MAX4512CSE [MAXIM]
Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches; 四，轨到轨，故障保护， SPST模拟开关
| 型号： | MAX4512CSE |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Quad, Rail-to-Rail, Fault-Protected, SPST Analog Switches |
| 文件： | 总16页 (文件大小：312K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4760; Rev 0; 6/98
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX4511/MAX4512/MAX4513 are quad, single-
pole/single-throw (SPST), fault-protected analog switch-
es. They are pin-compatible with the industry-standard
nonprotected DG201/DG202/DG213. These new switch-
♦ ±40V Fault Protection with Power Off
±36V Fault Protection with ±15V Supplies
♦ All Switches Off with Power Off
♦ Rail-to-Rail Signal Handling
®
es feature fault-protected inputs and Rail-to-Rail signal
ha nd ling c a p a b ility. The norma lly op e n (NO_) a nd
normally closed (NC_) terminals are protected from
ove rvolta g e fa ults up to 36V d uring p owe r-up or
power-down. During a fault condition, the NO_ or NC_
terminal becomes an open circuit and only nanoamperes
of leakage current flow from the source, but the switch
output (COM_) furnishes up to 10mA of the appropriate
polarity supply voltage to the load. This ensures unam-
biguous rail-to-rail outputs when a fault begins and ends.
♦ Output Clamped to Appropriate Supply Voltage
1
/MAX451
During Fault Condition; No Transition Glitch
♦ 175Ω max Signal Paths with ±15V Supplies
♦ No Power-Supply Sequencing Required
♦ ±4.5V to ±18V Dual Supplies
+9V to +36V Single Supply
♦ Low Power Consumption, <2mW
On-resistance is 175Ω max and is matched between
switches to 10Ω max. The off-leakage current is only
0.5nA at +25°C and 10nA at +85°C.
2
♦ Four Separately Controlled SPST Switches
/MAX451
♦ Pin-Compatible with Industry-Standard
The MAX4511 has four normally closed switches. The
MAX4512 ha s four norma lly op e n s witc he s . The
MAX4513 has two normally closed and two normally
open switches.
DG411/DG412/DG413, DG201/DG202/DG213
♦ TTL- and CMOS-Compatible Logic Inputs with
Single +9V to +15V or ±15V Supplies
These CMOS switches can operate with dual power
supplies ranging from ±4.5V to ±18V or a single supply
between +9V and +36V.
P in Co n fig u ra t io n s /
3
All digital inputs have +0.8V and +2.4V logic thresh-
olds, ensuring both TTL- and CMOS-logic compatibility
when using ±15V or a single +12V supply.
Fu n c t io n a l Dia g ra m s /Tru t h Ta b le s
TOP VIEW
Ap p lic a t io n s
ATE Equipment
1
2
3
4
5
6
7
8
IN1
COM1
NC1
16
15
14
IN2
Data Acquisition
COM2
NC2
Industrial and Process-Control Systems
Avionics
V-
13 V+
Redundant/Backup Systems
MAX4511
N.C.
12
11
10
9
GND
NC4
NC3
COM3
IN3
Ord e rin g In fo rm a t io n
COM4
IN4
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
MAX4511CPE
MAX4511CSE
MAX4511C/D
MAX4511EPE
MAX4511ESE
MAX4511MJE
0°C to +70°C
DIP/SO
0°C to +70°C
MAX4511
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
16 Plastic DIP
16 Narrow SO
16 CERDIP
LOGIC
SWITCH
0
1
ON
OFF
N.C. = NOT CONNECTED
Ordering Information continued at end of data sheet.
SWITCHES SHOWN FOR LOGIC "0" INPUT.
ALL SWITCHES ARE OFF WITH POWER REMOVED.
*Contact factory for dice specifications.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Continued at end of data sheet.
________________________________________________________________ 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 408-737-7600 ext. 3468.
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
ABSOLUTE MAXIMUM RATINGS
3
(Voltages Referenced to GND)
Continuous Power Dissipation (T = +70°C) (Note 2)
A
V+ ........................................................................-0.3V to +44.0V
V- .........................................................................-44.0V to +0.3V
V+ to V-................................................................-0.3V to +44.0V
COM_, IN_ (Note 1) ..............................(V- - 0.3V) to (V+ + 0.3V)
NC_, NO_ (Note 2)..................................(V+ - 36V) to (V- + 36V)
NC_, NO_ to COM_ .................................................-36V to +36V
Continuous Current into Any Terminal..............................±30mA
Peak Current into Any Terminal
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
MAX451_C_ E ......................................................0°C to +70°C
MAX451_E_ E ...................................................-40°C to +85°C
MAX451_MJE .................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
/MAX451
(pulsed at 1ms, 10% duty cycle)...................................±50mA
2
Note 1: COM_ and IN_ pins are not fault protected. Signals on COM_ or IN_ exceeding V+ or V- are clamped by internal diodes.
