MAX4506_03 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Fault-Protected, High-Voltage Signal-Line Protectors

19-1415; Rev 2; 2/03
Fault-Protected, High-Voltage
Signal-Line Protectors
General Description
The MAX4506/MAX4507 multiple, two-terminal signal-line
protectors are pin-compatible with the industry-standard
MAX366/MAX367. These new circuit protectors feature
fault-protected inputs and Rail-to-Rail^® signal handling
capability. The input pins are 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; but the switch output (OUT_) fur-
nishes typically 19mA from the appropriate polarity sup-
ply to the load. This ensures unambiguous rail-to-rail
outputs when a fault begins and ends.
The MAX4506 contains three independent protectors
while the MAX4507 contains eight independent protec-
tors. They can protect both unipolar and bipolar analog
signals using either unipolar (+9V to +36V) or bipolar
(±8V to ±18V) power supplies.
These devices have no logic control inputs; the protec-
tors are designed to be always-on when the supplies
are on. On-resistance is 100Ω max and matched within
7Ω, and on-leakage is less than 0.5nA at T_A = +25°C.
The MAX4506 is available in 8-pin SO/DIP packages.
The MAX4507 is available in 20-pin SSOP and 18-pin
SO/DIP packages.
Applications
Process-Control Systems
Hot-Insertion Boards/Systems
Data-Acquisition Systems
Redundant/Backup Systems
ATE Equipment
Sensitive Instruments
Typical Operating Circuit
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 Any On Channel Output is Not Affected
by an Overvoltage to Any Other Channel
o 100Ω max On-Resistance
o 10ns Overvoltage Turn-On Delay
o No Latchup During Power Sequencing
o Rail-to-Rail Signal Handling
o 500Ω Output Clamp Resistance During
Overvoltage
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX4506CSA
0°C to +70°C
8 SO
MAX4506CPA
0°C to +70°C
8 Plastic DIP
MAX4506C/D
0°C to +70°C
Dice*
MAX4506ESA
-40°C to +85°C
8 SO
MAX4506EPA
-40°C to +85°C
8 Plastic DIP
MAX4506MJA -55°C to +125°C 8 CERDIP**
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
**Contact factory for availability.
Pin Configurations
MAX4506 _V+ 8
1 IN1
OUT1 7
2 IN2
OUT2 6
3 IN3
4 _V-
OUT3 5
SWITCHED +15V
P
+15V
100k
OP AMP
TOP VIEW
IN1 1
IN2 2
IN3 3
V- 4
MAX4506
8 V+
7 OUT1
6 OUT2
5 OUT3
SO/DIP
-15V
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
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