SYMBOL

MIN

TYP

MAX

(Note 2)

UNITS

Input Current with Input

Voltage High

I

INH

-1.0

0.005

1.0

µA

CONDITIONS

V

IN

= 2.4V, all others = 0.8V

Input Current with Input

Voltage Low

I

INL

-1.0

0.005

1.0

µA

V

IN

= 0.8V, all others = 2.4V

Turn-On Time

t

ON

100

175

ns

Charge Injection

(Note 3)

V

CTE

2

5

pC

C

L

= 1.0nF, V

GEN

= 0V,

R

GEN

= 0

, Figure 4

T

A

= +25°C

T

A

= T

MIN

to T

MAX

225

V

COM

= 3V, Figure 2

T

A

= +25°C

T

A

= T

MIN

to T

MAX

150

V

COM

= 3V, Figure 2

Turn-Off Time

t

OFF

60

100

ns

Power-Supply Range

MAX383 only, Figure 3

Break-Before-Make

Time Delay (Note 3)

t

D

10

20

ns

T

A

= +25°C

T

A

= +25°C

R

L

= 100

, C

L

= 5pF,

f = 1MHz, Figure 5

Off Isolation (Note 6)

V

ISO

72

dB

T

A

= +25°C

R

L

= 50

, C

L

= 5pF,

f = 1MHz, Figure 6

Crosstalk (Note 7)

V

CT

90

dB

T

A

= +25°C

f = 1MHz, Figure 7

Off Capacitance

C

OFF

12

pF

T

A

= +25°C

f = 1MHz, Figure 7

COM Off Capacitance

C

COM(OFF)

12

pF

T

A

= +25°C

f = 1MHz, Figure 8

Channel On Capacitance C

COM(ON)

pF

±3

±8

V

Positive Supply Current

39

I+

All channels on or off,

V+ = 5.5V, V- = -5.5V, V

IN

= 0V or V+

-1.0

0.06

1.0

µA

Negative Supply

Current

I-

All channels on or off,

V+ = 5.5V, V- = -5.5V, V

IN

= 0V or V+

-1.0

-0.01

1.0

µA

Logic High Input Voltage

V

AH

2.4

V

Logic Low Input Voltage

V

AL

0.8

V

T

A

= T

MIN

to T

MAX

T

A

= T

MIN

to T

MAX

Note 2:

The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in

this data sheet.

Note 3:

Guaranteed by design.

Note 4:

R

ON

R

ON

(max) - 

R

ON

(min). On-resistance match between channels and flatness are guaranteed only with 

specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as 

measured over the specified analog signal range.

Note 5:

Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temperature.

Note 6:

See Figure 4. Off isolation = 20log

10

V

COM

/V

NC

or V

NO

, V

COM

= output, V

NC

or 

NO

= input to off switch.

Note 7:

Between any two switches. See Figure 5.

Note 8:

Leakage testing at single supply is guaranteed by testing with dual supplies.

T

A

= +25°C

DIGITAL LOGIC INPUT

SUPPLY

DYNAMIC

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MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—Single +5V Supply

(V+ = +5V ±10%, V- = 0V, GND = 0V, V

INH

= 2.4V, V

INL

= 0.8V, T

A

= T

MIN

to T

MAX

, unless otherwise noted.)

PARAMETER

SYMBOL

MIN

TYP

MAX

(Note 2)

UNITS

Analog Signal Range

V

COM,

V

NO,

V

NC

0V

V+

V

(Note 3)

On-Resistance

R

ON

25

65

V+ = 5.0V, V- = 0V,

V

NC or 

V

NO

= 3.5V,

I

COM

= 1.0mA,

V

INH

= 2.4V, 

V

INL

= 0.8V

On-Resistance Match

Between Channels (Note 4)

R

ON

V

NC or 

V

NO

= 3V,

I

COM

= 1.0mA,

V+ = 5V

On-Resistance Flatness

(Note 4)

R

FLAT(ON)

V

NC or 

V

NO

= 3V, 2V,

1V; I

COM

= 1.0mA;

V+ = 5V; V- = 0V

NC or NO Off Leakage 

Current (Note 8)

I

NC(OFF)

or

I

NO(OFF)