Limit forward diode current to maximum current rating.
Note 2: NC_ and NO_ pins are fault protected. Signals on NC_ or NO_ exceeding -36V to +36V may damage the device. These
limits apply with power applied to V+ or V-, or ±40V with V+ = V- = 0.
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.
/MAX451
1
ELECTRICAL CHARACTERISTICS—Dual Supplies
V+ = +15V, V- = -15V, GND = 0V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
(
MIN
TYP
(Note 3)
MAX
PARAMETER
ANALOG SWITCH
SYMBOL
CONDITIONS
T
A
UNITS
Fault-Protected Analog
Signal Range
Applies with power on or off
(Note 2)
V
, V
C, E, M
C, E, M
-36
V-
36
V+
V
V
V
NO_ NC_
MAX451
Applies with power on or off
(Note 2)
Fault-Free Analog Signal Range
V
, V
NO_ NC_
Non-Protected Analog
Signal Range (COM_ Output)
Applies with power on or off
(Note 1)
V
C, E, M V- - 0.3
V+ + 0.3
COM_
+25°C
C, E
M
125
3
160
200
250
6
COM_ -NO_ or COM_ -NC_
On-Resistance
R
V
= ±10V, I
= 1mA
= 1mA
Ω
ON
COM_
COM_
+25°C
C, E
M
COM_ -NO_ or COM_ -NC_
On-Resistance Match Between
Channels (Note 4)
∆R
V
COM_
= ±10V, I
= ±14V;
10
Ω
ON
COM_
15
+25°C
C, E
M
-0.5
-10
0.01
0.01
0.01
0.5
10
NO_ or NC_ Off Leakage Current
(Note 5)
I
I
V
COM_
NO_(OFF),
nA
nA
nA
±
V
V =
14V
NC_(OFF)
NO_, COM
-200
-0.5
-10
200
0.5
10
+25°C
C, E
M
COM_ Off Leakage Current
(Note 5)
V
COM_
= ±14V;
I
COM_(OFF)
±
V
V
=
14V
NO_, COM
-200
-0.5
-20
200
0.5
20
+25°C
C, E
M
COM_ On Leakage Current
(Note 5)
I
V
COM_
= ±14V
COM_(ON)
-400
400
2
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
V+ = +15V, V- = -15V, GND = 0V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
(
MIN
TYP
(Note 3)
MAX
PARAMETER
SYMBOL
CONDITIONS
T
A
UNITS
FAULT (V+ = +15V, V- = -15V, unless otherwise noted.)
+25°C
C, E
M
-10
-200
-1
10
200
1
nA
µA
nA
µA
nA
µA
mA
COM_ Output Leakage Current,
Supplies On
1
I
V
or V _ = ±33V
COM_
NO_ NC
/MAX451
+25°C
C, E
M
-20
-200
-10
-20
-200
-10
8
20
200
10
20
200
10
13
-7
NO_ or NC_ Off Input Leakage
Current, Supplies On
V
or V _ = ±25V,
NO_ NC
I
, I
NO_ NC_
±
V
COM_
=
10V
+25°C
C, E
M
0.1
NO_ or NC_ Input Leakage
Current, Supplies Off
V
or V _ = ±40V,
NO_ NC
I
, I
NO_ NC_
V+ = 0, V- = 0
2
V
NO_
or V _ = 33V
11
-10
1
COM_ On Output Current,
Supplies On
NC
I
+25°C
COM_
/MAX451
V
NO_
or V _ = -33V
-12
NC
+25°C
2.5
3
COM_ On Output Resistance,
Supplies On
R
V
or V _ = ±33V
kΩ
COM_
NO_ NC
C, E, M
LOGICINPUT
IN_ Input Logic Threshold High
IN_ Input Logic Threshold Low
V
C, E, M
C, E, M
+25°C
1.9
1.9
2.4
V
V
IN_H
V
IN_L
0.8
-1
0.03
1
5
IN_ Input Current Logic High
or Low
I
_, I
V _ = 0.8V or 2.4V
IN
µA
INH
INL
C, E, M
-5
3
SWITCHDYNAMICCHARACTERISTICS
+25°C
C, E
M
350
200
500
600
900
400
500
750
V
= ±10V, R = 2kΩ,
L_
COM_
Turn-On Time
Turn-Off Time
t
ns
ns
ON
Figure 2
+25°C
C, E
M
V
COM_
= ±10V, R = 2kΩ,
L_
t
OFF
Figure 2
Break-Before-Make Time
