Maxim MAX4535CPD Fault-protected, high-voltage, single 4-to-1/dual 2-to-1 multiplexer Datasheet

19-1609; Rev 2; 5/05
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
The MAX4534 (single 4-to-1) and MAX4535 (dual 2-to1) fault-protected multiplexers operate with ±4.5V to
±20V dual supplies or a +9V to +36V single supply.
These multiplexers feature fault-protected inputs, railto-rail signal-handling capability, and overvoltage
clamping at 150mV beyond the rails. Both parts feature
±40V overvoltage protection with supplies off and ±25V
protection with supplies on. On-resistance is 400Ω max
and is matched between channels to 10Ω max. All digital inputs have TTL logic thresholds, ensuring
TTL/CMOS-logic compatibility when using a single
+12V or dual ±15V supplies.
Applications
Features
♦ ±40V Fault Protection with Power Off
±25V Fault Protection with ±15V Supplies
♦ No Power-Supply Sequencing Required
♦ All Channels Off with Power Off
♦ Rail-to-Rail Signal Handling
♦ Output Clamped to Appropriate Supply Voltage
During Fault Condition
♦ 1.0kΩ typ Output Clamp Resistance During
Overvoltage
♦ 400Ω max On-Resistance
Data-Acquisition Systems
♦ 20ns typ Fault Response Time
Industrial and Process Control
Avionics
♦ ±4.5V to ±20V Dual Supplies
+9V to +36V Single Supply
Signal Routing
♦ TTL/CMOS-Compatible Logic Inputs
Redundant/Backup Systems
Pin Configurations
TOP VIEW
MAX4534
A0 1
14 A1
13 GND
EN 2
V- 3
LOGIC
12 V+
NO1 4
11 NO3
NO2 5
10 NO4
N.C. 6
9
N.C.
COM 7
8
N.C.
TSSOP/SO/DIP
Ordering Information
PART
TEMP RANGE
MAX4534CUD
0°C to +70°C
MAX4534CSD
MAX4534CPD
MAX4534EUD
MAX4534ESD
MAX4534EPD
MAX4535CUD
MAX4535CSD
MAX4535CPD
MAX4535EUD
MAX4535ESD
MAX4535EPD
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
0°C to +70°C
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
PIN-PACKAGE
14 TSSOP
14 Narrow SO
14 Plastic DIP
14 TSSOP
14 Narrow SO
14 Plastic DIP
14 TSSOP
14 Narrow SO
14 Plastic SO
14 TSSOP
14 Narrow SO
14 Plastic DIP
MAX4535
A0 1
14 N.C.
13 GND
EN 2
V- 3
LOGIC
12 V+
NO1A 4
11 NO1B
NO2A 5
10 NO2B
N.C. 6
9 N.C.
COMA 7
8 COMB
TSSOP/SO/DIP
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX4534/MAX4535
General Description
MAX4534/MAX4535
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V+ ...........................................................................-0.3V to +44V
V- ............................................................................-44V to +0.3V
V+ to V-...................................................................-0.3V to +44V
COM_, A_, EN (Note 1)........................ (V- - 0.3V) to (V+ + 0.3V)
NO_ (Note 2)...........................................(V+ - 40V) to (V- + 40V)
NO_ to COM_ (Note 2) ............................................-40V to +40V
NO_ Overvoltage with Switch Power On (Note 2). ..-36V to +36V
NO_ Overvoltage with Switch Power Off (Note 2). ..-40V to +40V
Continuous Current into Any Terminal..............................±30mA
Peak Current Into Any Terminal
(pulsed at 1ms, 10% duty cycle).................................±100mA
Continuous Power Dissipation (TA = +70°C)
14-Pin TSSOP (derate 6.3mW/°C above +70°C) ..........500mW
14-Pin Narrow SO (derate 8mW/°C above +70°C) .......640mW
14-Pin Plastic DIP (derate 10mW/°C above +70°C) .....800mW
Operating Temperature Ranges
MAX453_C_D.......................................................0°C to +70°C
MAX453_E_D ....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: COM_, EN, and A_ pins are not fault protected. Signals on COM_, EN, or A_ exceeding V+ or V- are clamped by internal
diodes. Limit forward diode current to maximum current rating.
