|
|
Part: MAX4505EUK-T
Category:
Discrete
-> Thyristors
-> Surge Protectors
Description: Fault-protected, High-voltage, Signal-line Protector
Company: Maxim Integrated Products
Datasheet: Download MAX4505EUK-T datasheet File size : 158 kB
Request For quote: Find where to buy MAX4505EUK-T
Datasheet text preview:
19-1514; Rev 0; 7/99
Fault-Protected, High-Voltage, Signal-Line Protector
General Description
The MAX4505 is a single signal-line protector featuring a fault-protected input and Rail-to-Rail® signal handling capability. The input is protected from overvoltage faults up to ±36V with power on or ±40V with power off. During a fault condition, the input terminal becomes an open circuit and only nanoamperes of leakage current flow from the source, while the switch output (AOUT) furnishes typically 19mA from the appropriate polarity supply to the load. This ensures an unambiguous rail-to-rail output when a fault begins and ends. The MAX4505 protects both unipolar and bipolar analog signals using either unipolar (+9V to +36V) or bipolar (±8V to ±18V) power supplies. The device has no logic control inputs; the protector is always on when the supplies are on. On-resistance is 100 max, and on-leakage is less than 0.5nA at TA = +25°C. The MAX4505 is available in 5-pin SOT23 and 8-pin µMAX packages.
Features
o Overvoltage Protection ±40V with Power Off ±36V with Power On o Open Signal Paths with Power Off o Output Clamps to Either Rail with an Input Overvoltage o 100 max On-Resistance o 10ns Overvoltage Turn-On Delay o No Latchup During Power Sequencing o Rail-to-Rail Signal Handling o 500 Output Clamp Resistance During Overvoltage o Tiny 5-Pin SOT23 Package
MAX4505
Applications
Process Control Systems Hot-Insertion Boards/Systems Data-Acquisition Systems Redundant/Backup Systems ATE Equipment Sensitive Instruments
PART MAX4505EUK-T MAX4505EUA
Ordering Information
TEMP. RANGE -40°C to +85°C -40°C to +85°C PINPACKAGE 5 SOT23-5 8 µMAX TOP MARK ADLW --
Typical Operating Circuit
TOP VIEW
VV-
Pin Configurations
MAX4505
VV+
V+
V+ AIN 1 5 V-
V+ 2 RAIL SENSOR AOUT 3 IN AIN AOUT OUT
ROUT
MAX4505
4
N.C.
SOT23-5
Pin Configurations continued at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ 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.
Fault-Protected, High-Voltage, Signal-Line Protector MAX4505
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND) V+ ......-0.3V to +44.0V V- .......-44.0V to +0.3V V+ to V-.......-0.3V to +44.0V AIN, AOUT (Notes 1, 2) .......±44V AIN Overvoltage with Power On .........±36V AIN Overvoltage with Power Off .........±40V Continuous Current into Any Terminal......±30mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle).......±70mA Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23-5 (derate 7.10mW/°C above +70°C) ...571mW 8-Pin µMAX (derate 4.10mW/°C above +70°C) ........330mW Operating Temperature Ranges MAX4505C_ _ ........0°C to +70°C MAX4505E_ _ .....-40°C to +85°C Storage Temperature Range .....-55°C to +150°C Lead Temperature (soldering, 10sec) .....+300°C
Note 1: The AOUT pin is not fault protected. Signals on AOUT exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum current rating. Note 2: The AIN pin is fault protected. Signals on AIN 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.
