Key benefits

• Proximity operation possible, no contact required
• Operates when wearing gloves
• Useable with dirt on the touch area
• Works with any event that generates a pre-defined change in capacitance

Key features

• Detects capacitance changes on a remote sensing plate
• Changes in the static capacitance are automatically compensated through continuous auto-calibration
• Sensing plate and the IC can be separated by a distance of several metres
• Adjustable sensitivity
• Adjustable response time

Key applications

• Mobile phones or portable entertainment units
• Medical applications
• Explosive environments
• Vandal proofing
• Under upholstery, handles, mats, glass, carpets, tiles etc.

Descriptive summary

Compared to alternative switches and sensors, capacitive options have a number of advantages. Resistance-based sensing relies on contact, but capacitive sensors can switch without contact due to proximity sensing. And without the need for foil on the switching area, materials costs are reduced.

Key applications

• Basestation – discretes focus / transceiver board
• Digital media adapters
• LCD display – discretes focus
• PCI analog / DVB-T stereo TV receiver
• UMA-enabled GSM/GPRS/EDGE VAS Phone (6100)

Descriptive summary

New Fast-mode Plus devices operate at 1 MHz up to 540 pF
NXP's new I²C Fast-mode Plus (Fm+) devices go from zero to 1 MHz so you can go to the next design level with higher data rates and up to 540 pF bus loading. In computing, telecom and networking systems architecture the trend is for greater use of I²C-bus as a maintenance and control bus, so more bandwidth and more devices on the bus is required.

Application examples
The I²C-bus appears in virtually every application. In cellular handsets, LED blinkers and dimmers can control keypad, fun lighting and status LEDs. These ICs can also be used for more advanced status or illumination control while off-loading host processors in LCD displays. LCD segment or LCD matrix drivers with an I²C interface are ideal for cordless telephone handsets.

I²C serial EEPROM can store preset information in an MP3 player or large LCD display, where PAL or NTSC settings during manufacture are set using I²C DIP switches. For environmental sensing, I²C temperature sensors can monitor local temperatures: particularly important in wireless basestations, where I²C repeaters / hubs / extenders are also used, to isolate capacitance from the backplane.

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Key benefits

• Wide air gap between sensor and target
• Speed detection capability down to 0 Hz
• Wide frequency range
• Prepared for injection moulding (stable leadframe, positioning aids)
• Lower total cost of electro-mechanical system due to MR benefits and integrated components

Key features

• Zero speed capability
• Large measuring distance / air gap up to 2.9mm
• High-frequency: 25 kHz
• Output characteristics: two-wire current and open collector interface

Key applications

• Anti-blocking systems (ABS)
• Engine management (crankshaft, camshaft)
• Transmission systems
• Vehicle speed

Descriptive summary

The well-tried and trusted KMI1xx technology provides high robustness against large magnetic fields and high temperatures, and is very stable over temperature and life time. A choice of 3 different back-biasing magnets covers sensing of active or passive targets. Devices in the KMI15 and KMI20 families have a current output using two-wire technology, while those in the KMI16 and KMI18 families feature an open collector output, with three-wire technology.

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Key benefits

• Accurate and reliable
• Long term stability
• Positive temperature coefficient
• Fail-safe behaviour

Key applications

• Transmission
• Engine oil and coolant
• Heating systems and air-conditioning
• Overheating protection
• White goods and power supply

Descriptive summary

The KTY series offers a wide choice of devices and, with both plastic and glass leaded and SMD package options, you will find a solution to fit almost any application.

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