Delay (MAX4513 Only)
V
COM_
Figure 3
= ±10V, R = 2kΩ,
L_
t
+25°C
+25°C
50
100
1.5
ns
BBM
Q
C
R
= 1.0nF, V
= 0Ω, Figure 4
= 0,
L
S
NO_
Charge Injection (Note 6)
5
pC
NO_ or NC_ Off-Capacitance
COM_ Off-Capacitance
COM_ On-Capacitance
C
f = 1MHz, Figure 5
f = 1MHz, Figure 5
f = 1MHz, Figure 5
+25°C
+25°C
+25°C
10
5
pF
pF
pF
N_(OFF)
C
COM_(OFF)
C
10
COM_(ON)
R
V
N_
= 50Ω, C = 15pF,
L
L
Off Isolation (Note 7)
VC
+25°C
+25°C
-62
-66
dB
dB
ISO
= 1V
, f = 1MHz, Figure 6
RMS
Channel-to-Channel Crosstalk
(Note 9)
R = 50Ω, C = 15pF,
L L
V
N_
V
CT
= 1V
, f = 1MHz, Figure 6
RMS
_______________________________________________________________________________________
3
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
3
V+ = +15V, V- = -15V, GND = 0V, T
T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A = MIN
(
MIN
TYP MAX
(Note 3)
PARAMETER
SYMBOL
CONDITIONS
T
A
UNITS
POWER SUPPLY
Power-Supply Range
V+, V-
I+
C,E, M
+25°C
C, E, M
+25°C
C, E, M
+25°C
C, E, M
+25°C
C, E, M
±4.5
±18
400
600
200
300
1
V
280
90
V+ Supply Current
V- Supply Current
All V = 0 or 5V
µA
IN_
/MAX451
2
I-
All V = 0 or 5V
µA
µA
µA
IN_
-1
0.01
150
All V = 0 or 15V
IN_
10
GND Supply Current
I
GND
250
450
All V = 5V
IN_
/MAX451
1
MAX451
4
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +10.8V to +13.2V, V- = 0, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
MIN
TYP MAX
(Note 3)
PARAMETER
SYMBOL
CONDITIONS
T
A
UNITS
ANALOG SWITCH
Fault-Protected Analog
Signal Range
Applies with power on or off
(Note 2)
V
, V
C, E, M
C, E, M
C, E, M
-36
0
36
V
V
V
NO_ NC_
1
/MAX451
Applies with power on or off
(Note 2)
Fault-Free Analog Signal Range
V
, V
V+
NO_ NC_
Non-Protected Analog
Signal Range (COM_ Output)
Applies with power on or off
(Note 1)
V
-0.3
V+ + 0.3
COM_
+25°C
C, E
M
260
4
390
450
525
10
COM_ -NO_ or COM_ -NC_
On-Resistance
V+ = 12V, V
= 10V,
= 10V,
= 10V;
COM_
COM_
COM_
R
Ω
ON
I
= 1mA
COM_
2
+25°C
C, E
M
COM_ -NO_ or COM_ -NC_
On-Resistance Match Between
Channels (Note 4)
V+ = 12V, V
/MAX451
∆R
20
Ω
ON
I
= 1mA
COM_
30
+25°C
C, E
M
-0.5
-10
0.01
0.01
0.01
0.5
10
NO_ or NC_ Off Leakage Current
(Notes 5, 9)
I
I
V+ = 12V; V
ON_(OFF),
nA
nA
nA
V
, V = 0 or 12V
NC_(OFF)
NO_ NC
-200
-0.5
-10
200
0.5
10
+25°C
C, E
M
COM_ Off Leakage Current
(Notes 5, 9)
V+ = 12V; V
= 0;
COM _
= 12V
I
COM_(OFF)
V
, V
NO_ NC_
3
-200
-0.5
-20
200
0.5
20
+25°C
C, E
M
COM_ On Leakage Current
(Notes 5, 9)
V+ = 12V,
I
COM_(ON)
V
COM_
= 10V or 12V
-400
400
FAULT
+25°C
C, E
M
-10
-200
-1
10
200
1
nA
µA
nA
µA
nA
µA
mA
COM_ Output Leakage
Current, Supply On
V
or V _ = ±30V,
NO_ NC
I
COM_
V+ = 12V
+25°C
C, E
M
-20
20
NO_ or NC_ Off Input Leakage
Current, Supply On
V
or V _ = ±25V,
= 0, V+ = 12V
NO_ NC
I
, I
-200
-10
200
10
NO_ NC_
V
COM_
+25°C
C, E
M
-20
0.1
20
NO_ or NC_ Input Leakage
