MAX4508C/D [MAXIM]
Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers; 故障保护，高电压单8选1 /双4选1多路复用器
| 型号： | MAX4508C/D |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers |
| 文件： | 总16页 (文件大小：290K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1414; Rev 0; 1/99
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 fault-
protected multiplexers that are pin-compatible with the
ind us try-s ta nd a rd DG508/DG509. The MAX4508/
MAX4509 operate with dual supplies of ±4.5V to ±20V or
a single supply of +9V to +36V. These multiplexers fea-
ture fault-protected inputs, Rail-to-Rail signal handling
capability, and overvoltage clamping at 150mV beyond
the rails.
♦ ±40V Fault Protection with Power Off
±25V Fault Protection with ±15V Supplies
♦ Rail-to-Rail Signal Handling
♦ No Power-Supply Sequencing Required
♦ All Channels Off with Power Off
♦ Output Clamped to Appropriate Supply Voltage
®
During Fault Condition
♦ 1kΩ Output Clamp Resistance During
Both parts offer ±40V overvoltage protection with sup-
plies off and ±25V protection with supplies on. On-
re s is ta nc e is 400Ω ma x a nd is ma tc he d b e twe e n
channels to 15Ωmax. All digital inputs have TTL logic
thresholds, ensuring both TTL and CMOS logic com-
patibility when using a single +12V supply or dual ±15V
supplies.
Overvoltage
♦ 400Ωmax On-Resistance
♦ 20ns Fault-Response Time
♦ ±4.5V to ±20V Dual Supplies
+9V to +36V Single Supply
♦ TTL/CMOS-Compatible Logic Inputs
Ap p lic a t io n s
Ord e rin g In fo rm a t io n
Data-Acquisition Systems
Industrial and Process Control
Avionics
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
16 SSOP
MAX4508CAE
MAX4508CSE
MAX4508CPE
MAX4508C/D
MAX4508EAE
MAX4508ESE
MAX4508EPE
MAX4508MJE
0°C to +70°C
16 Narrow SO
16 Plastic DIP
Dice*
Signal Routing
0°C to +70°C
Redundant/Backup Systems
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
16 SSOP
16 Narrow SO
16 Plastic DIP
16 CERDIP**
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
**Contact factory for availability.
Functional Diagrams/Truth Tables appear at end of
data sheet.
P in Co n fig u ra t io n s /Fu n c t io n a l Dia g ra m s
TOP VIEW
MAX4508
LOGIC
MAX4509
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
A0
16 A1
15 A2
A0
16 A1
15 GND
EN
V-
EN
V-
LOGIC
GND
V+
14
14
13 NO1B
12
NO1
NO2
NO3
NO4
COM
NO1A
NO2A
NO3A
NO4A
COMA
13 V+
12
NO5
NO2B
11 NO3B
11 NO6
NO7
NO8
NO4B
10
9
10
9
COMB
SSOP/SO/DIP
SSOP/SO/DIP
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
1
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.
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
Continuous Power Dissipation (T = +70°C)
A
V+ ........................................................................-0.3V to +44.0V
V- .........................................................................-44.0V to +0.3V
V+ to V-................................................................-0.3V to +44.0V
COM_, A_ (Note 1) .............................. (V+ + 0.3V) to (V- - 0.3V)
NO_.........................................................(V+ - 40V) to (V- + 40V)
NO_ to COM_ ..........................................................-36V to +36V
NO_ Overvoltage with Switch Power On. ................-30V to +30V
NO_ Overvoltage with Switch Power Off. ................-40V to +40V
Continuous Current into Any Terminal..............................±30mA
Peak Current, Into Any Terminal
16 SSOP (derate 8.70mW/°C above +70°C) ................667mW
16 Narrow SO (derate 8.70mW/°C above +70°C) ........471mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C) 842mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW
Operating Temperature Ranges
MAX4508C_ E/MAX4509C_E...............................0°C to +70°C
MAX4508E_ E/MAX4509E_E ............................-40°C to +85°C
MAX4508MJE/MAX4509MJE..........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
(pulsed at 1ms, 10% duty cycle).................................±100mA
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.
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.