Note 2: NO_ pins are fault-protected. Signals on NO_ exceeding -25V to +25V may damage the device during power-on conditions.
When the power is off the maximum voltage range is -40V to +40V.
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, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
V+
V
275
400
ANALOG SWITCH
Fault-Free Analog Signal Range
On-Resistance
On-Resistance Match Between
Channels (Note 4)
NO_ Off-Leakage Current
(Note 5)
VNO_
RON
VCOM_ = ±10V, INO_ = 1mA
∆RON
VCOM_ = ±10V, INO_ = 1mA
INO_(OFF)
–
VNO_ = ±10V, VCOM_ = +10V
MAX4534
COM_ Off-Leakage Current
(Note 5)
ICOM_(OFF)
VCOM_ = ±10V,
–
VNO_ = +10V
MAX4535
ICOM_(ON)
+25°C
500
C, E
2
+25°C
10
15
C, E
+25°C
-0.5
C, E
-5
+25°C
-2
C, E
-60
+25°C
-1
C, E
-30
0.01
0.5
5
0.05
Ω
nA
2
60
0.05
Ω
1
nA
30
+25°C
-2
C, E
-80
+25°C
-1
C, E
-40
40
Applies with power on
-25
+25
Applies with power off
-40
+40
+25°C
-20
20
nA
C, E
-1
1
µA
MAX4534
COM_ On-Leakage Current
(Note 5)
V-
Applies with power on or off
VCOM_ = ±10V,
VNO_ = floating
MAX4535
0.1
2
80
0.1
1
nA
FAULT PROTECTION
Fault-Protected Analog Signal
Range (Note 6)
VNO_
COM_ Output Leakage Current,
Supplies On
ICOM_
2
VNO_ = ±25V, VEN = 0, VCOM_ = 0
_______________________________________________________________________________________
V
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
(V+ = +15V, V- = -15V, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
NO_ Input Leakage Current,
Supplies On
INO_
–
VNO_= ±25V, VCOM_ = +10V,
VEN = 0
NO_ Input Leakage Current,
Supplies Off
INO_
VNO_= ±40V, VCOM_ = 0,
V+ = 0, V- = 0
COM_ On Clamp Output
Current, Supplies On
ICOM_
COM_ On Clamp Output
Resistance, Supplies On
RCOM_
VNO_ = +25V VCOM_ = 0
VNO_ = -25V VCOM_ = 0
VNO_ = ±25V
± Fault Response Time
RL = 10kΩ, VNO_ = ±25V
± Fault Recovery Time
RL = 10kΩ, VNO_ = ±25V
Fault Trip Threshold
RL = 1kΩ
TA
MIN
+25°C
-20
TYP
MAX
20
C, E
-200
200
+25°C
-20
20
nA
C, E
-5
5
µA
7
10
13
-13
-11
-7
+25°C
0.1
1.0
2.5
C, E
0.08
+25°C
3
20
nA
mA
kΩ
ns
2.5
V- - 400
UNITS
µs
V+ + 400
mV
LOGIC INPUT
Input Logic Voltage High
VA_H,
VENH
Input Logic Voltage Low
VA_L,
VENL
Input Logic Current
IA_, IEN
2.4
VA_ = VEN = 0.8V or 2.4V
V
-1
0.8
V
1
µA
SWITCH DYNAMIC CHARACTERISTICS
Enable Turn-On Time
tON
VNO_ = ±10V, RL = 1kΩ,
Figure 3
+25°C
Enable Turn-Off Time
tOFF
VNO_ = ±10V, RL = 1kΩ,
Figure 3
+25°C
Transition Time
tTRANS
Break-Before-Make Time Delay
Charge Injection
(Note 7)
tBBM
Q
135
C, E
60
C, E
130
C, E
VNO_ = ±10V, RL = 1kΩ,
Figure 4
CL = 1nF, VNO_ = 0, RS = 0,
Figure 5
200
250
+25°C
Figure 2
275
400
350
500
10
60
1
ns
ns
ns
ns
10
pC
Off-Isolation
(Note 8)
VISO
RL = 50Ω, VNO_ = 1VRMS,
f = 1MHz, Figure 6
-62
dB
Channel-to-Channel Crosstalk
(Note 9)
VCT
RL = 50Ω, VNO_ = 1VRMS,
f = 1MHz, Figure 7
-53
dB
5
pF
NO_ Off-Capacitance
CNO_(OFF) f = 1MHz, Figure 8
COM_ Off-Capacitance
CCOM_(OFF)
f = 1MHz,