Current, Supply Off
V
or V _ = ±40V,
NO_ NC
I
, I
-200
-10
200
10
NO_ NC_
V+ = 0, V- = 0
COM_ Output Current,
Supply On
V
NO_
V+ = 12V
or V _ = 25V,
NC
I
+25°C
+25°C
2
3
5
5
COM_
COM_ Output Resistance,
Supply On
V
NO_
V+ = 12V
or V _ = 10V
NC
R
2.4
kΩ
COM_
_______________________________________________________________________________________
5
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
3
(V+ = +10.8V to +13.2V, V- = 0, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
MIN
TYP
(Note 3)
MAX
PARAMETER
SYMBOL
CONDITIONS
T
A
UNITS
LOGIC INPUT
IN_ Input Logic Threshold High
IN_ Input Logic Threshold Low
V
C, E, M
C, E, M
+25°C
1.8
1.8
2.4
V
V
IN_H
V
IN_L
0.8
-1
0.03
1
5
IN_ Input Current Logic High
or Low
/MAX451
I
, I
V _ = 0.8V or 2.4V
IN
µA
IN_H IN_L
C, E, M
-5
2
SWITCH DYNAMIC CHARACTERISTICS
+25°C
C, E, M
+25°C
500
400
1000
1500
900
V
= 10V, R = 2kΩ,
L_
COM_
Turn-On Time
Turn-Off Time
t
ns
ns
ns
ON
Figure 2
V
COM_
= 10V, R = 2kΩ,
L_
t
OFF
Figure 2
C, E, M
1200
Break-Before-Make Time
Delay (MAX4513 Only)
V
COM_
Figure 3
= 10V, R = 2kΩ,
L_
t
+25°C
50
100
BBM
Q
/MAX451
C
R
= 1.0nF, V
= 0,
L
S
NO_
1
Charge Injection (Note 6)
NO_ or NC_ Off Capacitance
COM_ Off Capacitance
+25°C
+25°C
+25°C
1
9
9
5
pC
pF
pF
= 0Ω, Figure 4
C
f = 1MHz, Figure 5
N_ (OFF)
V
COM_
= GND, f = 1MHz,
C
COM_ (OFF)
Figure 5
V
= V
= GND,
NO_
COM_
COM_ On Capacitance
Off Isolation (Note 7)
C
+25°C
+25°C
+25°C
22
-62
-65
pF
dB
dB
COM_ (ON)
f = 1MHz, Figure 5
MAX451
R
= 50Ω, C = 15pF,
L
L
V
ISO
V
N_
= 1V
, f = 1MHz, Figure 6
RMS
Channel-to-Channel Crosstalk
(Note 8)
R = 50Ω, C = 15pF,
L L
V
N_
V
CT
= 1V
, f = 1MHz, Figure 5
RMS
POWER SUPPLY
Power-Supply Range
V+
I+
C,E, M
+25°C
C, E, M
+25°C
C, E, M
+25°C
C, E, M
9
36
V
150
50
300
450
100
200
300
450
V+ Supply Current
All V = 0 or 5V
µA
IN_
All V = 0 or 12V
µA
IN_
V- and GND Supply Current
I
GND
150
All V = 5V
IN_
Note 1: COM_ and IN_ pins are not fault protected. Signals on COM_ or IN_ exceeding V+ or V- are clamped by internal diodes.
Limit forward diode current to maximum current rating.
Note 2: NC_ and NO_ pins are fault protected. Signals on NC_ or NO_ exceeding -36V to +36V may damage the device. These
limits apply with power applied to V+ or V-, or ±40V with V+ = V- = 0.
Note 3: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 4: ∆R
= ∆R
- ∆R
.
ON(MIN)
ON
ON(MAX)
Note 5: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at T = +25°C.
A
Note 6: Guaranteed by design.
Note 7: Off isolation = 20 log10 [ V
/ (V
or V
) ], V
= output, V
or V
= input to off switch.
COM_
NC_
NO_
COM_
NC_
NO_
Note 8: Between any two switches.
Note 9: Leakage testing for single-supply operation is guaranteed by testing with dual supplies.
6
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(T = +25°C, unless otherwise noted.)