-0.2

-0.01

0.2

nA

V

COM

= 0V,

V

NC

or V

NO

= 4.5V,

V+ = 5.5V, V- = 0V

COM Off Leakage Current

(Note 8)

I

COM(OFF)

-0.2

-0.01

0.2

nA

V

COM

= 4.5V,

V

NC

or V

NO

= 0V,

V+ = 5.5V, V- = 0V

COM On Leakage Current

(Note 8)

I

COM(ON)

-0.4

-0.04

0.4

nA

V

COM

= 4.5V,

V

NC

or V

NO

= 4.5V,

V+ = 5.5V, V- = 0V

T

A

= +25°C

T

A

= +25°C

T

A

= T

MIN

to T

MAX

75

-2.5

2.5

-5.0

5.0

T

A

= T

MIN

to T

MAX

T

A

= T

MIN

to T

MAX

T

A

= T

MIN

to T

MAX

C, E

M

C, E

M

C, E

M

-5.0

5.0

-2.5

2.5

-20.0

20.0

-5.0

5.0

M

C, E

T

A

= +25°C

-0.2

-0.04

0.2

C, E

M

C, E

M

-0.1

-0.01

0.1

-0.1

-0.01

0.1

T

A

= T

MIN

to T

MAX

T

A

= +25°C

T

A

= T

MIN

to T

MAX

T

A

= +25°C

T

A

= +25°C

C, E, M

C, E

M

C, E, M

8

C, E, M

6

C, E, M

4

C, E, M

0.5

2

60

CONDITIONS

TEMP.

RANGE

Input Current with Input

Voltage High

I

INH

µA

V

IN

= 2.4V, all others = 0.8V

-1.0

0.005

1.0

Input Current with Input

Voltage Low

I

INL

µA

V

IN

= 0.8V, all others = 2.4V

-1.0

0.005

1.0

SWITCH

DIGITAL LOGIC INPUT

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MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

_______________________________________________________________________________________

5

ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)

(V+ = +5V ±10%, V- = 0V, GND = 0V, V

INH

= 2.4V, V

INL

= 0.8V, T

A

= T

MIN

to T

MAX

, unless otherwise noted.)

ELECTRICAL CHARACTERISTICS—Single +3.3V Supply

(V+ = 3.0V to 3.6V, GND = 0V, V

INH

= 2.4V, V

INL

= 0.8V, T

A

= T

MIN

to T

MAX

, unless otherwise noted.)

PARAMETER

SYMBOL

MIN

TYP

MAX

(Note 2)

UNITS

Turn-On Time

t

ON

160

250

ns

CONDITIONS

V

COM

= 3V, Figure 2

Turn-Off Time

t

OFF

ns

Positive Supply Current

I+

-1.0

0.01

1.0

µA

V

COM

= 3V, Figure 2

All channels on or off, V

IN

= 0V or V+,

V+ = 5.5V, V- = 0V

60

125

PARAMETER

SYMBOL

MIN

TYP

MAX

(Note 2)

UNITS

Analog Signal Range

V

COM,

V

NO,

V

NC

0V

V+

V

CONDITIONS

(Note 3)

On-Resistance

R

ON

75

185

V+ = 3V, V- = 0V,

V

NC or 

V

NO

= 1.5V,

I

COM

= 1.0mA,

V

INH

= 2.4V, 

V

INL

= 0.8V

-0.2

-0.04

0.2

M

T

A

= +25°C

T

A

= +25°C

C, E

-5.0

5.0

NC or NO Off Leakage 

Current (Note 8)

I

NC(OFF)

or

I

NO(OFF)

-0.2

-0.01

0.2

nA

V

COM

= 0V,

V

NC

or V

NO

= 3V,

V+ = 3.6V, V- = 0V

COM Off Leakage Current

(Note 8)

I

COM(OFF)

-0.2

-0.01

0.2

nA

V

COM

= 3V,

V

NC

or V

NO

= 0V,

V+ = 3.6V, V- = 0V

COM On Leakage Current

(Note 8)

I

COM(ON)

-0.4

-0.04

0.4

nA

V

COM

= 3V,

V

NC

or V

NO

= 3V,

V+ = 3.6V, V- = 0V

-2.5

2.5

-20.0

20.0

-2.5

2.5

-5.0

5.0

T

A

= T

MIN

to T

MAX

T

A

= T

MIN

to T

MAX

T

A

= T

MIN

to T

MAX

C, E

M

C, E

M

C, E

M

-5.0

5.0

C, E

M

T

A

= +25°C

C, E

M

-0.1

-0.01

0.1

-0.1

-0.01

0.1

C, E

T

A

= T

MIN

to T

MAX

T

A

= +25°C

M

C, E, M

250

175

SWITCH

TEMP.

