_______________General Description
Maxim’s redesigned DG408 and DG409 CMOS analog
multiplexers now feature guaranteed matching between
channels (8Ωmax) and flatness over the specified sig-
nal range (9Ωmax). These low on-resistance muxes
(100Ωmax) conduct equally well in either direction and
feature guaranteed low charge injection (15pC max). In
addition, these new muxes offer low input off-leakage
current over temperature—less than 5nA at +85°C.
The DG408 is a 1-of-8 multiplexer/demultiplexer and
the DG409 is a dual 4-channel multiplexer/demultiplex-
er. Both muxes operate with a +5V to +30V single sup-
ply and with ±5V to ±20V dual supplies. ESD protection
is guaranteed to be greater than 2000V per Method
3015.7 of MIL-STD-883. These improved muxes are
pin-compatible plug-in upgrades for the industry stan-
dard DG408 and DG409.
Applications
Sample-and-Hold Circuits
Test Equipment
Guidance and Control Systems
Communications Systems
Data-Acquisition Systems
Audio Signal Routing
____________________________Features
♦Pin-Compatible Plug-In Upgrades for
Industry Standard DG408/DG409
♦Guaranteed Matching Between Channels, 8ΩMax
♦Guaranteed On-Resistance Flatness, 9ΩMax
♦Guaranteed Low Charge Injection, 15pC Max
♦Low On-Resistance, 100ΩMax
♦Input Leakage, 5nA Max at +85°C
♦Low Power Consumption, 1.25mW Max
♦Rail-to-Rail Signal Handling
♦Digital Input Controls TTL/CMOS Compatible
♦ESD Protection >2000V per Method 3015.7
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
________________________________________________________________
Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
A2
GND
V+
S1
V-
EN
A0
TOP VIEW
DG408
S5
S6
S7
S8
D
S4
S3
S2
DIP/SO/TSSOP
DG409 appears at end of data sheet.
DECODERS/DRIVERS
A0 A1 A2 EN
S8
S7
S6
S5
S4
S3
S2
S1
D
V+ V- GND
DG409 appears at end of data sheet.
DG408 1-of-8 MUX/DEMUX
Pin Configurations Functional Diagrams
19-4725; Rev 4; 9/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
Ordering Information continued at end of data sheet.
*
Contact factory for dice specifications.
**
Contact factory for availability and processing to MIL-STD-883.
PART TEMP RANGE PIN-PACKAGE
DG408CUE 0°C to +70°C 16 TSSOP
DG408CJ 0°C to +70°C 16 Plastic DIP
DG408CY 0°C to +70°C 16 Narrow SO
DG408C/D 0°C to +70°C Dice*
DG408EUE 0°C to +70°C 16 TSSOP
DG408DJ -40°C to +85°C 16 Plastic DIP
DG408DY -40°C to +85°C 16 Narrow SO
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = 15V, V- = -15V, GND = 0V, VAH = +2.4V, VAL = +0.8V, TA= TMIN to TMAX, 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+ ............................................................................-0.3V, 44V
GND .........................................................................-0.3V, 25V
Digital Inputs, S, D (Note 1)....................(V- - 2V) to (V+ + 2V) or
30mA, (whichever occurs first)
Continuous Current (any terminal) ......................................30mA
Peak Current, S, D
(pulsed at 1ms, 10% duty cycle max) ..........................100mA
Continuous Power Dissipation (TA= +70°C)
TSSOP (derate 9.4mW/°C above +70°C) ....................755mW
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
DG408/DG409C_................................................0°C to +70°C
DG408/DG409D,E_ .........................................-40°C to +85°C
DG408/DG409AK ..........................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
VD= ±10V,
VS= ±10V,
sequence
each switch
on
VD= +10V,
VS= ±10V,
VEN = 0V
VD= +10V,
VS= ±10V,
VEN = 0V
IS= -1.0mA,
VD= ±10V
IS= -1.0mA,
VD= ±10V (Note 4)
VD= ±10V,
VS= +10V,
VEN = 0V
CONDITIONS
nA
-50 50
ID(ON)
Drain-On Leakage Current
(Note 5)
-10 10
-1 0.02 1
-100 100
-20 20
-1 0.02 1
nA
-50 50
ID(OFF)
Drain-Off Leakage Current
(Note 5)
-5 5
-1 0.02 1
-100 100
60 100
-10 10
-1 0.02 1
nA
-50 50
IS(OFF)
Source-Off Leakage Current
(Note 5) -5 5
Ω
125
rDS(ON)
Drain-Source
On-Resistance
1.5 8 Ω
10
ΔrDS(ON)
On-Resistance Matching
Between Channels
UNITS
MIN TYP MAX
(Note 2)
SYMBOLPARAMETER
Note 1: Signals on S_, D_, EN, A0, A1, or A2 exceeding V+ or V- are clamped by internal diodes. Limit forward current to
maximum current ratings.
