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MLX16305
Safety Interlock Switch Sensor Interface IC
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The MLX16305 is designed to diagnose the state of remote safety interlock switches in automotive safety applications (40V Load- dump). Its high accuracy allows it to be applied in a broad range of related automotive and industrial applications using current modulated sensors and switches.
The MLX16305 includes a current-limited regulated supply that is applied to one channel (i.e. to a remote switch or sensor) at a time. The supplied current, or the resulting supply voltage, are measured and presented as an analog voltage to the microcontroller for interpretation.
Each MLX16305 allows scanning up to 6 switches for changes in switch state, and for any type of short/open circuit failure mode. Multiple MLX16305 devices can be placed in parallel on the same ADC input of the microcontroller to scan up to 12 or 18, or ... switches.
The high current range allows contact cleaning for resistive switches, and the high accuracy allows monitoring of contact ageing and early failures detection.
APPLICATIONS
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1. FAIL SAFE READ OUT OF MULTIPLE SAFETY INTERLOCK SWITCHES:
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Using Resistive switches or Non-contact (Hall effect) switches
=>> AUTOMOTIVE SAFETY:
------> Seat occupancy
------> Seat belt buckle
------> Air bag presence detection
=>> INDUSTRIAL
------> Industrial security doors
------> Machine guarding
2. READ OUT OF 2-WIRE ANALOG (CURRENT MODULATED) SENSORS:
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For instance using the MLX90308, MLX90314 sensor interface IC's in analog (current output) mode [4 to 20mA].
=>> INDUSTRIAL SENSORS
------> Pressure sensing, strain gauge sensing, … |
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Features and Benefits
- 6 sense Channels
- Force-Sense measurement for remote switches to GND
- Current and Voltage measurement mode
- High measurement accuracy : +/- 5%
- Large Current measurement range : [0; 45]mA
- Switch/Sensor supply Output Voltage : 3V .. 8.25V
- Applicable with Resistive and with (Current modulated 2-wire) Hall effect Switches
- Automotive protected sense channels: 40V Load Dump, …
- Diagnoses open wires, shorts to Supplies and shorts between wires
- Internal over-current limitation
- Over-temperature detection
- Small Package: narrow body (150mils) SO16
Product Applications
Switches
Seatbelt
Assets
| DataSheet |
File Type |
Size |
Revision |
Date |
Action |
| MLX16305 DataSheet |
PDF |
354.3 KB |
rev006 |
5/9/2008 |
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| Product flyers |
File Type |
Size |
Revision |
Date |
Action |
| Flyer MLX16305 |
PDF |
701.0 KB |
003 |
12/11/2006 |
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