19-4727; Rev 2; 6/99
Improved, Dual, High-Speed Analog Switches
_______________General Description
Maxim's redesigned DG401/DG403/DG405 analog
switches now feature guaranteed low on-resistance
matching between switches (2Ω max) and guaranteed
on-resistance flatness over the signal range (3Ω max).
These low on-resistance switches (20Ω typ) conduct
equally well in either direction and are guaranteed to
have low charge injection (15pC max). The new design
offers lower off leakage current over temperature (less
than 5nA at +85°C).
The DG401/DG403/DG405 are dual, high-speed
switches. The single-pole/single-throw DG401 and
double-pole/single-throw DG405 are normally open
dual switches. The dual, single-pole/double-throw
DG403 has two normally open and two normally closed
switches. Switching times are 150ns max for t
ON
and
100ns max for t
OFF
, with a maximum power consump-
tion of 35µW. These devices operate from a single
+10V to +30V supply, or bipolar supplies of ±4.5V to
±20V. Maxim's improved DG401/DG403/DG405 are
fabricated with a 44V silicon-gate process.
______________________New Features
o
Plug-In Upgrade for Industry-Standard
DG401/DG403/DG405
o
Improved r
DS(ON)
Match Between Channels (2Ω max)
o
Guaranteed r
FLAT(ON)
Over Signal Range (3Ω max)
o
Improved Charge Injection (15pC max)
o
Improved Off Leakage Current Over Temperature
(<5nA at +85°C)
DG401/DG403/DG405
__________________Existing Features
o
Low r
DS(ON)
(30Ω max)
o
Single-Supply Operation +10V to +30V
Bipolar-Supply Operation ±4.5V to ±20V
o
Low Power Consumption (35µW max)
o
Rail-to-Rail Signal Handling Capability
o
TTL/CMOS-Logic Compatible
______________Ordering Information
PART
DG401CJ
DG401CY
DG401C/D
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
________________________Applications
Sample-and-Hold Circuits
Guidance and Control Systems
Communications Systems
Battery-Operated Systems
Military Radios
Test Equipment
Heads-Up Displays
PBX, PABX
Audio Signal Routing
Ordering Information continued on last page.
*Contact factory for dice specifications.
_____________________Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
D1
1
N.C.
2
N.C.
3
N.C.
4
N.C.
5
N.C.
6
N.C.
7
D2
8
16
S1
15
IN1
14
V-
13
GND
D1
1
N.C.
2
D3
3
S3
4
S4
5
D4
6
N.C.
7
D2
8
16
S1
15
IN1
14
V-
13
GND
D1
1
N.C.
2
D3
3
S3
4
S4
5
D4
6
N.C.
7
D2
8
16
S1
15
IN1
14
V-
13
GND
DG401
12
V
L
11
V+
10
IN2
9
S2
DG403
12
V
L
11
V+
10
IN2
9
S2
DG405
12
V
L
11
V+
10
IN2
9
S2
DIP/SO
DG401
LOGIC
0
1
SWITCH
OFF
ON
LOGIC
0
1
DIP/SO
DG403
SWITCHES 1, 2 SWITCHES 3, 4
OFF
ON
ON
OFF
DIP/SO
DG405
LOGIC
0
1
SWITCH
OFF
ON
LCC packages on last page.
SWITCHES SHOWN FOR LOGIC "0" INPUT
N.C. = NOT INTERNALLY CONNECTED
1
________________________________________________________________
Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Improved, Dual, High-Speed Analog Switches
DG401/DG403/DG405
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 20mA
(whichever occurs first)
Continuous Current (any terminal) ......................................30mA
Continuous Current, S or D .................................................20mA
Peak Current, S or D
(pulsed at 1ms, 10% duty cycle max) ..........................100mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Plastic DIP(derate 10.53mW/°C above +70°C)...842mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW
16-Pin CERDIP (derate 10.00mW/°C above 70°C) .......800mW
20-Pin LCC (derate 9.09mW/°C above +70°C) ............727mW
Operating Temperature Ranges
DG40_C_ .............................................................0°C to +70°C
DG40_D_ ..........................................................-40°C to +85°C
DG40_A_ ........................................................-55°C to +125°C
Storage Temperature Range .............................-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 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
(V+ = 15V, V- = -15V, V
L
= +5V, GND = 0V, 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
SYMBOL
CONDITIONS
TEMP.