8/MAX4509
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +15V, V- = -15V, V
=+2.4V, V
= +0.8V, V = +2.4V, T = T
to T , unless otherwise noted. Typical values are at
MAX
A_
A_
L
EN
A
MIN
H
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
ANALOG SWITCH
Fault-Free Analog Signal Range
(Notes 3, 4)
V+ = +15V, V- = -15V,
V
NO_
C, E, M
V-
V+
V
V
= ±15V
NO_
+25°C
C, E
M
300
400
500
700
15
20
25
0.5
5
On-Resistance
R
V
= ±10V, I
= 0.2mA
= 0.2mA
Ω
ON
COM_
NO_
+25°C
C, E
M
On-Resistance Match Between
Channels (Note 5)
∆R
V
COM_
= ±10V, I
= ±10V, V
Ω
ON
NO_
+25°C
C, E
M
-0.5
-5
NO_ Off-Leakage Current
(Note 6)
–
I
V
NO_
= +10V
nA
NO_(OFF)
COM_
-50
-2
50
2
+25°C
C, E
M
MAX4508
MAX4509
MAX4508
MAX4509
-20
-200
-1
20
200
1
COM_ Off-Leakage Current
(Note 6)
V
COM_
= ±10V,
I
nA
COM_(OFF)
–
V
NO_
= +10V,
+25°C
C, E
M
-10
-100
-2
10
100
2
+25°C
C, E
M
-25
-300
-1
25
300
1
V
COM_
= ±10V,
= ±10V or
COM_ On-Leakage Current
(Note 6)
I
V
nA
COM_(ON)
NO_
+25°C
C, E
M
floating
-15
-150
15
150
2
_______________________________________________________________________________________
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
= +2.4V, V
= +0.8V, V = +2.4V, T = T
to T , unless otherwise noted. Typical values are at
MAX
A_
A_
L
EN
A
MIN
H
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
FAULT PROTECTION
Applies with power on, Figure 9
Applies with power off
-25
-40
-10
-20
-100
-20
-200
-50
-20
-5
25
40
10
20
100
20
200
50
20
5
Fault-Protected Analog Signal
Range (Notes 3, 4)
V
+25°C
V
NO_
+25°C
C, E
M
nA
µA
nA
COM_ Output Leakage Current,
Supplies On
I
V
= ±25V, V = 0
COM_
NO_ EN
+25°C
C, E
M
–
= +10V,
COM_
NO_ Input Leakage Current,
Supplies On
V
V
EN
= ±25V, V
= 0
NO_
I
NO_
µA
nA
+25°C
C, E
M
NO_ Input Leakage Current,
Supplies Off
V
NO_
= ±40V, V
= 0,
COM
I
NO_
V+ = 0, V- = 0
µA
mA
kΩ
-100
7
100
13
-7
V
= 25V
10
NO_
COM_ On Clamp Output
Current, Supplies On
I
V
COM
= 0
+25°C
+25°C
COM_
V
NO_
= -25V
-13
-11
COM_ On Clamp Output
Resistance, Supplies On
R
V
NO_
= ±25V
100
1.0
2.5
COM_
± Fault Output Clamp Turn-On
Delay (Note 4)
R
R
= 10kΩ, V
= ±25V
= ±25V
+25°C
+25°C
20
ns
µs
L
L
NO_
± Fault Recovery Time (Note 4)
LOGIC INPUT
= 10kΩ, V
2.5
NO_
A_ Input Logic Threshold High
A_ Input Logic Threshold Low
V
C, E, M
C, E, M
2.4
-1
V
V
A_H
V
A_L
0.8
1
A_ Input Current Logic
High or Low
I
, I
V = 0.8V or 2.4V
A_
C, E, M
µA
A_H A_L
SWITCH DYNAMIC CHARACTERISTICS
+25°C
C, E
160
275
400
600
350
500
200
250
400
V
= ±10V, R = 1kΩ,
L
NO_
Enable Turn-On Time
Transition Time
t
ns
ns
ns
ON
Figures 2 and 3
M
+25°C
C, E, M
+25°C
C, E
170
120
t
Figure 2
TRANS
V
= ±10V, R = 1kΩ,
L
NO_
Enable Turn-Off Time
t
OFF
Figures 2 and 3
V = ±10V, R = 1kΩ,
NO_
M
Break-Before-Make Time Delay
(Note 4)
L
t
C, E, M
+25°C
+25°C
10
80
2
ns
BBM
Q
Figure 4
Charge Injection
(Note 4)
C
= 1.0nF, V = 0, R = 0,
NO_ S
L
10
pC
dB
Figure 5
R = 75Ω, C = 15pF,
L
Off-Isolation
(Note 7)
L
V
-70
ISO
V
NO_
= 1V
, f = 1MHz, Figure 6
RMS
_______________________________________________________________________________________
3
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, V
= +2.4V, V
= +0.8V, V = +2.4V, T = T
to T , unless otherwise noted. Typical values are at
MAX
A_
A_
L
EN
A
MIN
H
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
R = 75Ω, C = 15pF,
L
T
MIN
TYP
MAX
UNITS
