General Description
Maxim's redesigned DG444/DG445 analog switches
now feature on-resistance matching (4
max) between
switches and guaranteed on-resistance flatness over
the signal range (9
max). These low on-resistance
switches conduct equally well in either direction. They
guarantee low charge injection (10pC max), low power
consumption (35W max), and an electrostatic dis-
charge (ESD) tolerance of 2000V (min) per Method
3015.7. The new design offers lower off-leakage current
over temperature (less than 5nA at +85C).
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 sup-
plies. Maxim's improved DG444/DG445 continue to be
fabricated with a 44V silicon-gate process.
________________________Applications
Sample-and-Hold Circuits
Communication Systems
Test Equipment
Battery-Operated Systems
Heads-Up Displays
PBX, PABX
Guidance and Control Systems
Audio Signal Routing
Military Radios
Modems/Faxes
New Features
o Plug-In Upgrades for Industry-Standard DG444/DG445
o Improved r
ON
Match Between Channels (4
max)
o Guaranteed r
FLAT(ON)
Over Signal Range (9
max)
o Improved Charge Injection (10pC max)
o Improved Off-Leakage Current Over Temperature
(< 5nA at +85C)
o Withstand ESD (2000V min)
per Method 3015.7
Existing Features
o Low r
DS(ON)
(85
max)
o Single-Supply Operation +10V to +30V
Bipolar-Supply Operation 4.5V to 20V
o Low Power Consumption (35W max)
o Rail-to-Rail
Signal Handling
o TTL/CMOS-Logic Compatible
______________Ordering Information
DG444/DG445
Improved, Quad, SPST Analog Switches
________________________________________________________________ Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
IN2
D2
S2
V+
V-
S1
D1
IN1
DG445
V
L
S3
D3
IN3
IN4
D4
S4
GND
DIP/SO
DIP/SO
DG445
LOGIC
SWITCH
0
1
OFF
ON
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
19-4705; Rev 3; 9/01
Pin Configurations/Functional Diagrams/Truth Tables
PART
TEMP. RANGE
PIN-PACKAGE
DG444CY
0C to +70C
16 Narrow SO
Dice*
0C to +70C
DG444C/D
DG444DJ
-40C to +85C
16 Plastic DIP
16 Narrow SO
-40C to +85C
DG444DY
DG444CJ
0C to +70C
16 Plastic DIP
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
Rail-to Rail is a registered trademark of Nippon Motorola, Ltd.
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.
DG444/DG445
Improved, Quad, SPST Analog Switches
2
_______________________________________________________________________________________
PARAMETER
SYMBOL
UNITS
r
FLAT(ON)
15
9
r
DS(ON)
4
100
-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
A
I
INL
-0.5
-0.00001
0.5
A
CONDITIONS
(Note 3)
V
ANALOG
T
A
= +25C
V+ = 13.5V, V- = -13.5V,
V
D
= 8.5V, I
S
= -10mA
T
A
= T
MIN
to T
MAX
On-Resistance Match
Between Channels (Note 4)
T
A
= +25C
5
T
A
= T
MIN
to T
MAX
V
D
= 10V,
I
S
= -10mA
T
A
= +25C
T
A
= T
MIN
to T
MAX
On-Resistance Flatness (Note 4)
V
D
= 5V,
I
S
= -10mA
T
A
= +25C
T
A
= 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
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
V
IN
= 2.4V, all others = 0.8V
V
IN
= 0.8V, all others = 2.4V
V+ = 16.5V, V- = -16.5V,
V
D
= 15.5V,
V
S
= 15.5V
V+ = 16.5V, V- = -16.5V,
V
D
= 15.5V,
V
S
= 15.5V
MIN
TYP
MAX
(Note 2)
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--Dual Supplies
(V+ = 15V, V- = -15V, V
L
= 5V, GND = 0, 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.