A
SWITCH ON-RESISTANCE
SWITCH ON-RESISTANCE vs. V
TEMPERATURE (DUAL SUPPLIES)
AND
COM
SWITCH ON-RESISTANCE
vs. V (SINGLE SUPPLY)
vs. V
(DUAL SUPPLIES)
COM
COM
350
300
250
200
150
100
50
200
180
160
140
120
100
80
1000
V- = 0
V+ = +5V
V- = -5V
T = +125°C
T = +85°C
V+ = +5V
A
A
1
/MAX451
V+ = +12V
V- = -12V
V+ = +10V
V- = -10V
V+ = +15V
V+ = +12V
V+ = +20V
V+ = +24V
V+ = +30V
T = +25°C
A
T = -55°C
A
T = -40°C
A
60
40
V+ = +15V
V- = -15V
V+ = +20V
V- = -20V
V+ = +15V
V- = -15V
20
2
0
0
100
-20 -15 -10 -5
0
5
10 15 20
-15
-10
-5
0
5
10
15
0
5
10
15
20
25
30
/MAX451
V
COM
(V)
V
COM
(V)
V
COM
(V)
CHARGE INJECTION
SWITCH ON-RESISTANCE vs. V
I
, I
, AND I
COM
D(ON) S(OFF) D(OFF)
vs. V
(DUAL SUPPLIES)
AND TEMPERATURE (SINGLE SUPPLY)
LEAKAGES vs. TEMPERATURE
COM
14
400
350
300
250
200
150
100
50
100n
10n
1n
T = +125°C
A
V+ = +15V
V- = -15V
T = +85°C
A
I
@V = -14V,
NO
COM(OFF)
12
10
8
V
COM =
+14V
I
@V = +14V,
COM(OFF)
VCOM = -14V
NO
DUAL ±15V
SUPPLIES
T = -40°C
A
T = +25°C
A
3
I
@V
NO
COM(ON)
= V
= -14V
COM
I
@V
NO
= +14V
COM(ON)
6
100p
10p
1p
= V
COM
T = -55°C
A
I
V
@V = -14V,
4
SINGLE +12V
SUPPLY
NO(OFF)
NO
= +14V
COM
2
I
V
@V = +14V,
NO
NO(OFF)
V+ = +12V
2
= -14V
COM
0
0
0
4
6
8
10
12
-15
-10
-5
0
5
10
15
-50 -25
0
25 50 75 100 125 150
V
COM
(V)
V
COM
(V)
TEMPERATURE (°C)
ON AND OFF TIMES
vs. TEMPERATURE
POWER-SUPPLY CURRENT
vs. TEMPERATURE
ON AND OFF TIMES
vs. SUPPLY VOLTAGE
600
500
400
300
200
100
0
1000
900
800
700
600
500
400
300
200
100
0
600
500
400
300
200
100
0
t
ON
t
ON
(DUAL SUPPLIES)
t
ON
(SINGLE SUPPLY)
I
V+
I
GND
t
OFF
I
V-
t
(SINGLE
SUPPLY)
OFF
t
OFF
(DUAL SUPPLIES)
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
0
5
10
15
20
TEMPERATURE (°C)
TEMPERATURE (°C)
SUPPLY VOLTAGE (±V)
_______________________________________________________________________________________
7
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
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 )
3
(T = +25°C, unless otherwise noted.)
A
LOGIC-LEVEL THRESHOLD vs. V+
FREQUENCY RESPONSE
MAX186-14A
3.0
2.5
2.0
1.5
1.0
0.5
0
0
-10
120
100
80
ON LOSS
-20
-30
60
/MAX451
OFF LOSS
-40
40
2
-50
20
-60
0
-70
-20
-40
-60
-80
-100
-120
-80
ON PHASE
-90
-100
-110
-120
0
5
10
15
20
25
30
35
0.01
0.1
1
10
100
1000
/MAX451
V+ (V)
FREQUENCY (MHz)
1
P in De s c rip t io n
De t a ile d De s c rip t io n
PIN
NAME
FUNCTION
Ove rvie w o f Tra d it io n a l
Fa u lt -P ro t e c t e d S w it c h e s
1, 16,
9, 8
IN1–IN4 Logic Control Digital Inputs
MAX451
The MAX4511/MAX4512/MAX4513 are fault-protected
CMOS analog switches with unusual operation and
construction. Traditional fault-protected switches are
constructed by three series FETs. This produces good
off characteristics, but fairly high on-resistance when
the signals are within about 3V of each supply rail. As
the voltage on one side of the switch approaches with-
in about 3V of either supply rail (a fault condition), the
switch impedance becomes higher, limiting the output
signal range (on the protected side of the switch) to
approximately 3V less than the appropriate polarity
supply voltage.
2, 15, COM1–
10, 7
Analog Switch Common* Terminals
COM4
NO1–NO4
or
3, 14,
11, 6
Analog Switch Fault-Protected Normally
Open* or Normally Closed* Terminals
NC1–NC4
Negative Analog Supply Voltage Input.
