MAX4533CAP [MAXIM]
Quad, Rail-to-Rail, Fault-Protected, SPDT Analog Switch; 四，轨到轨，故障保护， SPDT模拟开关
| 型号： | MAX4533CAP |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Quad, Rail-to-Rail, Fault-Protected, SPDT Analog Switch |
| 文件： | 总12页 (文件大小：174K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1452; Rev 0; 4/99
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
MAX453
Ge n e ra l De s c rip t io n
Fe a t u re s
♦ Rail-to-Rail Signal Handling
The MAX4533 quad, single-pole/double-throw (SPDT),
fault-protected analog switch is pin-compatible with the
industry-standard MAX333 and MAX333A. The MAX4533
♦ ±40V Fault Protection with Power Off
±25V Fault Protection with ±15V Supplies
®
features fault-protected inputs and Rail-to-Rail signal
♦ All Switches Off with Power Off
handling. The normally open (NO_ ) and normally closed
(NC_ ) terminals are protected from overvoltage faults up
to ±25V with power on and up to ±40V with power off.
During a fault condition, NO_ and NC_ become high
impedance with only nanoamperes of leakage current
flowing to the source. In addition, the output (COM_)
clamps to the appropriate polarity supply rail and pro-
vides up to ±10mA of load current. This ensures unam-
biguous rail-to-rail outputs when a fault occurs.
♦ No Power-Supply Sequencing Required During
Power-Up or Power-Down
♦ Output Clamped to Appropriate Supply Voltage
During Fault Condition—No Transition Glitch
♦ 1kΩ (typ) Output Clamp Resistance During
Overvoltage
♦ 175Ω (max) Signal Paths with ±15V Supplies
♦ 20ns (typ) Fault Response Time
The MAX4533 operates from dual ±4.5V to ±18V power
supplies or a single +9V to +36V supply. All digital inputs
have +0.8V and +2.4V logic thresholds, ensuring both
TTL and CMOS logic compatibility when using ±15V
supplies or a +12V supply. On-resistance is 175Ω max
and is matched between switches to 10Ω max. The off-
♦ ±4.5V to ±18V Dual Supplies
+9V to +36V Single Supply
♦ Pin-Compatible with Industry-Standard
MAX333/MAX333A
leakage current is only 0.5nA at T = +25°C and 10nA at
T = +85°C.
A
A
♦ TTL/CMOS-Compatible Logic Inputs with ±15V or
Single +9V to +15V Supplies
Ap p lic a t io n s
Portable Instruments
Ord e rin g In fo rm a t io n
Redundant/Backup Systems
Test Equipment
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
20 SSOP
Data-Acquisition
Systems
MAX4533CAP
MAX4533CSP
Communications Systems
Industrial and Process Control
20 Wide SO
Avionics Systems
Ordering Information continued at end of data sheet.
P in Co n fig u ra t io n /
Fu n c t io n a l Dia g ra m
Typ ic a l Op e ra t in g Circ u it
INPUTS
V1
OUTPUTS
V1 - V2
TOP VIEW
IN1
NO1
IN4
1
2
20
V2
NO4
19
COM1
NC1
COM4
3
18
OSC
IN
NC4
4
17
MAX4533
V3 - V4
V-
GND
NC2
V+
5
16
MAX4533
N.C.
NC3
COM3
NO3
IN3
6
15
14
13
12
11
7
V3
V4
COM2
NO2
8
9
IN2
10
FLYING CAPACITOR LEVEL TRANSLATOR
(2-CHANNEL)
