1
File Number
3586.5
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright Intersil Corporation 1999
DG444, DG445
Monolithic, Quad SPST, CMOS Analog
Switches
The DG444 and DG445 monolithic CMOS analog switches
are drop-in replacements for the popular DG211 and DG212
series devices. They include four independent single pole
single throw (SPST) analog switches and TTL and CMOS
compatible digital inputs.
These switches feature lower analog ON resistance (<85
)
and faster switch time (t
ON
<250ns) compared to the DG211
and DG212. Charge injection has been reduced, simplifying
sample and hold applications.
The improvements in the DG444 series are made possible
by using a high voltage silicon-gate process. An epitaxial
layer prevents the latch-up associated with older CMOS
technologies. The 44V maximum voltage range permits
controlling
20V signals when operating with
20V power
supplies.
The four switches are bilateral, equally matched for AC or
bidirectional signals. The ON resistance variation with
analog signals is quite low over a
5V analog input range.
The switches in the DG444 and DG445 are identical,
differing only in the polarity of the selection logic.
Pinout
DG444, DG445 (PDIP, SOIC)
TOP VIEW
Features
ON Resistance (Max) . . . . . . . . . . . . . . . . . . . . . . . . . 85
Low Power Consumption (P
D
) . . . . . . . . . . . . . . . . <35
W
Fast Switching Action
- t
ON
(Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250ns
- t
OFF
(Max, DG444) . . . . . . . . . . . . . . . . . . . . . . . 140ns
Low Charge Injection
Upgrade from DG211/DG212
TTL, CMOS Compatible
Single or Split Supply Operation
Applications
Audio Switching
Battery Operated Systems
Data Acquisition
Hi-Rel Systems
Sample and Hold Circuits
Communication Systems
Automatic Test Equipment
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
IN
1
D
1
S
1
V-
GND
S
4
IN
4
D
4
IN
2
S
2
V+
V
L
S
3
D
3
IN
3
D
2
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG. NO.
DG444DJ
-40 to 85
16 Ld PDIP
E16.3
DG444DY
-40 to 85
16 Ld SOIC
M16.15
DG445DJ
-40 to 85
16 Ld PDIP
E16.3
DG445DY
-40 to 85
16 Ld SOIC
M16.15
Data Sheet
June 1999
2
Functional Diagrams
Schematic Diagram
(One Channel
)
TRUTH TABLE
LOGIC
V
IN
DG444
DG445
0
0.8V
ON
OFF
1
2.4V
OFF
ON
S
1
D
1
S
2
D
2
S
3
D
3
S
4
D
4
IN
1
DG444
IN
2
IN
3
IN
4
S
1
D
1
S
2
D
2
S
3
D
3
S
4
D
4
IN
1
DG445
SWITCHES SHOWN FOR LOGIC "1" INPUT
IN
2
IN
3
IN
4
Pin Descriptions
PIN
SYMBOL
DESCRIPTION
1
IN
1
Logic Control for Switch 1
2
D
1
Drain (Output) Terminal for Switch 1
3
S
1
Source (Input) Terminal for Switch 1
4
V-
Negative Power Supply Terminal
5
GND
Ground Terminal (Logic Common)
6
S
4
Source (Input) Terminal for Switch 4
7
D
4
Drain (Output) Terminal for Switch 4
8
IN
4
Logic Control for Switch 4
9
IN
3
Logic Control for Switch 3
10
D
3
Drain (Output) Terminal for Switch 3
11
S
3
Source (Input) Terminal for Switch 3
12
V
L
Logic Reference Voltage.