Connect to GND for single-supply operation.
4
V-
Ground. Connect to digital ground. (Analog
signals have no ground reference.)
5
GND
N.C.
V+
12
13
No Connection—not internally connected
During a fault condition, the output current that flows
from the p rote c te d s id e of the s witc h into its loa d
comes from the fault source on the other side of the
switch. If the switch is open or the load is extremely
high impedance, the input current will be very low. If
the s witc h is on a nd the loa d is low imp e d a nc e ,
enough current will flow from the source to maintain the
load voltage at 3V less than the supply.
Positive Analog and Digital Supply-Voltage
Input. Internally connected to substrate.
*As long as the voltage on NO_ or NC_ does not exceed V+ or
V-, NO_ (or NC_) and COM_ pins are identical and interchange-
able. Either may be considered as an input or output; signals
pass equally well in either direction.
8
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
NORMALLY OPEN SWITCH CONSTRUCTION
V+
P2
HIGH
FAULT
1
P1
/MAX451
COM_
NO_
(NC_)
N1
LOW
FAULT
ON
IN_
2
/MAX451
GND
V-
N2
-ESD DIODE
NC SWITCH
3
Figure 1. Block Diagram
When power is removed, the fault protection is still in
effect. In this case, the NO_ or NC_ terminals are a vir-
tual open circuit. The fault can be up to ±40V.
Ove rvie w o f MAX4 5 1 1 /MAX4 5 1 2 /MAX4 5 1 3
The MAX4511/MAX4512/MAX4513 differ considerably
from traditional fault-protection switches, with several
advantages. First, they are constructed with two paral-
lel FETs, allowing very low on-resistance when the
switch is on. Second, they allow signals on the NC_ or
NO_ pins that are within or slightly beyond the supply
rails to be passed through the switch to the COM termi-
nal, allowing rail-to-rail signal operation. Third, when a
signal on NC_ or NO_ exceeds the supply rails by
about 50mV (a fault condition), the voltage on COM_ is
limite d to the a p p rop ria te p ola rity s up p ly volta g e .
Operation is identical for both fault polarities. The fault-
protection extends to ±36V from GND.
The COM_ pins are not fault protected; they act as nor-
mal CMOS switch pins. If a voltage source is connect-
ed to any COM_ pin, it should be limited to the supply
voltages. Exceeding the supply voltage will cause high
currents to flow through the ESD protection diodes,
possibly damaging the device (see Absolute Maximum
Ratings).
P in Co m p a t ib ilit y
These switches have identical pinouts to common non-
fault-protected CMOS switches. Care should be exer-
cised in considering them for direct replacements in
existing printed circuit boards, however, since only the
NO_ and NC_ pins of each switch are fault protected.
During a fault condition, the NO_ or NC_ input pin
becomes high impedance regardless of the switch
state or load resistance. 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 typically source or sink up to 10mA.
In t e rn a l Co n s t ru c t io n
Internal construction is shown in Figure 1, with the ana-
log signal paths shown in bold. A single normally open
_______________________________________________________________________________________
9
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
(NO) switch is shown; the normally closed (NC) config-
COM_ a n d IN_ P in s
FETs N2 and P2 can source about ±10mA from V+ or V-
to the COM_ pin in the fault condition. Ensure that if the
COM_ pin is connected to a low-resistance load, the
a b solute ma ximum c urre nt ra ting of 30mA is ne ve r
exceeded, both in normal and fault conditions.
3
uration is identical except the logic-level translator
becomes an inverter. 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-
ously according to the input fault condition and the
logic-level state.
The GND, COM_, and IN_ pins do not have fault protec-
tion. Reverse ESD-protection diodes are internally con-
nected between GND, COM_, IN_ and both V+ and V-. If
a signal on GND, COM_, or IN_ exceeds V+ or V- by
more than 300mV, one of these diodes will conduct
heavily. 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_ (or NC_) pin with V+ and V-. When the signal
on NO_ or NC_ is between V+ and V- the switch acts
normally, with FETs N1 and P1 turning on and off in
response to IN_ signals. The parallel combination of
N1 and P1 forms a low-value resistor between NO_ (or
NC_) and COM_ so that signals pass equally well in
either direction.
/MAX451
2
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 NC_ or NO_ pins is
±36V with power applied and ±40V with power off.
P o s it ive Fa u lt Co n d it io n
When the signal on NO_ (or NC_) exceeds V+ by about
50mV, the high-fault comparator output is high, turning
off FETs N1 and P1. This makes the NO_ (or NC_) pin
high impedance regardless of the switch state. If the
switch state is “off”, all FETs are turned off and both
NO_ (or NC_) and COM_ are high impedance. If the
switch state is “on”, FET P2 is turned on, sourcing cur-
rent from V+ to COM_.