Figure 8
MAX4534
6.5
MAX4535
4
COM_ On-Capacitance
CCOM_(ON)
f = 1MHz,
Figure 8
MAX4534
13.5
MAX4535
10.5
pF
pF
_______________________________________________________________________________________
3
MAX4534/MAX4535
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
MAX4534/MAX4535
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
±20
V
POWER SUPPLY
Power-Supply Range
V+, V-
±4.5
All VA_ = VEN = 0 or 5V
V+ Supply Current
I+
All VA_ = VEN = 0 or 15V
V- Supply Current
I-
All VA_ = VEN = 0, 5V, or 15V
All VA_ = VEN = 0 or 15V
GND Supply Current
IGND
All VA_ = VEN = 5V
+25°C
225
C, E
400
600
+25°C
125
C, E
200
µA
300
+25°C
125
C, E
200
300
+25°C
0.01
1
100
200
C, E
10
+25°C
C, E
µA
µA
300
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, TA = TMIN to TMIN, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
Fault-Free Analog Signal Range
VNO_
On-Resistance
On-Resistance Match Between
Channels (Note 5)
CONDITIONS
RON
VCOM_ = 10V, INO_ = 500µA
∆RON
VCOM_ = 10V, INO_ = 500µA
INO_(OFF)
COM_ Off-Leakage Current
(Notes 5, 10)
VCOM_ = 10V,
ICOM_(OFF) 1V;
VNO_ = 1V,10V
4
VCOM_ = 10V, 1V;
VNO_ = 1V, 10V
VCOM_ = 10V,
1V;
ICOM_(ON)
VNO_ = 10V,
1V, or floating
MAX4534
MAX4535
MAX4534
MAX4535
MIN
TYP
MAX
UNITS
V+
V
650
950
0
Applies with power on or off
NO_ Off-Leakage Current
(Notes 5, 10)
COM_ On-Leakage Current
(Notes 5, 10)
TA
+25°C
1100
C, E
10
+25°C
25
40
C, E
+25°C
-0.5
C, E
-10
0.01
0.5
10
+25°C
-2
2
C, E
-60
60
+25°C
-1
1
C, E
-30
30
+25°C
-2
2
C, E
-80
80
+25°C
-1
1
C, E
-40
40
_______________________________________________________________________________________
Ω
Ω
nA
nA
nA
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
(V+ = +12V, V- = 0, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, TA = TMIN to TMIN, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
FAULT PROTECTION
Fault-Protected Analog Signal
Range (Note 6)
VNO_
COM_ Output Leakage Current,
Supply On
ICOM_
Applies with all power on
Applies with all power off
VNO_ = ±25V,
VCOM = 0
NO_ Input Leakage Current,
Supply On
INO_
VNO_ = ±25V, VCOM_ = 0,
NO_ Input Leakage Current,
Supply Off
INO_
VNO_= ±40V, V+ = 0
+25°C
+25°C
25
-40
40
-20
20
nA
V
C, E
-1
1
µA
+25°C
-20
20
nA
C, E
-5
5
µA
+25°C
-20
20
nA
C, E
-5
5
µA
2
3
5
nA
2.4
6
kΩ
COM_ ON Output Current,
Supply On
ICOM_
VNO_ = 25V
+25°C
COM_ ON Output Resistance,
Supply On
RCOM_
VNO_ = 25V
+25°C
Fault Trip Threshold
-25
RL = 1kΩ
0.1
V- - 400
V+ + 400
mV
LOGIC INPUT
Input Logic Voltage High
ANALOG SWITCH
Input Logic Voltage Low
Input Logic Current
VA_H,
VENH
2.4
V
VA_L,
VENL
IA_, IEN
VA_ = VEN = 0.8V or 2.4V
-1
0.8
V
1
µA
SWITCH DYNAMIC CHARACTERISTICS
Enable Turn-On Time
tON
VCOM_ = 10V, RL = 2kΩ,
Figure 3
+25°C
Enable Turn-Off Time
tOFF
VCOM_ = 10V, RL = 2kΩ,
Figure 3
+25°C
Break-Before-Make Time Delay
tBBM
VCOM_ = 10V, RL = 2kΩ,
Figure 4
+25°C
CL = 1nF, VNO_ = 0, RS = 0,