RANGE
MIN
TYP
MAX
UNITS
(Note 2)
+15
45
30
55
45
0.5
C, D, A
T
A
= T
MIN
to T
MAX
T
A
= +25°C
C, D, A
T
A
= T
MIN
to T
MAX
C, D
A
C, D
A
C, D
A
C, D
A
C, D
A
C, D
A
-0.50
-0.25
-5
-10
-0.50
-0.25
-5
-10
-1.0
-0.4
-10
-20
-0.01
-0.01
6
0.50
0.25
5
10
0.50
0.25
5
10
1.0
0.4
10
20
3
3
Ω
2
Ω
V
V
ANALOG
(Note 3)
V+ = 13.5V, V- = -13.5V,
I
S
= -10mA,
r
DS(ON)
V
D
= ±10V,
V
INH
= 2.4V,
V
INL
= 0.8V
V+ = 15V, V- = -15V,
I
S
= -10mA,
V
D
= ±10V
-15
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
C,D
A
C,D
A
20
20
Ω
Drain-Source
On-Resistance Match
∆r
DS(ON)
Between Channels (Note 4)
On-Resistance Flatness
(Note 4)
Source-Off
Leakage Current
(Note 7)
Drain-Off
Leakage Current
(Note 7)
Drain-On
Leakage Current
(Note 7)
V+ = 15V, V- = -15V,
r
FLAT(ON)
I
S
= -10mA,
V
D
= ±5V, 0V
I
S(OFF)
V+ = 16.5V, V- = -16.5V, T
A
= +25°C
V
D
= 15.5V,
V
S
= ±15.5V,
T
A
= T
MIN
to T
MAX
V+ = 16.5V, V- = -16.5V, T
A
= +25°C
V
D
= ±15.5V,
V
S
= 15.5V
T
A
= T
MIN
to T
MAX
V+ = 16.5V, V- = -16.5V, T
A
= +25°C
V
D
= ±15.5V,
V
S
= ±15.5V
T
A
= T
MIN
to T
MAX
±
±
nA
I
D(OFF)
-0.01
-0.01
nA
I
D(ON)
or
I
S(ON)
-0.04
-0.04
nA
2
_______________________________________________________________________________________
Improved, Dual, High-Speed Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, V- = -15V, V
L
= +5V, GND = 0V, V
INH
= +2.4V, V
INL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
INPUT
Input Current with Input Voltage High
Input Current with Input Voltage Low
SUPPLY
Power-Supply Range
Positive Supply Current
I+
All channels on or off,
T
A
= +25°C
V+ = 16.5V, V- = -16.5V,
T
A
= T
MIN
to T
MAX
V
IN
= 0V or 5V
All channels on or off,
T
A
= +25°C
V+ = 16.5V, V- = -16.5V,
T
A
= T
MIN
to T
MAX
V
IN
= 0V or 5V
All channels on or off,
T
A
= +25°C
V+ = 16.5V, V- = -16.5V,
T
A
= T
MIN
to T
MAX
V
IN
= 0V or 5V
All channels on or off,
T
A
= +25°C
V+ = 16.5V, V- = -16.5V,
T
A
= T
MIN
to T
MAX
V
IN
= 0V or 5V
Figure 2
Figure 2
DG403 only,
Figure 3
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
10
±4.5
-1.0
-5.0
-1.0
-5.0
-1.0
-5.0
-1.0
-5.0
0.01
0.01
0.01
0.01
±20
1.0
µA
5.0
1.0
µA
5.0
1.0
µA
5.0
1.0
µA
5.0
V
I
INH
I
INL
V
IN
= 2.4V, all others = 0.8V
V
IN
= 0.8V, all others = 2.4V
-1.0
-1.0
0.005
0.005
1.0
1.0
µA
µA
SYMBOL
CONDITIONS
MIN
TYP MAX
UNITS
(Note 2)
DG401/DG403/DG405
Negative Supply Current
I-
Logic Supply Current
I
L
Ground Current
DYNAMIC
Turn-On Time
Turn-Off Time
Break-Before-Make Delay (Note 3)