Fa ilu re Mo d e s
The MAX4511/MAX4512/MAX4513 are not lightning
arrestors or surge protectors.
/MAX451
1
Exceeding the fault-protection voltage limits on NO_ or
NC_, even for very short periods, can cause the device
to fail. The failure modes may not be obvious, and fail-
ure in one switch may or may not affect other switches
in the same package.
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 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.
Ne g a t ive Fa u lt Co n d it io n
When the signal on NO_ (or NC_) exceeds V- by about
50mV, the low-fault comparator output is high, turning
off FETs N1 and P1. This makes the NO_ (or NC_) pin
high impedance regardless of the switch state. If the
switch state is “off,” all FETs are turned off and both
NO_ (or NC_) and COM_ are high impedance. If the
switch state is “on,” FET N2 is turned on, sinking cur-
rent from COM_ to V-.
MAX451
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 analog switch-
es. This drive signal is the only connection between the
power supplies and the analog signals. GND, IN_, and
COM_ have ESD-protection diodes to V+ and V-.
Tra n s ie n t Fa u lt Re s p o n s e a n d Re c o ve ry
When a fast rise-time and fall-time transient on IN_
exceeds V+ or V-, the output (COM_) follows the input
(IN_) to the supply rail with only a few nanoseconds
delay. This delay is due to the switch on-resistance and
circuit capacitance to ground. When the input transient
returns to within the supply rails, however, there is a
longer output recovery time delay. For positive faults, the
recovery time is typically 3.5µs. For negative faults, the
recovery time is typically 1.3µs. These values depend on
the COM_ output resistance and capacitance, and are
not production tested or guaranteed. The delays are not
dependent on the fault amplitude. Higher COM_ output
resistance and capacitance increase recovery times.
IN_ Lo g ic -Le ve l Th re s h o ld s
The logic-level thresholds are CMOS and TTL compati-
ble when V+ is +15V. As V+ is raised the threshold
increases slightly, and when V+ reaches 25V the level
threshold is about 2.8V—above the TTL output high
level minimum of 2.4V, but still compatible with CMOS
outputs (see Typical Operating Characteristics).
Increasing V- has no effect on the logic-level thresholds,
but it does increase the gate-drive voltage to the signal
FETs, reducing their on-resistance.
10 ______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
20MHz, the on-response has several minor peaks that
are highly layout dependent. The problem with high-fre-
quency operation is not turning the switch on, but turn-
ing it off. The off-state switch acts like a capacitor and
passes higher frequencies with less attenuation. At
10MHz, off isolation is about -42dB in 50Ω systems,
becoming worse (approximately 20dB per decade) as
frequency increases. Higher circuit impedances also
make off isolation worse. Adjacent channel attenuation
is about 3dB above that of a bare IC socket and is due
entirely to capacitive coupling.
Bip o la r S u p p lie s
The MAX4511/MAX4512/MAX4513 operate with bipolar
supplies between ±4.5V and ±18V. The V+ and V- sup-
plies need not be symmetrical, but their difference can
not exceed the absolute maximum rating of 44V.
S in g le S u p p ly
The MAX4511/MAX4512/MAX4513 operate from a sin-
gle supply between +9V and +36V when V- is connect-
ed to GND.
1
/MAX451
Hig h -Fre q u e n c y P e rfo rm a n c e
In 50Ω systems, signal response is reasonably flat up to
50MHz (see Typical Operating Characteristics). Above
Te s t Circ u it s /Tim in g Dia g ra m s
2
V+
V+
/MAX451
V+
V
IN_
50%
NO_ OR NC_
+10V
0V
MAX4511
+10V
MAX4512
MAX4513
V
IN_
IN_
90%
COM_
V-
V
OUT
V
90%
OUT
GND
50Ω
2k
10pF
3
0V
V-
t
ON
t
OFF
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 2. Switch Turn-On/Turn-Off Times
t < 5ns
t < 5ns
F
R
V+
V+
0V
V
IN_
50%
V
IN_
V+
NO_
NC_
IN_
IN_
+10V
50Ω
V
, V
MAX4513
NO_ NC_
COM_
COM_
80%
V
OUT
GND V-
V
OUT
10pF
2k
0V
V-
t
OPEN
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 3. MAX4513 Break-Before-Make Interval
______________________________________________________________________________________ 11
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
3
V+
V+
V+
0V
V
IN_
IN_
NO_ OR NC_
V
IN_
50Ω
MAX4511
MAX4512
MAX4513
/MAX451
∆ V
OUT
V
OUT
V
COM_
V-
OUT
2
C
GND
L
1000pF
V-
∆ V IS THE MEASURED VOLTAGE DUE TO CHARGE-
OUT
TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Q = ∆ V x C
OUT L
/MAX451
Figure 4. Charge Injection
1
V+
V+
NO_
NC_
V+
MAX451
MAX4511
MAX4512
MAX4513
1MHz
COM_
IN_
CAPACITANCE
ANALYZER
ADDRESS SELECT
V-
GND
V-
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 5. COM_, NO_, NC_ Capacitance
12 ______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
V+ 10nF
V+
NETWORK
ANALYZER
V
OUT
V
IN
50Ω
50Ω
V
IN
1
OFF ISOLATION = 20 log
ON LOSS = 20 log
COM_
/MAX451
V
MAX4511
MAX4512
OUT
V
IN
MAX4513
V
V
V
OUT
OUT
CROSSTALK = 20 log
MEAS.
