MAX4505
PRODUCTIONFault-Protected, High-Voltage, Signal Line Protector
- Part Models
- 2
- 1ku List Price
- Starting From $2.63
Overview
- 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
- 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
- Tiny 5-Pin SOT23 Package
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 100Ω 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.
Applications
- Automated Test Equipment (ATE)
- Data Acquisition
- Hot-Insertion Boards/Systems
- Process Control Systems
- Redundant/Backup Systems
- Sensitive Instruments
Documentation
Data Sheet 1
Design Note 1
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX4505EUK+ | SOT_23 | ||
| MAX4505EUK+T | SOT_23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 29, 2026 - 2444A WAFER FAB |
||
| MAX4505EUK+ | PRODUCTION | |
| MAX4505EUK+T | PRODUCTION | |
|
Jan 11, 2021 - 1703RN ASSEMBLY |
||
| MAX4505EUK+ | PRODUCTION | |
| MAX4505EUK+T | PRODUCTION | |
|
Feb 4, 2015 - 1341_CANCELLATION ASSEMBLY |
||
| MAX4505EUK+ | PRODUCTION | |
| MAX4505EUK+T | PRODUCTION | |
|
Apr 20, 2026 - 2571C PIN/ERRATA |
||
| MAX4505EUK+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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