MAXIM MAX314F

19-2737; Rev 0; 1/03
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
The MAX312F/MAX313F/MAX314F are quad, singlepole/single-throw (SPST), fault-protected analog switches. They are pin compatible with the industry-standard
nonprotected MAX312/MAX313/MAX314. These switches feature fault-protected inputs and Rail-to-Rail signalhandling capability. All analog signal terminals are protected from overvoltage faults up to ±36V with power on
and up to ±40V with power off. During a fault condition,
the COM_, NO_, or NC_ terminal becomes an open circuit and only microamperes of leakage current flow from
the source. On-resistance is 10Ω (max) and is matched
between switches to 0.5Ω (max) at +25°C.
The MAX312F has four normally closed (NC) switches.
The MAX313F has four normally open (NO) switches.
The MAX314F has two NC and two NO switches. These
CMOS switches operate with dual power supplies ranging from ±4.5V to ±20V or a single supply between +9V
and +36V. All digital inputs have +0.8V and +2.4V logic
thresholds, ensuring both TTL and CMOS logic compatibility when using ±15V or a single +12V supply.
For supply voltages of ±5V, +5V, and +3V, refer to the
MAX4711/MAX4712/MAX4713 data sheet.
Features
♦ No Power-Supply Sequencing Required
♦ Rail-to-Rail Signal Handling
♦ All Switches Off with Power Off
♦ All Switches Off when V+ is Off and V- is On
♦ ±40V Fault Protection with Power Off
♦ ±36V Fault Protection with ±15V Supplies
♦ Control Line Fault Protection from
V- - 0.3V to V- + 40V
♦ Pin Compatible with Industry-Standard
DG411/DG412/DG413
♦ 600ns (typ) Fault Response Time
♦ 10Ω (max) RON with ±15V Supplies
♦ ±4.5V to ±20V Dual Supplies
♦ +9V to +36V Single Supply
♦ TTL- and CMOS-Compatible Logic Inputs with
±15V or Single +9V to +15V Supplies
Ordering Information
Applications
Communications Systems
Signal Routing
Test Equipment
PART
TEMP RANGE
PIN-PACKAGE
MAX312FESE
-40°C to +85°C
16 SO
MAX312FEPE
-40°C to +85°C
16 Plastic DIP
Ordering Information continued at end of data sheet.
Data Acquisition
Pin Configurations
Industrial and Process Control Systems
Avionics
TOP VIEW
Redundant/Backup Systems
ATE
Hot Swap
IN1
1
16 IN2
COM1
2
15 COM2
NC1
3
14 NC2
V-
4
GND
5
NC4
6
11 NC3
COM4
7
10 COM3
IN4
8
13 V+
MAX312F
12 N.C.
9
IN3
DIP/SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Functional Diagram appears at end of data sheet.
Pin Configurations continued at end of data sheet.
MAX312F
LOGIC
SWITCH
0
1
ON
OFF
N.C. = NOT CONNECTED. SWITCHES SHOWN FOR LOGIC 0 INPUT.
ALL SWITCHES ARE OFF WITH POWER REMOVED.
________________________________________________________________ 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
MAX312F/MAX313F/MAX314F
General Description
MAX312F/MAX313F/MAX314F
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND.)