SSOP/SO/DIP/CERDIP
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
† Patent Pending
SWITCHES ARE SHOWN WITH LOGIC "0" INPUT
N.C. = NOT INTERNALLY CONNECTED
________________________________________________________________ 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.
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
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_, IN_ (Note 1) ............................. (V- - 0.3V) to (V+ + 0.3V)
NC_, NO_ (Note 2)..................................(V+ - 40V) to (V- + 40V)
NC_, NO_ to COM_ .................................................-40V to +40V
NC_, NO_ Overvoltage with Switch Power On
(supplies at ±15V)................................................-30V to +30V
NC_, NO_ Overvoltage with Switch Power Off........-40V to +40V
Continuous Current into Any Terminal..............................±30mA
Peak Current into Any Terminal
SSOP (derate 10.53mW/°C above +70°C) ...................842mW
Wide SO (derate 10.00mW/°C above +70°C).............. 800mW
Plastic DIP (derate 11.11mW/°C above +70°C) ...........889mW
CERDIP (derate 11.11mW/°C above +70°C)................889mW
Operating Temperature Ranges
MAX4533C_ _ ......................................................0°C to +70°C
MAX4533E_ _ ...................................................-40°C to +85°C
MAX4533M_ _.................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
MAX453
(pulsed at 1ms,10% duty cycle)....................................±50mA
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 -25V to +25V may damage the device. These
limits apply with power applied to V+ or V-. The limit is ±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.
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +15V, V- = -15V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 3)
MAX A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
T
MIN
TYP
MAX
UNITS
A
ANALOG SWITCH
Fault-Free Analog Signal Range
(Note 2)
V+ = +15V, V- = -15V,
V
NO
, V
C, E, M
V-
V+
V
_
_
NC
V
_ or V _ = ±15V
NC
NO
+25°C
C, E
M
125
1
175
200
250
6
COM_ to NO_ or COM_ to NC_
On-Resistance
V
_ or V _ = ±10V,
_ = 1mA
NO NC
R
Ω
ON
I
COM
+25°C
C, E
M
COM_ to NO_ or COM_ to NC_
On-Resistance Match Between
Channels (Note 4)
V
_ or V _ = ±10V,
NC
_ = 1mA
NO
Ω
Ω
∆R
10
ON
I
COM
15
V
COM_
= +5V, 0, -5V,
= 1mA
On-Resistance Flatness
+25°C
4
I
COM_
+25°C
C, E
M
-0.5
-10
0.02
0.5
10
NO_ or NC_ Off-Leakage
Current (Note 5)
I
V
or V
=
= ±14V,
14V
NO_(OFF),
NO_
NC_
±
nA
I
V
COM_
NC_(OFF)
-200
-0.5
-20
200
0.5
20
+25°C
C, E
M
0.01
COM_ On-Leakage Current
(Note 5)
V
COM_
= ±14V,
I
nA
COM_(ON)
V
NO_
or V
= ±14V or floating
NC_
-400
400
FAULT
Applies with power on
Applies with power off
+25°C
+25°C
+25°C
C, E
-25
-40
+25
+40
10
Fault-Protected Analog Signal
Range (Note 2)
V
, V
V
NO_ NC_
-10
nA
µA
nA
µA