RANGE

Power-Supply Range

V+

V

2.7

16

Break-Before-Make Time

Delay (Note 3)

t

D

10

20

ns

MAX383 only

Charge Injection

(Note 3)

V

CTE

pC

C

L

= 1.0nF, V

GEN

= 0V, 

R

GEN

= 0

2

5

T

A

= +25°C

T

A

= +25°C

T

A

= +25°C

T

A

= +25°C

T

A

= T

MIN

to T

MAX

T

A

= T

MIN

to T

MAX

300

175

Negative Supply Current

I-

-1.0

-0.01

1.0

µA

All channels on or off, V

IN

= 0V or V+,

V+ = 5.5V, V- = 0V

DYNAMIC

SUPPLY

background image

2

10

6

ON-RESISTANCE vs. V

COM

AND SINGLE-SUPPLY VOLTAGE

MAX381/3/5-03

V

COM

 (V)

R

ON

 (

)

14

0

4

12

8

16

10

70

60

50

40

110

120

100

90

80

30

20

0

V+ = 2.5V

V+ = 3V

V+ = 5V

V- = 0V

V+ = 9V

V+ = 12V

V+ = 15V

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

6

_______________________________________________________________________________________

-6

2

-2

ON-RESISTANCE vs. V

COM

AND DUAL-SUPPLY VOLTAGES

MAX381/3/5-01

V

COM

 (V)

R

ON

 (

)

6

-8

-4

4

0

8

5

35

30

25

20

15

10

0

V+ = 3V, V- = -3V

V+ = 5V, V- = -5V

V+ = 8V, V- = -8V

__________________________________________Typical Operating Characteristics

(T

A

= +25°C, unless otherwise noted.)

-5

-3

1

-1

5

ON-RESISTANCE vs. V

COM

 AND

TEMPERATURE (DUAL SUPPLIES)

MAX381/3/5-02

V

COM

 (V)

R

ON

 (

)

3

-4

-2

2

0

4

5

35

30

25

20

15

10

0

T

A

 = +125°C

V+ = 5V

V- = -5V

T

A

 = +85°C

T

A

 = +25°C

T

A

 = -55°C

PARAMETER

SYMBOL

MIN

TYP

MAX

(Note 2)

UNITS

CONDITIONS

Input Current with Input

Voltage Low

I

INL

µA

Negative Supply Current

I-

-1.0

-0.01

1.0

µA

Positive Supply Current

I+

-1.0

0.01

1.0

µA

All channels on or off, V

IN

= 0V or V+,

V+ = 3.6V, V- = 0V

All channels on or off, V

IN

= 0V or V+,

V+ = 3.6V, V- = 0V

V

IN

= 0.8V, all others = 2.4V

-1.0

0.005

1.0

ELECTRICAL CHARACTERISTICS—Single +3.3V Supply (continued)

(V+ = 3.0V to 3.6V, GND = 0V, V

INH

= 2.4V, V

INL

= 0.8V, T

A

= T

MIN

to T

MAX

, unless otherwise noted.)

Power-Supply Range

V+

2.7

16

V

Input Current with Input

Voltage High

I

INH

µA

V

IN

= 2.4V, all others = 0.8V

-1.0

0.005

1.0

Turn-On Time (Note 3)

t

ON

400

ns

V

COM

= 1.5V, Figure 2

Turn-Off Time (Note 3)

t

OFF

150

ns

V

COM

= 1.5V, Figure 2

T

A

= +25°C

T

A

= +25°C

T

A

= +25°C

T

A

= +25°C

Break-Before-Make Time

Delay (Note 3)

Charge Injection (Note 3)

