Maxim Integrated Producs DG421CY, DG421CD, DG421AK, DG425DY, DG425DN Datasheet

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0 (0)

19-0137; Rev 1; 3/94

Improved Low-Power, CMOS Analog Switches with Latches

_______________General Description

Maxim’s redesigned DG421/DG423/DG425 monolithic analog switches now feature guaranteed on-resistance matching (3Ω max) between switches and on-resistance flatness over the signal range (4Ω max). These low onresistance switches (20Ω typ) conduct equally well in both directions. They guarantee a low charge injection of 15pC maximum and an ESD tolerance of 2000V minimum per Method 3015.7. Off leakage current over temperature has also been reduced (less than 5nA at +85°C).

The DG421/DG423/DG425 are precision, dual CMOS switches with latchable logic inputs that simplify interfacing with microprocessors (µPs). The single-pole/single- throw DG421 and double-pole/single-throw DG425 are normally open dual switches. The dual, single- pole/double-throw DG423 has two normally open and two normally closed switches. Fast switching times (175ns for tON and 145ns for tOFF) and low power consumption (35µW max) make these parts ideal for battery-powered applications requiring µP-compatible switches. Operation is from a single +10V to +30V supply, or bipolar ±4.5V to ±20V supplies. Fabricated with the same 44V silicon-gate process, these switches have rail-to-rail signal handling capabilities.

_______________________Applications

Sample-and-Hold Circuits

Modems

Fax Machines

Test Equipment

Battery-Operated Systems

PBX, PABX

Guidance and Control Systems

Military Radios

Audio Signal Routing

Communication Systems

______________________New Features

Plug-In Upgrades for Industry-Standard DG421/DG423/DG425

Improved r(DS)ON Match Between Channels (3Ω max)

Guaranteed rFLAT(ON) Over Signal Range (4Ω max)

Improved Charge Injection (15pC max)

Improved Off Leakage Current Over Temperature (<5nA at +85°C)

Withstands Electrostatic Discharge (2000V min) per Method 3015.7

__________________Existing Features

Low rDS(ON) (35Ω max)

Single-Supply Operation +10V to +30V Bipolar-Supply Operation ±4.5V to ±20V

Low Power Consumption (35µW max)

Rail-to-Rail Signal Handling Capability

TTL/CMOS-Logic Compatible

______________Ordering Information

PART

TEMP. RANGE

PIN-PACKAGE

 

 

 

 

DG421CJ

0°C to +70°C

16

Plastic DIP

 

 

 

 

DG421CY

0°C to +70°C

16

SO

 

 

 

DG421C/D

0°C to +70°C

Dice*

 

 

 

 

DG421DJ

-40°C to +85°C

16

Plastic DIP

 

 

 

 

DG421DY

-40°C to +85°C

16

SO

 

 

 

 

DG421DK

-40°C to +85°C

16

CERDIP

 

 

 

 

DG421AK

-55°C to +125°C

16

CERDIP**

 

 

 

 

Ordering Information continued at end of data sheet.

* Contact factory for dice specifications.

**Contact factory for availability and processing to MIL-STD-883B.

__Functional Diagrams/Truth Tables

_________________Pin Configurations

S1

 

D1

 

 

 

 

WR

 

 

 

 

 

 

IN1

 

CK

DG421 TRUTH TABLE

D

 

 

 

 

 

Q

WR RS

IN

SWITCH

 

 

R

 

 

 

 

0

Off

IN2

CK

DG421

0

1

D

Q

 

 

 

1

On

RS

R

 

 

LOGIC "O" £ 0.8V

 

 

 

S2

 

D2

 

LOGIC "1" ³

2.4V

 

 

 

SWITCHES SHOWN FOR

TWO SPST SWITCHES

 

LOGIC "1" INPUT

 

 

 

 

 

PER PACKAGE

 

 

 

 

Functional Diagrams/Truth Tables continued at end of data sheet.

TOP VIEW

 

D1

1

 

16

S1

 

 

 

 

 

 

 

 

 

 

WR

 

 

2

 

15

IN1

N.C.

 

 

 

V-

3

 

14

N.C.

 

DG421

 

GND

4

13

 

 

 

 

 

 

 

 

 

N.C.

5

 

12

VL

 

 

 

 

 

 

 

 

 

N.C.