COM_ Output Leakage Current,
Supplies On
V
NO_
or V
= ±25V,
NC_
I
-200
-10
200
10
COM_
no connection to “ON” channel
M
+25°C
C, E
-20
20
NO_ or NC_ Off Input Leakage
Current, Supplies On
V
or V
=
= ±25V,
NO_
NC_
I
I
-200
-10
200
10
NO_, NC_
±
10V
V
COM_
M
2
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
MAX453
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 3)
MAX A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
T
MIN
-20
-200
-10
8
TYP
MAX
20
UNITS
nA
A
+25°C
C, E
0.1
NO_ or NC_ Input Leakage
Current, Supplies Off
V
or V
= ±40V,
NO_
NC_
I
I
200
10
NO_, NC_
V+ = 0, V- = 0
M
µA
V
NO_
or V
= +25V
= -25V
NC_
+25°C
+25°C
+25°C
11
-10
1.0
13
COM_ On-Clamp Output
Current, Supplies On
NC_
I
mA
COM_
V
NO_
or V
-12
-7
2.5
3
COM_ On-Clamp Output
Resistance, Supplies On
R
V
NO_
or V = ±25V
kΩ
ns
COM_
NC
C, E, M
±Fault Output Clamp Turn-On
Delay Time (Note 6)
R = 10kΩ,
L
+25°C
20
V
NO_
or V
= ±25V
= ±25V
NC_
±Fault Recovery Time
(Note 6)
R = 10kΩ,
L
+25°C
2.5
µs
V
NO_
or V
NC_
LOGIC INPUT
IN_ Input Logic Threshold High
IN_ Input Logic Threshold Low
V
C, E, M
C, E, M
+25°C
2.4
V
V
IN_H
V
IN_L
0.8
1
-1
-5
0.03
IN_ Input Current Logic High or
Low
I
I
V
IN_
= +0.8V or +2.4V
µA
IN_H, IN_L
C, E, M
5
SWITCH DYNAMIC CHARACTERISTICS
+25°C
C, E
M
100
60
250
400
600
150
300
450
V
= ±10V,
= 2kΩ; Figure 2
COM_
Turn-On Time
Turn-Off Time
t
ns
ns
ON
R
L
+25°C
C, E
M
V
= ±10V,
= 2kΩ; Figure 2
NO_
t
OFF
R
L
V
= ±10V,
= 1kΩ; Figure 3
COM_
Break-Before-Make Time Delay
Charge Injection (Note 6)
t
+25°C
+25°C
10
50
ns
BBM
R
L
C
= 100pF,
L
Q
1.5
pC
V
COM_
= 0; Figure 4
NO_ or NC_ Off-Capacitance
COM_ On-Capacitance
C
f = 1MHz; Figure 5
f = 1MHz; Figure 5
+25°C
+25°C
5
pF
pF
N_(OFF)
C
12
COM_(ON)
R
= 50Ω, C = 15pF,
L
L
Off-Isolation (Note 7)
V
V
= 1V , f = 1MHz;
RMS
+25°C
+25°C
-62
-66
dB
dB
ISO
N_
Figure 6
R
= 50Ω, C = 15pF,
L
L
Channel-to-Channel Crosstalk
(Note 8)
V
V
= 1V
, f = 1MHz;
CT
N_
RMS
Figure 6
POWER SUPPLY
Power-Supply Range
V+, V-
I+
±4.5
±18
600
1000
400
600
300
450
V
+25°C
C, E, M
+25°C
C, E, M
+25°C
C, E, M
All V = 0 or +5V,
IN_
V+ Supply Current
V- Supply Current
GND Supply Current
µA
V
NO_
= V
= 0
NC_
All V = 0 or +5V,
IN_
I-
µA
µA
V
NO_
= V
= 0
NC_
All V = 0 or +5V,
IN_
I
GND
V
NO_
= V
= 0
NC_
_______________________________________________________________________________________
3
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
ELECTRICAL CHARACTERISTICS—Single Supply
(V+ = +12V, V- = 0, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 3)
MAX A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
T
MIN
TYP
MAX
UNITS
A
ANALOG SWITCH
Fault-Free Analog Signal Range
(Note 2)
V+ = +12V, V- = 0,
_ or V _ = +12V or 0
V
NO
, V
C, E, M
0
V+
V
_
_
NC
V
NO
NC
+25°C
C, E
M
260
4
390
450
525
10
V+ = +12V,
COM_ to NO_, COM_ to NC_
On-Resistance
R
V
NO
_ or V _ = +10V,
Ω
ON
NC
MAX453
I
