Semtech Expands Ultra-Low Power, Resistive Touchscreen Controller Platform with 5-Wire, SPI Interface Device, with high ESD protection and ultra-low power consumption
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Semtech has announced the SX8652, an ultra-low power 4- or 5-wire resistive touchscreen controller with an SPI interface. The SX8652 is one of a new generation of touchscreen controllers that are optimized for low-power consumption (23µA), small size (1.46mm x 1.96mm chip-scale package), and high electrostatic discharge (ESD) protection (±15kV). These features make the SX8652 the most application-specific resistive touchscreen controller on the market for applications including industrial machine interfaces and portable devices, point-of-sales terminals, printers and other higher reliability touchscreen applications.
The SX8652 was designed to address the field returns issues prevalent in touchscreen applications due to destructive ESD events. Each analog input has been specifically designed to enable robust ESD protection up to ±15kV in both human body model (HBM) and IEC 61000-4-2 standards, eliminating the need for external ESD protection while minimizing cost and board space. The wide temperature operating range from -40 to +85°C coupled with the superior ESD protection and extremely low operating current make this a compelling product for a broad range of end user equipment.
Features
- Extremely Low Power Consumption: 23uA@1.8V 8kSPS
- Superior On-chip ESD Protection
- ±15kV HBM (X+,X-,Y+,Y-)
- ±2kV CDM
- ±25kV Air Gap Discharge
- ±15kV Contact Discharge
- ±300V MM
- Single 1.65V to 3.7V Supply/Reference
- 4-Wire or 5-Wire Resistive Touch Screen Interface
- Integrated Preprocessing Block to Reduce Host Loading and Bus Activity
- Four User Programmable Operation Modes provides Flexibility to address Different Application Needs (Manual, Automatic, Pen Detect, Pen Trigger)
- Low Noise Ratiometric Conversion
- Precision, High Speed 12-bit SAR ADC Operating At 74k SPS
- Throughput: 5000 (X-Y) coordinates/second (c/s) with 7-Sample Averaging
- Low Power Shut-Down Mode < 1uA
- SPI™ Serial Interface
- Touch Pressure Measurement (4-Wire)
- Auxiliary Input (4-Wire) For Alternate ADC Input or Start of Conversion Trigger
- Hardware & Software reset
- -40°C to +85°C operation
- Pb-Free, Halogen Free, RoHS/WEEE compliant product
- Windows CE 6.0, Linux Driver Support Available