Voltage Referenced to V-
V+........................................................................................44V
GND ....................................................................................25V
V
L
....................................................(GND -0.3V) to (V+ +0.3V)
Digital Inputs V
S
, V
D
(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
= +70C)
16-Pin PDIP (derate 10.53mW/C above +70C)..........842mW
6-Pin Narrow SO (derate 8.70mW/C above +70C) ....696mW
16-Pin QFN (derate 19.2mW/C above +70C) ..........1538mW
Operating Temperature Ranges
DG444C/DG445C ................................................0C to +70C
DG444D, E/DG445D, E ....................................-40C to +85C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
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, V
L
= 5V, GND = 0, V
INH
= 2.4V, V
INL
= 0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
MIN
TYP
MAX
(Note 2)
DG444, V
S
= 10V, Figure 2
V
S
= 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
T
A
= T
MIN
to T
MAX
T
A
= +25C
All channels on or off, V+ =
16.5V, V- = -16.5V, V
IN
= 0V
or 5V
Logic Supply Current
T
A
= T
MIN
to T
MAX
T
A
= +25C
All channels on or off, V+ =
16.5V, V- = -16.5V, V
IN
= 0V
or 5V
T
A
= T
MIN
to T
MAX
A
-5
5
T
A
= +25C
Negative Supply Current
T
A
= T
MIN
to T
MAX
All channels on or off, V+ =
16.5V, V- = -16.5V, V
IN
= 0V
or 5V
T
A
= +25C
V+, V-
CONDITIONS
ns
90
120
t
OFF
ns
150
250
t
ON
-1
-0.001
1
I+
Positive Supply Current
V
4.5
20.0
Power-Supply Range
A
-5
5
I
GND
Ground Current
-1
-0.0001
1
A
-5
5
-1
-0.0001
1
I-
-1
-0.001
1
A
-5
5
I
L
UNITS
SYMBOL
PARAMETER
T
A
= +25C
T
A
= +25C
C
L
= 1nF, V
GEN
= 0,
R
GEN
= 0
, Figure 3
T
A
= +25C
Charge Injection (Note 3)
pC
5
10
Q
R
L
= 50
, C
L
= 5pF,
f = 1MHz, Figure 4
T
A
= +25C
Off-Isolation Rejection
Ratio (Note 6)
dB
60
OIRR
R
L
-50
, C
L
= 5pF,
f = 1MHz, Figure 5
T
A
= +25C
Crosstalk (Note 7)
dB
100
f = 1MHz, Figure 6
T
A
= +25C
Source Off-Capacitance
pF
4
C
S(OFF)
f = 1MHz, Figure 6
T
A
= +25C
Drain Off-Capacitance
pF
4
C
D(OFF)
f = 1MHz, Figure 7
T
A
= +25C
Source On-Capacitance
pF
16
C
S(ON)
f = 1MHz, Figure 7
T
A
= +25C
Drain On-Capacitance
pF
16
C
D(ON)
DG445, V
S
= 10V, Figure 2 T
A
= +25C
110
170
ns
SWITCH
INPUT
DG444/DG445
Improved, Quad, SPST Analog Switches
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS--Single Supply
(V+ = 12V, V- = 0, V
L
= 5V, GND = 0, V
INH
= 2.4V, V
INL
= 0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
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 the minimum value of on-resistance as measured at the extremes of the speci-
fied analog signal range.
Note 5: Leakage parameters I
S(OFF)
, I
D(OFF)
, I
D(ON)
, and IS
(ON)
are100% tested at the maximum rated hot temperature and guaranteed at +25C.
Note 6: Off-Isolation Rejection Ratio = 20log (V
D
/V
S
), V
D
= output, V
S
= input to off switch.
Note 7: Between any two switches.
__________________________________________Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted.)
ON-LEAKAGE CURRENTS
ON-LEAKAGE
(nA)
-2
-1
0
1
2
-15
0
15
VS, VD (V)
T
A
= +125
C
T
A
= +85
C
V+ = 15V
V- = -15V
DG444/5-1
-10
-5
5
10
OFF-LEAKAGE CURRENTS
OFF-LEAKAGE (nA)
-1
0
-0.5
0.5
1
VS, VD (V)
DG444/5-2
-15
0
15
-10
-5
5
10
T
A
= +125
C
V+ = 15V
V- = -15V
T
A
= +85
C
SWITCHING THRESHOLD vs.
BIPOLAR SUPPLY VOLTAGE
V
IN
(V)
0
0.5
1.5
2.0
2.5
3.0
3.5
5
10
15
20
BIPOLAR SUPPLY VOLTAGE (V)
DG444/5-3
IN HI MIN
IN LOW MAX
C
L
= 1nF, V
GEN
= 0,
R
GEN
= 0
, Figure 3
Charge Injection (Note 3)
Q
pC
5
10
T
A
= +25C
Turn-Off Time
t
OFF
ns
V
S
= 8V, Figure 2
60
200
T
A
= +25C
Turn-On Time
t
ON
ns
V
S
= 8V, Figure 2
300
400
T
A
= +25C
V+ = 10.8V; V
L
= 5.25V;
V
D
= 3V, 8V; I
S
= -10mA
Drain-Source
On-Resistance
100
160
V
ANALOG
All channels on or off,
V
IN
= 0V or 5V
A
-5
5
I
L
Logic Supply Current
-1
0.001
1
T
A
= T
MIN
to T
MAX
T
A
= +25C
All channels on or off,
V
IN
= 0V or 5V
A
-5
5
I
GND
Ground Current
-1
-0.0001
1
T
A
= T
MIN
to T
MAX
T
A
= +25C
All channels on or off,
V
IN
= 0V or 5V
A
-5
5
I-
Negative Supply Current
-1
-0.0001
1
T
A
= T
MIN
to T
MAX
T
A
= +25C
(Note 3)
All channels on or off,
V
IN
= 0V or 5V
CONDITIONS
V
0
12
Analog Signal Range
A
-5
5
I+
Power-Supply Current
-1
0.001
1
T
A
= T
MIN
to T
MAX
T
A
= +25C
UNITS
MIN
TYP
MAX
(Note 2)
SYMBOL
PARAMETER
T
A
= +25C
Power-Supply Range
V+, V-
10.8
24.0
V
r
DS(ON)
T
A
= T
MIN
to T
MAX
200
DYNAMIC
SWITCH
SUPPLY
DG444/DG445
Improved, Quad, SPST Analog Switches
_______________________________________________________________________________________
5
Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted.)
