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Part: MAX367EPN
Category:
Analog & Mixed-Signal Processing
-> Switches & Multiplexers
-> Analog Switches
Description: Signal-line Circuit Protectors
Company: Maxim Integrated Products
Datasheet: Download MAX367EPN datasheet File size : 325 kB
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Datasheet text preview:
19-0326; Rev 0; 12/94
Signal-Line Circuit Protectors
_______________General Description
The MAX366 and MAX367 are multiple, two-terminal circuit protectors. Placed in series with signal lines, each two-terminal device guards sensitive circuit components against voltages near and beyond the normal supply voltages. These devices are used at interfaces where sensitive circuits are connected to the external world and could encounter damaging voltages (up to 35V beyond the supply rails) during power-up, power-down, or fault conditions. The MAX366 contains three independent protectors and the MAX367 contains eight. They can protect analog signals using either unipolar (4.5V to 36V) or bipolar (±2.25V to ±18V) power supplies. Each protector is symmetrical. Input and output terminals may be freely interchanged. These devices are voltage-sensitive MOSFET transistor arrays that are normally on when power is applied and normally open circuit when power is off. With ±10V supplies, on-resistance is 100 max and leakage is less than 1nA at +25°C. When signal voltages exceed or are within approximately 1.5V of either power-supply voltage (including when power is off), the two-terminal resistance increases dramatically, limiting fault current as well as output voltage to sensitive circuits. The protected side of the switch maintains the correct polarity and clamps approximately 1.5V below the supply rail. There are no "glitches" or polarity reversals going into or coming out of a fault condition.
____________________________Features
o ±40V Overvoltage Protection o Open Signal Paths with Power Off 100 Signal Paths with Power On o 1nA Max Path Leakage at +25°C o 44V Maximum Supply Voltage Rating o Automatic Protection; No Programming or Controls
MAX366/MAX367
______________Ordering Information
PART MAX366CPA MAX366CSA MAX366C/D MAX366EPA MAX366ESA MAX366MJA MAX367CPN MAX367CWN MAX367C/D MAX367EPN MAX367EWN MAX367MJN TEMP. RANGE 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 -55°C to +125°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 -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP** 18 Plastic DIP 18 Wide SO Dice* 18 Plastic DIP 18 Wide SO 18 CERDIP**
________________________Applications
Process Control Systems Redundant/Backup Systems Hot-Insertion Boards/Systems ATE Equipment Data-Acquisition Systems Sensitive Instruments
MAX367 available after January 1, 1995.
* Dice are tested at TA = +25°C only. * Contact factory for availability. Pin Configurations appear at end of data sheet.
___________________________________________________Typical Operating Circuit
ELECTRONICS FAULT! REMOTE SENSOR +10V REG. +28V 1 (SHORT) IN1 PROTECTOR
MAX366
V+ OUT1
8 7
+12V
2 3 4
IN2 IN3 V-
OUT2 OUT3
6 5
A ENSITIVE S MPLIFIER
(OPEN) FAULT!
