Next-generation capacitive touch platform offers high resolution sensing

October 26, 2012 // By Paul Buckley
Semtech Corporation has unveiled the SX95xx platform of capacitive touch ICs for a wide range of home appliances and consumer electronics.

The feature-rich touch button family enhances the ECO mode present in many green home electronics by integrating an IR decoder for system wake up. This enables the host to go into sleep mode during system standby and minimizes the overall power consumption.

The analog sensor front end in this platform is equipped with a high-resolution ADC, which can detect down to 4fF of capacitance and is optimized for robust touch and proximity detection.  These controllers also feature an advanced 256-step LED driver for various blinking and breathing control providing enhanced visual feedback in TV applications. Each device is designed with a unique innovative circuitry which combines the capacitive sensor with the LED driver to reduce the overall solution footprint.

 The SX9510/11/12/13 are in an 8-channel configuration which are offered as space saving 4 mm x 4 mm 20-QFN and 4.4 mm x 7.8 mm 24-TSSOP packages; and the SX9500/01 provide 4-channels  in a 3 mm x3 mm 20-QFN package. Semtech guarantees all of these devices to operate over the extended (-40 to +85°C) temperature range.

Availability and Pricing

The 8-channel SX9510, SX9511, SX9512 and SX9513 are available in production quantities and are priced at $1.18, $0.85, $0.99 and $0.71 respectively in 1,000-piece lots.  The 1,000-piece price for the TSSOP package options are SX9510, SX9511, SX9512 and SX9513 are $1.22, $0.88, $1.02 and $0.74 respectively. The 4-channel SX9500 and SX9501 come inQFN packages and are priced at $0.50 in 1,000-piece lots.

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