_ = 1mA
COM
+25°C
C, E
M
COM_ -NO_ On-Resistance
Match Between Channels
(Note 4)
V+ = +12V,
V
NO
_ or V _ = +10V,
Ω
∆R
20
NC
ON
I
_ = 1mA
COM
30
+25°C
C, E
M
-0.5
-10
0.01
0.01
0.5
10
V+ = +12V,
= +10V, +1V,
NO_ or NC_ Off-Leakage
Current (Notes 5, 9)
I
NO_(OFF),
V
COM_
nA
nA
I
NC_(OFF)
V
NO_
or V
= +1V, +10V
NC_
-200
-0.5
-20
200
0.5
20
+25°C
C, E
M
V+ = +12V,
V = +10V,
COM_
COM_ On-Leakage Current
(Notes 5, 9)
I
COM_(ON)
V
NO_
or V
= +10V or floating
NC_
-400
400
FAULT
Applies with power on
Applies with power off
+25°C
+25°C
+25°C
C, E
M
-25
-40
+25
+40
10
Fault-Protected Analog Signal
Range (Note 2)
V
, V
V
NO_ NC_
-10
V
NO_
or V
= ±25V,
NC_
nA
µA
nA
µA
nA
µA
mA
COM_ Output Leakage Current,
Supply On (Note 9)
I
V+ = +12V,
no connection to “ON” channel
-200
-10
200
10
COM_
+25°C
C, E
M
-20
20
V
NO_
or V
= ±25V,
NC_
NO_ or NC_ Off Input Leakage
Current, Supply On (Note 9)
I
I
V
COM_
= 0,
-200
-10
200
10
NO_, NC_
V+ = +12V
or V
+25°C
C, E
M
-20
0.1
20
NO_ or NC_ Input Leakage
Current, Supply Off (Note 9)
V
NO_
= ±40V,
NC_
I
I
-200
-10
200
10
NO_, NC_
V+ = 0, V- = 0
COM_ On-Clamp Output
Current, Supply On
V
or V
= ±25V,
= ±25V,
NO_
NC_
I
+25°C
+25°C
2
3
5
5
COM_
V+ = +12V
COM_ On-Clamp Output
Resistance, Supply On
V
NO_
or V
NC_
R
2.4
kΩ
COM_
V+ = +12V
LOGIC INPUT
IN_ Input Logic Threshold High
IN_ Input Logic Threshold Low
V
C, E, M
C, E, M
+25°C
2.4
V
V
IN_H
V
IN_L
0.8
1
-1
-5
0.03
IN_ Input Current Logic High or
Low
I
I
V
IN_
= +0.8V or +2.4V
µA
IN_H, IN_L
C, E, M
5
4
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
MAX453
ELECTRICAL CHARACTERISTICS—Single Supply (continued)
(V+ = +12V, V- = 0, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 3)
MAX A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
T
MIN
TYP
200
100
MAX
UNITS
A
SWITCH DYNAMIC CHARACTERISTICS
+25°C
C, E, M
+25°C
500
1000
300
V
= +10V,
= 2kΩ; Figure 2
COM_
Turn-On Time
t
ns
ns
ON
R
L
V
COM_
= +10V,
= 2kΩ; Figure 2
Turn-Off Time
t
OFF
R
L
C, E, M
900
V
= +10V,
= 1kΩ; Figure 3
COM_
Break-Before-Make Time Delay
Charge Injection
t
+25°C
+25°C
5
100
2
ns
BBM
R
L
C
= 100pF,
L
Q
pC
V
COM_
= 0; Figure 4
NO_ or NC_ Off-Capacitance
COM_ On-Capacitance
C
f = 1MHz; Figure 5
f = 1MHz; Figure 5
+25°C
+25°C
5
pF
pF
N_(OFF)
C
15
COM_(ON)
R
= 50Ω, C = 15pF,
L
L
Off-Isolation (Note 7)
V
V
= 1V , f = 1MHz;
RMS
+25°C
+25°C
-62
-65
dB
dB
ISO
NO_
Figure 6
R
= 50Ω, C = 15pF,
L
L
Channel-to-Channel Crosstalk
(Note 8)
V
V
= 1V
, f = 1MHz;
CT
NO_
RMS
Figure 6
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
350
550
200
350
350
550
All V = 0 or +5V,
IN_
V+ Supply Current
µA
V
NO_
= V
= 0
NC_
All V = 0 or +12V,
IN_
µA
µA
V
NO_
= V
= 0
NC_
V- and GND Supply Current
I
GND
All V = 0 or +5V,
IN_
V
NO_
= V
= 0
NC_
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 = 20log10(V
/ V
NO_
), V
= output, V
= input to off switch.