dB
A
Channel-to-Channel Crosstalk
(Note 8)
L
+25° C
+25° C
+25° C
V
CT
-62
V
NO_
= 1V
, f = 1MHz, Figure 7
RMS
NO_ Off-Capacitance
COM_ Off-Capacitance
C
f = 1MHz, Figure 8
f = 1MHz, Figure 8
10
19
14
28
22
pF
N_(OFF)
MAX4508
MAX4509
MAX4508
MAX4509
C
pF
COM_(OFF)
+25° C
COM_ On-Capacitance
C
f = 1MHz, Figure 8
pF
COM_(ON)
POWER SUPPLY
Power-Supply Range
V+, V-
I+
C, E, M
+25°C
C, E
±4.5
±20
500
600
800
300
400
500
300
500
V
370
200
200
All V = 0 or 5V,
A_
V+ Supply Current
µA
V
NO_
= 0, V = 5V
EN
8/MAX4509
M
+25°C
C, E
All V = 0 or 5V,
A_
V- Supply Current
I-
µA
µA
V
NO_
= 0, V = 5V
EN
M
+25°C
C, E, M
All V = 0 or 5V,
A_
GND Supply Current
I
GND
V
NO_
= 0, V = 5V
EN
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0, V
= +2.4V, V
= +0.8V, V = +2.4V, T = T
to T
, unless otherwise noted. Typical values are at
A_
A_
L
EN
A
MIN
MAX
H
T
A
= +25°C.) (Note 2)
PARAMETER
ANALOG SWITCH
SYMBOL
CONDITIONS
T
MIN
TYP
MAX
UNITS
A
Fault-Free Analog Signal Range
(Note 3)
V+ = 12V, V- = 0,
= 12V
V
NO_
C, E, M
0
V+
V
V
NO_
+25°C
C, E
M
650
10
950
1100
1300
25
On-Resistance
R
V
= +10V, I = 200µA
NO_
Ω
ON
COM_
+25°C
C, E
M
On-Resistance Match Between
Channels (Note 5)
∆R
V
COM_
= 10V, I = 200µA
NO_
50
Ω
ON
75
+25°C
C, E
M
-0.5
-10
0.01
0.5
NO_ Off-Leakage Current
(Notes 6, 9)
V
V
NO_
= 10V, 1V;
= 1V, 10V
COM_
I
nA
10
NO_(OFF)
-200
200
4
_______________________________________________________________________________________
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
(V+ = +12V, V- = 0, V
= +2.4V, V
= +0.8V, V = +2.4V, T = T
to T , unless otherwise noted. Typical values are at
MAX
A_
H
A_
L
EN
A
MIN
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
T
MIN
-2
TYP
MAX
2
UNITS
A
+25°C
C, E
M
MAX4508
MAX4509
MAX4508
MAX4509
-20
-200
-1
20
200
1
COM_ Off-Leakage Current
(Note 6)
V
V
NO_
= 10V, 1V;
= 1V, 10V
COM_
I
nA
COM_(OFF)
+25°C
C, E
M
-10
-100
-2
10
100
2
+25°C
C, E
M
-25
-300
-1
25
300
1
V
COM_
= 10V, 1V;
= 10V, 1V, or
COM_ On-Leakage Current
(Note 6)
I
V
nA
COM_(ON)
NO_
+25°C
C, E
M
floating
-15
-150
15
150
FAULT PROTECTION
Applies with all power on
Applies with all power off
-25
-40
-20
-20
-100
-20
-5
25
40
20
20
100
20
5
Fault-Protected Analog Signal
Range (Notes 3, 10)
V
+25°C
V
NO_
+25°C
C, E
M
nA
µA
nA
µA
nA
COM_ Output Leakage Current,
Supply On (Notes 3, 10)
I
V
NO_
= ±25V, V+ = 12V
COM_
+25°C
C, E
M
NO_ Input Leakage Current,
Supply On (Notes 3, 10)
V
NO_
= ±25V, V
= 0,
COM_
I
NO_
V+ = 12V
-100
-20
-5
100
20
5
+25°C
C, E
M
0.1
NO_ Input Leakage Current,
Supply Off (Notes 3, 10)
I
V
NO_
= ±40V, V+ = 0, V- = 0
NO_
µA
-100
100
COM_ ON Output Current,
Supply On
I
V
= 25V, V+ = 12V
= 25V, V+ = 12V
NO_
+25°C
+25°C
2
3
5
6
mA
COM_
NO_
COM_ ON Output Resistance,
Supply On
R
V
2.4
kΩ
COM_
LOGIC INPUT
A_ Input Logic Threshold High
A_ Input Logic Threshold Low
V
C, E, M
C, E, M
1.8
1.8
2.4
1
V
V
IN_H
V
IN_L
0.8
-1
A_ Input Current Logic
High or Low
I
,
INH_
V
IN_
= 0.8V or 2.4V
C, E, M
0.03
µA
I
INL_
_______________________________________________________________________________________
5
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
(V+ = +12V, V- = 0, V
= +2.4V, V
= +0.8V, V = +2.4V, T = T
to T , unless otherwise noted. Typical values are at
MAX
A_
H
A_
L
EN
A
MIN
T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
T
