MAXIM DG444, DG445 User Manual

General Description

Maxim’s redesigned DG444/DG445 analog switches
now feature on-resistance matching (4Ω max) between
switches and guaranteed on-resistance flatness over
the signal range (9Ω max). These low on-resistance
switches conduct equally well in either direction. They
guarantee low charge injection (10pC max), low power
consumption (35µW max), and an electrostatic dis­charge (ESD) tolerance of 2000V (min) per Method

3015.7. The new design offers lower off-leakage current
over temperature (less than 5nA at +85°C).

The DG444/DG445 are quad, single-pole/single-throw
(SPST) analog switches. The DG444 has four normally
closed switches and the DG445 has four normally open
switches. Switching times are less than 250ns for t

ON

and less than 70ns for t

OFF

. Operation is from a single
+10V to +30V supply, or bipolar ±4.5V to ±20V sup­plies. Maxim’s improved DG444/DG445 continue to be
fabricated with a 44V silicon-gate process.

________________________Applications

New Features

♦ Plug-In Upgrades for Industry-Standard DG444/DG445
♦ Improved RONMatch Between Channels (4Ω max)
♦ Guaranteed R

FLAT(ON)

Over Signal Range (9Ω max)

♦ Improved Charge Injection (10pC max)
♦ Improved Off-Leakage Current Over Temperature

(< 5nA at +85°C)

♦ Withstand ESD (2000V min)

per Method 3015.7

Existing Features

♦ Low R

DS(ON)

(85Ω max)

♦ Single-Supply Operation +10V to +30V

Bipolar-Supply Operation ±4.5V to ±20V

♦ Low Power Consumption (35µW max)
♦ Rail-to-Rail Signal Handling
♦ TTL/CMOS-Logic Compatible

Ordering Information

DG444/DG445

Improved, Quad, SPST Analog Switches

________________________________________________________________ Maxim Integrated Products 1

DIP/SO

SWITCHES SHOWN FOR LOGIC "0" INPUT

DG444

LOGIC SWITCH

0
1

ON

OFF

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

IN2

D2

S2

V+

V-

S1

D1

IN1

DG444

V

L

S3

D3

IN3

IN4

D4

S4

GND

TOP VIEW

16D115

IN1

14

IN2

13

D2

5D46

IN4

7

IN3

8

D3

DG444

2V-

1S1

3GND

4

S4

11 V+

12 S2

10 V

L

9

S3

Thin QFN

19-4705; Rev 4; 6/04

Pin Configurations/Functional Diagrams/Truth Tables

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

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.

Pin Configurations continued at end of data sheet.

Sample-and-Hold Circuits

Test Equipment

Heads-Up Displays

Guidance and Control
Systems

Military Radios

Communication Systems

Battery-Operated Systems

PBX, PABX

Audio Signal Routing

Modems/Faxes

PART TEMP RANGE PIN-PACKAGE

DG444CJ 0°C to +70°C 16 Plastic DIP

DG444CY 0°C to +70°C 16 Narrow SO

DG444C/D 0°C to +70°C Dice*

DG444DJ -40°C to +85°C 16 Plastic DIP

DG444DY -40°C to +85°C 16 Narrow SO

DG444/DG445

Improved, Quad, SPST Analog Switches

2 _______________________________________________________________________________________

PARAMETER SYMBOL UNITS

R

FLAT(ON)

15

Ω

9

∆R

DS(ON)

4

100

Ω

-0.50 +0.01 +0.50

Source Leakage Current
(Note 5)

I

S(OFF)

-5 +5

nA

-0.50 +0.01 +0.50

Drain Off-Leakage Current
(Note 5)

I

D(OFF)

-5 +5

nA

Analog Signal Range -15 +15 V

Drain-Source
On-Resistance

R

DS(ON)

50 85

-0.50 +0.08 +0.50

Drain On-Leakage Current
(Note 5)

-10 +10

nA

I

INH

-0.5 -0.00001 +0.5 µA

I

INL

-0.5 -0.00001 +0.5 µA

CONDITIONS

(Note 3)V

ANALOG

TA= +25°C

V+ = 13.5V, V- = -13.5V,
VD= ±8.5V, IS= -10mA

TA= T

MIN

to T

MAX

On-Resistance Match
Between Channels (Note 4)

TA= +25°C

5

Ω

TA= T

MIN

to T

MAX

VD= ±10V,
IS= -10mA

TA= +25°C

TA= T

MIN

to T

MAX

On-Resistance Flatness (Note 4)