V+ ...........................................................................-0.3V to +44V
V- ............................................................................-44V to +0.3V
V+ to V-...................................................................-0.3V to +44V
IN_ ......................................................... (V- - 0.3V) to (V- + 40V)
NO_, NC_ to COM_ (Note 1) .................................. -40V to +40V
COM_, NO_, NC_ Voltage with
Power On (Note 1).............................................. -36V to +36V
COM_, NO_, NC_ Voltage with
Power Off (Note 1).............................................. -40V to +40V
Peak Current COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle) ................................±300mA
Continuous Current (any other terminal).......................... ±30mA
Continuous Current (COM_, NO_, NC_).........................±100mA
Continuous Power Dissipation (TA = +70°C)
16-Pin SO (derate 8.7mW/°C above +70°C)................696mW
16-Pin Plastic DIP (derate 10.53mW/°C
above +70°C) ........................................................ 842mW
Operating Temperature Range .......................... -40°C to +85°C
Junction Temperature .................................................... +150°C
Storage Temperature Range ........................... -65°C to +160°C
Lead Temperature (soldering, 10s) ............................... +300°C
Note 1: COM_, NO_, and NC_ pins are fault protected. Signals on COM_, NO_, and NC_ exceeding -36V to +36V may damage the
device during power-on conditions. When the power is off, the maximum 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—±15V Dual Supplies
(V+ = +15V, V- = -15V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Fault-Free Analog Signal Range
On-Resistance
On-Resistance Match Between
Channels (Note 4)
VCOM_,
VNO_, VNC_
E
V-
+25°C
RON
ICOM_ = 10mA;
VNO_, VNC_ = ±10V
E
∆RON
ICOM_ = 10mA;
VNO_, VNC_ = ±10V
E
E
8
10
13
+25°C
0.05
0.5
0.75
+25°C
0.25
1
On-Resistance Flatness
(Note 5)
RFLAT(ON)
ICOM_ = 10mA;
VNO_, VNC_ = ±5V, 0V
NO_, NC_ Off-Leakage Current
(Note 6)
INO_(OFF),
INC_(OFF)
VCOM_ = ±10V;
VNO_, VNC_ = ±10V
+25°C
-1
+1
E
-60
+60
COM_ Off-Leakage Current
(Note 6)
ICOM_(OFF)
VCOM_ = ±10V;
VNO_, VNC_ = ±10V
+25°C
-1
+1
E
-60
+60
COM_ On-Leakage Current
(Note 6)
ICOM_(ON)
VCOM_ = ±10V;
VNO_, VNC_ = ±10V or floating
+25°C
-2
+2
E
-60
+60
V+ = +15V, V- = -15V
E
-36
+36
1.25
Ω
Ω
Ω
nA
nA
nA
FAULT
Fault-Protected Analog Signal
Range
VCOM_,
VNO_, VNC_
V+ = 0V, V- = -15V
E
-36
+36
V+ = V- = 0V
E
-40
+40
NO_ or NC_ Off-Leakage
Current (Note 6)
INO_(OFF),
INC_(OFF)
VNO_, VNC_ = ±36V; V+ = +15V,
0V; V- = -15V
+25°C
-1
+1
E
-10
+10
COM_ Off-Leakage Current
(Note 6)
ICOM_(OFF)