Figure 5
+25°C
Charge Injection (Note 7)
Q
220
C, E
500
700
100
C, E
250
350
50
100
2
ns
ns
ns
10
pC
Off-Isolation (Note 8)
VISO
RL = 50Ω, VNO_ = 1VRMS,
f = 1MHz, Figure 6
-62
dB
Channel-to-Channel Crosstalk
(Note 9)
VCT
RL = 50Ω, VNO_ = 1VRMS,
f = 1MHz, Figure 7
-65
dB
_______________________________________________________________________________________
5
MAX4534/MAX4535
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
(V+ = +12V, V- = 0, VA_H = VENH = 2.4V, VA_L = VENL = 0.8V, TA = TMIN to TMIN, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
36
V
75
150
POWER SUPPLY
Power-Supply Range
V+
9
+25°C
All VA__ = VEN = 0 or 12V
V+ Supply Current
C, E
I+
250
+25°C
All VA__ = VEN = 5V
150
µA
275
C, E
µA
375
Algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
∆RON = RON(MAX) - RON(MIN).
Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at TA = 25°C.
NO_ pins are fault protected, and COM_ pins are not fault protected. The max input voltage, on NO_ pins, depends upon
the COM_ load configuration. Generally, the max input voltage is ±25V, with ±15V supplies, and a load referred to ground.
For more detailed information, see the NO_ Input Voltage section.
Note 7: Guaranteed by design.
Note 8: Off-isolation = 20 log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.
Note 9: Between any two analog inputs.
Note 10: Leakage testing for single-supply operation is guaranteed by testing with dual supplies.
Note 3:
Note 4:
Note 5:
Note 6:
Typical Operating Characteristics
(V+ = +15V, V- = -15V, TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs.
VCOM (SINGLE SUPPLY)
V+ = +4.5V
V- = -4.5V
800
V+ = +9V
1000
600
900
V+ = +15V
V- = -15V
500
+125°C
800
V+ = +10V
V- = -10V
RON (Ω)
600
V+ = +15V
V- = -15V
500
V+ = +12V
V+ = +15V
700
400
600
V+ = +20V
500
300
200
200
V+ = +20V
V- = -20V
100
+25°C
-40°C
-15
-10
-5
0
VCOM (V)
5
10
15
20
-55°C
100
V+ = +36V
0
0
-20
+70°C
200
100
0
300
V+ = +30V
400
300
+85°C
400
RON (Ω)
700
6
1100
MAX4534 toc02
900
MAX4534 toc01
1000
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (DUAL SUPPLIES)
MAX4534 toc03
ON-RESISTANCE vs.
VCOM (DUAL SUPPLIES)
RON (Ω)
MAX4534/MAX4535
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
0
5
10
15
20
VCOM (V)
25
30
35
40
-15
-10
-5
0
VCOM (V)
_______________________________________________________________________________________
5
10
15
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
10n
+25°C
500
-40°C
2
ICOM_ON
1n
ICOM_OFF
100p
400
-55°C
300
10p
-1
1p
V+ = +12V
V- = 0
100
0
INO_OFF
200
0
2
4
6
8
VCOM (V)
10
12
14
-3
-55
ENABLE ON/OFF-TIMES vs.
SUPPLY VOLTAGE (DUAL SUPPLIES)
-5
20
45
70
95
120 145
150
100
200
50
0
0
±4
±6
±8
±10 ±12 ±14 ±16 ±18 ±20
tON
120
100
80
tOFF
60
tON
40
tOFF
20
0
0
5
10
15
20
25
30
35
-40
-20
0
20
40
60
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
POWER-SUPPLY CURRENT vs.
