MAXIM DG308A, DG309 Technical data

19-3926; Rev 0; 3/91

Quad, SPST Analog Switches

_______________General Description

The DG308A/DG309 are quad, single-pole-single-throw
(SPST) analog switches. The DG308A is normally open
(SPST, NO), while the DG309 is normally closed (SPST,
NC). Both parts feature fast switching speeds and low on­resistance over the analog range. Other features include a
turn-on time under 120ns, a turn-off time under 90ns, and a
channel on-resistance of 60Ω. CMOS inputs provide
reduced input loading and very low leakage currents.

Both parts feature a 44V maximum breakdown voltage rat­ing that allows 30V peak-to-peak switch-off blocking
capacity. The DG308A/DG309 can be used with split sup­plies (±5V to ±20V) or a single positive supply (+5V to
+30V), while retaining CMOS-logic-compatible inputs.

________________________Applications

Sample-and-Hold Circuits
Test Equipment
Communications Systems
PBX, PABX
Guidance and Control Systems
Heads-Up Displays
Military Radios

____________________________Features

♦ 60Ω r

DS(ON)

♦ Single/Bipolar-Supply Operation
♦ CMOS Logic Compatible
♦ Monolithic, Low-Power CMOS Design

______________Ordering Information

PART

DG308ACJ

DG308ACY
DG308ACK 0°C to +70°C
DG308AC/D 0°C to +70°C Dice*
DG308ADJ
DG308ADY
DG308ADK -40°C to +85°C
DG308AAK -55°C to +125°C 16 CERDIP**
DG309CJ
DG309CY
DG309CK 0°C to +70°C
DG309C/D 0°C to +70°C Dice*
DG309DJ
DG309DY
DG309DK -40°C to +85°C
DG309AK -55°C to +125°C 16 CERDIP**

* Contact factory for dice specifications.

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

TEMP. RANGE PIN-PACKAGE

0°C to +70°C
0°C to +70°C

-40°C to +85°C 16 Plastic DIP

-40°C to +85°C

0°C to +70°C 16 Plastic DIP
0°C to +70°C

-40°C to +85°C 16 Plastic DIP

-40°C to +85°C

16 Plastic DIP
16 Narrow SO
16 CERDIP

16 Narrow SO
16 CERDIP

16 Narrow SO
16 CERDIP

16 Narrow SO
16 CERDIP

DG308A/DG309

__________Typical Operating Circuit

VIN ±10V

* PINS 1, 8, 9, AND 16 ARE LOGIC-CONTROL INPUTS.

2

DG308A

3

-15V +15V

10k 20k

DG309

4
5
6
7
8

**

PROGRAMMABLE-GAIN AMPLIFIER

________________________________________________________________

1

**

5k

16
15
14
13
12
11
10

9

40k

5k

V

OUT

______Pin Configuration/Truth Table

TOP VIEW

IN1

1
2

D1
S1

3
4

V-

5

GND

6

S4
D4

7

IN4

8

TRUTH TABLE

LOGIC DG308A

0
1

DG308A

DG309

DIP/SO

OFF

ON

Maxim Integrated Products

IN2

16

D2

15

S2

14
13

V+ (SUBSTRATE)
N.C.

12
11

S3

10

D3

9

IN3

DG309

ON

OFF

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]

Quad, SPST Analog Switches

ABSOLUTE MAXIMUM RATINGS

Voltage Referenced to V-

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

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

Digital Inputs V

Current into 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) ............................70mA

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.

, VD................(V- - 2V) to (V+ + 2V) or 20mA,

S

whichever occurs first

Continuous Power Dissipation (TA= +70°C) (Note 1)

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

DG308AC_/DG309C_.........................................0°C to +70°C

DG308AD_/DG309D_......................................-40°C to +85°C

DG308AAK/DG309AK...................................-55°C to +125°C

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

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

DG308A/DG309

ELECTRICAL CHARACTERISTICS

(V+ = 15V, V- = -15V, TA= T

SWITCH

Analog Signal Range

Drain-Source
On-Resistance

Source-Off
Leakage Current

Drain-Off
Leakage Current

Drain-On
Leakage Current

INPUT

Input Current with
Input Voltage High

Input Current with
Input Voltage Low

SYMBOLPARAMETER

ANALOG

r

DS(ON)

I

S(OFF)

I

D(OFF)

I

D(ON)

INH

INL

to T

MIN

, unless otherwise noted.) (Note 2)

MAX

VIN= 11V (DG308A),
VIN= 3.5V (DG309),
IS= 1mA,
VD= 10V or -10V

VIN= 3.5V (DG308A),
VIN= 11V (DG309),
VS= 14V, VD= -14V

VIN= 3.5V (DG308A),
VIN= 11V (DG309),
VS= -14V, VD= 14V

VIN= 3.5V (DG308A),
VIN= 11V (DG309),
VS= 14V, VD= -14V

VIN= 3.5V (DG308A),
VIN= 11V (DG309),
VS= -14V, VD= 14V

VIN=11V (DG308A),
VIN= 3.5V (DG309),
VS= VD= +14V

VIN= 11V (DG308A),
VIN= 3.5V (DG309),
VS= VD= -14V

VIN= 15V

VIN= 0V

CONDITIONS

TA= +25°C

= +25°C,

T

A

T

MIN

TA= T

MAX

TA= +25°C
TA= T

MAX

TA= +25°C
TA= T

MAX

TA= +25°C
TA= T

MAX

TA= +25°C
TA= T

MAX

TA= +25°C
TA= T

MAX

TA= +25°C
TA= T

MAX

TA= +25°C,
T

MAX

TA= +25°C,
T

MAX

DG30_AK

MIN TYP MAX

60 100

95 150

-1 0.1 1

-100 100

-1 -0.1 1

-100 100

-1 0.1 1

-100 100

-1 0.1 1

-100 100

-2 0.1 2

-200 200

-2 0.1 2

-200 200

DG30_C/D

MIN TYP MAX

-15 15
60 100

80 125

-5 0.1 5

-100 100

-5 0.1 5

-100 100

-5 0.1 5

-100 100

-5 0.1 5

-100 100

-5 0.1 5

-200 200

-5 0.1 5

-200 200

-1 0.001 1

-1 0.001 1

UNITS

V-15 15V

Ω

nA

nA

nA

µA-1 0.001 1I

µA-1 -0.001 1I

2 _______________________________________________________________________________________