MIN
TYP
220
100
MAX
UNITS
A
SWITCH DYNAMIC CHARACTERISTICS
+25°C
C, E, M
+25°C
500
700
250
350
V
= 10V, R = 2kΩ,
L
COM_
Enable Turn-On Time
Enable Turn-Off Time
t
ns
ns
ON
Figure 3
V
COM_
= 10V, R = 2kΩ,
L
t
OFF
Figure 3
V = 10V, R = 2kΩ,
COM_
C, E, M
Break-Before-Make Time Delay
(Note 4)
L
t
+25°C
+25°C
50
100
2
ns
BBM
Q
Figure 4
Charge Injection
(Note 4)
C
= 1.0nF, V = 0, R = 0,
NO_ S
L
10
pC
Figure 5
NO_ Off-Capacitance
COM_ Off-Capacitance
C
V
= 0, f = 1MHz, Figure 8
+25°C
+25°C
10
19
pF
pF
NO_(OFF)
NO_
C
V
COM_
= 0, f = 1MHz, Figure 8
COM_(OFF)
8/MAX4509
V
= V
= 0, f = 1MHz,
COM_
NO_
COM_ On-Capacitance
C
+25°C
+25°C
+25°C
28
-70
-62
pF
dB
dB
COM_(ON)
Figure 8
R = 75Ω, C = 15pF,
L
Off-Isolation
(Note 7)
L
V
ISO
V
NO_
= 1V
f = 1MHz, Figure 6
RMS,
Channel-to-Channel Crosstalk
(Note 8)
R = 75Ω, C = 15pF,
L L
V
NO_
V
CT
= 1V
f = 1MHz, Figure 7
RMS,
POWER SUPPLY
Power-Supply Range
V+
I+
C, E, M
+25°C
9
36
V
200
150
250
300
450
250
375
400
600
All V = 0 or 5V,
A_
V+ Supply Current
µA
V
NO_
= 0, V = 5V
EN
C, E, M
+25°C
All V = 0 or 5V,
A_
V
NO_
= 0, V = +5V
EN
C, E, M
+25°C
V- and GND Supply Current
I
µA
GND
All V = 0 or 5V
A_
C, E, M
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: NO_ pins are fault protected and COM_ pins are not fault protected. The max input voltage on NO_ pins depends on the
COM_ load configuration. Generally the max input voltage is ±36V with ±15V supplies and a load referred to ground. For
more detailed information refer to NO_ Input Voltage section.
Note 4: Guaranteed by design.
Note 5: ∆R
= R
- R
.
ON(MIN)
ON
ON(MAX)
Note 6: Leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at T = +25°C.
A
Note 7: Off-isolation = 20log1 (V
/ V
NO_
), where V
= output and V
= input to off switch.
0
COM_
COM_
NO_
Note 8: Between any two analog inputs.
Note 9: Leakage testing for single-supply operation is guaranteed by testing with dual supplies.
Note 10: Guaranteed by testing with dual supplies.
6
_______________________________________________________________________________________
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V+ = +15V, V- = -15V, V = +2.4V, T = +25°C, unless otherwise noted.)
EN
A
ON-RESISTANCE vs.
ON-RESISTANCE vs. V
TEMPERATURE (DUAL SUPPLIES)
AND
ON-RESISTANCE vs.
(SINGLE SUPPLY)
COM
V
(DUAL SUPPLIES)
V
COM
COM
1000
900
800
700
600
500
400
300
200
100
0
1100
1000
900
800
700
600
500
400
300
200
100
0
600
500
400
300
200
100
0
V+ = +15V
V- = -15V
V+ = +9V
V+ = +4.5V
V- = -4.5V
+125°C
+85°C
V+ = +12V
V+ = +15V
V+ = +10V
V- = -10V
V+ = +15V
V- = -15V
V+ = +20V
V+ = +30V
+70°C
+25°C
-40°C
-55°C
V+ = +20V
V- = -20V
V+ = +36V
-20 -15 -10 -5
0
5
10 15 20
-15
-15
-55
-10
-5
0
5
10
15
0
5
10 15 20 25 30 35 40
(V)
V
COM
(V)
V
COM
(V)
V
COM
ON-RESISTANCE vs. V
TEMPERATURE (SINGLE SUPPLY)
AND
COM
LEAKAGE CURRENT vs. TEMPERATURE
CHARGE INJECTION vs. V
COM
1000
900
800
700
600
500
400
300
200
100
0
1µ
100n
10n
1n
2.5
2.0
1.5
1.0
0.5
0
V+ = +12V
V+ = +15V
V+ = +15V
V- = -15V
V- = 0
+125°C
+85°C
+25°C
V- = -15V
±
V
V
NO
= 10V
= ±10V
COM
+70°C
-40°C
DUAL
SUPPLIES
I
COM_OFF
I
COM_ON
100p
10p
1p
-55°C
I
NO_OFF
SINGLE
SUPPLY
0.1p
0
2
4
6
8
10
12
14
-55 -30 -5 20 45 70 95 120 145
TEMPERATURE (°C)
-10
-5
0
5
10
15
V
COM
(V)
V
(V)
COM
ENABLE ON AND OFF TIMES
vs. TEMPERATURE
ENABLE ON AND OFF TIMES vs.