TEMPERATURE (VAO = VA1 = VEN = 0)
POWER-SUPPLY CURRENT vs.
TEMPERATURE (VAO = VA1 = VEN = 5V)
POWER-SUPPLY CURRENT
vs. LOGIC VOLTAGE (VA_, VEN)
I+
300
50
I+, I-, IGND (µA)
100
IGND
0
-50
-100
I-
-150
I+
200
100
0
0
20
40
TEMPERATURE (°C)
60
80
I+
50
I-
0
-300
-20
150
IGND
-200
-250
200
100
-100
-200
-40
V+ = 12V
V- = 0
250
+I, -I, GND (µA)
150
400
80
300
MAX4534 toc11
500
MAX4534 toc10
200
15
160
100
250
I+, I-, IGND (µA)
250
50
10
180
140
300
150
tOFF
5
200
tON, tOFF (ns)
tON
0
ENABLE ON/OFF-TIMES
vs. TEMPERATURE
400
tON, tOFF (ns)
tON, tOFF (ns)
200
-5
ENABLE ON/OFF-TIMES vs.
SUPPLY VOLTAGE (SINGLE SUPPLY)
350
250
-10
VNO (V)
450
300
-15
TEMPERATURE (°C)
MAX4534 toc08
350
-30
500
MAX4534 toc07
400
V+ = 12V
V- = 0
-2
0.1p
0
V+ = +15V
V- = -15V
1
MAX4534 toc09
LEAKAGE (A)
+70°C
600
3
Q (pC)
700
MAX4534 toc6
100n
+85°C
4
MAX4508/09toc05
+125°C
800
RON (Ω)
1µ
MAX4534 toc04
1000
900
CHARGE INJECTION vs. VNO
(DUAL AND SINGLE SUPPLIES)
LEAKAGE CURRENT vs. TEMPERATURE
MAX4534 toc12
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (SINGLE SUPPLY)
-40
-20
0
20
40
TEMPERATURE (°C)
60
80
0
2
4
6
8
10
12
14
VA_, VEN (V)
_______________________________________________________________________________________
7
MAX4534/MAX4535
Typical Operating Characteristics (continued)
(V+ = +15V, V- = -15V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(V+ = +15V, V- = -15V, TA = +25°C, unless otherwise noted.)
LOGIC-LEVEL THRESHOLD
vs. SUPPLY VOLTAGE
FREQUENCY RESPONSE
BANDWIDTH
-10
300
-30
LOSS (dB)
I+
200
100
IGND
0
-100
-50
CROSSTALK
-70
I-
OFF-ISOLATION
-90
-250
2
4
6
8
10
12
14
DUAL
SUPPLIES
2.0
SINGLE
SUPPLY
1.5
1.0
0
0.01
0.1
1
10
100
FREQUENCY (MHz)
VA_, VEN (V)
FAULT-FREE SIGNAL PERFORMANCE
IN_
0
5
10
15
20
+25V
IN_
0
10V/div
-15V
0
+15V
+15V
COM_
-25V
0
0
10V/div
0
COM_
-15V
-15V
5µs/div
FAULT-FREE RAIL-TO-RAIL SIGNAL HANDLING
WITH ±15V SUPPLIES
8
25
SUPPLY VOLTAGE (V)
INPUT OVERVOLTAGE vs. OUTPUT CLAMPING
MAX4534toc16
+15V
1000
MAX4534toc17
0
V- = 0
2.5
0.5
-110
-300
3.0
LOGIC-LEVEL THRESHOLD (V)
400
MAX4534 toc14
10
MAX4534 toc13
500
MAX4534toc15
POWER-SUPPLY CURRENT
vs. LOGIC VOLTAGE (VA_, VEN)
+I, -I, GND (µA)
MAX4534/MAX4535
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
5µs/div
±25V OVERVOLTAGE INPUT WITH THE OUTPUT
CLAMPED AT ±15V
_______________________________________________________________________________________
30
35
40
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
MAX4534 (Single 4-to-1 Mux)
PIN
NAME
MAX4535 (Dual 2-to-1 Mux)
PIN
FUNCTION
NAME
FUNCTION
1
A0
Address Bit 0
1
A0
Address Bit 0
2
EN
Enable Input
2
EN
Enable Input
3
V-
Negative Supply Voltage
3
V-
Negative Supply Voltage
4
NO1
Channel Input 1 (fault protected)
4
NO1A
Channel Input 1A (fault protected)
5
NO2
Channel Input 2 (fault protected)
5
NO2A
Channel Input 2A (fault protected)
6, 8, 9
N.C.