Quad, SPST Analog Switches

ELECTRICAL CHARACTERISTICS (continued)

(V+ = 15V, V- = -15V, TA= T

PARAMETER SYMBOL

SUPPLY

Positive Supply
Current

Negative Supply
Current

DYNAMIC

Turn-On Time t

Off Isolation
(Note 3)

Source-Off
Capacitance

Drain-Off
Capacitance

Channel-On

C

Capacitance

Note 1: All leads are soldered or welded to the PC board.
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: Off isolation = 20log10 V

to T

MIN

I+

I-

ON

OFF

OIRR 78 dB

C

S(OFF)

C

D(OFF)

D(ON) +

C

S(ON)

, unless otherwise noted.) (Note 2)

MAX

All channels on or off,
VIN= 0V or 15V

TA= T

MAX

All channels on or off,
VIN= 0V or 15V

TA= T

MAX

Figure 1
Figure 1

GEN

= 0V, R

GEN

= 0Ω

VIN= 0V (DG308A), VIN= 15V (DG309),
ZL= 75Ω, VS= 2V

, f = 500kHz

p-p

VIN= 0V (DG308A), VIN= 15V (DG309),
f = 140kHz, VS= 0V

VIN= 0V (DG308A), VIN= 15V (DG309),
f = 140kHz, VS= 0V

VIN= 0V (DG308A), VIN= 15V (DG309),
VD= VS= 0V

, VD= output, VS= input to off switch.

D/VS

DG30_AK

MIN TYP MAX

-10 0.001 10TA= +25°C

DG30_C/D

MIN TYP MAX

-100 0.001 100

100

-100 -0.001 100-10 -0.001 10TA= +25°C

-100

130 200 ns

90 150 ns

-100

130 200

90 150Turn-Off Time t

-10Charge Injection Q -10 pCCL= 0.01µF, V
78

11 pF

8 pF

27 pF

11

8

27

100

UNITSCONDITIONS

DG308A/DG309

µA

µA

LOGIC

INPUT IN1

< 20ns

t

r

t

< 20ns

f

SWITCH

INPUT

SWITCH

OUTPUT VO

50%

OV
V

S

0.9V

0V

t

ON

Figure 1. Switching-Time Test Circuit

_______________________________________________________________________________________ 3

+15V 

V+

SWITCH

INPUT

VS = +3V

t

OFF

O

0.9V

O

LOGIC
INPUT

IN1

GND 0VV- 

-15V
R

= V

V

O

S

RL + r

D1S1

R



L

1k

(REPEAT TEST FOR S2, S3, AND S4)

L
DS(ON)

C
35pF



L

SWITCH
OUTPUT
V

O

Quad, SPST Analog Switches

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

DRAIN-SOURCE ON-RESISTANCE

vs. DRAIN VOLTAGE & POWER SUPPLIES

500

V+ = 5V

400

TA = +25°C
V- = GND

DG308A309 TOC01

DRAIN-SOURCE ON-RESISTANCE

vs. DRAIN VOLTAGE & POWER SUPPLIES

250

200

V+ = ±5V

TA = +25°C

DG308A309 TOC04

300

(Ω)

DS(ON)

r

200

DG308A/DG309

100

0

0

V+ = 10V

V+ = 15V

510

VD (V)

15

V+ = 20V

20

POWER-SUPPLY CURRENT 

AND VOLTAGE vs. TEMPERATURE

800

TA = +25°C

700

V- = GND

600
500

(nA)

400

SUPPLY

I

300
200

100

0

-50 12525-25 0 7550 100
TEMPERATURE (°C)

V+ = 44V

V+ = 30V

V+ = 10V

V+ = 5V

DG308A309 TOC02

_____________________Pin Description

PIN

FUNCTIONNAME

Logic Control InputsIN1–IN41, 8, 9, 16
Drain OutputD1–D42, 7, 10, 15
Source InputS1–S43, 6, 11, 14
Negative Supply Voltage InputV-4
GroundGND5

N.C.12

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.

4

___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 [phone]

No Connect. Not internally
connected.

Positive Supply Voltage Input.

V+13

Connected to substrate.

The DG308A/DG309 switch positive analog signals while
using a single positive supply, allowing use in applica­tions where only one supply is available. The disadvan­tages of using a single supply are slower switching
speed and increased r

Current and Voltage vs. Temperature

typical curve for a single-supply design. As stated in the
Absolute Maximum Ratings, the analog voltage should
not go above or below the supply voltages, which are V+
and 0V in single-supply operation.

150

(Ω)

V+ = ±12V

VD (V)

V+ = ±10V

V+ = ±15V

0

51015

DS(ON)

r

100

50

0

-15

-10 -5

LEAKAGE CURRENTS vs.

ANALOG VOLTAGE

(pA)

D

, I

S

I

20

10

I

0

-10

-20

-30

S(OFF)

I

D(OFF)

-6 0

-12
V

ANALOG

I

D(ON)

(V)

TA = +25°C

= ±15V

V

CC

6

DG308A309 TOC03

12

__________Applications Information

. The

DS(ON)

Power-Supply

graph shows the

© 1991 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.