13
V+
Positive Power Supply Terminal (Substrate)
14
S
2
Source (Input) Terminal for Switch 2
15
D
2
Drain (Output) Terminal for Switch 2
16
IN
2
Logic Control for Switch 2
S
D
V+
IN
X
GND
V-
V-
V+
V
L
DG444, DG445
3
Absolute Maximum Ratings
Thermal Information
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44V
GND to V-. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 1ms, 10% Duty Cycle Max) . . 100mA
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20V (Max)
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to 125
o
C
Input Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8V (Max)
Input High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4V (Min)
Input Rise and Fall Time . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20ns
Thermal Resistance (Typical, Note 2)
JA
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
115
Maximum Junction Temperature (Plastic Packages) . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300
o
C
(SOIC - Lead Tips Only)
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Signals on S
X
, D
X
, or IN
X
exceeding V+ or V- will be clamped by internal diodes. Limit forward diode current to maximum current ratings.
2.
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
Test Conditions: V+ = +15V, V- = -15V, V
L
= 5V, V
IN
= 2.4V, 0.8V (Note 3),
Unless Otherwise Specified
PARAMETER
TEST CONDITIONS
TEMP
(
o
C)
(NOTE 4)
MIN
(NOTE 5)
TYP
(NOTE 4)
MAX
UNITS
DYNAMIC CHARACTERISTICS
Turn-ON Time, t
ON
R
L
= 1k
, C
L
= 35pF, V
S
=
10V
(Figure 1)
25
-
120
250
ns
Turn-OFF Time, t
OFF
DG444
25
-
110
140
ns
DG445
25
-
160
210
ns
Charge Injection, Q (Figure 2)
C
L
= 1nF, V
G
= 0V, R
G
= 0
25
-
-1
-
pC
OFF Isolation (Figure 4)
R
L
= 50
, C
L
= 5pF, f = 1MHz
25
-
60
-
dB
Crosstalk (Channel-to-Channel)
(Figure 3)
25
-
-100
-
dB
Source OFF Capacitance, C
S(OFF)
f = 1MHz, V
ANALOG
= 0 (Figure 5)
25
-
4
-
pF
Drain OFF Capacitance, C
D(OFF)
25
-
4
-
pF
Channel ON Capacitance,
C
D(ON)
+ C
S(ON)
25
-
16
-
pF
DIGITAL INPUT CHARACTERISTICS
Input Current V
IN
Low, I
IL
V
IN
Under Test = 0.8V,
All Others = 2.4V
Full
-0.5
-0.00001
0.5
A
Input Current V
IN
High, I
IH
V
IN
Under Test = 2.4V,
All Others = 0.8V
Full
-0.5
0.00001
0.5
A
ANALOG SWITCH CHARACTERISTICS
Analog Signal Range, V
ANALOG
Full
-15
-
15
V
Drain-Source ON Resistance,
r
DS(ON)
I
S
=
10mA, V
D
=
8.5V,
V+ = 13.5V, V- = -13.5V
25
-
50
85
Full
-
-
100
Source OFF Leakage Current, I
S(OFF)
V+ = 16.5V, V- = -16.5V,
V
D
=
15.5V, V
S
=
15.5V
25
-0.5
0.01
0.5
nA
85
-5
-
5
nA
DG444, DG445
4
Drain OFF Leakage Current,
I
D(OFF)
V+ = 16.5V, V- = -16.5V,
V
D
=
15.5V, V
S
=
15.5V
25
-0.5
0.01
0.5
nA
85
-5
-
5
nA
Channel ON Leakage Current,
I
D(ON)
+ I
S(ON)
V+ = 16.5V, V- = -16.5V,
V
S
= V
D
, =
15.5V
25
-0.5
0.08
0.5
nA
85
-10
-
10
nA
POWER SUPPLY CHARACTERISTICS
Positive Supply Current, I+