ON-RESISTANCE vs. VD
AND UNIPOLAR-SUPPLY VOLTAGE
0
25
50
75
100
125
0
5
10
15
20
VD (V)
r
DS(ON)
(
)
DG444/5-4
V+ = 10V
V+ = 15V
V+ = 20V
150
V+ = 5V
ON-RESISTANCE vs. VD, UNIPOLAR-
SUPPLY VOLTAGE AND TEMPERATURE
0
25
50
75
100
125
150
r
DS(ON)
(
)
0
4
8
12
VD (V)
DG444/5-7
T
A
= +125
C
T
A
= +25
C
T
A
= -40
C
V+ = 12V
V- = 0V
ON-RESISTANCE vs. VD AND
BIPOLAR-SUPPLY VOLTAGE
r
DS(ON)
(
)
30
60
90
120
-20
-10
0
10
20
VD (V)
0
DG444/5-5
5V
10V
15V
20V
ON-RESISTANCE vs. VD, BIPOLAR-
SUPPLY VOLTAGE AND TEMPERATURE
r
DS(ON)
(
)
0
20
40
60
80
100
VD (V)
DG444/5-6
T
A
= +125
C
T
A
= -55
C
T
A
= +25
C
V+ = 15V, V- = -15V
-15
0
15
-10
-5
5
10
SWITCHING TIME vs.
BIPOLAR-SUPPLY VOLTAGE
TIME (ns)
0
40
80
120
160
5
10
15
20
BIPOLAR-SUPPLY VOLTAGE (V)
DG444/5-8
tON
tOFF
SWITCHING TIME vs.
UNIPOLAR-SUPPLY VOLTAGE
TIME (ns)
0
50
100
150
200
10
15
20
25
UNIPOLAR-SUPPLY VOLTAGE (V)
V- = 0V
DG444/5-9
tON
tOFF
CHARGE INJECTION vs.
VD VOLTAGE
Q (pC)
-20
0
20
-15
-10
0
10
15
VD (V)
DG444/5-10
V+ = 15V
V- = -15V
CL = 1nF
CHARGE INJECTION vs.
VD VOLTAGE
Q (pC)
-10
0
0
5
10
15
VD (V)
DG444/5-11
V+ = 12V
V- = 0V
CL = 1nF
10
DG444/DG445
Improved, Quad, SPST Analog Switches
6
_______________________________________________________________________________________
t
OFF
0.8 x V
OUT
V
OUT
0.8 x V
OUT
tf < 20ns
tr < 20ns
50%
0V
0V
+3V
SWITCH
OUTPUT
LOGIC INPUT WAVEFORM IS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
t
ON
SWITCH
INPUT
LOGIC
INPUT
+3V
IN
+5V
V-
-15V
( )
R
L
C
L
V
OUT
S
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
GND
REPEAT TEST FOR CHANNELS 2, 3, AND 4.
V
OUT
= V
D
R
L
R
L
+ r
DS(ON)
LOGIC
INPUT
V
L
+15V
V+
D
DG444
DG445
Figure 2. Switching Time
Applications Information
General Operation
Switches are open when power is off.
IN, D, and S should not exceed V+ or V-, even with
the power off.
Switch leakage is from each analog switch terminal
to V+ or V-, not to other switch terminals.
Operation with Supply Voltages
Other than 15V
Using supply voltages other than 15V will reduce the
analog signal range. The DG444/DG445 switches oper-
ate with 4.5V to 20V bipolar supplies or with a +10V
to +30V single supply; connect V- to 0V when operating
with a single supply. Also, all device types can operate
with unbalanced supplies such as +24V and -5V. V
L
must be connected to +5V to be TTL compatible, or to
V+ for CMOS-logic level inputs. The Typical Operating
Characteristics graphs show typical on-resistance with
20V, 15V, 10V, and 5V supplies. (Switching times
increase by a factor of two or more for operation at 5V.)