SUPPLY VOLTAGE (DUAL SUPPLIES)
ENABLE ON AND OFF TIMES vs.
SUPPLY VOLTAGE (SINGLE SUPPLY)
300
250
200
150
100
50
800
700
600
500
400
300
200
100
0
350
300
250
200
150
100
50
V+ = +15V
V- = -15V
V
NO_
= +10V
V
NO_
= ±10V
t
ON
t
ON
t
ON
t
OFF
t
OFF
t
OFF
0
0
-25
5
35
65
95
125
0
±2 ±4 ±6 ±8 ±10 ±12 ±14 ±16 ±18 ±20
SUPPLY VOLTAGE (V)
0
5
10
15
20
25
30
35
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
7
Guaranteed by Design
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V+ = +15V, V- = -15V, V = +2.4V, T = +25°C, unless otherwise noted.)
EN
A
POWER-SUPPLY CURRENT
vs. TEMPERATURE (V = 0)
POWER-SUPPLY CURRENT
vs. TEMPERATURE (V = +5V)
A
A
300
200
100
0
600
400
200
0
V+ = +15V
V- = -15V
V = 0
A
V+ = +15V
V- = -15V
V = +5V
A
I+
I+
I
GND
I
GND
-100
-200
-300
-200
-400
-600
I-
I-
-55 -30 -5 20 45 70 95 120 145
TEMPERATURE (°C)
-60 -40 -20
0
20 40 60 80 100 120 140
8/MAX4509
TEMPERATURE (°C)
LOGIC-LEVEL THRESHOLD
vs. SUPPLY VOLTAGE
FREQUENCY RESPONSE
20
0
3.0
2.5
2.0
1.5
1.0
0.5
0
V+ = +15V
V- = -15V
V- = GND
BANDWIDTH
DUAL
SUPPLIES
SINGLE
-20
-40
SUPPLY
CROSSTALK
-60
-80
OFF-ISOLATION
-100
0.001 0.01
0.1
1
10
100 1000
0
5
10 15 20 25 30 35 40
SUPPLY VOLTAGE (V)
FREQUENCY (MHz)
FAULT-FREE SIGNAL PERFORMANCE
INPUT OVERVOLTAGE vs. OUTPUT CLAMPING
+25V
+15V
IN_
0V
IN_
10V/div
-15V
0V
+15V
+15V
COM_
0V
-25V
0V
0V
10V/div
-15V
COM_
-15V
5µs/div
5µs/div
±25V OVERVOLTAGE INPUT WITH THE OUTPUT
CLAMPED AT ±15V
FAULT-FREE RAIL-TO-RAIL SIGNAL HANDLING
WITH ±15V SUPPLIES
8
_______________________________________________________________________________________
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
P in De s c rip t io n s
MAX4508 (Single 8-to-1 Mux)
MAX4509 (Dual 4-to-1 Mux)
PIN
NAME
FUNCTION
PIN
NAME
FUNCTION
1
2
A0
EN
Address Bit 0
Mux Enable
1
2
A0
Address Bit 0
Mux Enable
EN
3
V-
Negative Supply Voltage
Channel Input 1
Channel Input 2
Channel Input 3
Channel Input 4
Analog Output
Channel Input 8
Channel Input 7
Channel Input 6
Channel Input 5
Positive Supply Voltage
Ground
3
V-
Negative Supply Voltage
Channel Input 1A
Channel Input 2A
Channel Input 3A
Channel Input 4A
Mux Output A
4
NO1
NO2
NO3
NO4
COM
NO8
NO7
NO6
NO5
V+
4
NO1A
NO2A
NO3A
NO4A
COMA
COMB
NO4B
NO3B
NO2B
NO1B
V+
5
5
6
6
7
7
8
8
9
9
Mux Output B
10
11
12
13
14
15
16
10
11
12
13
14
15
16
Channel Input 4B
Channel Input 3B
Channel Input 2B
Channel Input 1B
Positive Supply Voltage
Ground
GND
A2
Address Bit 2
GND
A1
A1
Address Bit 1
Address Bit 1
Tru t h Ta b le s
MAX4508 (Single 8-to-1 Mux)
De t a ile d De s c rip t io n
Traditional fault-protected multiplexers are constructed
with three series FET switches. This produces good off
protection, but limits the switches input voltage range
to as much as 3V below the supply rails, reducing its
usable dynamic range. As the voltage on one side of
the switch approaches within about 3V of either supply
rail (a fault condition), the switch impedance increases,
limiting the output signal range to approximately 3V
less than the appropriate polarity supply voltage.