RECOMMENDED OPERATING GUIDELINES
V+ to GND .....-0.3V to +40V V- to GND ......-32V to +0.3V V+ to V- ..........40V AIN ......±40V AOUT .......V+ to VAIN to AOUT.........40V differential Continuous Current into Any Terminal ......30mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle) .......70mA
ELECTRICAL CHARACTERISTICS--Dual Supplies
(V+ = +15V, V- = -15V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) PARAMETER ANALOG SWITCH Fault-Free Analog Signal Range (Note 4) Analog Signal-Path Resistance Signal-Path Leakage Current (Note 5) Input Capacitance FAULT PROTECTION Fault-Protected Analog Signal Range (Notes 4, 6) Input Signal-Path Leakage Current, Supplies On Input Signal-Path Leakage Current, Supplies Off Output Clamp Current, Supplies On Output Clamp Resistance, Supplies On ±Fault Output Turn-On Delay Time 2 VAIN IAIN(ON) IAIN(OFF) IAOUT RAOUT Applies with power on Applies with power off VAIN = ±25V, VAOUT = open VAIN = ±40V, VAOUT = open V+ = 0, V- = 0 VAIN = 25V VAIN = -25V IAOUT = 1mA VAIN = 25V VAIN = -25V E E +25°C E +25°C E +25°C +25°C +25°C +25°C +25°C -36 -40 -20 -200 -20 -500 13 -26 19 -19 0.5 0.4 10 0.2 0.1 36 40 20 200 20 500 26 -13 1.0 1.0 V nA nA mA k ns VAIN RON IAOUT(ON) CAIN VAIN = ±15V VAIN = ±10V, IAOUT = 1mA VAOUT = ±10V, VAIN = ±10V or floating VAIN = 0, f = 1MHz E +25°C E +25°C E +25°C -0.5 -20 20 V65 V+ 100 125 0.5 20 V nA pF SYMBOL CONDITIONS TA MIN TYP MAX UNITS
RL = 10k, VAIN = ±25V
_______________________________________________________________________________________
Fault-Protected, High-Voltage, Signal-Line Protector
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +15V, V- = -15V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) PARAMETER ±Fault Recovery Time POWER SUPPLY Power-Supply Range V+, VI+ Power-Supply Current IVAIN = 15V VAIN = 15V E +25°C E +25°C E -150 -240 -45 ±8 45 ±18 150 240 µA V SYMBOL CONDITIONS RL = 10k, VAIN = ±25V TA +25°C MIN TYP 25 MAX UNITS µs
MAX4505
ELECTRICAL CHARACTERISTICS--Single Supply
(V+ = +12V, V- = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) PARAMETER ANALOG SWITCH Fault-Free Analog Signal Range (Note 4) Analog Signal-Path Resistance Signal-Path Leakage Current (Note 5) FAULT PROTECTION Fault-Protected Analog Signal Range (Notes 4, 6) Input Signal-Path Leakage Current, Supply On (Note 7) Input Signal-Path Leakage Current, Supply Off (Note 7) Output Clamp Current, Supply On Output Clamp Resistance, Supply On ±Fault Output Turn-On Delay Time ±Fault Recovery Time POWER SUPPLY Power-Supply Range Power-Supply Current Note 3: Note 4: Note 5: Note 6: Note 7: Note 8: V+, VI+ VAIN = 12V E +25°C E +9 5 +36 25 40 V µA VAIN IAIN(ON) IAIN(OFF) IAOUT RAOUT Applies with power on Applies with power off VAIN = ±25V, VAOUT = 0 VAIN = ±40V VAIN = 25V VAIN = ±25V RL = 10k, VAIN = 25V RL = 10k, VAIN = 25V E E +25°C E +25°C E +25°C +25°C +25°C +25°C -36 -40 -20 -200 -20 -500 3 5.5 1.0 10 2.5 0.2 0.2 36 40 20 200 20 500 10 2.5 V nA nA mA k ns µs VAIN RON IAOUT(ON) VAIN = 12V VAIN = 10V, IAOUT = 1mA VAIN = 10V or floating E +25°C E +25°C E -0.5 -20 0.05 0 125 V+ 200 250 0.5 20 V nA SYMBOL CONDITIONS TA MIN TYP MAX UNITS
The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. See Fault-Free Analog Signal Range vs. Supply Voltage graph in the Typical Operating Characteristics. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at TA = +25°C. Guaranteed by design. Guaranteed by testing with dual supplies. SOT packaged parts are 100% tested at +25°C. Limits at the maximum rated temperature are guaranteed by design and correlation limits at +25°C. Leakage tests are typical for SOT packaged parts. _______________________________________________________________________________________ 3
Others parts begin by ma
|
|
|
