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%.
Low-power operation (< 100microamps at 14V)
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
Pricing: $1.80 in 1,000-piece volumes.