19-4705; Rev 4; 6/04
Improved, Quad, SPST Analog Switches
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 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 +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 sup-
plies. Maxim’s improved DG444/DG445 continue to be
fabricated with a 44V silicon-gate process.
♦
♦
♦
♦
♦
New Features
Plug-In Upgrades for Industry-Standard DG444/DG445
Improved R
ON
Match 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
DG444/DG445
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
________________________Applications
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
DG444CJ
DG444CY
DG444C/D
DG444DJ
DG444DY
Ordering Information
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
16 Plastic DIP
16 Narrow SO
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
IN1
D1
S1
V-
GND
S4
D4
IN4
1
2
3
4
5
6
7
8
16
IN2
15
D2
14
S2
13
V+
D1
16
IN1
IN2
14
D2
15
13
S1
V-
GND
S4
1
2
12
11
S2
V+
V
L
S3
DG444
12
V
L
11
S3
10
D3
9
IN3
DG444
3
4
5
D4
6
IN4
10
9
7
IN3
8
D3
DIP/SO
LOGIC
0
1
DG444
SWITCH
ON
OFF
Thin QFN
SWITCHES SHOWN FOR LOGIC "0" INPUT
Pin Configurations continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
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.
Improved, Quad, SPST Analog Switches
DG444/DG445
ABSOLUTE MAXIMUM RATINGS
(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
= +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.
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—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.)
PARAMETER
SWITCH
Analog Signal Range
Drain-Source
On-Resistance
On-Resistance Match
Between Channels (Note 4)
V
ANALOG
R
DS(ON)
(Note 3)
V+ = 13.5V, V- = -13.5V,
V
D
= ±8.5V, I
S
= -10mA
V
D
= ±10V,
I
S
= -10mA
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-0.50
-5
-0.50
-5
-0.50
-10
+0.08
+0.01
+0.01
-15
50
+15
85
100
4
5
9
15
+0.50
nA
+5
+0.50
nA
+5
+0.50
nA
+10
V
Ω
SYMBOL
CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
∆R
DS(ON)
Ω
V
D
= ±5V,
On-Resistance Flatness (Note 4)
R
FLAT(ON)
I
S
= -10mA
Source Leakage Current
(Note 5)
Drain Off-Leakage Current
(Note 5)
Drain On-Leakage Current
(Note 5)
INPUT
Input Current with
Input Voltage High
Input Current with
Input Voltage Low
I
INH
I
INL
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
V+ = 16.5V, V- = -16.5V,
V
D
= ±15.5V,
V
S
= ±15.5V
±
±
Ω
I
S(OFF)
I
D(OFF)
I
D(ON)
or
I
S(ON)
V
IN
= 2.4V, all others = 0.8V
V
IN
= 0.8V, all others = 2.4V
-0.5
-0.5
-0.00001
-0.00001
+0.5
+0.5
µA
µA
2
_______________________________________________________________________________________
Improved, Quad, SPST Analog Switches
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.)
PARAMETER
SWITCH
Power-Supply Range
Positive Supply Current
V+, V-
I+
All channels on or off, V+ =
16.5V, V- = -16.5V, V
IN
= 0V
or 5V
All channels on or off, V+ =
16.5V, V- = -16.5V, V
IN
= 0V
or 5V
All channels on or off, V+ =
16.5V, V- = -16.5V, V
IN
= 0V
or 5V
All channels on or off, V+ =
16.5V, V- = -16.5V, V
IN
= 0V
or 5V
V
S
= ±10V, Figure 2
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
±4.5
-1
-5
-1
-5
-1
-5
-1
-5
150
90
110
5
60
100
4
4
16
16
-0.0001
-0.001
-0.0001
-0.001
±20.0
+1
µA
+5
+1
µA
+5
+1
µA
+5
+1
µA
+5
250
120
170
10
ns
ns
ns
pC
dB
dB
pF
pF
pF
pF
V
SYMBOL
CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
DG444/DG445
Negative Supply Current
I-
Logic Supply Current
I
L
Ground Current
INPUT
Turn-On Time
Turn-Off Time
I
GND
t
ON
t
OFF
DG444, V
S
= ±10V, Figure 2 T
A
= +25°C
DG445, V
S
= ±10V, Figure 2 T
A
= +25°C
Charge Injection (Note 3)
Off-Isolation Rejection
Ratio (Note 6)
Crosstalk (Note 7)
Source Off-Capacitance
Drain Off-Capacitance
Source On-Capacitance
Drain On-Capacitance
C
S(OFF)
C
D(OFF)
C
S(ON)
C
D(ON)
Q
OIRR
C
L
= 1nF, V
GEN
= 0,
R
GEN
= 0Ω, Figure 3
R
L
= 50Ω, C
L
= 5pF,
f = 1MHz, Figure 4
R
L
-50Ω, C
L
= 5pF,
f = 1MHz, Figure 5
f = 1MHz, Figure 6
f = 1MHz, Figure 6
f = 1MHz, Figure 7
f = 1MHz, Figure 7
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
_______________________________________________________________________________________
3
Improved, Quad, SPST Analog Switches
DG444/DG445
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.)