V

CTE

1

5

pC

C

L

= 1.0nF, 

V

GEN

= 0V, R

GEN

= 0

t

D

10

20

ns

MAX383 only

DIGITAL LOGIC INPUT

DYNAMIC

SUPPLY

background image

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

_______________________________________________________________________________________

7

0

1

3

2

5

ON-RESISTANCE vs. V

COM

 AND

TEMPERATURE (SINGLE SUPPLY)

MAX381/3/5-04

V

COM

 (V)

R

ON

 (

)

4

10

70

60

50

40

30

20

T

= +85°C

T

= +25°C

T

= -55°C

T

= +125°C

   

V+ = 5V

V- = 0V

0

0.0001

-75

OFF LEAKAGE CURRENT vs.

TEMPERATURE

10

MAX381-05

TEMPERATURE (°C)

OFF LEAKAGE (nA)

+25

+125

0.1

0.001

1

0.01

100

V+ = 5.5V, V- = -5.5V

-25

+75

0.0001

-75

ON LEAKAGE CURRENT vs.

TEMPERATURE

10

MAX381-06

TEMPERATURE (°C)

ON LEAKAGE (nA)

+25

+125

0.1

0.001

1

0.01

100

V+ = 5.5V, V- = -5.5V

-25

+75

-5

-3

1

-1

5

CHARGE INJECTION

 vs. V

COM

 

MAX381/3/5-07

V

COM

 (V)

Q (pC)

3

-4

-2

2

0

4

-20

30

20

10

0

-10

-30

V+ = 5V

V- = -5V

V+ = 5V

V- = 0V

0.0001

-75

SUPPLY CURRENT vs. TEMPERATURE

10

MAX381-08

TEMPERATURE (°C)

I+, I- (

µ

A)

+25

+125

0.1

0.001

1

0.01

100

  I- at V- = -5.5V 

 I+ at V+ = 5.5V 

0.00001

0.001

0.01

0.1

1

10

100 1000

MAX383 SUPPLY CURRENT vs. LOGIC INPUT

FREQUENCY (BOTH INPUTS DRIVEN)

MAX381/3/5-09

INPUT FREQUENCY (kHz)

SUPPLY CURRENT (

µ

A)

0.0001

0.001

1000

100

10

1

0.1

0.01

0.0001

0.00001

V+ = 5V

V+ = 3V

____________________________Typical Operating Characteristics (continued)

(T

= +25°C, unless otherwise noted.)

0

1

3

2

5

MAX383 SUPPLY CURRENT vs. LOGIC

INPUT VOLTAGE (BOTH INPUTS DRIVEN)

MAX381/3/5-10

V

IN

 (V)

SUPPLY CURRENT (

µ

A)

4

0.5

1.5

3.5

2.5

4.5

0.001

1000

100

10

1

0.1

0.01

0.0001

V+ = 3V

V+ = 5V

background image

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

8

_______________________________________________________________________________________

__________Applications Information

Operation with Supply Voltages 

Other than ±5V

The MAX381/MAX383/MAX385 switches operate with

±3.0V to ±8V bipolar supplies and a +3V to +15V single

supply. In either case, analog signals ranging from V+ to

V- can be switched. The 

Typical Operating Characteristics

graphs show the typical on-resistance variation with ana-

log signal and supply voltage. The usual on-resistance

temperature coefficient is 0.5%/°C (typ).

Overvoltage Protection 

Proper power-supply sequencing is recommended for

all CMOS devices. Do not exceed the absolute maxi-

mum ratings, because stresses beyond the listed rat-

ings can cause permanent damage to the devices.

Always sequence V+ on first, then V-, followed by the

logic inputs, NO, or COM. If power-supply sequencing

is not possible, add two small signal diodes (D1, D2) in

series with supply pins for overvoltage protection

(Figure 1). Adding diodes reduces the analog signal

range to one diode drop below V+ and one diode drop

above V-, but does not affect the devices’ low switch

resistance and low leakage characteristics. Device

operation is unchanged, and the difference between

V+ and V- should not exceed 17V. These protection

diodes are not recommended when using a single 3V

supply.

______________________________________________________________Pin Description

COM

V-

V+

NO

* INTERNAL PROTECTION DIODES

D2

D1

-5V

+5V

MAX381

MAX383

MAX385

*

*

*

*

Figure 1. Overvoltage Protection Using Two External Blocking

Diodes

1, 8

COM_

Analog Switch Common Terminal

2–7, 12

N.C.