VCOM_ = ±36V; V+ = +15V, 0V;
V- = -15V
+25°C
-1
+1
E
-10
+10
2
_______________________________________________________________________________________
V
µA
µA
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
(V+ = +15V, V- = -15V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Notes 2, 3)
PARAMETER
NO_ or NC_ Leakage Current
(Note 6)
COM_ Leakage Current
(Note 6)
SYMBOL
INO_, INC_
ICOM_
CONDITIONS
VNO_, VNC_ = ±40V; V+ = V- = 0V
VCOM_ = ±40V; V+ = V- = 0V
Fault-Trip Threshold
TA
MIN
TYP
MAX
+25°C
-1
+1
E
-10
+10
+25°C
-1
+1
E
-10
+10
E
V- - 0.4
V+ + 0.4
UNITS
µA
µA
V
± Fault Response Time
tRES
VNO_, VNC_ = ±36V; RL = 300Ω
E
600
ns
± Fault Recovery Time
tREC
VNO_, VNC_ = ±36V; RL = 300Ω
E
1
µs
Turn-On Time
tON
VNO_ or VNC_ = ±10V, RL = 300Ω, +25°C
CL = 35pF, Figure 2
E
115
Turn-Off Time
tOFF
VNO_ or VNC_ = ±10V, RL = 300Ω, +25°C
CL = 35pF, Figure 2
E
70
Break-Before-Make Time Delay
(MAX314F Only) (Note 7)
tBBM
VNO_ or VNC_ = ±10V, RL = 100Ω, +25°C
CL = 10pF, Figure 3
E
SWITCH DYNAMICS
225
275
185
235
5
45
ns
ns
ns
2
VGEN = 0V, RGEN = 0Ω, CL = 1nF,
Figure 4
+25°C
70
pC
f = 1MHz, Figure 5
+25°C
20
pF
COM_ Off-Capacitance
CCOM_(OFF) f = 1MHz, Figure 5
+25°C
20
pF
COM_ On-Capacitance
CCOM_(ON)
f = 1MHz, Figure 5
+25°C
43
pF
Charge Injection
Q
NO_ or NC_ Off-Capacitance
CN_(OFF)
Off-Isolation (Note 8)
VISO
f = 1MHz, RL = 50Ω, CL = 15pF,
PIN = 0dBm, Figure 6
+25°C
-55
dB
Channel-to-Channel Crosstalk
(Note 9)
VCT
f = 1MHz, RL = 50Ω, CL = 15pF,
PIN = 0dBm, Figure 6
+25°C
-104
dB
LOGIC INPUT
Input Logic High
VIH
E
Input Logic Low
VIL
E
Input Leakage Current
IIN
VIN_ = 0V or V+
2.4
V
0.8
V
E
-1
+1
µA
E
±4.5
±20
V
POWER SUPPLY
Power-Supply Range
V+, VAll VIN_ = +5V, VCOM_ = 0V
V+ Supply Current
I+
All VIN_ = 0V or V+, VCOM_ = 0V
+25°C
340
E
+25°C
E
500
700
140
250
µA
350
_______________________________________________________________________________________
3
MAX312F/MAX313F/MAX314F
ELECTRICAL CHARACTERISTICS—±15V Dual Supplies (continued)
MAX312F/MAX313F/MAX314F
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
ELECTRICAL CHARACTERISTICS—±15V Dual Supplies (continued)
(V+ = +15V, V- = -15V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
All VIN_ = +5V, VCOM_ = 0V
V- Supply Current
IAll VIN_ = 0V or V+, VCOM_ = 0V
All VIN_ = +5V, VCOM_ = 0V
GND Supply Current
IGND
All VIN_ = 0V or V+, VCOM_ = 0V
TA
MIN
+25°C
TYP
MAX
140
200
140
250
E
300
+25°C
E
UNITS
µA
350
+25°C
200
E
300
400
+25°C
0
E
1
µA
10
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Fault-Free Analog Signal Range
On-Resistance
On-Resistance Match Between
Channels (Note 4)
VCOM_,
VNO_, VNC_
E
RON
ICOM_ = 10mA;
VNO_, VNC_ = +10V
∆RON
ICOM_ = 10mA;
VNO_, VNC_ = +10V
0
+25°C
E
+25°C
16
25
0.4
30
1.5
E
2
+25°C
3
6