V-15 15VANALOG
Analog Signal Range
IS= -1.0mA,
VD= ±5V or 0V
1.8 9 Ω
12
rFLAT
On-Resistance Flatness
(Note 3)
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
-0.5 0.01 0.5TA= +25°C
TA= TMIN
to TMAX
TA= +25°C
TA= TMIN
to TMAX
TA= +25°C
TA= TMIN
to TMAX
TA= +25°C
TA= TMIN
to TMAX
TA= +25°C
TA= TMIN
to TMAX
DG409
DG408
DG409
DG408
C, D
A
C, D
A
C, D
A
C, D
A
C, D
A
SWITCH
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = 15V, V- = -15V, GND = 0V, VAH = +2.4V, VAL = +0.8V, TA= TMIN to TMAX, unless otherwise noted.)
Off Isolation
(Note 6) dB-75VISO
215Q
Charge Injection
(Note 3)
ns
225
tON(EN)
Enable Turn-On Time 85 150
ns10 40tOPEN
Break-Before-Make Interval
85 175
µA-1.0 1.0IAL
Input Current with
Input Voltage Low
µA-1.0 1.0IAH
Input Current with
Input Voltage High
µA
-10 10
I-Negative Supply Current -1 1
mA
2
I+Positive Supply Current 0.075 0.5
V±5 ±20Power-Supply Range
16 30 µA
75
UNITS
MIN TYP MAX
(Note 2)
SYMBOLPARAMETER
Crosstalk Between Input
Channels VCT -92 dB
Logic Input Capacitance CIN 8pF
Source-Off Capacitance CS(OFF) 3pF
26
Drain-Off Capacitance CD(OFF)
f = 1MHz,
VEN = 0.8V
VD= 0V,
Figure 8 14
pF
37
Drain-On Capacitance
CD(ON)
+
CS(ON)
f = 1MHz,
VEN = 2.4V
VD= 0V,
Figure 8 25
pF
TA= +25°C
VEN = 0V or 2.4V,
VA= 0V
TA= +25°C
VA= 2.4V or 15V
TA= TMIN to TMAX
TA= TMIN to TMAX
TA= +25°C
TA= +25°C
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= +25°C
TA= +25°C
TA= TMIN to TMAX
CONDITIONS
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
VEN = 0V,
RL= 1kΩ,
f = 100kHz, Figure 6
CL= 1.0nF,
VS= 0V,
RS= 0Ω, Figure 5
Figure 3
VEN = 2.4V,
VA(ALL) = 0V or 2.4V
Figure 4
VEN = 2.4V,
VA(ALL) = 0V or 2.4V
VEN = VA= 0V or 4.5V
VEN = 2.4V,
f = 100kHz,
VGEN = 1VP-P,
RL= 1kΩ, Figure 7
f = 1MHz
f = 1MHz,
VEN = VS= 0V,
Figure 8
DG408
DG409
DG408
DG409
ns
250
tTRANS
Transition Time TA= TMIN to TMAX
Figure 2
pC
ns
300
tOFF(EN)
Enable Turn-Off Time 150
TA= TMIN to TMAX
TA= +25°C
Figure 3
INPUT
SUPPLY
DYNAMIC
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
4 _______________________________________________________________________________________
(Note 3)
CONDITIONS
CL= 1.0nF,
VS= 0V,
RS= 0Ω
VAL = 0V,
VS1 = 5V,
Figure 3
VAL = 0V,
VS1 = 5V,
Figure 3
VS1 = 8V,
VS8 = 0V,
VA= 0V,
Figure 2
IS= -1.0mA
VD= 3V or 10V
pC2QCharge Injection
ns75 300tOFF(EN)
Enable Turn-Off Time
(Note 3)
V012VANALOG
Analog Signal Range
ns100 600tON(EN)
Enable Turn-On Time
(Note 3)
ns115 450tTRANS
Transition Time
(Note 3)
Ω120 175rDS(ON)
Drain-Source On-Resistance
UNITS
MIN TYP MAX
(Note 2)
SYMBOLPARAMETER
ELECTRICAL CHARACTERISTICS—Single Supply
(V+ = 12V, V- = 0V, GND = 0V, VAH = +2.4V, VAL = +0.8V, TA= TMIN to TMAX, unless otherwise noted.)
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: Guaranteed by design.
Note 4: ΔRON = RON(MAX) - RON(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: Leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at +25°C.
Note 6: Off isolation = 20log VD/VS, where VD= output and VS= input to off switch.
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
SWITCH
DYNAMIC
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
_______________________________________________________________________________________ 5
120
140
160
ON-RESISTANCE vs. VD
(DUAL SUPPLIES)
100
DG408/9 TOC-01
0
20
40
60
-20 20-15 15-10 10-5 50
80
VD (V)
±5V
±10V
±15V
±20V
rDS(ON) (Ω)
120
ON-RESISTANCE vs. VD AND
TEMPERATURE (DUAL SUPPLIES)
100
DG408/9 TOC-02
0
20
40
60
-15 15-10 10-5 50
80
VD (V)
+125°C
+85°C
+25°C
-55°C
rDS(ON) (Ω)
V+ = 15V
V- = -15V
280
320
360
400
ON-RESISTANCE vs. VD
(SINGLE SUPPLY)
240
DG408/9 TOC-03
40
80
120
160
15 201050
200
VD (V)
rDS(ON) (Ω)
5V
10V
15V
20V
120
140
160
ON-RESISTANCE vs. VD AND
TEMPERATURE (SINGLE SUPPLY)
100
DG408/9 TOC-04
0
20
40
60
151050
80
VD (V)
rDS(ON) (Ω)
+125°C
+85°C
+25°C
-55°C
V+ = 15V
V- = 0V
30
CHARGE INJECTION vs. VD
20
DG408/9 TOC-07
-30
-20
-10
0
-15 15-10 10-5 50
10
VD (V)
Qj (pC)
V+ = 12V
V- = 0V
V+ = 15V
V- = -15V
10
0.0001
-55 125
OFF LEAKAGE vs. TEMPERATURE
1
DG408/9 TOC-05
TEMPERATURE (°C)
OFF LEAKAGE (nA)
25
0.01
0.001
-35 -15 65
0.1
100
1000
45 85 105
5
INO (OFF)
ICOM (ON)
V+ = 15V
V- = -15V
10
0.0001
-55 125
ON LEAKAGE vs. TEMPERATURE
1
DG408/9 TOC-05
TEMPERATURE (°C)
ON LEAKAGE (nA)
25
0.01
0.001
-35 -15 65
0.1
100
1000
45 85 105
5
ICOM (ON)
V+ = 15V
V- = -15V
100
0.001
-55 125
SUPPLY CURRENT vs. TEMPERATURE
10
DG408/9 TOC-08
TEMPERATURE (°C)
I+, I- (μA)
25
0.1
0.01
-35 -15 65
1
45 85 105
5
I+
I-
V+ = 15V
V- = -15V
VEN = VA = 0V, 4.5V
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
Applications Information
Operation with
Supply Voltages Other than 15V
Using supply voltages less than ±15V reduces the ana-
log signal range. The DG408/DG409 switches operate
with ±5V to ±20V bipolar supplies or with a +5V to
+40V single supply. Connect V- to GND when operat-
ing with a single supply. Both device types can also
operate with unbalanced supplies, such as +24V and
-5V. 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 maxi-
mum ratings, because stresses beyond the listed rat-
ings may cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs, S or D. If power-supply sequencing is not
possible, add two small 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 does not affect the
devices’ low switch resistance and low leakage charac-
teristics. Device operation is unchanged, and the differ-
ence between V+ and V- should not exceed +44V.
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
6 _______________________________________________________________________________________
______________________________________________________________Pin Description
Vg
SD
V-
V+
DG408
DG409
Figure 1. Overvoltage Protection Using External Blocking
Diodes
PIN
DG408 DG409 NAME FUNCTION
1, 15, 16 A0, A2, A1 Address Inputs
—
—
A0, A1 Address Inputs
2 2 EN Enable Input
3 3 V- Negative Supply Voltage Input
4–7 —S1–S4 Bidirectional Analog Inputs
—4–7 S1A–S4A Bidirectional Analog Inputs
8 — D Bidirectional Analog Output
—8, 9 DA, DB Bidirectional Analog Outputs
9–12 —S8–S5 Bidirectional Analog Inputs
—10–13 S4B–S1B Bidirectional Analog Inputs
13 14 V+ Positive Supply Voltage Input
14 15 GND Ground
1, 16
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
_______________________________________________________________________________________ 7
Test Circuits/Timing Diagrams
50%
tTRANS (OFF)
tR < 20ns
tF < 20ns
VOUT
+3V
0V
VS1
0V
VS8 or VS4B
LOGIC
INPUT
SWITCH
OUTPUT
+15V
VOUT
-15V
GND
V+
A1
V-
A2
A0
EN
S1
S2-S7
S8
D
±10V
+10V
50Ω
DG408
300Ω
35pF
+15V
VOUT
-15V
GND
V+
A0
V-
A1
EN
S1B
S1A-S4A
S4B
DB
±10V
50Ω
DG409
300Ω35pF
90%
90%
tTRANS (ON)
+10V
50%
tOFF(EN)
tR < 20ns
tF < 20ns
VOUT
+3V
0V
0V
LOGIC
INPUT
SWITCH
OUTPUT
+15V
VOUT
-15V
GND
V+
A1
V-
A0
A2
EN S1
S2-S8
D
-5V
50Ω
DG408
1k 35pF
90%
10%
tON(EN)
+15V
VOUT
-15V
GND
V+
A1
V-
A0
EN S1B
S1A-S4A
S2B-S4B,
DA
DB
-5V
50Ω
DG409
1k 35pF
Figure 2. Transition Time
Figure 3. Enable Switching Time
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
8 _______________________________________________________________________________________
50%
tOPEN
tR < 20ns
tF < 20ns
VOUT
+3V
0V
LOGIC
INPUT
SWITCH
OUTPUT
+15V
VOUT
-15V
GND
V+
A0
V-
A1
A2
EN
S1-S8
D
+5V
50Ω
DG408
300Ω
35pF
80%
+2.4V
0V
ΔVOUT
+3V
0V
LOGIC
INPUT
+15V
VOUT
-15V
GND
V+
A1
V-
A0
A2
EN
D
DG408
CL = 1000nF VOUT
S_
CHANNEL
SELECT
RS
VS
ONOFF OFF
ΔVOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = CL = ΔVOUT
Test Circuits/Timing Diagrams (continued)
Figure 4. Break-Before-Make Interval
Figure 5. Charge Injection
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
_______________________________________________________________________________________ 9
+15V
VOUT
-15V
GND
V+
A1
V-
A0
A2
S8
D
DG408
S1
RS = 50Ω
VIN
EN
10nF
RL = 1kΩ
OFF ISOLATION = 20log VOUT
VIN
10nF
+15V
VOUT
+2.4V
-15V
GND
V+
A1
V-
A0
A2
S8
D
DG408
S2
RS = 50Ω
VIN
10nF
RL = 1kΩ
CROSSTALK = 20log VOUT
VIN
10nF
S1
EN
+15V
-15V
GND
V+
A2
V-
A1
A0
S8
DG408
CHANNEL
SELECT
S1
D
EN
Meter
Impedance
Analyzer
or Equivalent
f = 1MHz
Test Circuits/Timing Diagrams (continued)
Figure 6. Off Isolation Figure 7. Crosstalk
Figure 8. Source/Drain Capacitance
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
10 ______________________________________________________________________________________
Pin Configurations/Functional Diagrams/Truth Tables (continued)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
GND
V+
S1B
S1A
V-
EN
A0
TOP VIEW
DG409
S2B
S3B
S4B
DB
DA
S4A
S3A
S2A
DIP/SO/TSSOP
CMOS DECODE LOGIC
A1 A0 EN
S4B
S3B
S2B
S1B
S4A
S3A
S2A
S1A
DA
V+ V- GND
DB
DG409 4-CHANNEL DIFFERENTIAL MUX/DEMUX
A2 A1 A0 EN ON
SWITCH
X
0
0
0
0
1
1
1
1
X
0
0
1
1
0
0
1
1
X
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
None
1
2
3
4
5
6
7
8
DG408
LOGIC “0” VAL ≤ 0.8V, LOGIC “1” VAH ≥ 2.4V
A1 A0 EN ON
SWITCH
X
0
0
1
1
X
0
1
0
1
0
1
1
1
1
None
1
2
3
4
DG409
LOGIC “0” VAL ≤ 0.8V, LOGIC “1” VAH ≥ 2.4V
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
______________________________________________________________________________________ 11
Ordering Information (continued)
*
Contact factory for dice specifications.
**
Contact factory for availability and processing to MIL-STD-883.
PART TEMP RANGE PIN-PACKAGE
DG408DK -40°C to +85°C 16 CERDIP
DG408AK
-55°C to +125°C
16 CERDIP**
DG408MY/PR
-55°C to +125°C
16 SO***
DG408MY/PR-T
-55°C to +125°C
16 SO***
DG409CUE 0°C to +70°C 16 TSSOP
DG409CJ 0°C to +70°C 16 Plastic DIP
DG409CY 0°C to +70°C 16 Narrow SO
DG409C/D 0°C to +70°C Dice*
DG409EUE -40°C to +85°C 16 TSSOP
DG409DJ -40°C to +85°C 16 Plastic DIP
DG409DK -40°C to +85°C 16 CERDIP
DG409AK
-55°C to +125°C
12 CERDIP**
DG409MY/PR
-55°C to +125°C
16 SO***
DG409MY/PR-T
-55°C to +125°C
16 SO***
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
16 TSSOP U16-1 21-0066
16 Plastic DIP P16-2 21-0043
16 Narrow SO S16-5 21-0041
16 SO S16-5 21-0041
16 CERDIP J16-3 21-0590
DG408/DG409
Improved, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
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.
12
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
3 8/02 Changed operating voltage and TSSOP packaging ⎯
4 9/08 Added rugged plastic information 1, 11