Not Internally Connected

9, 16

NO_

Analog Switch Normally Open Terminal

NC_

Analog Switch Normally Closed Terminal

10, 15

IN_*

Logic Level Input (Normally Low)

11

V+

Analog Signal and Logic Positive Supply Input

14

V-

Analog Signal Negative Supply Input

NAME

FUNCTION

MAX381

1, 3, 6, 8

2, 7, 12

9, 16

4, 5

10, 15

11

14

MAX383

1, 3, 6, 8

2, 7, 12

4, 5, 9, 16

10, 15

11

14

MAX385

PIN

13

GND

Logic Negative Supply Input (Ground)

13

13

* IN1 controls COM1 and COM3; IN2 controls COM2 and COM4.

background image

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

_______________________________________________________________________________________

9

V

GEN

GND

C

L

1.0nF

V

OUT 

0V

-5V

V-

V+

R

GEN

V

OUT

 

IN

ON

OFF

ON

V

OUT

Q = (

V

OUT

) (C

L

)

+5V

COM

NC or NO

MAX381

MAX383

MAX385

Figure 4. Charge-Injection Test Circuit

50%

t

OFF

t

r

 < 20ns

t

f

 < 20ns

V

OUT

V

OUT

t

ON

0.9 x V

OUT

0.9 x V

OUT

+3V

0V

0V

LOGIC

INPUT

SWITCH

OUTPUT

LOGIC INPUT WAVEFORM IS INVERTED FOR

SWITCHES THAT HAVE THE OPPOSITE LOGIC 

SENSE CONTROL.

+5V

V

OUT

R

L

 = 1000

C

L

 = 35pF

-5V

REPEAT TEST FOR EACH SWITCH

0V

GND

LOGIC

INPUT

V

COM

 = +3V (for t

ON

)

V

COM

 = -3V (for t

OFF

)

FOR LOAD CONDITIONS, SEE 

Electrical Characteristics.

C

L

 INCLUDES FIXTURE AND STRAY CAPACITANCE.

V

OUT

 = V

COM  

R

L

R

L

 + R

ON

V+

V-

COM

IN

NC or NO

(            )

MAX381

MAX383

MAX385

50%

V

OUT1

V

OUT2

0.9 x V

OUT

+3V

0V

0V

LOGIC

INPUT

SWITCH

OUTPUT 1

SWITCH

OUTPUT 2

+5V

V+

V-

-5V

C

L

 INCLUDES FIXTURE AND STRAY CAPACITANCE.

LOGIC 0 INPUT

0V

GND

LOGIC

INPUT

0V

0.9 x V

OUT

t

D

t

D

IN

R

L2

C

L2

V

OUT2

R

L1

V

OUT1

C

L1

R

L

 = 1000

C

L

 = 35pF

COM

COM

NC

NO

MAX383

V

COM

 = +3V

V

COM

 = +3V

Figure 2. Switching-Time Test Circuit

Figure 3. Break-Before-Make Test Circuit (MAX383 only)