On-Resistance Flatness
RFLAT(ON)
ICOM_ = 10mA;
VNO_, VNC_ = +2V, +6V, +10V
E
NO_, NC_ Off-Leakage Current
(Note 6)
INO_(OFF),
INC_(OFF)
VCOM_ = +1V, +10V;
VNO_, VNC_ = +10V, +1V
+25°C
-1
+1
E
-60
+60
COM_ Off-Leakage Current
(Note 6)
ICOM_(OFF)
VCOM_ = +1V, +10V;
VNO_, VNC_ = +10V, +1V
+25°C
-1
+1
E
-60
+60
COM_ On-Leakage Current
(Note 6)
VCOM_ = +1V, +10V;
VNO_, VNC_ = +1V, +10V,
or floating
+25°C
-2
+2
ICOM_(ON)
E
-60
+60
7
Ω
Ω
Ω
nA
nA
nA
FAULT
Fault-Protected Analog
Signal Range
VCOM_,
VNO_, VNC_
V+ = +12V, V- = 0V
E
-36
+36
V+ = V- = 0V
E
-40
+40
NO_ or NC_ Off-Leakage
Current (Note 6)
INO_(OFF),
INC_(OFF)
VNO_, VNC_ = ±36V; V+ = +12V;
V- = 0V
+25°C
-1
+1
E
-10
+10
COM_ Off-Leakage Current
(Note 6)
ICOM_(OFF)
VNO_, VNC_ = ±36V; V+ = +12V;
V- = 0V
+25°C
-1
+1
E
-10
+10
NO_ or NC_ Leakage Current
(Note 6)
INO_, INC_
V+ = V- = 0V; VNO_, VNC_ = ±40V
4
+25°C
-1
+1
E
-10
+10
_______________________________________________________________________________________
V
µA
µA
µA
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
(V+ = +12V, V- = 0V, VIH = +2.4V, VIL = +0.8V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Notes 2, 3)
PARAMETER
COM_ Leakage Current
(Note 6)
SYMBOL
CONDITIONS
ICOM_
V+ = V- = 0V; VNO_, VNC_ = ±40V
TA
MIN
TYP
MAX
+25°C
-1
+1
E
-10
+10
UNITS
µA
Fault Response Time
tRES
VNO_, VNC_ = +36V; RL = 300Ω
E
200
ns
Fault Recovery Time
tREC
VNO_, VNC_ = +36V; RL = 300Ω
E
1
µs
Turn-On Time
tON
VNO_ or VNC_ = +10V, RL = 300Ω, +25°C
CL = 35pF, Figure 2
E
140
Turn-Off Time
tOFF
VNO_ or VNC_ = +10V, RL = 300Ω, +25°C
CL = 35pF, Figure 2
E
75
Break-Before-Make Time Delay
(MAX314F Only) (Note 6)
tBBM
VNO_ or VNC_ = +10V, RL = 100Ω, +25°C
CL = 10pF, Figure 3
E
SWITCH DYNAMICS
Charge Injection
Q
VGEN = 0V, RGEN = 0Ω, CL = 1nF,
Figure 4
325
425
175
225
10
65
ns
ns
5
+25°C
ns
-10
pC
LOGIC INPUT
Input Logic High
VIH
E
Input Logic Low
VIL
E
Input Leakage Current
(Note 6)
IIN
VIN_ = 0V or V+
2.4
E
-1
E
+9
V
0.8
V
+1
µA
+36
V
POWER SUPPLY
Power-Supply Range
V+
All VIN_ = +5V, VCOM_ = +6V
V+ Supply Current
I+
All VIN_ = 0V or V+, VCOM_ = +6V
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
+25°C
160
400
E
+25°C
E
300
70
150
µA
250
The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Electrical specifications at -40°C are guaranteed by design and not production tested.
∆RON = RON(MAX) - RON(MIN).
Flatness is defined as the difference between the maximum and minimum value of on-resistance over the specified analog
signal range.
Single-supply leakage parameters are guaranteed by testing with dual supplies at the maximum rated temperature.
Guaranteed by design.
Off-isolation = 20 log10 [VCOM/(VNC or VNO)], VNC or VNO = output, VCOM = input to off switch.
Between any two switches.