Overvoltage Protection
Proper power-supply sequencing is recommended
for all CMOS devices. Do not exceed the absolute
maximum ratings because stresses beyond the list-
ed ratings may cause permanent damage to the
devices. Always sequence V+ on first, followed by
V
L
, V-, and logic inputs. If power-supply sequenc-
ing is not possible, add two small, external signal
diodes in series with supply pins for overvoltage
protection (Figure 1). Adding diodes reduces the
analog signal range to 1V below V+ and 1V above
V-, but low switch resistance and low leakage char-
acteristics are unaffected. Device operation is
unchanged, and the difference between V+ and V-
should not exceed +44V.
V+
D
V-
S
V
g
Figure 1. Overvoltage Protection Using External Blocking Diodes
_____________________Pin Description
13
12
5
4
3, 14, 11, 6
2, 15, 10, 7
1, 16, 9, 8
IN1IN4
D1D4
S1S4
V-
GND
V
L
V+
Positive-Supply-
Voltage Input--
Connected to
Substrate
Logic-Supply
Voltage Input
Ground
Negative-Supply
Voltage Input
Source Outputs
Drain Outputs
Logic Control
Inputs
NAME
FUNCTION
11
10
3
2
1, 12, 9, 4
16, 13, 8, 5
15, 14, 7, 6
PIN
DIP/SO
QFN
DG444/DG445
Improved, Quad, SPST Analog Switches
_______________________________________________________________________________________
7
V
OUT
OFF
ON
OFF
V
OUT
IN
DG444
IN
DG445
OFF
OFF
ON
Q =
V
OUT
C
L
-15V
V-
V+
IN
GND
S
+15V
R
GEN
V
GEN
V
IN
= +3V
C
L
V
OUT
V
L
+5V
D
DG444
DG445
Figure 3. Charge Injection
NETWORK
ANALYZER
SIGNAL
GENERATOR
R
GEN
= 50
D
S
GND
R
L
10dBm
10nF
V+
+15V
IN
0V or +2.4V
V-
-15V
10nF
+5V
V
L
DG444
DG445
Figure 4. Off-Isolation Rejection Ratio
NETWORK
ANALYZER
SIGNAL
GENERATOR
R
GEN
= 50
0V or +2.4V
IN
D
GND
R
L
10dBm
10nF
+15V
D
IN
S
NC
0V or +2.4V
50
V-
-15V
10nF
+5V
S
V
L
V+
DG444
DG445
Figure 5. Crosstalk
CAPACITANCE
METER
D
S
GND
10nF
+15V
IN
0V or +2.4V
V-
-15V
10nF
f = 1MHz
+5V
V
L
V+
DG444
DG445
Figure 6. Source/Drain Off-Capacitance
D
S
GND
10nF
+15V
IN
0V or +2.4V
V-
-15V
10nF
V+
+5V
V
L
V
D
DG444
DG445
CAPACITANCE
METER
f = 1MHz
Figure 7. Source/Drain On-Capacitance
___________________Chip Topography
S2
V+
S3
V
L
S1
D2
D3
IN3
IN4
0.091"
(2.31mm)
0.071"
(1.80mm)
IN2
IN1
D1
V-
GND
D4
S4
TRANSISTOR COUNT: 126
SUBSTRATE CONNECTED TO V+
Ordering Information (continued)
*Contact factory for dice specifications.
16 Narrow SO
-40C to +85C
DG445DY
16 Plastic DIP
-40C to +85C
DG445DJ
Dice*
0C to +70C
DG445C/D
16 Narrow SO
0C to +70C
DG445CY
16 QFN
-40C to +85C
DG444EGE
PIN-PACKAGE
TEMP. RANGE
PART
16 Plastic DIP
0C to +70C
DG445CJ
16 QFN
-40C to +85C
DG445EGE
DG444/DG445
Improved, Quad, SPST Analog Switches
8
_______________________________________________________________________________________
Pin Configurations/Functional
______________Diagrams (continued)
TOP VIEW
16
D1
15
IN1
14
IN2
13
D2
5
D4
6
IN4
7
IN3
8
D3
DG444
2
V-
1
S1
3
GND
4
S4
11
V+
12
S2
10
V
L
9
S3
16
D1
15
IN1
14
IN2
13
D2
5
D4
6
IN4
7
IN3
8
D3
DG445
2
V-
1
S1
3
GND
4
S4
11
V+
12
S2
10
V
L
9
S3
*Contact factory for dice specifications.
DG444/DG445
Improved, Quad, SPST Analog Switches
_______________________________________________________________________________________
9
________________________________________________________Package Information
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
MIN
0.015
0.125
0.055
0.016
0.050
0.008
0.745
0.005
0.300
0.240
0.115
0
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
0
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
16-PIN PLASTIC
DUAL-IN-LINE
PACKAGE
DG444/DG445
Improved, Quad, SPST Analog Switches
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
Improved, Quad, SPST Analog Switches
___________________________________________Package Information (continued)
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ZIP