VD= ±5V,
IS= -10mA

TA= +25°C

TA= T

MIN

to T

MAX

V+ = 16.5V, V- = -16.5V,
V

D

= ±15.5V,

V

S

= 15.5V

I

D(ON)

or

I

S(ON)

Input Current with
Input Voltage High

Input Current with
Input Voltage Low

TA= +25°C

TA= T

MIN

to T

MAX

TA= +25°C

TA= T

MIN

to T

MAX

VIN= 2.4V, all others = 0.8V

VIN= 0.8V, all others = 2.4V

V+ = 16.5V, V- = -16.5V,
VD= ±15.5V,
VS= 15.5V

V+ = 16.5V, V- = -16.5V,
VD= ±15.5V,
VS= ±15.5V

MIN TYP MAX

(Note 2)

±

±

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—Dual Supplies

(V+ = 15V, V- = -15V, VL= 5V, GND = 0, V

INH

= 2.4V, V

INL

= 0.8V, TA= 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.

(Voltage Referenced to V-)

V+........................................................................................44V

GND ....................................................................................25V

V

L

..................................................(GND - 0.3V) to (V+ + 0.3V)

Digital Inputs V

S

, VD (Note 1).......(V- - 2V) to (V+ + 2V) or 30mA

(whichever occurs first)

Continuous Current (any terminal) ......................................30mA

Peak Current, S or D (pulsed at 1ms, 10% duty cycle max) .100mA

Continuous Power Dissipation (T

A

= +70°C)

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

16-Pin PDIP (derate 10.53mW/°C above +70°C)..........842mW

16-Pin Thin QFN (derate 33.3mW/°C above +70°C) ..2667mW

Operating Temperature Ranges

DG444C/DG445C ................................................0°C to +70°C

DG444D, E/DG445D, E ....................................-40°C to +85°C

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

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

Note 1: Signals on S, D, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current rating.

INPUT

SWITCH

DG444/DG445

Improved, Quad, SPST Analog Switches

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(V+ = 15V, V- = -15V, VL= 5V, GND = 0, V

INH

= 2.4V, V

INL

= 0.8V, TA= T

MIN

to T

MAX

, unless otherwise noted.)

MIN TYP MAX

(Note 2)

DG444, VS= ±10V, Figure 2

VS= ±10V, Figure 2

Turn-Off Time

Turn-On Time

All channels on or off, V+ =

16.5V, V- = -16.5V, V

IN

= 0V

or 5V

TA= T

MIN

to T

MAX

TA= +25°C

All channels on or off, V+ =

16.5V, V- = -16.5V, V

IN

= 0V

or 5V

Logic Supply Current

TA= T

MIN

to T

MAX

TA= +25°C

All channels on or off, V+ =

16.5V, V- = -16.5V, V

IN

= 0V

or 5V

TA= T

MIN

to T

MAX

µA

-5 +5

TA= +25°C

Negative Supply Current

TA= T

MIN

to T

MAX

All channels on or off, V+ =

16.5V, V- = -16.5V, V

IN

= 0V

or 5V

TA= +25°C

V+, V-

CONDITIONS

ns90 120

t

OFF

ns150 250t

ON

-1 -0.001 +1

I+Positive Supply Current

V±4.5 ±20.0Power-Supply Range

µA

-5 +5

I

GND

Ground Current

-1 -0.0001 +1

µA

-5 +5

-1 -0.0001 +1

I-

-1 -0.001 +1
µA

-5 +5

I

L

UNITSSYMBOLPARAMETER

TA= +25°C

TA= +25°C

CL= 1nF, V

GEN

= 0,

R

GEN

= 0Ω, Figure 3

TA= +25°CCharge Injection (Note 3) pC510Q

RL= 50Ω, CL= 5pF,
f = 1MHz, Figure 4

TA= +25°C

Off-Isolation Rejection
Ratio (Note 6)

dB60OIRR

RL-50Ω, CL= 5pF,
f = 1MHz, Figure 5

TA= +25°CCrosstalk (Note 7) dB100

f = 1MHz, Figure 6 TA= +25°CSource Off-Capacitance pF4C

S(OFF)

f = 1MHz, Figure 6 TA= +25°CDrain Off-Capacitance pF4C

D(OFF)

f = 1MHz, Figure 7 TA= +25°CSource On-Capacitance pF16C

S(ON)

f = 1MHz, Figure 7 TA= +25°CDrain On-Capacitance pF16C

D(ON)

DG445, VS= ±10V, Figure 2 TA= +25°C 110 170 ns

SWITCH

INPUT