_______________________________________________________________________________________
5
MAX312F/MAX313F/MAX314F
ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued)
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
(DUAL SUPPLIES)
12
V+ = +15V
V- = -15V
TA = +85°C
10
V+ = +9V
V- = 0V
V+ = +12V
V- = 0V
V+ = +15V
V- = 0V
25
20
9
RON (Ω)
15
V+ = +15V
V- = -15V
RON (Ω)
RON (Ω)
V+ = +10V
V- = -10V
30
MAX312F/13F/14F toc02
V+ = +5V
V- = -5V
20
15
MAX312F/13F/14F toc01
25
ON-RESISTANCE vs. VCOM
(SINGLE SUPPLY)
TA = +25°C
MAX312F/13F/14F toc03
ON-RESISTANCE vs. VCOM
(DUAL SUPPLIES)
V+ = +24V
V- = 0V
15
TA = -40°C
6
10
3
5
V+ = +20V
V- = -20V
0
0
-10
-5
0
5
10
15
20
-5
5
10
VCOM (V)
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
(SINGLE SUPPLY)
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
15
TA = +25°C
TA = -40°C
0
6
12
18
24
30
36
VCOM (V)
CHARGE INJECTION vs. VCOM
10,000
ICOM(ON)
1000
15
200
MAX312F/13F/14F toc05
TA = +85°C
MAX312F/13F/14F toc04
20
10
100
DUAL SUPPLIES: ±15V
150
100
10
INO(OFF),
INC(OFF)
ICOM(OFF)
50
1
0
SINGLE SUPPLY: +12V
5
0.1
V+ = +12V
V- = 0V
2
4
6
8
10
-100
-40
12
-15
10
200
100
0
-200
IGND
2.5
DUAL SUPPLIES
2.0
-15
10
35
TEMPERATURE (°C)
60
85
0
5
500
400
10
15
300
tON
200
tOFF
SINGLE SUPPLY
1.5
100
0
1.0
-300
-40
-5
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE (DUAL SUPPLIES)
tON/tOFF (ns)
I+
I-
-10
VCOM (V)
3.0
THRESHOLD VOLTAGE (V)
DUAL SUPPLIES:
V+ = +15V, V- = -15V, VIN_ = +5V
MAX312F/13F/14F toc07
500
-100
-15
LOGIC-LEVEL THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
300
85
60
TEMPERATURE (°C)
VCOM (V)
400
35
MAX312F/13F/14F toc09
0
-50
DUAL SUPPLIES:
V+ = +15V, V- = -15V
0.01
0
6
0
MAX312F/13F/14F toc08
RON (Ω)
-10
VCOM (V)
25
V+ = +36V
V- = 0V
0
-15
Q (pC)
-15
LEAKAGE CURRENT (pA)
-20
V+ = +28V
V- = 0V
MAX312F/13F/14F toc06
5
SUPPLY CURRENT (µA)
MAX312F/MAX313F/MAX314F
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
0
5
10
15
20
25
SUPPLY VOLTAGE (V)
30
35
40
5
10
15
SUPPLY VOLTAGE (V+, V-)
_______________________________________________________________________________________
20
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
80
150
tON
100
tON
40
160
50
tOFF
27
36
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
FREQUENCY RESPONSE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
FAULT CURRENT vs. FAULT VOLTAGE
(DUAL SUPPLIES)
THD + N (%)
ON-RESPONSE
-40
OFF-ISOLATION
-60
±15V DUAL SUPPLIES:
IN = OUT = 600Ω, VP-P = 5V
0.001
DUAL SUPPLIES:
V+ = +15V, V- = -15V
150
100
ICOM (µA)
0
200
MAX312F/13F/14F toc14
MAX312F/13F/14F toc13
0.01
MAX312F/13F/14F toc15
TEMPERATURE (°C)
V+ = +15V, V- = -15V
50
0
-50
-80
-100
-100
-150
CROSSTALK
0.0001
0.1
1
10
100
-200
10
1000
FOR |VCOM| < VSUPPLY,
ICOM = VCOM/RL
100
1k
10k
FREQUENCY (Hz)
FREQUENCY (MHz)
-60
-40
-20
0
20
40
60
VCOM (V)
FAULT CURRENT vs. FAULT VOLTAGE
(SINGLE SUPPLY)
200
MAX312F/13F/14F toc16
0.01
+12V SINGLE SUPPLY
150
100
ICOM (µA)
-120
0.001
tOFF
SUPPLY VOLTAGE (V+)
20
-20
80
DUAL SUPPLIES: ±15V