6

 

11

V+

 

 

 

 

 

 

 

 

 

 

 

RS

 

7

 

10

IN2

 

D2

 

 

 

S2

8

 

9

DIP

N.C. = No Internal Connection

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

DG421/DG423/DG425

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

DG421/DG423/DG425

Improved Low-Power,

CMOS Analog Switches with Latches

ABSOLUTE MAXIMUM RATINGS

Voltage Referenced to V-

 

 

V+ ............................................................

 

44V

GND .........................................................

 

25V

VL ..................................

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

Digital Inputs, VS, VD (Note 1)..............

(V- - 2V) to (V+ + 2V)

Current (any terminal, except S or D) .................................

30mA

Continuous Current, S or D .................................................

 

20mA

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

100mA

Continuous Power Dissipation (TA = +70°C)

 

842mW

16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)

20-Pin PLCC (derate 10.00mW/°C above +70°C) .....

800mW

16-Pin CERDIP (derate 10.00mW/°C above +70°C) ...

800mW

Operating Temperature Ranges

 

 

DG42_C_ ..........................................

0°C to +70°C

DG42_D_ .......................................

-40°C to +85°C

DG42_A_ . .....................................

-55°C to +125°C

Storage Temperature Ranges

 

 

DG42_C_/DG42_D_ ...........................

-65°C to +125°C

DG42_A_ .....................................

-65°C to +150°C

Lead Temperature (soldering, 10sec)....................

 

+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 ratings.

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.

ELECTRICAL CHARACTERISTICS

(V+ = 15V, V- = -15V, VL = +5V, GND = 0V, VINH = +2.4V, VINL = +0.8V, TA = TMIN to TMAX, unless otherwise noted.)

 

 

 

 

DG42_C, DG42_D

DG42_A

 

 

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

 

 

 

 

 

(Note 2)

 

 

(Note 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Analog Signal Range

VANALOG

(Note 3)

 

-15

 

15

-15

 

15

V

 

 

V+ = 13.5V,

TA = +25°C

 

20

45

 

20

35

 

Drain-Source

 

V- = -13.5V,

 

 

 

rDS(ON)

 

 

 

 

 

 

 

Ω

On-Resistance

IS = -10mA,

TA = TMIN to TMAX

 

 

45

 

 

45

 

 

VD = ±10V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

On-Resistance Match

 

V+ = 16.5V,

TA = +25°C

 

 

3

 

 

3

 

 

V- = -16.5V,

 

 

 

 

 

Between Channels

rDS(ON)

 

 

 

 

 

 

 

Ω

IS = -10mA,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Note 4)

 

TA = TMIN to TMAX

 

 

4

 

 

4

 

 

VD = ±10V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V+ = 15V,

TA = +25°C

 

 

4

 

 

4

 

On-Resistance

 

V- = -15V,

 

 

 

 

 

rFLAT(ON)

 

 

 

 

 

 

 

Ω

Flatness (Note 4)

IS = -10mA,

 

 

 

 

 

 

 

TA = TMIN to TMAX

 

 

5

 

 

5

 

 

VD = ±5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Source-Off

 

V+ = 16.5V,

TA = +25°C

-0.50

-0.01

0.50

-0.25

-0.01

0.25

 

 

V- = -16.5V,

 

Leakage Current

IS(OFF)

 

 

 

 

 

 

 

nA

VD = ±15.5V,

 

 

 

 

 

 

 

(Note 5)

 

TA = TMIN to TMAX

-5

 

5

-10

 

10

 

 

VS = m 15.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drain-Off

 

V+ = 16.5V,

TA = +25°C

-0.50

-0.01

0.50

-0.25

-0.01

0.25

 

 

V- = -16.5V,

 

Leakage Current

ID(OFF)

 

 

 

 

 

 

 

nA

VD = ±15.5V,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Note 5)

 

TA = TMIN to TMAX

-5

 

5

-10

 

10

 

 

VS = m 15.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drain-On

 

V+ = 16.5V,

TA = +25°C

-1.0

-0.04

1.0

-0.40

-0.04

0.40

 

 

V- = -16.5V,

 

Leakage Current

ID(ON)

 

 

 

 

 

 

 

nA

VD = ±15.5V,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Note 5)

 

TA = TMIN to TMAX

-10

 

10

-20

 

20

 

 

VS = ±15.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

2 _______________________________________________________________________________________

Improved Low-Power, CMOS Analog Switches with Latches

ELECTRICAL CHARACTERISTICS (continued)