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
NO1
NO2
NO3
NO4
NO5
NO6
NO7
NO8
The MAX4508/MAX4509 differ considerably from tradi-
tiona l fa ult-p rote c te d multip le xe rs , offe ring s e ve ra l
advantages. First, they are constructed with two paral-
lel FETs, allowing very low resistance when the switch
is on. Second, they allow signals on the NO_ pins that
are within or beyond the supply rails to be passed
through the switch to the COM terminal. This allows rail-
MAX4509 (Dual 4-to-1 Mux)
A1
A0
EN
COMA
COMB
to-ra il s ig na l op e ra tion. Third , whe n a s ig na l V
NO_
exceeds the supply rails (i.e., a fault condition), the
volta g e on COM_ is limite d to the s up p ly ra ils .
Operation is identical for both fault polarities.
x
0
0
1
1
x
0
1
0
1
0
1
1
1
1
None
None
NO1B
NO2B
NO3B
NO4B
NO1A
NO2A
NO3A
NO4A
_______________________________________________________________________________________
9
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
NORMALLY OPEN SWITCH CONSTRUCTION
V+
MAX4508
MAX4509
P2
HIGH
FAULT
P1
NO_
COM_
N1
LOW
FAULT
ON
A-
8/MAX4509
GWD
N2
V-
ESO CODE
Figure 1. Functional Diagram
When the NO_ voltage goes beyond supply rails (fault
condition), the NO_ input becomes high impedance
regardless of the switch state or load resistance. When
power is removed, and the fault protection is still in
effect, the NO_ terminals are a virtual open circuit. The
fault can be up to ±40V, with V+ = V- = 0. If the switch
is on, the COM_ output current is furnished from the V+
or V- pin by “booster” FETs connected to each supply
pin. These FETs can source or sink up to 10mA.
ously, according to the input fault condition and the
logic level state.
NO_ In p u t Vo lt a g e
The maximum allowable input voltage for safe opera-
tion depends on whether supplies are on or off and the
load configuration at the COM output. If COM is re-
ferred to a voltage other than ground, but within the
supplies, V
may range higher or lower than the sup-
NO_
plies provided the absolute value of V
- V
is
NO_
COM_
The COM_ pins are not fault protected. If a voltage
source is connected to any COM_ pin, it should be lim-
ited to the supply voltages. Exceeding the supply volt-
age will cause high currents to flow through the ESD
protection diodes, damaging the device (see Absolute
Maximum Ratings).
less than 40V. For example, if the load is referred to
+10V at COM_, then the NO_ voltage range can be
from +50V to -30V. As another example, if the load is
connected to -10V at COM_, the NO_ voltage range is
limited to -50V to +30V.
If the supplies are ±15V and COM is referenced to
ground through a load, the maximum NO_ voltage is
±25V. If the supplies are off and the COM output is ref-
erenced to ground, the maximum NO_ voltage is ±40V.
Figure 1 shows the internal construction, with the ana-
log signal paths shown in bold. A single normally open
(NO) switch is shown. The analog switch is formed by
the parallel combination of N-channel FET N1 and P-
channel FET P1 which are driven on and off simultane-
10 ______________________________________________________________________________________
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
The GND, COM_, and A_ pins do not have fault protec-
tion. Reverse ESD protection diodes are internally con-
nected between GND, COM_, A_, and both V+ and V-.
If a signal on GND, COM_, or A_ exceeds V+ or V- by
more than 300mV, one of these diodes will conduct.
During normal operation, these reverse-biased ESD
diodes leak a few nanoamps of current to V+ and V-
No rm a l Op e ra t io n
Two comparators continuously compare the voltage on
the NO_ pin with V+ and V- supply voltages. When the
signal on NO_ is between V+ and V-, the multiplexer
behaves normally, with FETs N1 and P1 turning on and
off in response to A_ signals (Figure 1). The parallel
combination of N1 and P1 forms a low-value resistor
between NO_ and COM_ so that signals pass equally
well in either direction.