0
18
tON
120
40
V- = GND
9
V+ = +12V, V- = 0V
tOFF
0
LOSS (dB)
200
tON/tOFF (ns)
120
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE (SINGLE SUPPLY)
MAX312F/13F/14F toc11
200
tON/tOFF (ns)
160
tON/tOFF (ns)
250
MAX312F/13F/14F toc10
200
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE (DUAL SUPPLIES)
MAX312F/13F/14F toc12
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE (SINGLE SUPPLY)
50
0
-50
-100
-150
FOR 0V < VCOM < VSUPPLY,
ICOM = VCOM/RL
-200
-60
-40
-20
0
20
40
60
VCOM (V)
_______________________________________________________________________________________
7
MAX312F/MAX313F/MAX314F
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAX312F/MAX313F/MAX314F
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
FAULT RECOVERY TIME (POSITIVE INPUT)
INPUT OVERVOLTAGE vs. OUTPUT
MAX312F/13F/14F toc18
MAX312F/13F/14F toc17
+25V
VNO_, VNC_
INPUT
+25V
VNO_, VNC_
INPUT
+5V
GND
GND
-25V
+5V
VCOM_
OUTPUT
GND
+15V
GND
-15V
1µs/div
2ms/div
FAULT RESPONSE TIME
(POSITIVE INPUT)
FAULT RECOVERY TIME
(NEGATIVE INPUT)
MAX312F/13F/14F toc20
MAX312F/13F/14F toc19
GND
-5V
VNO_, VNC_
INPUT
VNO_, VNC_
INPUT
10V/div
-25V
GND
GND
VCOM_
OUTPUT
-5V
VCOM_
OUTPUT
10V/div
GND
400ns/div
1µs/div
FAULT RESPONSE TIME
(NEGATIVE INPUT)
FAULT RESPONSE
(V+ = 0V, V- = -15V)
MAX312F/13F/14F toc21
MAX312F/13F/14F toc22
+25V
VNO_, VNC_
INPUT
GND
VNO_, VNC_
INPUT
10V/div
GND
-25V
GND
VCOM_
OUTPUT
10V/div
1µs/div
8
GND
VCOM_
OUTPUT
500mV/div
200µs/div
_______________________________________________________________________________________
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
PIN
NAME
FUNCTION
MAX312F
MAX313F
MAX314F
1, 16, 9, 8
1, 16, 9, 8
1, 16, 9, 8
IN1, IN2, IN3, IN4
2, 15, 10, 7
2, 15, 10, 7
2, 15, 10, 7
COM1, COM2, COM3,
COM4
Analog Switch Common Terminals
3, 14, 11, 6
—
—
NC1, NC2, NC3, NC4
Analog Switch Normally Closed Terminals
—
3, 14, 11, 6
—
NO1, NO2, NO3, NO4
Analog Switch Normally Open Terminals
—
—
3, 6
NO1, NO4
Analog Switch Normally Open Terminals
—
—
14, 11
NC2, NC3
Analog Switch Normally Closed Terminals
4
4
4
V-
5
5
5
GND
Ground. Connect to digital ground.
12
12
12
N.C.
No Connection. Not internally connected.
13
13
13
V+
Detailed Description
The MAX312F/MAX313F/MAX314F are fault-protected
CMOS analog switches with unique operation and
construction. These switches differ considerably from
traditional fault-protection switches, with several advantages. First, they are constructed with two parallel
FETs, allowing very low on-resistance when the switch
is on. Second, they allow signals on the NO_ or NC_
pins that are within, or slightly beyond, the supply rails
to be passed through the switch to the COM_ terminal
(or vice versa), allowing true rail-to-rail signal operation.
Third, the MAX312F/MAX313F/MAX314F have the same
fault-protection performance on any of the NO_, NC_,
or COM_ switch inputs. Operation is identical for both
fault polarities. The fault protection extends to ±36V
from GND with ±15V supplies.
