One-chip proximity/touch sensor solution for passive-entry systems

Maxim has introduced the MAX1441, a fully integrated, 2-channel, proximity and touch sensor IC for automotive passive-entry (PRKE) and user-control systems.

The MAX1441 combines high-sensitivity detection circuits with an embedded MAXQ microcontroller, power and protection functions, and interface I/O.

This integrated solution requires only five passive components to complete the capacitive sensing circuit. By contrast, the nearest competitive IC requires 16 passive components, as well as a costly high-voltage LDO regulator. This approach helps system designers save substantial board space and reduce solution cost by at least 30%.

Key features:

• 5V-28V supply 
• Low-power operation (< 100microamps at 14V)
  
• Long-range detection
  
• Integrated power regulation
  
• Overvoltage (up to 45V) and reverse-voltage protections (to -12V) with external diode
  
• Spread-spectrum anti-jamming technology
• 2Kwords flash memory
• 128 bytes SRAM
  
• Packaging: 20-pin TSSOP
  

Availability: Now
Pricing: $1.80 in 1,000-piece volumes.

For more information, please see the MAX1441 datasheet.

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