______________________________________________Test Circuits/Timing Diagrams

background image

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

10

______________________________________________________________________________________

IN

0V or 2.4V

SIGNAL

GENERATOR

+5V

C

V+

ANALYZER

CH A

CH B

NC or NO

R

L

GND

V

COM

C

-5V

FREQUENCY

TESTED

1MHz

SIGNAL

GENERATOR

AUTOMATIC

SYNTHESIZER

ANALYZER

TRACKING

SPECTRUM

ANALYZER

OFF ISOLATION =   20log

V

COM

   V

NC

 or NO

V-

MAX381

MAX383

MAX385

Figure 5. Off Isolation 

IN2

0V or 2.4V

SIGNAL

GENERATOR

+5V

C

ANALYZER

CH A

CH B

R

L

GND

C

V-

-5V

FREQUENCY

TESTED

1MHz

SIGNAL

GENERATOR

AUTOMATIC

SYNTHESIZER

ANALYZER

TRACKING

SPECTRUM

ANALYZER

0V or 2.4V

IN

50

V+

COM

COM

NC or NO

NC OR NO

MAX381

MAX383

MAX385

Figure 6. Crosstalk Test Circuit 

_________________________________Test Circuits/Timing Diagrams (continued)

V-

CAPACITANCE

METER

GND

C

-5V

IN

0V or 2.4V

C

+5V

V+

COM

MAX381

MAX383

MAX385

Figure 8. Channel-On Capacitance 

V-

CAPACITANCE

METER

GND

C

-5V

IN

0V or 2.4V

C

+5V

V+

NC

or NO

COM

MAX381

MAX383

MAX385

Figure 7. Channel-Off Capacitance

background image

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

______________________________________________________________________________________

11

__Ordering Information (continued)

*  Dice are tested at T

A

= +25°C only.

** Contact factory for package availability.

16 CERDIP**

-55°C to +125°C

MAX383MJE

16 CERDIP**

-40°C to +85°C

MAX383EJE

16 Narrow SO

-40°C to +85°C

MAX383ESE

16 Plastic DIP

-40°C to +85°C

MAX383EPE

Dice*

0°C to +70°C

MAX383C/D

16 Narrow SO

0°C to +70°C

MAX383CSE

16 Plastic DIP

0°C to +70°C

MAX383

CPE

PIN-PACKAGE

TEMP. RANGE

PART

MAX385

CPE

0°C to +70°C

16 Plastic DIP

MAX385CSE

0°C to +70°C

16 Narrow SO

MAX385C/D

0°C to +70°C

Dice*

MAX385EPE

-40°C to +85°C

16 Plastic DIP

MAX385ESE

-40°C to +85°C

16 Narrow SO

MAX385EJE

-40°C to +85°C

16 CERDIP**

MAX385MJE

-55°C to +125°C

16 CERDIP**

___________________Chip Topography

V-

COM4

(MAX383/MAX385)

0.096"

(2.44mm)

0.067"

(1.7mm)

COM2

NO2

IN2

V+

COM3

(MAX383/MAX385)

COM1

NO1

IN1

 NC3

(MAX383)

NO3

(MAX385)

 NC4

(MAX383)

NO4

(MAX385)

GND

TRANSISTOR COUNT:  57

SUBSTRATE CONNECTED TO V+

background image

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12

__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA  94086 (408) 737-7600

© 1994 Maxim Integrated Products 

Printed USA

is a registered trademark of Maxim Integrated Products.

MAX381/MAX383/MAX385

Precision, Low-Voltage Analog Switches

________________________________________________________Package Information

L

DIM

A

A1

B

C

D

E

e

H

h

L

α

MIN

0.053

0.004

0.014

0.007

0.386

0.150

0.228

0.010

0.016

MAX

0.069

0.010

0.019

0.010

0.394

0.157

0.244

0.020

0.050

MIN

1.35

0.10

0.35

0.19

9.80

3.80

5.80

0.25

0.40

MAX

1.75

0.25

0.49

0.25

10.00

4.00

6.20

0.50

1.27

INCHES

MILLIMETERS

α

16-PIN PLASTIC

SMALL-OUTLINE

(NARROW)

PACKAGE

H

E

D

e

A

A1

C

h x 45˚

0.127mm

0.004in.

B

1.27 BSC

0.050 BSC

21-588B

C

A

A2

E1

D

E

e

A

e

B

A3

B1

B

DIM

A

A1

A2

A3

B

B1

C

D

D1

E

E1

e

e

A

e

B

L

α

MIN

0.015

0.125

0.055

0.016

0.050

0.008

0.745

0.005

0.300

0.240

0.115

MAX

0.200

0.150

0.080

0.022

0.065

0.012

0.765

0.030

0.325

0.280

0.400

0.150

15˚

MIN

0.38

3.18

1.40

0.41

1.27

0.20

18.92

0.13

7.62

6.10

2.92

MAX

5.08

3.81

2.03

0.56

1.65

0.30

19.43

0.76

8.26

7.11

10.16

3.81

15˚

INCHES

MILLIMETERS

2.54 BSC

7.62 BSC

0.100 BSC

0.300 BSC

A1

L

D1

e

21-587A

α

16-PIN PLASTIC

DUAL-IN-LINE

PACKAGE