During a fault condition, the particular overvoltage input
(COM_, NO_, NC_) pin becomes high impedance
regardless of the switch state or load resistance. When
power is removed, the fault protection is still in effect. In
this case, the COM_, NO_, or NC_ terminals are a virtual open circuit. The fault can be up to ±40V with power
off. The switches turn off when V+ is not powered,
regardless of V-.
Pin Compatibility
These switches have identical pinouts to common nonfault-protected CMOS switches. They allow for carefree
Logic-Control Digital Inputs
Negative-Supply Voltage Input. Connect to GND for singlesupply operation. Bypass with a 0.1µF capacitor to GND.
Positive-Supply Voltage Input. Bypass with a 0.1µF capacitor
to GND.
direct replacement in existing printed circuit boards
since the NO_, NC_, and COM_ pins of each switch are
fault protected.
Internal Construction
Internal construction is shown in Figure 1, with the analog signal paths shown in bold. A single NO switch is
shown. The NC configuration 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 simultaneously according to the input fault
condition and the logic-level state.
Normal Operation
Two comparators continuously compare the voltage on
the COM_, NO_, and NC_ pins with V+ and V-. When
the signal on COM_, 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.
Positive Fault Condition
When the signal on NO_ (or NC_) and COM_ exceeds
V+, the high-fault comparator output is high, turning off
FETs N1 and P1. This makes the NO_ (or NC_) and
COM_ pins high impedance regardless of the switch
_______________________________________________________________________________________
9
MAX312F/MAX313F/MAX314F
Pin Description
MAX312F/MAX313F/MAX314F
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
state. If the switch state is off, all FETs are turned off and
both NO_ (or NC_) and COM_ are high impedance.
Negative Fault Condition
When the signal on NO_ (or NC_) and COM_ exceeds V-,
the low-fault comparator output is high, turning off FETs
N1 and P1. This makes the NO_ (or NC_) and COM_ pins
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.
Transient Fault Response and Recovery
When a fast rise-time and fall-time transient on NO_,
NC_, or COM_ exceeds V+ or V-, the output follows the
input 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 1µs. For negative faults,
the recovery time is typically 0.6µs. These values
depend on the output resistance and capacitance, and
are not production tested or guaranteed. The delays
are not dependent on the fault amplitude. Higher load
resistance and capacitance increase recovery times.
Ground
There is no galvanic connection between the analog
signal 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.
However, the potential of the analog signals must be
defined or at least limited with respect to GND.
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 analog switches. This drive signal is the only connection between the
power supplies and the analog signals.
Bipolar Supplies
The MAX312F/MAX313F/MAX314F operate with bipolar
supplies between ±4.5V and ±20V. The V+ and V- supplies need not be symmetrical, but their difference cannot exceed the absolute maximum rating of 44V.
Single Supply
The MAX312F/MAX313F/MAX314F operate from a single supply between +9V and +36V when V- is connected to GND.
Fault-Protection Voltage and Power Off
The maximum fault voltage on the NO_ (or NC_) and
COM_ pins is ±36V with power applied and ±40V with
power off.
Failure Modes
Exceeding the fault-protection voltage limits on NO_,
NC_, or COM_, even for very short periods, can cause
the device to fail (see the Absolute Maximum Ratings).
The failure modes may not be obvious, and failure in
one switch may or may not affect other switches in the
same package.
