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MAX4505
Fault-Protected, High-Voltage, Signal Line Protector
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Status
Active: In Production.
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 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.
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Data Sheet
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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
- 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
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Applications/Uses
- Automated Test Equipment (ATE)
- Data Acquisition
- Hot-Insertion Boards/Systems
- Process Control Systems
- Redundant/Backup Systems
- Sensitive Instruments
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Key Specifications:
| Signal-Line Protectors |
| Part Number |
Functions |
Signal Path Leakage
(±nA) |
ΔRON |
Features |
VSUPPLY
(V) |
VSUPPLY (Dual)
(±V) |
RON
(Ω) |
Fault Protect.
(±V) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max |
Dual |
max |
max w/pins |
See Notes |
| MAX4505 |
1-Line |
20 |
10 |
Automatic Protection |
9.0 to 36.0 |
8 to 18 |
100 |
40 |
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9 |
$1.22 @1k |
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See All Signal-Line Protectors (6)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Application Notes
Product Guides
Reliability Reports
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX4505EUA
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Active |
µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX4505EUA-T
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Active |
µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX4505EUK
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Active |
SOT;5 pin;9 mm²
Outline Drawing:21-0057 (PDF)
Land Pattern: 90-0174 (PDF)
Use pkgcode/variation: U5-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX4505EUK+
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Active |
SOT;5 pin;9 mm²
Outline Drawing:21-0057 (PDF)
Land Pattern: 90-0174 (PDF)
Use pkgcode/variation: U5+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4505EUK+T
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Active |
SOT;5 pin;9 mm²
Outline Drawing:21-0057 (PDF)
Land Pattern: 90-0174 (PDF)
Use pkgcode/variation: U5+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4505EUK-T
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Active |
SOT;5 pin;9 mm²
Outline Drawing:21-0057 (PDF)
Land Pattern: 90-0174 (PDF)
Use pkgcode/variation: U5-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-1514
Rev 0;
1999-07-01
This page last modified: 2007-06-04
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