Fa u lt P ro t e c t io n Vo lt a g e a n d P o w e r Off
The maximum fault voltage on the NO_ pins is ±40V
from ground when the power is off. With ±15V supply
voltages, the highest voltage on NO_ can be V- + 40V,
a nd the lowe s t volta g e on NO c a n b e V+ - 40V.
Exceeding these limits can damage the chip.
P o s it ive Fa u lt Co n d it io n
When the signal on NO_ exceeds V+ by about 150mV,
the positive fault comparator output goes high, turning
off FETs N1 and P1 (Figure 1). This makes the NO_ pin
high impedance, regardless of the switch state. If the
switch state is “off,” all FETs turn off, and both NO_ and
COM_ are high impedance. If the switch state is “on,”
FET P2 turns on, clamping COM_ to V+.
Lo g ic Le ve l Th re s h o ld s
The logic level thresholds are CMOS and TTL compati-
ble with V+ = 13.5V to V+ = 16.5V.
Ap p lic a t io n s In fo rm a t io n
Ne g a t ive Fa u lt Co n d it io n
When the signal on NO_ goes about 150mV below V-,
the negative fault comparator output goes high, turning
off FETs N1 and P1 (Figure 1). This makes the NO_ pin
high impedance, regardless of the switch state. If the
switch state is “off,” all FETs turn off, and both NO_ and
COM_ are high impedance. If the switch state is “on,”
FET N2 turns on, clamping COM_ to V-.
Gro u n d
The re is no c onne c tion b e twe e n the a na log s ig na l
paths and GND. The analog signal paths consist of an
N-channel and a P-channel MOSFET with their sources
and drains paralleled and their gates driven out of
phase to V+ and V- by the logic-level translators.
V+ and GND power the internal logic and logic level
translators and set the input logic thresholds. The logic-
level translators convert the logic levels to switched V+
and V- signals to drive the gates of the multiplexers.
This drive signal is the only connection between the
power supplies and the analog signals. GND, A_, and
COM_ have ESD protection diodes to V+ and V-.
Tra n s ie n t Fa u lt Co n d it io n
When a fast rising or falling transient on NO_ exceeds
V+ or V-, the output (COM_) follows the input (NO_) to
the supply rail with only a few nanoseconds delay. This
delay is due to the switch on-resistance and circuit
c a p a c ita nc e to g round . Whe n the inp ut tra ns ie nt
returns to within the supply rails, however, there is a
longer output recovery time. For positive faults, the
recovery time is typically 2.5µs (see Typical Operating
Characteristics). For negative faults, the recovery time
is typically 1.3µs. These values depend on the COM_
output resistance and capacitance. The delays do not
depend on the fault amplitude. Higher COM_ output
re s is ta nc e a nd c a p a c ita nc e inc re a s e the re c ove ry
times.
S u p p ly Cu rre n t Re d u c t io n
When the logic signals are driven rail-to-rail from 0 to
+15V or -15V to +15V, the current consumption will be
reduced from 370µA (typ) to 200µA.
P o w e r S u p p lie s
The MAX4508/MAX4509 operate with bipolar supplies
between ±4.5V and ±20V. The V+ and V- supplies
need not be symmetrical, but their sum cannot exceed
the 44V absolute maximum rating.
COM a n d A_
FETs N2 and P2 can source about ±10mA from V+ or
V- to the COM_ pin in the fault condition (Figure 1).
Ensure that if the COM_ pin is connected to a low-
impedance load, the absolute maximum current rating
of 30mA is never exceeded, either in normal or fault
conditions.
The MAX4508/MAX4509 operate from single supplies
between +9V and +36V when V- is connected to GND.