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.
_______________________________________________________________________________________
5
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V+ = +15V, V- = -15V, T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. V
ON-RESISTANCE vs. V
ON-RESISTANCE vs. V
AND
COM
COM
COM
(DUAL SUPPLIES)
(SINGLE SUPPLY)
TEMPERATURE (DUAL SUPPLIES)
400
350
300
250
200
150
100
50
250
225
200
175
150
125
100
75
390
360
330
300
270
240
210
V+ = +9V
V± = ±4.5V
T = +125°C
A
T = +85°C
A
MAX453
V+ = +12V
V+ = +15V
V+ = +20V
T = +70°C
A
V± = ±10V
V± = ±12V
T = +25°C
A
V+ = +25V
180
150
120
90
V+ = +30V
T = 0°C
A
50
V± = ±15V
V± = ±18V
V+ = +36V
V- = 0
T = -40°C
A
60
V+ = +15V
V- = -15V
T = -55°C
A
25
30
0
0
0
-18 -15 -12 -9 -6 -3
V
0
3
6
9
12 15 18
0
5
10 15 20 25 30 35 40
(V)
-15
-10
-5
0
5
10
15
(V)
V
COM
(V)
COM
V
COM
ON-RESISTANCE vs. V
TEMPERATURE (SINGLE SUPPLY)
AND
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
COM
CHARGE INJECTION vs. V
COM
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
450
400
350
300
250
200
150
100
50
1000
100
T = +125°C
A
I
(V+ = +15V, V- = -15V)
COM_ON
T = +85°C
A
I
(V+ = +12V, V- = 0)
COM_ON
T = +70°C
A
10
I
(V+ = +15V, V- = -15V)
NC_OFF
1
DUAL SUPPLIES
SINGLE SUPPLY
T = +25°C
A
0.1
T = 0°C
A
0.01
0.001
0.0001
T = -40°C
A
T = -55°C
A
I
(V+ = +12V, V- = 0)
V+ = +12V
V- = 0
NC_OFF
0
0
2
4
6
8
10
12
-55 -35 -15
5
25 45 65 85 105 125
-15
-10
-5
0
5
10
15
TEMPERATURE (°C)
V
COM
(V)
V
COM
(V)
TURN-ON/TURN-OFF TIME vs.
TURN-ON/TURN-OFF TIME vs.
TURN-ON/TURN-OFF TIME vs.
SUPPLY VOLTAGE (DUAL SUPPLIES)
SUPPLY VOLTAGE (SINGLE SUPPLY)
TEMPERATURE (DUAL SUPPLIES)
200
180
160
140
120
100
80
600
500
400
300
200
100
0
250
200
150
100
50
t
ON
t
ON
t
ON
t
OFF
t
OFF
t
OFF
60
40
V+ = +15V
V- = -15V
20
0
0
±4
±6
±8 ±10 ±12 ±14 ±16 ±18
SUPPLY VOLTAGE (V)
8
12
16
20
24
28
32
36
-55 -35 -15
5
25 45 65 85 105 125
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
6
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
MAX453
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, T = +25°C, unless otherwise noted.)
A
POWER-SUPPLY CURRENT vs.
TEMPERATURE (DUAL SUPPLIES, V = 0)
IN
TURN-ON/TURN-OFF TIME vs.
TEMPERATURE (SINGLE SUPPLY)
POWER-SUPPLY CURRENT vs.