PARAMETER
SWITCH
Analog Signal Range
Drain-Source
On-Resistance
SUPPLY
Power-Supply Range
Power-Supply Current
Negative Supply Current
Logic Supply Current
Ground Current
DYNAMIC
Turn-On Time
Turn-Off Time
Charge Injection (Note 3)
t
ON
t
OFF
Q
V
S
= 8V, Figure 2
V
S
= 8V, Figure 2
C
L
= 1nF, V
GEN
= 0,
R
GEN
= 0Ω, Figure 3
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
300
60
5
400
200
10
ns
ns
pC
V+, V-
I+
I-
I
L
I
GND
All channels on or off,
V
IN
= 0V or 5V
All channels on or off,
V
IN
= 0V or 5V
All channels on or off,
V
IN
= 0V or 5V
All channels on or off,
V
IN
= 0V or 5V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
10.8
-1
-5
-1
-5
-1
-5
-1
-5
+0.001
-0.0001
+0.001
-0.0001
24.0
+1
+5
+1
+5
+1
+5
+1
+5
V
µA
µA
µA
µA
V
ANALOG
R
DS(ON)
(Note 3)
V+ = 10.8V; V
L
= 5.25V;
V
D
= 3V, 8V; I
S
= -10mA
T
A
= +25°C
T
A
= T
MIN
to T
MAX
0
100
12
160
200
V
Ω
SYMBOL
CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
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)
are 100% tested at the maximum rated hot temperature and guaranteed at +25°C.
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
= +25°C, unless otherwise noted.)
ON-LEAKAGE CURRENTS
DG444/5-1
OFF-LEAKAGE CURRENTS
DG444/5-2
SWITCHING THRESHOLD vs.
BIPOLAR SUPPLY VOLTAGE
DG444/5-3
2
1
3.5
3.0
2.5
IN HI MIN
1
OFF-LEAKAGE (nA)
ON-LEAKAGE (nA)
T
A
= +125°C
0
T
A
= +85°C
-1
V+ = 15V
V- = -15V
-2
-15
-10
-5
0
VS, VD (V)
5
10
15
0.5
T
A
= +125°C
0
VIN (V)
2.0
1.5
-0.5
IN LOW MAX
T
A
= +85°C
V+ = 15V
V- = -15V
-15
-10
-5
5
0
VS, VD (V)
10
15
0.5
0
±5
±10
±15
±20
BIPOLAR SUPPLY VOLTAGE (V)
-1
4
_______________________________________________________________________________________
Improved, Quad, SPST Analog Switches
DG444/DG445
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. VD
AND UNIPOLAR-SUPPLY VOLTAGE
DG444/5-4
ON-RESISTANCE vs. VD AND
BIPOLAR-SUPPLY VOLTAGE
DG444/5-5
ON-RESISTANCE vs. VD, BIPOLAR-
SUPPLY VOLTAGE AND TEMPERATURE
V+ = 15V, V- = -15V
DG444/5-6
150
V+ = 5V
125
V+ = 10V
100
r
DS(ON)
(Ω)
120
±5V
90
r
DS(ON)
(Ω)
±10V
±15V
30
±20V
100
80
T
A
= +125°C
T
A
= +25°C
T
A
= -55°C
20
V+ = 15V
75
50
25
0
0
5
10
VD (V)
15
20
V+ = 20V
60
r
DS(ON)
(Ω)
0
VD (V)
10
20
60
40
0
-20
-10
0
-15
-10
-5
0
VD (V)
5
10
15
ON-RESISTANCE vs. VD, UNIPOLAR-
SUPPLY VOLTAGE AND TEMPERATURE
DG444/5-7
SWITCHING TIME vs.
BIPOLAR-SUPPLY VOLTAGE
DG444/5-8
SWITCHING TIME vs.
UNIPOLAR-SUPPLY VOLTAGE
V- = 0V
150
TIME (ns)
DG444/5-9
150
T
A
= +125°C
125
160
200
120
100
r
DS(ON)
(Ω)
75
50
40
25
0
0
4
VD (V)
8
12
V+ = 12V
V- = 0V
tOFF
0
±5
±10
±15
±20
BIPOLAR-SUPPLY VOLTAGE (V)
T
A
= +25°C
TIME (ns)
tON
80
T
A
= -40°C
100
tON
50
tOFF
0
10
15
20
UNIPOLAR-SUPPLY VOLTAGE (V)
25
CHARGE INJECTION vs.
VD VOLTAGE
DG444/5-10
CHARGE INJECTION vs.
VD VOLTAGE
V+ = 12V
V- = 0V
CL = 1nF
DG444/5-11
20
V+ = 15V
V- = -15V
CL = 1nF
10
Q (pC)
0
Q (pC)
-15
-10
0
VD (V)
10
15
0
-20
-10
0
5
VD (V)
10
15
_______________________________________________________________________________________
5
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