______________________________________________________________________________________ 11
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
Te s t Circ u it s /Tim in g Dia g ra m s
+15V
V+
NO1
A2
A1
A0
+10V
-10V
NO2–NO7
MAX4508
NO8
t < 20ns
R
+2.4V
LOGIC
INPUT
V
A_
+3V
0V
EN
COM
t < 20ns
V
F
OUT
50%
GND
V-
35pF
50Ω
1k
-15V
V
NO1
90%
+15V
V+
SWITCH
OUTPUT
V
OUT
0V
NO1B
A1
A0
+10V
-10V
90%
V
NO8
NO1A–NO4A
NO4B
MAX4509
t
5
t
TRANS
TRANS
ON
+2.4V
EN
COMB
V-
V
OUT
GND
35pF
50Ω
300Ω
-15V
Figure 2. Address Transition Time
+15V
V+
V
EN
EN
NO1
NO2–NO8
+10V
A0
A1
A2
MAX4508
t < 20ns
R
COM
V
OUT
+3V
0V
t < 20ns
LOGIC
INPUT
V
EN
F
GND
V-
50%
50Ω
35pF
1k
t
t
OFF(EN)
ON(EN)
-15V
0V
+15V
V+
90%
SWITCH
OUTPUT
V
OUT
V
EN
EN
NO1B
+10V
NO1A–NO4A
NO2B–NO4B,
COMA
10%
A0
A1
MAX4509
COMB
V-
V
OUT
GND
50Ω
35pF
1k
-15V
Figure 3. Enable Switching Time
12 ______________________________________________________________________________________
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
+15V
V+
V
EN
t
< 20ns
R
+2.4V
EN
A0
+3V
0V
t < 20ns
LOGIC
INPUT
V
A
F
50%
NO1–NO8
+10V
MAX4508
+5V
A1
A2
80%
V
A
SWITCH
OUTPUT
V
OUT
COM
V
OUT
GND
V-
35pF
t
OPEN
0V
1k
50Ω
-15V
Figure 4. MAX4508 Break-Before-Make Interval
+15V
R
S
NO
EN
V+
+3V
0V
V
EN
LOGIC
INPUT
V
EN
OFF
ON
OFF
V
S
MAX4508
A0
A1
A2
COM
CHANNEL
SELECT
V
OUT
∆V
OUT
C
L
V
OUT
1000nF
GND
V-
∆V IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
OUT
ERROR V WHEN THE CHANNEL TURNS OFF.
CTE
-15V
V
CTE
= ∆V
C
OUT L
Figure 5. Charge Injection
10nF
+15V
V+
+15V
10nF
NO1
NO2
NO1
V+
V
IN
V
IN
R = 50Ω
S
NO8
R
1kΩ
NO8
MAX4508
MAX4508
COM
V-
V
A0
A1
A2
OUT
COM
V
A0
A1
A2
OUT
R = 50Ω
G
R
L
R
L
75Ω
GND
EN
75Ω
EN
GND
V-
10nF
10nF
-15V
-15V
V
OUT
V
CROSSTALK = 20log
OUT
OFF-ISOLATION = 20log
V
IN
V
IN
Figure 6. Off-Isolation
Figure 7. Crosstalk
______________________________________________________________________________________ 13
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
+15V
V+
+25V
V
_
V
COM_
NO
A2
A1
A0
NO1
NO8
+15V
1MHz
CAPACITANCE
ANALYZER
CHANNEL
SELECT
MAX4508
-15V
-25V
COM
GND EN
V-
f = 1MHz
-15V
Figure 8. NO_, COM_ Capacitance
Figure 9. Transient Behavior of Fault Condition
Fu n c t io n a l Dia g ra m s /Tru t h Ta b le s
8/MAX4509
V+
V-
GND
MAX4508
MAX4508
NO1
NO2
NO3
NO4
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
COM
NO5
NO6
NO7
NO8
DECODERS / DRIVERS
A0
V+
A1
A2
EN
LOGIC "O" V ≤ +0.8V, LOGIC "1" V ≥ +2.4V
AL
AH
V-
GND
MAX4509
NO1A
NO2A
NO3A
NO4A
COMA
COMB
MAX4509
A1
A0
EN ON SWITCH
X
0
0
1
1
X
0
1
0
1
0
1
1
1
1
NONE
NO1B
NO2B
NO3B
NO4B
1
2
3
4
DECODERS / DRIVERS
A1
LOGIC "O" V ≤ +0.8V, LOGIC "1" V ≥ +2.4V
AL
AH
A0
EN
14 ______________________________________________________________________________________
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
8/MAX4509
Ord e rin g In fo rm a t io n (c o n t in u e d )
___________________Ch ip To p o g ra p h y
EN A0
A1 A2
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
16 SSOP
MAX4509CAE
MAX4509CSE
MAX4509CPE
MAX4509C/D
MAX4509EAE
MAX4509ESE
MAX4509EPE
MAX4509MJE
V-
GND
V+
0°C to +70°C
16 Narrow SO
16 Plastic DIP
Dice*
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
16 SSOP
16 Narrow SO
16 Plastic DIP
16 CERDIP**
N05
N01
N02
0.198"
(5.03mm)
*Contact factory for dice specifications.
**Contact factory for availability.
N06
N03
N.C.
N04
COM
N08 N07
0.086"
(2.18mm)
TRANSISTOR COUNT: 543
SUBSTRATE IS INTERNALLY CONNECTED TO V+.
______________________________________________________________________________________ 15
Fa u lt -P ro t e c t e d , Hig h -Vo lt a g e
S in g le 8 -t o -1 /Du a l 4 -t o -1 Mu lt ip le x e rs
P a c k a g e In fo rm a t io n
8/MAX4509
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.
16 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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