REF.
IN_
ADDRESS SELECT
NO_, NC_
V-
IN
GND
50Ω
50Ω
10nF
V-
2
/MAX451
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS.
OFF ISOLATION IS MEASURED BETWEEN COM_ AND “OFF” NO_ OR NC_ TERMINALS.
ON LOSS IS MEASURED BETWEEN COM_ AND “ON” NO_ OR NC_ TERMINALS.
CROSSTALK IS MEASURED BETWEEN COM_ TERMINALS WITH ALL SWITCHES ON.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 6. Frequency Response, Off Isolation, and Crosstalk
3
P in Co n fig u ra t io n s /Fu n c t io n a l Dia g ra m s /Tru t h Ta b le s (c o n t in u e d )
TOP VIEW
1
2
3
4
5
6
7
8
IN1
16 IN2
15 COM2
14 NC2
13 V+
1
2
3
4
5
6
7
8
IN1
16 IN2
15 COM2
14 NO2
13 V+
COM1
NO1
V-
COM1
NO1
V-
MAX4513
12
MAX4512
GND
NO4
N.C.
12
GND
NO4
N.C.
11
10
9
NC3
COM3
IN3
11
10
9
NO3
COM3
IN3
COM4
IN4
COM4
IN4
DIP/SO
DIP/SO
MAX4513
MAX4512
SWITCHES
1, 4
SWITCHES
2, 3
LOGIC
SWITCH
LOGIC
0
1
OFF
ON
0
1
OFF
ON
ON
OFF
N.C. = NOT CONNECTED
SWITCHES SHOWN FOR LOGIC “0” INPUT.
ALL SWITCHES ARE OFF WITH POWER REMOVED.
______________________________________________________________________________________ 13
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
Ch ip To p o g ra p h ie s
Ord e rin g In fo rm a t io n (c o n t in u e d )
3
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
MAX4511
NC1 COM1 IN1 IN2
MAX4512CPE
MAX4512CSE
MAX4512C/D
MAX4512EPE
MAX4512ESE
MAX4512MJE
MAX4513CPE
MAX4513CSE
MAX4513C/D
MAX4513EPE
MAX4513ESE
MAX4513MJE
COM2
0°C to +70°C
0°C to +70°C
NC2
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
16 Plastic DIP
16 Narrow SO
16 CERDIP
/MAX451
16 Plastic DIP
16 Narrow SO
Dice*
2
0°C to +70°C
0°C to +70°C
V+
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
16 Plastic DIP
16 Narrow SO
16 CERDIP
V-
0.138"
(3.51mm)
GND
* Contact factory for dice specifications.
/MAX451
1
NC4
NC3
COM4 IN4 IN3 COM3
0.086"
(2.261mm)
MAX4513
MAX4512
COM2
NO1COM1 IN1 IN2
NC2
COM2
NO1 COM1 IN1 IN2
NO2
MAX451
V+
V+
V-
V-
GND
0.138"
(3.51mm)
0.138"
(3.51mm)
GND
NO4 COM4 IN4 IN3 COM3 NC3
NO4 COM4 IN4 IN3 COM3 NO3
0.086"
0.086"
(2.261mm)
(2.261mm)
TRANSISTOR COUNT: 139
SUBSTRATE CONNECTED TO: V+
14 ______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
MAX451
________________________________________________________P a c k a g e In fo rm a t io n
1
/MAX451
2
/MAX451
3
______________________________________________________________________________________ 15
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P S T An a lo g S w it c h e s
P a c k a g e In fo rm a t io n (c o n t in u e d )
3
/MAX451
2
/MAX451
1
MAX451
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
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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