TEMPERATURE (DUAL SUPPLIES, V = +5V)
IN
500
400
300
200
100
0
250
200
150
100
50
800
600
400
200
0
I+
I+
t
ON
I
GND
I
GND
t
OFF
-100
-200
-300
-400
-500
I-
-200
-400
-600
I-
V+ = +15V
V- = -15V
V+ = +12V
V- = 0
V+ = +15V
V- = -15V
0
-55 -35 -15
5
25 45 65 85 105 125
-55 -35 -15
5
25 45 65 85 105 125
-55 -35 -15
5
25 45 65 85 105 125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
LOGIC-LEVEL THRESHOLD
vs. SUPPLY VOLTAGE
POWER-SUPPLY CURRENT vs.
TEMPERATURE (SINGLE SUPPLY)
OVERVOLTAGE WITH ±25V INPUT
3.0
2.5
2.0
1.5
1.0
0.5
0
400
350
300
250
200
150
100
50
V+ = +12V
V- = 0
V = +5V
IN
NO_ or
NC_
(10V/div)
DUAL-SUPPLY
RANGE
OV
SINGLE-SUPPLY
RANGE
I+
COM_
(10V/div)
OV
I
GND
0
5µs/div
4
8
12 16 20 24 28 32 36
SUPPLY VOLTAGE (V)
-55 -35 -15
5
25 45 65 85 105 125
TEMPERATURE (°C)
FAULT RECOVERY TIME
FAULT-FREE SIGNAL WITH ±15V INPUT
NO_ or
NC_
(10V/div)
NO_ or
NC_
(10V/div)
OV
OV
COM_
(10V/div)
COM_
(10V/div)
OV
OV
2µs/div
5µs/div
_______________________________________________________________________________________
7
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
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, T = +25°C, unless otherwise noted.)
A
FREQUENCY RESPONSE
FREQUENCY RESPONSE
(SINGLE SUPPLY)
(DUAL SUPPLIES)
0
0
-10
-20
BANDWIDTH
-10
-20
BANDWIDTH
-30
-40
-30
-40
MAX453
-50
-60
-50
-60
OFF ISOLATION
OFF ISOLATION
CROSSTALK
CROSSTALK
-70
-70
-80
-80
-90
V+ = +15V
V- = -15V
-90
V+ = +12V
V- = 0
-100
-100
0.01
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
P in De s c rip t io n
PIN
NAME
FUNCTION
1, 10, 11, 20
IN1, IN2, IN3, IN4
NO1, NO2, NO3, NO4
Logic Control Digital Inputs
Normally Open Inputs*
2, 9, 12, 19
3, 8, 13, 18
COM1, COM2, COM3, COM4
Analog Switch Common Outputs*
Normally Closed Inputs*
4, 7, 14, 17
NC1, NC2, NC3, NC4
5
6
V-
GND
N.C.
V+
Negative Analog Supply Voltage Input
Digital Ground
15
16
No Connection. Not internally connected.
Positive Analog and Digital Supply-Voltage Input
*When the voltage on NO_ or NC_ does not exceed V+ or V-, NO_ (or NC_) and COM_ pins are bidirectional.
beyond the supply rails to be passed through the switch
to the COM_ terminal, allowing rail-to-rail signal opera-
tion. Third, when a signal on NC_ or NO_ exceeds the
supply rails by about 150mV (a fault condition), the volt-
age on COM_ is limited to the appropriate polarity sup-
p ly volta g e . Op e ra tion is id e ntic a l for b oth fa ult
polarities. The fault-protection extends to ±25V with
power on and ±40V with power off.
De t a ile d De s c rip t io n
The MAX4533 is a fault-protected analog switch with
special operation and construction. Traditional fault-pro-
tected switches are constructed using three-series
CMOS devices. This combination produces good fault
protection but fairly high on-resistance when the signals
are within about 3V of each supply rail. These series
devices are not capable of handling signals up to the
power-supply rails.
The MAX4533 has a parallel N-channel and P-channel
MOSFET switch configuration with input voltage sensors.
The simplified internal structure is shown in Figure 1. The
parallel N1 and P1 MOSFETs form the switch element.
N3 and P3 are sensor elements to sample the input volt-
age and compare it against the power-supply rails.
