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Fault-Protected, High-Voltage Signal-Line Protectors

Product Details

Key Features

Applications/Uses

Parametric specs for Signal-Line Protectors
Functions 8-Line
Signal Path Leakage (±nA) (max) 20
ΔRON 10
VSUPPLY (V) 9.0 to 36.0
VSUPPLY (Dual) (±V) (Dual) 8 to 18
RON (Ω) (max) 100
Fault Protect. (±V) 40
Package/Pins SOIC (W)/18
SSOP/20
Budgetary
Price (See Notes)
4.42
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Simplified Block Diagram

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Parameters

Parametric specs for Signal-Line Protectors
Functions 8-Line
Signal Path Leakage (±nA) (max) 20
ΔRON 10
VSUPPLY (V) 9.0 to 36.0
VSUPPLY (Dual) (±V) (Dual) 8 to 18
RON (Ω) (max) 100
Fault Protect. (±V) 40
Package/Pins SOIC (W)/18
SSOP/20
Budgetary
Price (See Notes)
4.42

Key Features

  • Overvoltage Protection
    • ±40V with Power Off
    • ±36V with Power On
  • Open Signal Paths with Power Off
  • Output Clamps to Either Rail with an Input Overvoltage
  • Any On Channel Output is Not Affected by an Overvoltage to Any Other Channel
  • 100Ω max On-Resistance
  • 10ns Overvoltage Turn-On Delay
  • No Latchup During Power Sequencing
  • Rail-to-Rail Signal Handling
  • 500Ω Output Clamp Resistance During Overvoltage

Applications/Uses

  • Automated Test Equipment (ATE)
  • Data Acquisition Systems
  • Hot-Insertion Boards/Systems
  • Process Control Systems
  • Redundant/Backup Systems
  • Sensitive Instruments

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_) furnishes typically 19mA from the appropriate polarity supply 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 protectors. 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 protectors 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 TA = +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.

Simplified Block Diagram

MAX4506, MAX4507: Typical Operating Circuit MAX4506, MAX4507: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .