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MAX4709
User Manual
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MAXIM MAX4708, MAX4709 User Manual

General Description
The MAX4708/MAX4709 8-to-1 and dual 4-to-1 fault-pro­tected multiplexers are pin compatible with the industry­standard DG508/DG509. The MAX4708/MAX4709 are similar to the MAX4508/MAX4509, but these devices do not have clamp diodes to the supply rails on the switch outputs. These multiplexers feature fault-protected inputs, rail-to-rail signal-handling capability, and do not require power-supply sequencing.
Both devices offer ±40V overvoltage protection with the supplies off, ±36V protection with the supplies on, and feature 400Ω (max) on-resistance with 15Ω (max) matching between channels. The MAX4708/MAX4709 operate with dual supplies of ±4.5V to ±20V or a single supply of +9V to +36V. All digital inputs have TTL logic­compatible thresholds, ensuring both TTL and CMOS logic compatibility when using a single +12V supply or dual ±15V supplies.
For low-voltage applications requiring fault protection, refer to the MAX4711/MAX4712/MAX4713 data sheet.
Applications
Data-Acquisition Systems
Industrial and Process Control
Avionics
Signal Routing
Redundancy/Backup Systems
ATE Systems
Hot Swap
Features
♦ No Power-Supply Sequencing Required
♦ All Channels Off with Power Off
♦ Rail-to-Rail Signal Handling
♦ 400Ω (max) On-Resistance
♦ ±40V Fault Protection with Power Off
♦ ±25V Fault Protection with ±15V Supplies
♦ 100ns Fault-Response Time
♦ ±4.5V to ±20V Dual Supplies
♦ +9V to +36V Single Supply
♦ TTL/CMOS-Compatible Logic Inputs
MAX4708/MAX4709
Fault-Protected, Single 8-to-1/
Dual 4-to-1 Multiplexers
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
A2
GND
V+
NO1
V-
EN
A0
TOP VIEW
MAX4708
NO5
NO6
NO7
NO8
COM
NO4
NO3
NO2
SO/DIP
LOGIC
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
GND
V+
NO1B
NO1A
V-
EN
A0
MAX4709
NO2B
NO3B
NO4B
COMB
COMA
NO4A
NO3A
NO2A
SO/DIP
LOGIC
Pin Configurations/Functional Diagrams
19-4804; Rev 1; 12/08
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.
PART TEMP RANGE PIN-PACKAGE
MAX4708ESE -40°C to +85°C 16 Narrow SO
MAX4708EWE -40°C to +85°C 16 Wide SO
MAX4708EPE -40°C to +85°C 16 Plastic DIP
MAX4709ESE -40°C to +85°C 16 Narrow SO
MAX4709EWE -40°C to +85°C 16 Wide SO
MAX4709EPE -40°C to +85°C 16 Plastic DIP
Pin Configurations/Functional Diagrams continued at end of data sheet.
MAX4708/MAX4709
Fault-Protected, Single 8-to-1/ Dual 4-to-1 Multiplexers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +15V, V- = -15V, V
A_H
= +2.4V, V
A_L
= +0.8V, VEN= +2.4V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
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.
(All Voltages Referenced to GND)
V+ ........................................................................-0.3V to +44.0V
V- .........................................................................-44.0V to +0.3V
V+ to V-................................................................-0.3V to +44.0V
COM_, A_, EN (Note 1)........................ (V+ + 0.3V) to (V- - 0.3V)
NO_.........................................................(V+ - 40V) to (V- + 40V)
NO_ to COM_ ..........................................................-36V to +36V
NO_ Voltage with Switch Power On ........................-30V to +30V
NO_ Voltage with Switch Power Off ........................-40V to +40V
Continuous Current into any Terminal. .............................±30mA
Peak Current into any Terminal
(pulsed at 1ms, 10% duty cycle)................................±100mA
Continuous Power Dissipation (TA= +70°C)
16 Narrow SO (derate 8.70mW/°C above +70°C) .......696mW
16 Plastic DIP (derate 10.53mW/°C above +70°C) .....842mW
16 Wide SO (derate 9.52mW/°C above +70°C)...........762mW
Operating Temperature Range
MAX4708E_ E/MAX4709E_E ...........................-40°C to +85°C
Junction Temperature..................................................... +150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: COM_, EN, and A_ pins are not fault protected. Signals on COM_, EN, or A_ exceeding V+ or V- are clamped by internal
diodes. Limit forward-diode current to maximum current rating.
PARAMETER
CONDITIONS T
A
UNITS
ANALOG SWITCH
V
NO_
(Notes 3, 4) E V- V+ V
400
On-Resistance R
ON
V
COM_
= ±10V, I
NO_
= 0.2mA
E 500
Ω
15
On-Resistance Match Between Channels
ΔR
ON
V
COM_
= ±10V, I
NO_
= 0.2mA
(Note 5)
E20
Ω
NO_ Off-Leakage Current
)
V
COM_
= ±10V, V
NO_
= ±10V
(Note 6)
E-5 +5
nA
-2 +2
E-20
-1 +1
COM_ Off-Leakage Current
)
V
COM_
= ±10V,
V
NO_
= ±10V
(Note 6)
E-10
nA
-2 +2
E-25
-1 +1
COM_ On-Leakage Current
)
V
COM_
= ±10V,
V
NO_
= ±10V, or
floating (Note 6)
E-15
nA
SYMBOL
MIN TYP MAX
Fault-Free Analog Signal Range
+25°C 300
+25°C
I
NO_(OFF
MAX4708
I
COM_(OFF
I
COM_(ON
MAX4709
MAX4708
MAX4709
+25°C -0.5 +0.5
+25°C
+25°C
+25°C
+25°C
+20
+10
+25
+15
MAX4708/MAX4709
Fault-Protected, Single 8-to-1/
Dual 4-to-1 Multiplexers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
A_H
= +2.4V, V
A_L
= +0.8V, VEN= +2.4V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS T
A
MIN
TYP
MAX
UNITS
FAULT PROTECTION
Power on -25
Fault-Protected Analog Signal Range (Notes 3, 4)
V
NO_
Power off
-40
V
-1 +1
COM_ Output Leakage Current, Supplies On
I
COM_
V
NO_
= ±25, VEN = 0
E-10
µA
-1 +1
NO_ Input Leakage Current, Supplies On
I
NO_
V
NO_
= ±25V, V
COM_
= ±10V,
V
EN
= 0
E-10
µA
-1 +1
NO_ Input Leakage Current, Supplies Off
I
NO_
V
NO_
= ±40V, V
COM
= 0,
V+ = 0, V- = 0
E-10
µA
Fault-Trip Threshold E
V-
V+
V
±Fault Output Turn-Off Delay RL = 10kΩ, V
NO_
= ±25V
ns
±Fault Recovery Time RL = 10kΩ, V
NO_
= ±25V
µs
LOGIC INPUT (VEN, VA_)
Logic Threshold High V
IH
E2.4 V
Logic Threshold Low V
IL
E0.8V
Input Leakage Current I
IN
V
A_
= 0.8V or 2.4V E -1 +1 µA
SWITCH DYNAMIC CHARACTERISTICS
275
Enable Turn-On Time t
ON
V
NO_
= ±10V, RL = 1kΩ,
C
L
= 35pF, Figure 3 (Note 7)
E 400
ns
200
Enable Turn-Off Time t
OFF
V
NO_
= ±10V, RL = 1kΩ,
C
L
= 35pF, Figure 3 (Note 7)
E 250
ns
350
Transition Time t
TRANS
RL = 1kΩ, CL = 35pF, Figure 2 (Note 7)
E 500
ns
1
Settling Time t
SETT
V
NO_
= 5V, RL = 1kΩ,
C
L
= 35pF
E
2.5
µs
Break-Before-Make Time Delay t
BBM
V
NO_
= ±10V, RL = 1kΩ, Figure 4
(Note 4)
E1080 ns
Charge Injection Q
V
NO
_
= 0, RS = 0, CL = 1.0nF,
Figure 5
0pC
Off-Isolation V
ISO
C L = 15p F, Fi g ur e 6 ( N ote 8)
-70 dB
+25°C
+25°C
+25°C
+25°C
+25°C 100
+25°C 1.5
+25°C 160
- 0.4
+25
+40
+10
+10
+10
+ 0.4
f = 1M H z, V
N O_
= 1V
+25°C 120
+25°C 170
0.1%
0.01%
+25°C
, RL = 75Ω ,
RM S
+25°C
MAX4708/MAX4709
Fault-Protected, Single 8-to-1/ Dual 4-to-1 Multiplexers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
A_H
= +2.4V, V
A_L
= +0.8V, VEN= +2.4V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER
CONDITIONS T
A
UNITS
Channel-to-Channel Crosstalk V
CT
C L = 15p F, Fi g ur e 7 ( N ote 9)
-62 dB
NO_ Off-Capacitance
)
f = 1MHz, Figure 8
10 pF
MAX4708 19
COM_ Off-Capacitance
f = 1MHz, Figure 8
MAX4709
14
pF
MAX4708 28
COM_ On-Capacitance
f = 1MHz, Figure 8
MAX4709
22
pF
POWER SUPPLY
Power-Supply Range V+, V- E
V
525
V+ Supply Current I+
All V
A_
= 0 or 5V, V
NO_
= 0,
V
EN
= 5V
E 750
µA
300
V- Supply Current I-
All V
A_
= 0 or 5V, V
NO_
= 0,
V
EN
= 5V
E 400
µA
300
GND Supply Current I
GND
All V
A_
= 0 or 5V, V
NO_
= 0,
V
EN
= 5V
E 500
µA
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0, V
A_H
= +2.4V, V
A_L
= +0.8V, VEN= +2.4V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER
CONDITIONS T
A
ANALOG SWITCH
V
NO_
Power on or off (Note 3) E
V+ V
950
On-Resistance R
ON
V
COM_
= 10V, I
NO_
= 0.2mA
E
Ω
10 35
On-Resistance Match Between Channels
ΔR
ON
V
COM_
= 10V, I
NO_
= 0.2mA
(Note 5)
50
Ω
NO_ Off-Leakage Current
)
(Notes 6, 10)
E-10
nA
-2 +2
E-20
-1 +1
COM_ Off-Leakage Current
)
V
COM_
= 10V, 1V,
V
NO_
= 1V, 10V
(Notes 6, 10)
E-10
nA
SYMBOL
f = 1M H z, V
N O_
= 1V
, RL = 75Ω ,
RM S
+25°C
MIN TYP MAX
C
N_(OFF
C
C OM _( OF F )
C
C OM _( ON )
Fault-Free Analog Signal Range
SYMBOL
V
= 10V, 1V, V
I
NO_(OFF
I
COM_(OFF
COM_
= 1V, 10V
NO_
+25°C
+25°C
+25°C
±4.5 ±20.0
+25°C 370
+25°C 200
+25°C 200
MIN TYP MAX UNITS
-0.3
+25°C 630
+25°C
C, E
+25°C -0.5 0.01 +0.5
+25°C
MAX4708
MAX4709
+25°C
1100
+10
+20
+10
MAX4708/MAX4709
Fault-Protected, Single 8-to-1/
Dual 4-to-1 Multiplexers
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
(V+ = +12V, V- = 0, V
A_H
= +2.4V, V
A_L
= +0.8V, VEN= +2.4V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER
CONDITIONS T
A
-2 +2
E-25
-1 +1
COM_ On-Leakage Current
)
V
COM_
= 10V, 1V;
V
NO_
= 10V, 1V, or
E-15
nA
FAULT PROTECTION
Power on -36
Fault-Protected Analog Signal Range (Notes 3, 10)
V
NO
_
Power off
E
-40
V
-1 +1
COM_ Output Leakage Current, Supplies On
I
COM
_
V
NO_
= ±36V, V+ = 12V
(Notes 3, 10)
E-10
µA
-1 +1
NO_ Input Leakage Current, Supplies On
I
NO
_
V
NO_
= ±36V, V
COM_
= 0,
V+ = 12V (Notes 3, 10)
E-10
µA
-1 +1
NO_ Input Leakage Current, Supply Off
I
NO
_
V
NO_
= ±40V, V+ = 0, V- = 0
(Notes 3, 10)
E-10
µA
LOGIC INPUT (VEN, VA_)
Logic Threshold High V
IH
E2.4 V
Logic Threshold Low V
IL
E0.8V
Input Leakage Current I
IN
VA_ = 0.8V or 2.4V E -1
+1 µA
SWITCH-DYNAMIC CHARACTERISTICS
500
Enable Turn-On Time t
ON
V
COM_
= 10V, RL = 2kΩ,
C
L
= 35pF, Figure 3 (Note 7)
E 700
ns
250
Enable Turn-Off Time t
OFF
V
COM_
= 10V, RL = 2kΩ,
C
L
= 35pF, Figure 3 (Note 7)
E 350
ns
400
Transition Time t
TRANS
RL = 2kΩ, CL = 35pF, Figure 2 (Note 7)
E 600
ns
0.1% 1
Settling Time t
SETT
CL = 35pF
0.01%
E
2.5
µs
Break-Before-Make Time Delay t
BBM
V
COM_
= 10V, RL = 2kΩ, Figure 4
(Note 4)
50
ns
Charge Injection Q
V
NO_
= 0, RS = 0, CL = 1.0 nF,
Figure 5
2pC
NO_ Off-Capacitance
)
f = 1MHz, V
NO_ =
0, Figure 8
5pF
COM_ Off-Capacitance
)
f = 1MHz, V
NO_ =
0, Figure 8
5pF
COM_ On-Capacitance
)
f = 1MHz, V
COM_
= V
NO_ =
0,
Figure 8
28 pF
SYMBOL
MAX4708
I
COM_(ON
floating (Notes 6, 10)
MAX4709
V
= 5V, RL = 1kΩ,
NO_
C
NO_(OFF
C
COM_(OFF
C
COM_(ON
MIN TYP MAX UNITS
+25°C
+25
+25°C
+15
+36
+40
+25°C
+10
+25°C
+10
+25°C
+10
0.03
+25°C 240
+25°C 100
+25°C 180
+25°C
+25°C
+25°C
+25°C
+25°C
100
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