________________________________________________________________ Maxim Integrated Products
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Signal-Line Circuit Protectors MAX366/MAX367
ABSOLUTE MAXIMUM RATINGS
V+ to V-....-0.3V, +44V IN_, OUT_ ........(V- + 44V), (V+ - 44V) Continuous Current into Any Terminal......±30mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle)..±70mA Continuous Power Dissipation (TA = +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW 8-Pin SO (derate 5.88mW/°C above +70°C)........471mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...889mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature Ranges MAX36_C_ _ ........0°C to +70°C MAX36_E_ _......-40°C to +85°C MAX36_M_ _ .........-55°C to +125°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10sec) .....+300°C
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
(V+ = +15V, V- = -15V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER Analog Signal Range Fault-Free Analog Signal Range Analog-Signal Output Range (Fault) SYMBOL VIN, VOUT VIN, VOUT VOUT CONDITIONS (Note 1) V+ = 15V, V- = -15V (Note 2) VIN = V+ or V-, 100k < ROUT < 1000M (Note 1) V+ = 15V, V- = -15V, VIN = ±10V, IOUT = 1mA Analog-Signal-Path Resistance R(IN-OUT) V+ = 10V, V- = -10V, VIN = ±5V, IOUT = 1mA V+ = 5V, V- = -5V, VIN = ±2V, IOUT = 1mA Signal-Path Resistance Match Signal-Path Leakage (Power Off) Signal-Path Leakage (without Fault Condition) Signal-Path Leakage (with Fault Condition) Signal-Path Leakage (with Overvoltage) POWER SUPPLY Power-Supply Range Power-Supply Range (without Fault Condition) Power-Supply Current V+, VV+, VI+, IR(IN-OUT) < 1000 (Note 2) +25°C, C, E, M +25°C, C, E, M +25°C C, E, M 0 ±2.25 -1 -10 ±18 ±18 1 10 V V µA R(IN-OUT) IIN(OFF) IOUT(ON) IIN(ON) IIN(OFF) VIN = ±10V, IOUT = 1mA V+ = V- = 0V, VIN = ±35V, VOUT = open circuit VIN = VOUT = ±10V VIN = ±25V, VOUT = open circuit V+ = V- = 0V, VOUT = 0V, VIN = ±35V TEMP. RANGE All All All +25°C C, E M +25°C C, E M +25°C C, E, M +25°C C, E, M +25°C C, E, M +25°C C, E, M +25°C C, E, M +25°C C, E, M 140 62 MIN (V+ - 40) -11 (V- + 3) 62 TYP MAX (V- + 40) 11 (V+ - 1.5) 85 100 125 100 125 150 350 400 7 10 10 1000 1 100 10 1000 10 1000 UNITS V V V
nA nA nA nA
-10 -1000 -1 -100 -10 -1000 -10 -1000
Note 1: Guaranteed, but not tested. Note 2: See Typical Operating Characteristics curves for fault-free analog signal range at various supply voltages.
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_______________________________________________________________________________________
Signal-Line Circuit Protectors
__________________________________________Typical Operating Characteristics
(V+ = +15V, V- = -15V, TA = +25°C, unless otherwise noted.)
MAX366/MAX367
TRANSFER CHARACTERISTICS (BIPOLAR SUPPLIES)
MAX366/7-02
TRANSFER CHARACTERISTICS (SINGLE SUPPLY)
OUTPUT VOLTAGE (V), INPUT & OUTPUT CURRENT (µA) OUTPUT LOAD = 1M V- = 0V 20 V+ = 25V
MAX366/7-03
15 OUTPUT VOLTAGE (V), INPUT & OUTPUT CURRENT (µA) 10 5 0 -5
V+ = +15V, V- = -15V V+ = +10V, V- = -10V V+ = +3V, V- = -3V
25
15 V+ = 15V 10 V+ = 10V 5 V+ = 5V 0
V+ = +5V, V- = -5V V+ = +10V, V- = -10V L OUTPUT OAD = 1M -35 -25 -15 V+ = +15V, V- = -15V -5 0 5 15 25 35
-10 -15
0
5
10
15
20
25
30
35
INPUT VOLTAGE (V)
INPUT VOLTAGE (V) VIN > (V+ - 35V)
PATH RESISTANCE vs. INPUT VOLTAGE (BIPOLAR SUPPLIES)
MAX366/7-04
PATH RESISTANCE vs. INPUT VOLTAGE (BIPOLAR SUPPLIES)
V± = ±3V V± = ±15V 450 PATH RESISTANCE () 400 350 300 250 200 150 100 50 V± = ±5V C ircuit of Fig. 6 -15 -10 -5 0 5 10 15 INPUT VOLTAGE (V) V± = ±10V
MAX366/7-05
1E+08 1E+07 PATH RESISTANCE () 1E+06 V± = ±10V 1E+05 1E+04 1E+03 1E+02 1E+01 Circuit of Fig. 6 -15 -10 -5 V± = ±15V
500
V± = ±3V
V± = ±5V
0 0 5 10 15
INPUT VOLTAGE (V)
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