(V+ = 15V, V- = -15V, VL = +5V, GND = 0V, VINH = +2.4V, VINL = +0.8V, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

 

MIN

TYP

MAX

UNITS

 

 

(Note 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Current with Input Voltage High

IINH

IN = 2.4V, all others = 0.8V

 

 

-0.50

0.005

0.50

µA

 

 

 

 

 

 

 

 

 

Input Current with Input Voltage Low

IINL

IN = 0.8V, all others = 2.4V

 

 

-0.50

0.005

0.50

µA

SUPPLY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Supply Range

V+, V-

(Note 3)

 

 

±4.5

 

±20

V

 

 

 

 

 

 

 

 

 

 

 

 

All channels on or off,

 

TA = +25°C

-1.0

0.01

1.0

 

Positive Supply Current

I+

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

 

µA

 

TA = TMIN to TMAX

 

-5.0

 

5.0

 

 

VIN = 0V or 5V

 

 

 

 

 

 

All channels on or off,

 

TA = +25°C

 

-1.0

-0.01

1.0

 

Negative Supply Current

I-

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

 

 

µA

 

TA = TMIN to TMAX

 

-5.0

 

5.0

 

 

VIN = 0V or 5V

 

 

 

 

 

 

All channels on or off,

 

TA = +25°C

-1.0

-0.01

1.0

 

Logic Supply Current

IL

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

 

µA

 

TA = TMIN to TMAX

-5.0

 

5.0

 

 

VIN = 0V or 5V

 

 

 

 

 

All channels on or off,

 

TA = +25°C

-1.0

-0.01

1.0

 

Ground Current

IGND

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

 

µA

 

TA = TMIN to TMAX

-5.0

 

5.0

 

 

VIN = 0V or 5V

 

 

 

DYNAMIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn-On Time

tON

Figure 2

 

TA = +25°C

 

 

150

250

ns

 

TA = TMIN to TMAX

 

 

 

300

 

 

 

 

 

 

 

 

Turn-Off Time

tOFF

Figure 2

 

 

 

 

200

ns

 

tWW

 

 

TA = +25°C

 

200

 

 

 

 

VS = ±10V,

 

TA = -55°C to +125°C

 

200

 

 

 

 

 

 

 

 

 

 

Latch Timing

tDW

RL = 300Ω ,

 

TA = +25°C

 

100

 

 

ns

CL = 35pF,

 

TA = -55°C to +125°C

 

100

 

 

 

 

 

 

 

 

 

 

tWD

Figure 3

 

TA = +25°C

 

60

 

 

 

 

 

 

TA = -55°C to +125°C

 

100

 

 

 

 

 

 

 

 

 

 

 

Break-Before-Make Interval (Note 3)

tD

DG423, Figure 4

 

TA = +25°C

 

5

25

 

ns

Charge Injection (Note 3)

Q

CL = 10nF, VG = 0V,

 

TA = +25°C

 

 

10

15

pC

RG = 0Ω , Figure 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Off-Isolation Rejection Ratio

OIRR

RL = 100Ω , CL = 5pF,

 

TA = +25°C

 

 

72

 

dB

(Note 6)

f = 1MHz, Figure 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Crosstalk (Note 7)

 

RL = 50Ω , CL = 5pF,

 

TA = +25°C

 

 

90

 

dB

 

f = 1MHz, Figure 7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drain-Off Capacitance

CD(OFF)

f = 1MHz, Figure 8

 

TA = +25°C

 

 

12

 

pF

Source-Off Capacitance

CS(OFF)

f = 1MHz, Figure 8

 

TA = +25°C

 

 

12

 

pF

Drain-On Capacitance

CD(ON)

f = 1MHz, Figure 9

 

TA = +25°C

 

 

39

 

pF

Source-On Capacitance

CS(ON)

f = 1MHz, Figure 9

 

TA = +25°C

 

 

39

 

pF

Note 2: Typical values are for design aid only, are not guaranteed, and are not subject to production testing. 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: On-resistance match between channels and flatness are guaranteed only with bipolar-supply operation. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured at the extremes of the specified analog signal range.

Note 5: Leakage parameters IS(OFF), ID(OFF), and ID(ON) are 100% tested at the maximum rated hot temperature and guaranteed by correlation at +25°C.

Note 6: Off-Isolation Rejection Ratio = 20log (VD/VS), VD = output, VS = input to off switch.

Note 7: Between any two switches.