Charge Injection (Note 3)
Off Isolation (Note 5)
Crosstalk (Note 6)
Source-Off Capacitance
Drain-Off Capacitance
Channel-On Capacitance
I
GND
t
ON
t
OFF
t
D
Q
OIRR
100
60
20
10
72
90
12
12
39
150
100
ns
ns
ns
C
L
= 1.0nF, V
GEN
= 0V,
T
A
= +25°C
R
GEN
= 0Ω, Figure 4
R
L
= 100Ω, C
L
= 5pF,
f = 1MHz, Figure 5
R
L
= 50Ω, C
L
= 5pF,
f = 1MHz, Figure 6
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
15
pC
dB
dB
pF
pF
pF
C
S(OFF)
C
D(OFF)
f = 1MHz, Figure 7
f = 1MHz, Figure 7
C
D(ON)
f = 1MHz, Figure 8
or C
S(ON)
Note 2:
This data sheet uses the algebraic convention, where the most negative value is a minimum and the most positive value is a
maximum.
Note 3:
Guaranteed by design.
Note 4:
∆r
ON
=
∆r
ON
(max) -
∆r
ON
(min). On-resistance match between channels and flatness are guaranteed only with specified
voltages. 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:
Off isolation = 20log (V
S
/V
D
), V
D
= output, V
S
= input to off switch.
Note 6:
Between any two switches.
Note 7:
Leakage parameters I
S(OFF)
, I
D(OFF)
, and I
D(ON)
are 100% tested at the maximum rated hot temperature and guaranteed by
correlation at +25°C.
_______________________________________________________________________________________
3
Improved, Dual, High-Speed Analog Switches
DG401/DG403/DG405
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
D
(DUAL SUPPLIES)
50
45
40
r
DS (ON)
(Ω)
35
30
25
20
15
10
5
-20
-10
0
V
D
(V)
10
20
5
-20
-10
0
V
D
(V)
10
20
C
D
10
V+ = 15V, V- = -15V
20
0
5
10
V
D
(V)
15
20
40
B
r
DS (ON)
(Ω)
A:
B:
C:
D:
V+ = 5V, V- = -5V
V+ = 10V, V- = -10V
V+ = 15V, V- = -15V
V+ = 20V, V- = -20V
MAX401-1
ON-RESISTANCE vs. V
D
AND
TEMPERATURE (DUAL SUPPLIES)
MAX401-2
ON-RESISTANCE vs. V
D
(SINGLE SUPPLY)
V- = 0V
120
100
r
DS (ON)
(Ω)
80
60
V+ = 10V
V+ = 15V
V+ = 20V
MAX401-3
55
35
30
25
20
15
T
A
= -55°C
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
140
A
V+ = 5V
ON-RESISTANCE vs. V
D
AND
TEMPERATURE (SINGLE SUPPLY)
MAX401-4
OFF LEAKAGE CURRENTS vs.
TEMPERATURE
MAX401-5
ON LEAKAGE CURRENTS vs.
TEMPERATURE
V+ = 16.5V
V- = -16.5V
V
D
= ±15V
V
S
= ±15V
MAX401-6
70
60
T
A
= +125°C
100
10
OFF LEAKAGE (nA)
1
0.1
0.01
V+ = 16.5V
V- = -16.5V
V
D
= ±15V
V
S
= ±15V
100
10
ON LEAKAGE (nA)
1
0.1
0.01
50
r
DS (ON)
(Ω)
40
30
20
V+ = 12V, V- = 0V
10
0
5
10
V
D
(V)
T
A
= +85°C
T
A
= +25°C
0.001
0.0001
15
20
-55
25
TEMPERATURE (°C)
125
0.001
0.0001
-55
25
TEMPERATURE (°C)
125
CHARGE INJECTION vs.