The MAX4533 differs considerably from traditional fault-
protected switches, with three advantages. First, it is
constructed with two parallel 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
8
_______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
MAX453
Fa u lt Co n d it io n
The MAX4533 protects devices connected to its output
(COM_) through its unique fault-protection circuitry.
When the input voltage is raised above either supply
rail, the internal sense and comparator circuitries (N3
-15V
COMPARATOR
N-CHANNEL
DRIVER
-V(-15V)
and N-channel driver or P3 and P-channel driver) dis-
connect the output (COM_) from the input (Figure 1).
-15V
N3
If the switch driven above the supply rail has an on
state, the clamp circuitries (N2 or P2) connect the out-
SENSE
SWITCH
N2
CLAMP
put to the appropriate supply rail. Table 1 summarizes
NC_
or
NO_
N1
OUTPUT COM_
P2
the MAX4533’s operation under normal and fault condi-
tions. Row 5 shows a negative fault condition when the
supplies are on. It shows that with supplies of ±15V, if
the input voltage is between -15V and -25V, the output
(COM_) clamps to the negative supply rail of -15V.
With this technique, the SPDT switch is capable of with-
standing a worse-case condition of opposite fault polar-
ities at its inputs.
INPUT
CLAMP
P1
P3
SENSE
SWITCH
+V(+15V)
P-CHANNEL
DRIVER
+15V
Tra n s ie n t Fa u lt Co n d it io n
When a fast rising or falling transient on NO_ (or NC_)
exceeds V+ or V-, the output (COM_) follows the input
(IN_) to the supply rail by only a few nanoseconds. This
delay is due to the switch on-resistance and circuit
capacitance to ground. However, when the input tran-
sient returns to within the supply rails there is a longer
recovery time. For positive faults, the recovery time is
typically 2.5µs. For negative faults, the recovery time is
typically 1.3µs. These values depend on the COM_ out-
put resistance and capacitance. The delays are not
dependent 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.
COMPARATOR
+15V
Figure 1. Simplified Internal Structure
During normal operation of a conducting channel, N1
and P1 remain on with a typical 125Ω on-resistance
between NO_ (or NC_) and COM_. If the input voltage
exceeds either supply rail by about 150mV, the parallel
combination switches (N1, P1) are forced off through
the driver and sensing circuitries. At the same time, the
output (COM_ ) is clamped to the appropriate supply
rail by the clamp circuitries (N2, P2). Two clamp circuits
limit the output voltage to the supply voltages.
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_ or NC_ pins is
±40V from ground when the power is off. With ±15V sup-
ply voltages, the highest voltage on NO_ (or NC_) can
be +25V, and the lowest voltage on NO_ (or NC_) can
be -25V. Exceeding these limits can damage the chip.
For simplicity, Figure 1 shows only one side of the SPDT
switch configuration. The complete circuit is composed
of two channels with their outputs connected.
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- supply voltages.
When the signal on NO_ (or NC_ ) is between V+ and
V-, the switch behaves normally, with FETs N1 and P1
turning on and off in response to NO_ (or NC_) signals
(Figure 1). For any voltage between the supply rails,
the switch is bidirectional; therefore, COM_ and NC_
(or NO_ ) are interchangeable. Only NO_ and NC_ can
be exposed to overvoltages beyond the supply range
and within the specified breakdown limits of the device.
IN_ Lo g ic -Le ve l Th re s h o ld s
The logic-level thresholds are TTL/CMOS-compatible
when V+ is +15V. Raising V+ increases the threshold
slightly; when V+ reaches +25V, the level threshold is
2.8V—higher than the TTL output high-level minimum of
2.4V, but still compatible with CMOS outputs (see the
Typical Operating Characteristics).
Increasing V- has no effect on the logic-level thresh-
olds, but it does increase the gate-drive voltage to the
signal FETs, reducing their on-resistance.