_______________________________________________________________________________________ 3

DG421/DG423/DG425

Maxim Integrated Producs DG421CY, DG421CD, DG421AK, DG425DY, DG425DN Datasheet

DG421/DG423/DG425

Improved Low-Power,

CMOS Analog Switches with Latches

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

ON-RESISTANCE vs. VD

ON-RESISTANCE vs. VD AND

ON-RESISTANCE vs. VD

(DUAL-SUPPLIES)

TEMPERATURE (DUAL SUPPLIES)

(SINGLE SUPPLY)

 

55

B: V+ = 10V, V- = -10V

 

MAX401-1

35

MAX401-2

140

MAX401-3

 

50

 

 

V- = 0V

 

 

A: V+ = 5V, V- = -5V

 

 

 

 

 

 

 

45

C: V+ = 15V, V- = -15V

A

 

30

TA = +125°C

120

 

 

 

 

 

 

 

40

D: V+ = 20V, V- = -20V

 

 

 

TA = +85°C

 

 

 

 

 

 

25

TA = +25°C

100

 

(Ω)

35

 

 

(Ω)

 

(Ω)

V+ = 5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ON)

30

 

B

(ON)

20

(ON)

80

 

DS

25

 

DS

 

DS

 

 

 

 

 

 

 

r

 

 

r

 

r

 

 

 

20

 

 

C

15

TA = -55°C

60

 

 

 

 

D

 

 

 

 

15

 

 

 

 

V+ = 10V

 

 

 

 

 

10

 

40

 

 

 

 

 

 

 

 

 

10

 

 

 

 

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

V+ = 15V

V+ = 20V

 

 

 

 

 

 

5

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-20

-10

0

10

20

-20

-10

0

10

20

0

5

10

15

20

 

 

 

VD (V)

 

 

 

 

 

 

 

VD (V)

 

 

 

 

 

 

VD (V)

 

 

 

rDS (ON) (Ω)

 

 

ON-RESISTANCE vs. VD AND

 

 

 

 

TEMPERATURE (SINGLE SUPPLY)

 

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-4

60

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX401

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TA =

+125°C

 

 

 

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TA =

+85°C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TA =

+25°C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V+ = 12V, V- = 0V

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

5

10

 

15

 

 

 

20

VD (V)

 

100

 

10

(nA)

1

LEAKAGEOFF

0.01

 

0.1

 

0.001

0.0001

OFF LEAKAGE CURRENTS vs.

TEMPERATURE

 

 

 

 

 

 

5-

 

V+ = 16.5V

 

 

 

MAX401

 

 

 

 

 

 

V- = -16.5V

 

 

 

 

 

VD = ±15V

 

 

 

 

 

VS = ±15V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-75

25

125

TEMPERATURE (°C)

 

100

 

10

(nA)

1

LEAKAGEON

0.01

 

0.1

 

0.001

0.0001

ON LEAKAGE CURRENTS vs.

TEMPERATURE

 

 

 

 

 

 

6-

 

V+ = 16.5V

 

 

 

MAX401

 

 

 

 

 

 

V- = -16.5V

 

 

 

 

 

VD = ±15V

 

 

 

 

 

VS = ±15V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-75

25

125

TEMPERATURE (°C)

 

 

 

CHARGE INJECTION vs.

 

 

 

 

 

 

SUPPLY CURRENT vs.

 

 

 

 

 

 

ANALOG VOLTAGE

 

 

 

 

 

 

 

TEMPERATURE

 

 

 

60

 

 

 

 

 

 

 

 

 

MAX401-7

 

 

100

 

 

 

 

 

 

 

 

MAX401-8

 

40

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

A)

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I+ at V+ = 16.5V

 

 

(pC)

 

 

 

 

 

 

 

 

 

 

 

(μ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

L

0.1

 

 

 

 

 

 

 

 

 

Q

 

 

 

 

 

 

 

 

 

 

I-,

 

 

 

 

I- at

V- = -16.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-20

 

 

 

 

 

 

 

 

 

 

I+,

 

0.01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IL

at VL = 5V

 

 

 

 

-40

 

 

 

 

 

 

 

 

 

 

 

0.001

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-60

 

 

 

 

 

 

 

 

 

 

0.0001

 

 

 

 

 

 

 

 

 

 

-20

-10

0

 

10

20

 

 

-75

25

 

125

 

 

 

 

 

VD (V)

 

 

 

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

4 _______________________________________________________________________________________

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