ANALOG VOLTAGE
MAX401-7
SUPPLY CURRENT vs.
TEMPERATURE
MAX401-8
60
40
20
Q (pC)
0
-20
-40
V+ = 15V, V- = -15V
-60
-20
-10
0
V
D
(V)
10
100
10
1
0.1
0.01
0.001
0.0001
I+, I-, I
L
(µA)
I+ at V+ = 16.5V
I- at V- = -16.5V
I
L
at V
L
= 5V
20
-55
25
TEMPERATURE (°C)
125
4
_______________________________________________________________________________________
Improved, Dual, High-Speed Analog Switches
_____________________Pin Description
DG401
DIP/SO
LCC
1, 8
2-7
9, 16
10, 15
11
12
13
14
DG403
DIP/SO
1, 8, 3, 6
2, 7
16, 9, 4, 5
10, 15
11
12
13
14
DG405
DIP/SO
1, 8, 3, 6
2, 7
16, 9, 4, 5
10, 15
11
12
13
14
LCC
2, 10, 4, 8
1, 3, 6, 9,
11, 16
20, 12,
5, 7,
13, 19
14
15
17
18
LCC
2, 10, 4, 8
1, 3, 6, 9,
11, 16
20, 12,
5, 7,
13, 19
14
15
17
18
2, 10
1, 3-9,
11, 16
12, 20
13, 19
14
15
17
18
NAME
D1, D2
N.C.
S2, S1
FUNCTION
Drain (Analog Signal)
Not internally connected
Source (Analog Signal)
Positive Supply-Voltage
Input—connected to
substrate
Logic Supply-Voltage Input
Ground
Negative Supply-Voltage
Input
FUNCTION
Drain (Analog Signal)
Not internally connected
Source (Analog Signal)
__________Applications Information
Operation with Supply Voltages
Other than ±15V
The DG401/DG403/DG405 switches operate with
±4.5V to ±20V bipolar supplies or with a +10V to +30V
single supply. In either case, analog signals ranging
from V+ to V- can be switched. The
Typical Operating
Characteristics
graphs illustrate typical analog-signal
and supply-voltage on-resistance variations. The usual
on-resistance temperature coefficient is 0.5%/°C (typ).
DG401/DG403/DG405
IN2, IN1 Digital Logic Inputs
V+
V
L
GND
V-
NAME
D1-D4
N.C.
S1-S4
Logic Inputs
These devices operate with a single positive supply or
with bipolar supplies. They maintain TTL compatibility
with supplies anywhere in the ±4.5V to ±20V range as
long as V
L
= +5V. If V
L
is connected to V+ or another
supply at voltages other than +5V, the devices will
operate at CMOS-logic-level inputs.
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute
maximum ratings because stresses beyond the listed
ratings may cause permanent damage to the devices.
Always sequence V+ on first, followed by V
L
, V-, and
logic inputs. If power-supply sequencing 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 below V-, without affect-
ing low switch resistance and low leakage
characteristics. Device operation is unchanged, and
the difference between V+ and V- should not exceed
+44V.
V+
IN2, IN1 Digital Logic Inputs
V+
V
L
GND
V-
NAME
D1-D4
N.C.
S1-S4
Positive Supply-Voltage
Input—connected to
substrate
Logic Supply-Voltage Input
Ground
Negative Supply-Voltage
Input
FUNCTION
Drain (Analog Signal)
Not internally connected
Source (Analog Signal)
S
D
IN2, IN1 Digital Logic Inputs
V+
V
L
GND
V-
Positive Supply-Voltage
Input—connected to
substrate
Logic Supply-Voltage Input
Ground
Negative Supply Voltage
V
g
V-
Figure 1. Overvoltage Protection Using External Blocking Diodes
_______________________________________________________________________________________
5
京公网安备 11010802033920号
EEWORLD