_______________________________________________________________________________________
9
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
Table 1. Switch States in Normal and Fault Conditions
POWER
INPUT
SUPPLIES
(V+, V-)
NC_
NO_
OUTPUT
RANGE
On
On
On
On
On
On
Between Rails
On
Off
On
Off
On
Off
Off
On
Off
On
Off
On
NC_
NO_
V+
Between Rails
Between V+ and (+40V - V+)
Between V+ and (+40V - V+)
Between V- and (-40V - V-)
Between V- and (-40V - V-)
MAX453
V+
V-
V-
Follows the load
terminal voltage.
Off
Between Rails
Off
Off
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-.
Fa ilu re Mo d e s
The MAX4533 is not a lightning arrester or surge pro-
tector. Exceeding the fault-protection voltage limits on
NO_ or NC_, even for very short periods, can cause the
device to fail.
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
+12V or -15V to +15V, the supply current reduces to
approximately half of the supply current when the logic
input levels are at 0 to 5V.
Ap p lic a t io n s In fo rm a t io n
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.
P o w e r S u p p lie s
The MAX4533 operates with bipolar supplies between
±4.5V and ±18V. The V+ and V- supplies need not be
symmetrical, but their difference can not exceed the
absolute maximum rating of +44V. The MAX4533 oper-
ates from a single supply between +9V and +36V when
V- is connected to GND.
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 switches. This
Te s t Circ u it s /Tim in g Dia g ra m s
t
t
< 20ns
< 20ns
R
F
MAX4533
NC_
NO_
3V
0V
SWITCH OUTPUT
+10V
-10V
50%
50%
V
IN
COM_
t
ON
2kΩ
t
OFF
IN_
t
OPEN
+10V
0V
V+
GND
V-
50%
50%
LOGIC
INPUT
V
COM
50%
ON
50%
-10V
+15V
-15V
t
OFF
t
t
OPEN
(REPEAT TEST FOR IN2, IN3, AND IN4.)
Figure 2. Switching-Time Test Circuit
10 ______________________________________________________________________________________
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
MAX453
Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
+15V
+3V
0V
LOGIC
INPUT
V+
50%
MAX4533
V
NO
NC
O1
V
COM
COM_
IN_
R
C
L1
V
V
L1
O2
COM
V
O1
0.9V
O
R
L2
0V
SWITCH
OUTPUT V
C
L2
GND
V-
LOGIC
INPUT
COM
V
0.9V
O
O2
-15V
R = 1000Ω
C = 35pF
L
0V
L
SWITCH
OUTPUT
t
t
D
D
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
LOGIC 0 INPUT.
Figure 3. Break-Before-Make
V+
V+
V+
V
IN_
V
COM_
IN_
V
IN_
0V
50Ω
MAX4533
∆ V
OUT
V
OUT
NC_ OR NO_
V
OUT
C
L
GND
V-
100pF
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
Figure 4. Charge Injection
V+
V+
NO_
NC_
V+
MAX4533
GND
1MHz
COM_
IN_
CAPACITANCE
ANALYZER
ADDRESS SELECT
V-
V-
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 5. COM_, NO_, NC_ Capacitance
______________________________________________________________________________________ 11
Qu a d , Ra il-t o -Ra il, Fa u lt -P ro t e c t e d ,
S P DT An a lo g S w it c h
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
OFF ISOLATION = 20 log
ON LOSS = 20 log
COM_
V
MAX453
OUT
MAX4533
V
IN
V
V
V
OUT
OUT
CROSSTALK = 20 log
MEAS.
REF.
IN_
ADDRESS SELECT
NO_, NC_
V-
IN
GND
50Ω
50Ω
10nF
V-
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS 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
Ord e rin g In fo rm a t io n (c o n t in u e d )
Ch ip In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
20 Plastic DIP
20 SSOP
TRANSISTOR COUNT: 448
MAX4533CPP
MAX4533EAP
MAX4533ESP
MAX4533EPP
MAX4533MJP
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
20 Wide SO
20 Plastic DIP
20 CERDIP
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 ____________________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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