V+ = 16.5V, V- = -16.5V,
V
IN
= 0V or 5V
25
-
0.001
1
A
85
-
-
5
A
Negative Supply Current, I-
25
-1
-0.0001
-
A
85
-5
-
-
A
Logic Supply Current, I
L
25
-
0.001
1
A
85
-
-
5
A
Ground Current, I
GND
25
-1
-0.001
-
A
85
-5
-
-
A
Electrical Specifications
Test Conditions: V+ = +15V, V- = -15V, V
L
= 5V, V
IN
= 2.4V, 0.8V (Note 3),
Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
TEMP
(
o
C)
(NOTE 4)
MIN
(NOTE 5)
TYP
(NOTE 4)
MAX
UNITS
Electrical Specifications
(Single Supply) Test Conditions: V+ = 12V, V- = 0V, V
L
= 5V, V
IN
= 2.4V, 0.8V (Note 3),
Unless Otherwise Specified
PARAMETER
TEST CONDITIONS
TEMP
(
o
C)
(NOTE 4)
MIN
(NOTE 5)
TYP
(NOTE 4)
MAX
UNITS
DYNAMIC CHARACTERISTICS
Turn-ON Time, t
ON
R
L
= 1k
, C
L
= 35pF, V
S
= 8V
(Figure 1)
25
-
300
450
ns
Turn-OFF Time, t
OFF
25
-
60
200
ns
Charge Injection, Q (Figure 2)
C
L
= 1nF, V
G
= 6V, R
G
= 0
25
-
2
-
pC
ANALOG SWITCH CHARACTERISTICS
Analog Signal Range, V
ANALOG
Full
0
-
12
V
Drain-Source ON Resistance, r
DS(ON)
I
S
= -10mA, V
D
= 3V, 8V
V+ = 10.8V, V
L
= 5.25V
25
-
100
160
Full
-
-
200
POWER SUPPLY CHARACTERISTICS
Positive Supply Current, I+
V+ = 13.2V, V
IN
= 0V or 5V,
V
L
= 5.25V
25
-
0.001
1
A
Full
-
-
5
A
Negative Supply Current, I-
25
-1
-0.0001
-
A
Full
-5
-
-
A
Logic Supply Current, I
L
25
-
0.001
1
A
Full
-
-
5
A
Ground Current, I
GND
25
-1
-0.001
-
A
Full
-5
-
-
A
NOTES:
3. V
IN
= input voltage to perform proper function.
4. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
5. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
DG444, DG445
5
Test Circuits and Waveforms
V
O
is the steady state output with the switch on. Feedthrough via switch capacitance may result in spikes at the leading and trailing
edge of the output waveform.
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1B. TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
FIGURE 2A. MEASUREMENT POINTS
FIGURE 2B. TEST CIRCUIT
FIGURE 2. CHARGE INJECTION
FIGURE 3. CROSSTALK TEST CIRCUIT
FIGURE 4. OFF ISOLATION TEST CIRCUIT
NOTE: Logic input waveform is inverted for switches that have
the opposite logic sense.
50%
t
r
< 20ns
t
f
< 20ns
t
OFF
80%
3V
0V
V
S
0V
t
ON
V
O
LOGIC
INPUT
SWITCH
INPUT
SWITCH
OUTPUT
80%
Repeat test for Channels 2, 3 and 4.
For load conditions, see Specifications. C
L
includes fixture and
stray capacitance.
V
O
V
S
R
L
R
L
r
DS ON
(
)
+
------------------------------------
=
SWITCH
INPUT
LOGIC
INPUT
S
1
IN
1
3V
V+
D
1
R
L
C
L
V
O
GND
V-
V
L
SWITCH
V
O
IN
X
OFF
ON
IN
X
OFF
OFF
OFF
ON
Q =
V
O
x C
L
(DG444)
(DG445)
OUTPUT
V+
D
1
C
L
V
O
GND
V-
V
IN
= 3V
R
G
V
G
V
L
0V, 2.4V
ANALYZER
+15V
V+
C
V
S
10dBm
SIGNAL
GENERATOR
R
L
GND
IN
1
V
D
IN
2
50
0V, 2.4V
NC
V-
-15V
C
V
D
ANALYZER
R
L
+15V
10dBm
SIGNAL
GENERATOR
V+
C
V-
-15V
C
0V, 2.4V
V
S
V
D
IN
X
GND
DG444, DG445
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