No connection
6, 9, 14
N.C.
No connection
7
COM
Analog Output
7
COMA
Mux Output A
10
NO4
Channel Input 4 (fault protected)
8
COMB
Mux Output B
11
NO3
Channel Input 3 (fault protected)
10
NO2B
Channel Input 2B (fault protected)
12
V+
Positive Supply Voltage
11
NO1B
Channel Input 1B (fault protected)
13
GND
Ground
12
V+
14
A1
Address Bit 1
13
GND
Truth Tables
MAX4534 (Single 4-to-1 Mux)
A1
A0
EN
ON SWITCH
X
X
0
None
0
0
1
NO1
0
1
1
NO2
1
0
1
NO3
1
1
1
NO4
X = Don’t care; logic 0: VAL ≤ +0.8; logic 1: VAH ≥ +2.4V
MAX4535 (Dual 2-to-1 Mux)
A0
EN
COMA
COMB
X
0
None
None
0
1
NO1A
NO1B
1
1
NO2A
NO2B
X = Don’t care; logic 0: VAL ≤ +0.8; logic 1: VAH ≥ +2.4V
Detailed Description
The MAX4534/MAX4535 differ considerably from traditional fault-protected multiplexers, offering several
advantages. First, they are constructed with two parallel 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-
Positive Supply Voltage
Ground
to-rail signal operation. Third, when a signal on VNO_
exceeds the supply rails (i.e., a fault condition), the
voltage on COM_ is limited to the supply rails.
Operation is identical for both fault polarities.
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.
The COM_ pins are not fault-protected. If a voltage
source is connected 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, damaging the device (see Absolute
Maximum Ratings).
Figure 1 shows the internal construction, with the analog 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 Pchannel FET P1, which are driven on and off simultaneously, according to the input fault condition and the
logic level state.
.
_______________________________________________________________________________________
9
MAX4534/MAX4535
Pin Descriptions
MAX4534/MAX4535
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
NORMALLY OPEN SWITCH CONSTRUCTION
V+
P2
HIGH
FAULT
P1
NO_
COM_
N1
LOW
FAULT
ON
A_
MAX4534
MAX4535
GND
N2
VESD DIODE
Figure 1. Functional Diagram
NO_ Input Voltage
The maximum allowable input voltage for safe operation depends on whether supplies are on or off and on
the load configuration at the COM output. If COM is
referred to a voltage other than ground, but within the
supplies, VNO_ may range higher or lower than the
supplies, provided the absolute value of VNO_ VCOM_ is 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
±36V. If the supplies are off and the COM output is referenced to ground, the maximum NO_ voltage is ±40V.
Normal Operation
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
10
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.
Positive Fault Condition
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+.
Negative Fault Condition
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-.
______________________________________________________________________________________
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
Non-Fault-Protected Pins
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 30mA absolute maximum current
rating is never exceeded, both in normal and fault conditions.
The GND, COM_, EN, and A_ pins do not have fault
protection. Reverse ESD protection diodes are internally connected between GND, COM_, A_, EN, and both
V+ and V-. If a signal on GND, COM_, EN, 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-.
Applications Information
Ground
There is no connection between the analog signal
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 logiclevel translators convert the logic levels to switched V+
and V- signals to drive the gates of the channel
MOSFETs. This drive signal is the only connection
between the power supplies and the analog signals.
GND, A_, EN, and COM_ have ESD protection diodes
to V+ and V-.
Supply Current Reduction
When the logic signals are driven rail-to-rail from 0 to
+15V or -15V to +15V, the current consumption will be
reduced from 300µA (typ) to 180µA.
Power Supplies
The MAX4534/MAX4535 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.
The MAX4534/MAX4535 operate from single supplies
between +9V and +36V when V- is connected to GND.