Ordering Information (continued)
PART
TEMP RANGE
PIN-PACKAGE
MAX313FESE
-40°C to +85°C
16 SO
MAX313FEPE
-40°C to +85°C
16 Plastic DIP
MAX314FESE
-40°C to +85°C
16 SO
MAX314FEPE
-40°C to +85°C
16 Plastic DIP
Chip Information
TRANSISTOR COUNT: 251
PROCESS: CMOS
SUBSTRATE CONNECTED TO: V+
10
______________________________________________________________________________________
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
NORMALLY OPEN SWITCH CONSTRUCTION
V+
HIGH
FAULT
P1
NO_
COM_
N1
LOW
FAULT
ON
IN_
MAX312F
MAX313F
MAX314F
GND
VESD DIODE
Figure 1. Functional Diagram
V+
V+
3V
NO_ OR NC_
VIN_
10V
50%
0V
VIN_
MAX312F
MAX313F
MAX314F COM_
GND
V-
10V
VOUT
90%
90%
VOUT
RL
CL
V-
0V
tOFF
tON
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 2. Switch Turn-On/Turn-Off Times
______________________________________________________________________________________
11
MAX312F/MAX313F/MAX314F
Test Circuits/Timing Diagrams
MAX312F/MAX313F/MAX314F
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
Test Circuits/Timing Diagrams (continued)
V+
VIN_
IN_
IN_
NO_
NC_
10V
VIN_
MAX314F COM_
VOUT
COM_
GND
tF < 5ns
tR < 5ns
3V
V+
V-
CL
RL
50%
0V
VNO_, VNC_
90%
VOUT
V-
0V
tBBM
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 3. MAX314F Break-Before-Make Interval
V+
VIN_
IN_ V+
RGEN
NO_ OR NC_
MAX312F
MAX313F
MAX314F
GND
3V
VGEN
VIN_
0V
VOUT
COM_
VOUT
∆VOUT
VCL
V-
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGETRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆VOUT x CL
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 4. Charge Injection
V+
V+
NO_
V+
IN_
MAX312F NC_
MAX313F
MAX314F
COM_
GND
V-
1MHz
CAPACITANCE
ANALYZER
VV- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 5. COM_, NO_, NC_ Capacitance
12
______________________________________________________________________________________
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
50Ω RESISTOR
ONLY NEEDED
FOR CROSSTALK
AND ISOLATION
V+
0.1µF
NETWORK
ANALYZER
VIN
V+
50Ω
50Ω
COM_
3.0V
IN_
MAX312F
MAX313F
MAX314F
50Ω
VOUT
MEAS
NO_, NC_
GND
V-
REF
50Ω
50Ω
0.1µF
VMEASUREMENTS ARE STANDARDIZED AGAINST SHORT AND OPEN AT SOCKET TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ OR NC_ TERMINALS.
ON-RESPONSE IS MEASURED BETWEEN COM_ AND ON NO_ OR NC_ TERMINALS.
CROSSTALK IS MEASURED BETWEEN COM_ TERMINALS WITH ALL SWITCHES ON.
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 6. Frequency Response, Off-Isolation, and Crosstalk
Pin Configurations (continued)
TOP VIEW
IN1
1
16 IN2
COM1
2
15 COM2
NO1
3
14 NO2
V-
4
GND
5
13 V+
MAX313F
12 N.C.
NO4
6
11 NO3
COM4
7
10 COM3
IN4
8
9
IN3
IN1
1
16 IN2
COM1
2
15 COM2
NO1
3
14 NC2
V-
4
GND
5
NO4
6
11 NC3
7
10 COM3
IN4
8
9
IN3
DIP/SO
MAX313F
LOGIC
SWITCH
1
12 N.C.
COM4
DIP/SO
0
13 V+
MAX314F
OFF
ON
LOGIC
0
1
MAX314F
SWITCHES SWITCHES
1, 4
2, 3
OFF
ON
ON
OFF
N.C. = NOT CONNECTED. SWITCHES SHOWN FOR LOGIC 0 INPUT.
ALL SWITCHES ARE OFF WITH POWER REMOVED.
______________________________________________________________________________________
13
MAX312F/MAX313F/MAX314F
Test Circuits/Timing Diagrams (continued)
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
PDIPN.EPS
MAX312F/MAX313F/MAX314F
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
14
______________________________________________________________________________________
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
16L SOIC.EPS
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX312F/MAX313F/MAX314F
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)