Fault Protection Voltage and Power-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,
and the lowest voltage on NO_ can be V+ - 40V.
Caution: Exceeding these limits can damage the IC.
Logic-Level Thresholds
The logic-level thresholds are CMOS and TTL compatible with V+ = 4.5V to 16.5V.
______________________________________________________________________________________
11
MAX4534/MAX4535
Transient Fault Condition
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
capacitance to ground. When the input transient
returns to within the supply rails, however, there is a
longer output 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_ output resistance and capacitance. The
delays do not depend on the fault amplitude. Higher
COM_ output resistance and capacitance increase the
recovery times.
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
MAX4534/MAX4535
Test Circuits/Timing Diagrams
V+
V+
NO1
A1
+10V
NO2, NO3
A0
MAX4534
+5V
NO4
EN
-10V
COM
GND
VOUT
V-
35pF
LOGIC
INPUT
VA_
50%
0
RL
V-
VNO__
V+
V+
90%
SWITCH
OUTPUT
VOUT
+10V
NO1B
A0
tR < 20ns
tF < 20ns
+3V
90%
VNO__
NO1A, NO2A
+5V
EN
-10V
NO2B
MAX4535
GND
tTRANS
tTRANS
COMB
V-
ON
VOUT
35pF
RL
V-
Figure 2. Address Transition Time
V+
VEN
V+
EN
NO1
+10V
NO2–NO4
A0
A1
MAX4534
COM
GND
50Ω
VOUT
V-
35pF
RL
LOGIC
INPUT
VEN
V-
V+
EN
50%
0
tON(EN)
tOFF(EN)
10V
V+
VEN
tR < 20ns
tF < 20ns
+3V
NO1B
90%
SWITCH
OUTPUT
VOUT
+10V
NO1A, NO2A
NO2B, COMA
A0
0
MAX4535
50Ω
GND
COMB
V-
VOUT
RL
35pF
V-
Figure 3. Enable Switching Time
12
______________________________________________________________________________________
90%
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
V+
VEN
+3V
V+
EN
NO1–NO4
A0
+10V
tR < 20ns
tF < 20ns
+3V
LOGIC
INPUT
VA
50%
0
MAX4534
80%
A1
COM
GND
SWITCH
OUTPUT
VOUT
VOUT
V-
35pF
tOPEN
RL
50Ω
V-
Figure 4. MAX4534 Break-Before-Make Interval
V+
RS
V+
NO_
VEN
VS
MAX4534
A0
CHANNEL
SELECT
LOGIC
INPUT
VEN
EN
COM
+3V
ON
OFF
ON
0
VOUT
A1
GND
CL
1nF
V-
∆VOUT
VOUT
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR VCTE WHEN THE CHANNEL TURNS OFF.
VQ = ∆VOUT CL
Figure 5. Charge Injection
V+
NO1
VIN
RS = 50Ω
V+
10nF
NO1
V+
NO4
R
1k
MAX4534
COM
A0
VIN
VOUT
V+
NO2
NO4
MAX4534
A0
COM
VOUT
RS = 50Ω
A1
GND
EN
V-
RL
50Ω
A1
GND EN
V-
RL
50Ω
10nF
10nF
V-
VOFF-ISOLATION = 20log
Figure 6. Off-Isolation
10nF
VOUT
VIN
CROSSTALK = 20log
VOUT
VIN
Figure 7. Crosstalk
______________________________________________________________________________________
13
MAX4534/MAX4535
Test Circuits/Timing Diagrams (continued)
MAX4534/MAX4535
Fault-Protected, High-Voltage,
Single 4-to-1/Dual 2-to-1 Multiplexers
Test Circuits/Timing Diagrams (continued)
V+
VNO_
V+
NO4
MAX4534
A0
GND
EN
VCOM_
NO1
A1
CHANNEL
SELECT
+25V
V-
+15V
1MHz
CAPACITANCE
ANALYZER
-15V
COM
-25V
V-
Figure 9. Transient Behavior of Fault Condition
Figure 8. NO_, COM_ Capacitance
___________________Chip Information
TRANSISTOR COUNT: 265
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.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
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